| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <stdint.h> |
| #include <string.h> |
| #include <assert.h> |
| #include "syscfg/syscfg.h" |
| #include "os/os.h" |
| #include "ble/xcvr.h" |
| #include "nimble/ble.h" |
| #include "nimble/nimble_opt.h" |
| #include "nimble/nimble_npl.h" |
| #include "controller/ble_phy.h" |
| #include "controller/ble_phy_trace.h" |
| #include "controller/ble_ll.h" |
| #include "nrfx.h" |
| #if MYNEWT |
| #include "mcu/nrf52_clock.h" |
| #include "mcu/cmsis_nvic.h" |
| #include "hal/hal_gpio.h" |
| #else |
| #include "core_cm4.h" |
| #endif |
| |
| /* |
| * NOTE: This code uses a couple of PPI channels so care should be taken when |
| * using PPI somewhere else. |
| * |
| * Pre-programmed channels: CH20, CH21, CH23, CH25, CH31 |
| * Regular channels: CH4, CH5 and optionally CH17, CH18, CH19 |
| * - CH4 = cancel wfr timer on address match |
| * - CH5 = disable radio on wfr timer expiry |
| * - CH17 = (optional) gpio debug for radio ramp-up |
| * - CH18 = (optional) gpio debug for wfr timer RX enabled |
| * - CH19 = (optional) gpio debug for wfr timer radio disabled |
| * |
| */ |
| |
| /* XXX: 4) Make sure RF is higher priority interrupt than schedule */ |
| |
| /* |
| * XXX: Maximum possible transmit time is 1 msec for a 60ppm crystal |
| * and 16ms for a 30ppm crystal! We need to limit PDU size based on |
| * crystal accuracy. Look at this in the spec. |
| */ |
| |
| /* XXX: private header file? */ |
| extern uint8_t g_nrf_num_irks; |
| extern uint32_t g_nrf_irk_list[]; |
| |
| /* To disable all radio interrupts */ |
| #define NRF_RADIO_IRQ_MASK_ALL (0x34FF) |
| |
| /* |
| * We configure the nrf with a 1 byte S0 field, 8 bit length field, and |
| * zero bit S1 field. The preamble is 8 bits long. |
| */ |
| #define NRF_LFLEN_BITS (8) |
| #define NRF_S0LEN (1) |
| #define NRF_S1LEN_BITS (0) |
| #define NRF_CILEN_BITS (2) |
| #define NRF_TERMLEN_BITS (3) |
| |
| /* Maximum length of frames */ |
| #define NRF_MAXLEN (255) |
| #define NRF_BALEN (3) /* For base address of 3 bytes */ |
| |
| /* NRF_RADIO->PCNF0 configuration values */ |
| #define NRF_PCNF0 (NRF_LFLEN_BITS << RADIO_PCNF0_LFLEN_Pos) | \ |
| (RADIO_PCNF0_S1INCL_Msk) | \ |
| (NRF_S0LEN << RADIO_PCNF0_S0LEN_Pos) | \ |
| (NRF_S1LEN_BITS << RADIO_PCNF0_S1LEN_Pos) |
| #define NRF_PCNF0_1M (NRF_PCNF0) | \ |
| (RADIO_PCNF0_PLEN_8bit << RADIO_PCNF0_PLEN_Pos) |
| #define NRF_PCNF0_2M (NRF_PCNF0) | \ |
| (RADIO_PCNF0_PLEN_16bit << RADIO_PCNF0_PLEN_Pos) |
| #define NRF_PCNF0_CODED (NRF_PCNF0) | \ |
| (RADIO_PCNF0_PLEN_LongRange << RADIO_PCNF0_PLEN_Pos) | \ |
| (NRF_CILEN_BITS << RADIO_PCNF0_CILEN_Pos) | \ |
| (NRF_TERMLEN_BITS << RADIO_PCNF0_TERMLEN_Pos) |
| |
| /* BLE PHY data structure */ |
| struct ble_phy_obj |
| { |
| uint8_t phy_stats_initialized; |
| int8_t phy_txpwr_dbm; |
| uint8_t phy_chan; |
| uint8_t phy_state; |
| uint8_t phy_transition; |
| uint8_t phy_transition_late; |
| uint8_t phy_rx_started; |
| uint8_t phy_encrypted; |
| uint8_t phy_privacy; |
| uint8_t phy_tx_pyld_len; |
| uint8_t phy_txtorx_phy_mode; |
| uint8_t phy_cur_phy_mode; |
| uint8_t phy_bcc_offset; |
| int8_t rx_pwr_compensation; |
| uint32_t phy_aar_scratch; |
| uint32_t phy_access_address; |
| struct ble_mbuf_hdr rxhdr; |
| void *txend_arg; |
| ble_phy_tx_end_func txend_cb; |
| uint32_t phy_start_cputime; |
| }; |
| struct ble_phy_obj g_ble_phy_data; |
| |
| /* XXX: if 27 byte packets desired we can make this smaller */ |
| /* Global transmit/receive buffer */ |
| static uint32_t g_ble_phy_tx_buf[(BLE_PHY_MAX_PDU_LEN + 3) / 4]; |
| static uint32_t g_ble_phy_rx_buf[(BLE_PHY_MAX_PDU_LEN + 3) / 4]; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| /* Make sure word-aligned for faster copies */ |
| static uint32_t g_ble_phy_enc_buf[(BLE_PHY_MAX_PDU_LEN + 3) / 4]; |
| #endif |
| |
| /* RF center frequency for each channel index (offset from 2400 MHz) */ |
| static const uint8_t g_ble_phy_chan_freq[BLE_PHY_NUM_CHANS] = { |
| 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, /* 0-9 */ |
| 24, 28, 30, 32, 34, 36, 38, 40, 42, 44, /* 10-19 */ |
| 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, /* 20-29 */ |
| 66, 68, 70, 72, 74, 76, 78, 2, 26, 80, /* 30-39 */ |
| }; |
| |
| #if (BLE_LL_BT5_PHY_SUPPORTED == 1) |
| /* packet start offsets (in usecs) */ |
| static const uint16_t g_ble_phy_mode_pkt_start_off[BLE_PHY_NUM_MODE] = { 376, 40, 24, 376 }; |
| #endif |
| |
| /* Various radio timings */ |
| /* Radio ramp-up times in usecs (fast mode) */ |
| #define BLE_PHY_T_TXENFAST (XCVR_TX_RADIO_RAMPUP_USECS) |
| #define BLE_PHY_T_RXENFAST (XCVR_RX_RADIO_RAMPUP_USECS) |
| /* delay between EVENTS_READY and start of tx */ |
| static const uint8_t g_ble_phy_t_txdelay[BLE_PHY_NUM_MODE] = { 5, 4, 3, 5 }; |
| /* delay between EVENTS_END and end of txd packet */ |
| static const uint8_t g_ble_phy_t_txenddelay[BLE_PHY_NUM_MODE] = { 9, 4, 3, 3 }; |
| /* delay between rxd access address (w/ TERM1 for coded) and EVENTS_ADDRESS */ |
| static const uint8_t g_ble_phy_t_rxaddrdelay[BLE_PHY_NUM_MODE] = { 17, 6, 2, 17 }; |
| /* delay between end of rxd packet and EVENTS_END */ |
| static const uint8_t g_ble_phy_t_rxenddelay[BLE_PHY_NUM_MODE] = { 27, 6, 2, 22 }; |
| |
| /* Statistics */ |
| STATS_SECT_START(ble_phy_stats) |
| STATS_SECT_ENTRY(phy_isrs) |
| STATS_SECT_ENTRY(tx_good) |
| STATS_SECT_ENTRY(tx_fail) |
| STATS_SECT_ENTRY(tx_late) |
| STATS_SECT_ENTRY(tx_bytes) |
| STATS_SECT_ENTRY(rx_starts) |
| STATS_SECT_ENTRY(rx_aborts) |
| STATS_SECT_ENTRY(rx_valid) |
| STATS_SECT_ENTRY(rx_crc_err) |
| STATS_SECT_ENTRY(rx_late) |
| STATS_SECT_ENTRY(radio_state_errs) |
| STATS_SECT_ENTRY(rx_hw_err) |
| STATS_SECT_ENTRY(tx_hw_err) |
| STATS_SECT_END |
| STATS_SECT_DECL(ble_phy_stats) ble_phy_stats; |
| |
| STATS_NAME_START(ble_phy_stats) |
| STATS_NAME(ble_phy_stats, phy_isrs) |
| STATS_NAME(ble_phy_stats, tx_good) |
| STATS_NAME(ble_phy_stats, tx_fail) |
| STATS_NAME(ble_phy_stats, tx_late) |
| STATS_NAME(ble_phy_stats, tx_bytes) |
| STATS_NAME(ble_phy_stats, rx_starts) |
| STATS_NAME(ble_phy_stats, rx_aborts) |
| STATS_NAME(ble_phy_stats, rx_valid) |
| STATS_NAME(ble_phy_stats, rx_crc_err) |
| STATS_NAME(ble_phy_stats, rx_late) |
| STATS_NAME(ble_phy_stats, radio_state_errs) |
| STATS_NAME(ble_phy_stats, rx_hw_err) |
| STATS_NAME(ble_phy_stats, tx_hw_err) |
| STATS_NAME_END(ble_phy_stats) |
| |
| /* |
| * NOTE: |
| * Tested the following to see what would happen: |
| * -> NVIC has radio irq enabled (interrupt # 1, mask 0x2). |
| * -> Set up nrf to receive. Clear ADDRESS event register. |
| * -> Enable ADDRESS interrupt on nrf5 by writing to INTENSET. |
| * -> Enable RX. |
| * -> Disable interrupts globally using OS_ENTER_CRITICAL(). |
| * -> Wait until a packet is received and the ADDRESS event occurs. |
| * -> Call ble_phy_disable(). |
| * |
| * At this point I wanted to see the state of the cortex NVIC. The IRQ |
| * pending bit was TRUE for the radio interrupt (as expected) as we never |
| * serviced the radio interrupt (interrupts were disabled). |
| * |
| * What was unexpected was this: without clearing the pending IRQ in the NVIC, |
| * when radio interrupts were re-enabled (address event bit in INTENSET set to |
| * 1) and the radio ADDRESS event register read 1 (it was never cleared after |
| * the first address event), the radio did not enter the ISR! I would have |
| * expected that if the following were true, an interrupt would occur: |
| * -> NVIC ISER bit set to TRUE |
| * -> NVIC ISPR bit reads TRUE, meaning interrupt is pending. |
| * -> Radio peripheral interrupts are enabled for some event (or events). |
| * -> Corresponding event register(s) in radio peripheral read 1. |
| * |
| * Not sure what the end result of all this is. We will clear the pending |
| * bit in the NVIC just to be sure when we disable the PHY. |
| */ |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| |
| /* |
| * Per nordic, the number of bytes needed for scratch is 16 + MAX_PKT_SIZE. |
| * However, when I used a smaller size it still overwrote the scratchpad. Until |
| * I figure this out I am just going to allocate 67 words so we have enough |
| * space for 267 bytes of scratch. I used 268 bytes since not sure if this |
| * needs to be aligned and burning a byte is no big deal. |
| */ |
| //#define NRF_ENC_SCRATCH_WORDS (((MYNEWT_VAL(BLE_LL_MAX_PKT_SIZE) + 16) + 3) / 4) |
| #define NRF_ENC_SCRATCH_WORDS (67) |
| |
| uint32_t g_nrf_encrypt_scratchpad[NRF_ENC_SCRATCH_WORDS]; |
| |
| struct nrf_ccm_data |
| { |
| uint8_t key[16]; |
| uint64_t pkt_counter; |
| uint8_t dir_bit; |
| uint8_t iv[8]; |
| } __attribute__((packed)); |
| |
| struct nrf_ccm_data g_nrf_ccm_data; |
| #endif |
| |
| static void |
| ble_phy_apply_errata_102_106_107(void) |
| { |
| /* [102] RADIO: PAYLOAD/END events delayed or not triggered after ADDRESS |
| * [106] RADIO: Higher CRC error rates for some access addresses |
| * [107] RADIO: Immediate address match for access addresses containing MSBs 0x00 |
| */ |
| *(volatile uint32_t *)0x40001774 = ((*(volatile uint32_t *)0x40001774) & |
| 0xfffffffe) | 0x01000000; |
| } |
| |
| #if (BLE_LL_BT5_PHY_SUPPORTED == 1) |
| |
| /* Packet start offset (in usecs). This is the preamble plus access address. |
| * For LE Coded PHY this also includes CI and TERM1. */ |
| uint32_t |
| ble_phy_mode_pdu_start_off(int phy_mode) |
| { |
| return g_ble_phy_mode_pkt_start_off[phy_mode]; |
| } |
| |
| #if NRF52840_XXAA |
| static inline bool |
| ble_phy_mode_is_coded(uint8_t phy_mode) |
| { |
| return (phy_mode == BLE_PHY_MODE_CODED_125KBPS) || |
| (phy_mode == BLE_PHY_MODE_CODED_500KBPS); |
| } |
| |
| static void |
| ble_phy_apply_nrf52840_errata(uint8_t new_phy_mode) |
| { |
| bool new_coded = ble_phy_mode_is_coded(new_phy_mode); |
| bool cur_coded = ble_phy_mode_is_coded(g_ble_phy_data.phy_cur_phy_mode); |
| |
| /* |
| * Workarounds should be applied only when switching to/from LE Coded PHY |
| * so no need to apply them every time. |
| * |
| * nRF52840 Engineering A Errata v1.2 |
| * [164] RADIO: Low sensitivity in long range mode |
| * |
| * nRF52840 Rev 1 Errata |
| * [191] RADIO: High packet error rate in BLE Long Range mode |
| */ |
| if (new_coded == cur_coded) { |
| return; |
| } |
| |
| if (new_coded) { |
| #if MYNEWT_VAL(BLE_PHY_NRF52840_ERRATA_164) |
| /* [164] */ |
| *(volatile uint32_t *)0x4000173C |= 0x80000000; |
| *(volatile uint32_t *)0x4000173C = |
| ((*(volatile uint32_t *)0x4000173C & 0xFFFFFF00) | 0x5C); |
| #endif |
| #if MYNEWT_VAL(BLE_PHY_NRF52840_ERRATA_191) |
| /* [191] */ |
| *(volatile uint32_t *) 0x40001740 = |
| ((*((volatile uint32_t *) 0x40001740)) & 0x7FFF00FF) | |
| 0x80000000 | (((uint32_t)(196)) << 8); |
| #endif |
| } else { |
| #if MYNEWT_VAL(BLE_PHY_NRF52840_ERRATA_164) |
| /* [164] */ |
| *(volatile uint32_t *)0x4000173C &= ~0x80000000; |
| #endif |
| #if MYNEWT_VAL(BLE_PHY_NRF52840_ERRATA_191) |
| /* [191] */ |
| *(volatile uint32_t *) 0x40001740 = |
| ((*((volatile uint32_t *) 0x40001740)) & 0x7FFFFFFF); |
| #endif |
| } |
| } |
| #endif |
| |
| void |
| ble_phy_mode_set(uint8_t new_phy_mode, uint8_t txtorx_phy_mode) |
| { |
| if (new_phy_mode == g_ble_phy_data.phy_cur_phy_mode) { |
| g_ble_phy_data.phy_txtorx_phy_mode = txtorx_phy_mode; |
| return; |
| } |
| |
| #if NRF52840_XXAA |
| ble_phy_apply_nrf52840_errata(new_phy_mode); |
| #endif |
| |
| switch (new_phy_mode) { |
| case BLE_PHY_MODE_1M: |
| NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_1Mbit; |
| NRF_RADIO->PCNF0 = NRF_PCNF0_1M; |
| break; |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_2M_PHY) |
| case BLE_PHY_MODE_2M: |
| NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_2Mbit; |
| NRF_RADIO->PCNF0 = NRF_PCNF0_2M; |
| break; |
| #endif |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_CODED_PHY) |
| case BLE_PHY_MODE_CODED_125KBPS: |
| NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_LR125Kbit; |
| NRF_RADIO->PCNF0 = NRF_PCNF0_CODED; |
| break; |
| case BLE_PHY_MODE_CODED_500KBPS: |
| NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_LR500Kbit; |
| NRF_RADIO->PCNF0 = NRF_PCNF0_CODED; |
| break; |
| #endif |
| default: |
| assert(0); |
| } |
| |
| g_ble_phy_data.phy_cur_phy_mode = new_phy_mode; |
| g_ble_phy_data.phy_txtorx_phy_mode = txtorx_phy_mode; |
| } |
| #endif |
| |
| int |
| ble_phy_get_cur_phy(void) |
| { |
| #if (BLE_LL_BT5_PHY_SUPPORTED == 1) |
| switch (g_ble_phy_data.phy_cur_phy_mode) { |
| case BLE_PHY_MODE_1M: |
| return BLE_PHY_1M; |
| case BLE_PHY_MODE_2M: |
| return BLE_PHY_2M; |
| case BLE_PHY_MODE_CODED_125KBPS: |
| case BLE_PHY_MODE_CODED_500KBPS: |
| return BLE_PHY_CODED; |
| default: |
| assert(0); |
| return -1; |
| } |
| #else |
| return BLE_PHY_1M; |
| #endif |
| } |
| |
| /** |
| * Copies the data from the phy receive buffer into a mbuf chain. |
| * |
| * @param dptr Pointer to receive buffer |
| * @param rxpdu Pointer to already allocated mbuf chain |
| * |
| * NOTE: the packet header already has the total mbuf length in it. The |
| * lengths of the individual mbufs are not set prior to calling. |
| * |
| */ |
| void |
| ble_phy_rxpdu_copy(uint8_t *dptr, struct os_mbuf *rxpdu) |
| { |
| uint16_t rem_bytes; |
| uint16_t mb_bytes; |
| uint16_t copylen; |
| uint32_t *dst; |
| uint32_t *src; |
| struct os_mbuf *m; |
| struct ble_mbuf_hdr *ble_hdr; |
| struct os_mbuf_pkthdr *pkthdr; |
| |
| /* Better be aligned */ |
| assert(((uint32_t)dptr & 3) == 0); |
| |
| pkthdr = OS_MBUF_PKTHDR(rxpdu); |
| rem_bytes = pkthdr->omp_len; |
| |
| /* Fill in the mbuf pkthdr first. */ |
| dst = (uint32_t *)(rxpdu->om_data); |
| src = (uint32_t *)dptr; |
| |
| mb_bytes = (rxpdu->om_omp->omp_databuf_len - rxpdu->om_pkthdr_len - 4); |
| copylen = min(mb_bytes, rem_bytes); |
| copylen &= 0xFFFC; |
| rem_bytes -= copylen; |
| mb_bytes -= copylen; |
| rxpdu->om_len = copylen; |
| while (copylen > 0) { |
| *dst = *src; |
| ++dst; |
| ++src; |
| copylen -= 4; |
| } |
| |
| /* Copy remaining bytes */ |
| m = rxpdu; |
| while (rem_bytes > 0) { |
| /* If there are enough bytes in the mbuf, copy them and leave */ |
| if (rem_bytes <= mb_bytes) { |
| memcpy(m->om_data + m->om_len, src, rem_bytes); |
| m->om_len += rem_bytes; |
| break; |
| } |
| |
| m = SLIST_NEXT(m, om_next); |
| assert(m != NULL); |
| |
| mb_bytes = m->om_omp->omp_databuf_len; |
| copylen = min(mb_bytes, rem_bytes); |
| copylen &= 0xFFFC; |
| rem_bytes -= copylen; |
| mb_bytes -= copylen; |
| m->om_len = copylen; |
| dst = (uint32_t *)m->om_data; |
| while (copylen > 0) { |
| *dst = *src; |
| ++dst; |
| ++src; |
| copylen -= 4; |
| } |
| } |
| |
| /* Copy ble header */ |
| ble_hdr = BLE_MBUF_HDR_PTR(rxpdu); |
| memcpy(ble_hdr, &g_ble_phy_data.rxhdr, sizeof(struct ble_mbuf_hdr)); |
| } |
| |
| /** |
| * Called when we want to wait if the radio is in either the rx or tx |
| * disable states. We want to wait until that state is over before doing |
| * anything to the radio |
| */ |
| static void |
| nrf_wait_disabled(void) |
| { |
| uint32_t state; |
| |
| state = NRF_RADIO->STATE; |
| if (state != RADIO_STATE_STATE_Disabled) { |
| if ((state == RADIO_STATE_STATE_RxDisable) || |
| (state == RADIO_STATE_STATE_TxDisable)) { |
| /* This will end within a short time (6 usecs). Just poll */ |
| while (NRF_RADIO->STATE == state) { |
| /* If this fails, something is really wrong. Should last |
| * no more than 6 usecs */ |
| } |
| } |
| } |
| } |
| |
| /** |
| * |
| * |
| */ |
| static int |
| ble_phy_set_start_time(uint32_t cputime, uint8_t rem_usecs, bool tx) |
| { |
| uint32_t next_cc; |
| uint32_t cur_cc; |
| uint32_t cntr; |
| uint32_t delta; |
| |
| /* |
| * We need to adjust start time to include radio ramp-up and TX pipeline |
| * delay (the latter only if applicable, so only for TX). |
| * |
| * Radio ramp-up time is 40 usecs and TX delay is 3 or 5 usecs depending on |
| * phy, thus we'll offset RTC by 2 full ticks (61 usecs) and then compensate |
| * using TIMER0 with 1 usec precision. |
| */ |
| |
| cputime -= 2; |
| rem_usecs += 61; |
| if (tx) { |
| rem_usecs -= BLE_PHY_T_TXENFAST; |
| rem_usecs -= g_ble_phy_t_txdelay[g_ble_phy_data.phy_cur_phy_mode]; |
| } else { |
| rem_usecs -= BLE_PHY_T_RXENFAST; |
| } |
| |
| /* |
| * rem_usecs will be no more than 2 ticks, but if it is more than single |
| * tick then we should better count one more low-power tick rather than |
| * 30 high-power usecs. Also make sure we don't set TIMER0 CC to 0 as the |
| * compare won't occur. |
| */ |
| |
| if (rem_usecs > 30) { |
| cputime++; |
| rem_usecs -= 30; |
| } |
| |
| /* |
| * Can we set the RTC compare to start TIMER0? We can do it if: |
| * a) Current compare value is not N+1 or N+2 ticks from current |
| * counter. |
| * b) The value we want to set is not at least N+2 from current |
| * counter. |
| * |
| * NOTE: since the counter can tick 1 while we do these calculations we |
| * need to account for it. |
| */ |
| next_cc = cputime & 0xffffff; |
| cur_cc = NRF_RTC0->CC[0]; |
| cntr = NRF_RTC0->COUNTER; |
| |
| delta = (cur_cc - cntr) & 0xffffff; |
| if ((delta <= 3) && (delta != 0)) { |
| return -1; |
| } |
| delta = (next_cc - cntr) & 0xffffff; |
| if ((delta & 0x800000) || (delta < 3)) { |
| return -1; |
| } |
| |
| /* Clear and set TIMER0 to fire off at proper time */ |
| NRF_TIMER0->TASKS_CLEAR = 1; |
| NRF_TIMER0->CC[0] = rem_usecs; |
| NRF_TIMER0->EVENTS_COMPARE[0] = 0; |
| |
| /* Set RTC compare to start TIMER0 */ |
| NRF_RTC0->EVENTS_COMPARE[0] = 0; |
| NRF_RTC0->CC[0] = next_cc; |
| NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk; |
| |
| /* Enable PPI */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH31_Msk; |
| |
| /* Store the cputime at which we set the RTC */ |
| g_ble_phy_data.phy_start_cputime = cputime; |
| |
| return 0; |
| } |
| |
| static int |
| ble_phy_set_start_now(void) |
| { |
| uint32_t cntr; |
| |
| /* Read current RTC0 state */ |
| cntr = NRF_RTC0->COUNTER; |
| |
| /* |
| * Set TIMER0 to fire immediately. We can't set CC to 0 as compare will not |
| * occur in such case. |
| */ |
| NRF_TIMER0->TASKS_CLEAR = 1; |
| NRF_TIMER0->CC[0] = 1; |
| NRF_TIMER0->EVENTS_COMPARE[0] = 0; |
| |
| /* |
| * Set RTC compare to start TIMER0. We need to set it to at least N+2 ticks |
| * from current value to guarantee triggering compare event, but let's set |
| * it to N+3 to account for possible extra tick on RTC0 during these |
| * operations. |
| */ |
| NRF_RTC0->EVENTS_COMPARE[0] = 0; |
| NRF_RTC0->CC[0] = cntr + 3; |
| NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk; |
| |
| /* Enable PPI */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH31_Msk; |
| |
| /* |
| * Store the cputime at which we set the RTC |
| * |
| * XXX Compare event may be triggered on previous CC value (if it was set to |
| * less than N+2) so in rare cases actual start time may be 2 ticks earlier |
| * than what we expect. Since this is only used on RX, it may cause AUX scan |
| * to be scheduled 1 or 2 ticks too late so we'll miss it - it's acceptable |
| * for now. |
| */ |
| g_ble_phy_data.phy_start_cputime = cntr + 3; |
| |
| return 0; |
| } |
| |
| /** |
| * Function is used to set PPI so that we can time out waiting for a reception |
| * to occur. This happens for two reasons: we have sent a packet and we are |
| * waiting for a respons (txrx should be set to ENABLE_TXRX) or we are |
| * starting a connection event and we are a slave and we are waiting for the |
| * master to send us a packet (txrx should be set to ENABLE_RX). |
| * |
| * NOTE: when waiting for a txrx turn-around, wfr_usecs is not used as there |
| * is no additional time to wait; we know when we should receive the address of |
| * the received frame. |
| * |
| * @param txrx Flag denoting if this wfr is a txrx turn-around or not. |
| * @param tx_phy_mode phy mode for last TX (only valid for TX->RX) |
| * @param wfr_usecs Amount of usecs to wait. |
| */ |
| void |
| ble_phy_wfr_enable(int txrx, uint8_t tx_phy_mode, uint32_t wfr_usecs) |
| { |
| uint32_t end_time; |
| uint8_t phy; |
| |
| phy = g_ble_phy_data.phy_cur_phy_mode; |
| |
| if (txrx == BLE_PHY_WFR_ENABLE_TXRX) { |
| /* RX shall start exactly T_IFS after TX end captured in CC[2] */ |
| end_time = NRF_TIMER0->CC[2] + BLE_LL_IFS; |
| /* Adjust for delay between EVENT_END and actual TX end time */ |
| end_time += g_ble_phy_t_txenddelay[tx_phy_mode]; |
| /* Wait a bit longer due to allowed active clock accuracy */ |
| end_time += 2; |
| /* |
| * It's possible that we'll capture PDU start time at the end of timer |
| * cycle and since wfr expires at the beginning of calculated timer |
| * cycle it can be almost 1 usec too early. Let's compensate for this |
| * by waiting 1 usec more. |
| */ |
| end_time += 1; |
| #if MYNEWT_VAL(BLE_PHY_CODED_RX_IFS_EXTRA_MARGIN) > 0 |
| if ((phy == BLE_PHY_MODE_CODED_125KBPS) || |
| (phy == BLE_PHY_MODE_CODED_500KBPS)) { |
| /* |
| * Some controllers exceed T_IFS when transmitting on coded phy |
| * so let's wait a bit longer to be able to talk to them if this |
| * workaround is enabled. |
| */ |
| end_time += MYNEWT_VAL(BLE_PHY_CODED_RX_IFS_EXTRA_MARGIN); |
| } |
| #endif |
| } else { |
| /* |
| * RX shall start no later than wfr_usecs after RX enabled. |
| * CC[0] is the time of RXEN so adjust for radio ram-up. |
| * Do not add jitter since this is already covered by LL. |
| */ |
| end_time = NRF_TIMER0->CC[0] + BLE_PHY_T_RXENFAST + wfr_usecs; |
| } |
| |
| /* |
| * Note: on LE Coded EVENT_ADDRESS is fired after TERM1 is received, so |
| * we are actually calculating relative to start of packet payload |
| * which is fine. |
| */ |
| |
| /* Adjust for receiving access address since this triggers EVENT_ADDRESS */ |
| end_time += ble_phy_mode_pdu_start_off(phy); |
| /* Adjust for delay between actual access address RX and EVENT_ADDRESS */ |
| end_time += g_ble_phy_t_rxaddrdelay[phy]; |
| |
| /* wfr_secs is the time from rxen until timeout */ |
| NRF_TIMER0->CC[3] = end_time; |
| NRF_TIMER0->EVENTS_COMPARE[3] = 0; |
| |
| /* Enable wait for response PPI */ |
| NRF_PPI->CHENSET = (PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk); |
| |
| /* Enable the disabled interrupt so we time out on events compare */ |
| NRF_RADIO->INTENSET = RADIO_INTENSET_DISABLED_Msk; |
| |
| /* |
| * It may happen that if CPU is halted for a brief moment (e.g. during flash |
| * erase or write), TIMER0 already counted past CC[3] and thus wfr will not |
| * fire as expected. In case this happened, let's just disable PPIs for wfr |
| * and trigger wfr manually (i.e. disable radio). |
| * |
| * Note that the same applies to RX start time set in CC[0] but since it |
| * should fire earlier than wfr, fixing wfr is enough. |
| * |
| * CC[1] is only used as a reference on RX start, we do not need it here so |
| * it can be used to read TIMER0 counter. |
| */ |
| NRF_TIMER0->TASKS_CAPTURE[1] = 1; |
| if (NRF_TIMER0->CC[1] > NRF_TIMER0->CC[3]) { |
| NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk; |
| NRF_RADIO->TASKS_DISABLE = 1; |
| } |
| } |
| |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) |
| static uint32_t |
| ble_phy_get_ccm_datarate(void) |
| { |
| #if BLE_LL_BT5_PHY_SUPPORTED |
| switch (g_ble_phy_data.phy_cur_phy_mode) { |
| case BLE_PHY_MODE_1M: |
| return CCM_MODE_DATARATE_1Mbit << CCM_MODE_DATARATE_Pos; |
| case BLE_PHY_MODE_2M: |
| return CCM_MODE_DATARATE_2Mbit << CCM_MODE_DATARATE_Pos; |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_CODED_PHY) |
| case BLE_PHY_MODE_CODED_125KBPS: |
| return CCM_MODE_DATARATE_125Kbps << CCM_MODE_DATARATE_Pos; |
| case BLE_PHY_MODE_CODED_500KBPS: |
| return CCM_MODE_DATARATE_500Kbps << CCM_MODE_DATARATE_Pos; |
| #endif |
| } |
| |
| assert(0); |
| return 0; |
| #else |
| return CCM_MODE_DATARATE_1Mbit << CCM_MODE_DATARATE_Pos; |
| #endif |
| } |
| #endif |
| |
| /** |
| * Setup transceiver for receive. |
| */ |
| static void |
| ble_phy_rx_xcvr_setup(void) |
| { |
| uint8_t *dptr; |
| |
| dptr = (uint8_t *)&g_ble_phy_rx_buf[0]; |
| dptr += 3; |
| |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) |
| if (g_ble_phy_data.phy_encrypted) { |
| NRF_RADIO->PACKETPTR = (uint32_t)&g_ble_phy_enc_buf[0]; |
| NRF_CCM->INPTR = (uint32_t)&g_ble_phy_enc_buf[0]; |
| NRF_CCM->OUTPTR = (uint32_t)dptr; |
| NRF_CCM->SCRATCHPTR = (uint32_t)&g_nrf_encrypt_scratchpad[0]; |
| NRF_CCM->MODE = CCM_MODE_LENGTH_Msk | CCM_MODE_MODE_Decryption | |
| ble_phy_get_ccm_datarate(); |
| NRF_CCM->CNFPTR = (uint32_t)&g_nrf_ccm_data; |
| NRF_CCM->SHORTS = 0; |
| NRF_CCM->EVENTS_ERROR = 0; |
| NRF_CCM->EVENTS_ENDCRYPT = 0; |
| NRF_CCM->TASKS_KSGEN = 1; |
| NRF_PPI->CHENSET = PPI_CHEN_CH25_Msk; |
| } else { |
| NRF_RADIO->PACKETPTR = (uint32_t)dptr; |
| } |
| #else |
| NRF_RADIO->PACKETPTR = (uint32_t)dptr; |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| if (g_ble_phy_data.phy_privacy) { |
| NRF_AAR->ENABLE = AAR_ENABLE_ENABLE_Enabled; |
| NRF_AAR->IRKPTR = (uint32_t)&g_nrf_irk_list[0]; |
| NRF_AAR->SCRATCHPTR = (uint32_t)&g_ble_phy_data.phy_aar_scratch; |
| NRF_AAR->EVENTS_END = 0; |
| NRF_AAR->EVENTS_RESOLVED = 0; |
| NRF_AAR->EVENTS_NOTRESOLVED = 0; |
| } else { |
| if (g_ble_phy_data.phy_encrypted == 0) { |
| NRF_AAR->ENABLE = AAR_ENABLE_ENABLE_Disabled; |
| } |
| } |
| #endif |
| |
| /* Turn off trigger TXEN on output compare match and AAR on bcmatch */ |
| NRF_PPI->CHENCLR = PPI_CHEN_CH20_Msk | PPI_CHEN_CH23_Msk; |
| |
| /* Reset the rx started flag. Used for the wait for response */ |
| g_ble_phy_data.phy_rx_started = 0; |
| g_ble_phy_data.phy_state = BLE_PHY_STATE_RX; |
| |
| #if BLE_LL_BT5_PHY_SUPPORTED |
| /* |
| * On Coded PHY there are CI and TERM1 fields before PDU starts so we need |
| * to take this into account when setting up BCC. |
| */ |
| if (g_ble_phy_data.phy_cur_phy_mode == BLE_PHY_MODE_CODED_125KBPS || |
| g_ble_phy_data.phy_cur_phy_mode == BLE_PHY_MODE_CODED_500KBPS) { |
| g_ble_phy_data.phy_bcc_offset = 5; |
| } else { |
| g_ble_phy_data.phy_bcc_offset = 0; |
| } |
| #else |
| g_ble_phy_data.phy_bcc_offset = 0; |
| #endif |
| |
| /* I want to know when 1st byte received (after address) */ |
| NRF_RADIO->BCC = 8 + g_ble_phy_data.phy_bcc_offset; /* in bits */ |
| NRF_RADIO->EVENTS_ADDRESS = 0; |
| NRF_RADIO->EVENTS_DEVMATCH = 0; |
| NRF_RADIO->EVENTS_BCMATCH = 0; |
| NRF_RADIO->EVENTS_RSSIEND = 0; |
| NRF_RADIO->EVENTS_CRCOK = 0; |
| NRF_RADIO->SHORTS = RADIO_SHORTS_END_DISABLE_Msk | |
| RADIO_SHORTS_READY_START_Msk | |
| RADIO_SHORTS_ADDRESS_BCSTART_Msk | |
| RADIO_SHORTS_ADDRESS_RSSISTART_Msk | |
| RADIO_SHORTS_DISABLED_RSSISTOP_Msk; |
| |
| NRF_RADIO->INTENSET = RADIO_INTENSET_ADDRESS_Msk; |
| } |
| |
| /** |
| * Called from interrupt context when the transmit ends |
| * |
| */ |
| static void |
| ble_phy_tx_end_isr(void) |
| { |
| #if (BLE_LL_BT5_PHY_SUPPORTED == 1) |
| int phy; |
| #endif |
| uint8_t tx_phy_mode; |
| uint8_t was_encrypted; |
| uint8_t transition; |
| uint32_t rx_time; |
| uint32_t wfr_time; |
| |
| /* Store PHY on which we've just transmitted smth */ |
| tx_phy_mode = g_ble_phy_data.phy_cur_phy_mode; |
| |
| /* If this transmission was encrypted we need to remember it */ |
| was_encrypted = g_ble_phy_data.phy_encrypted; |
| (void)was_encrypted; |
| |
| /* Better be in TX state! */ |
| assert(g_ble_phy_data.phy_state == BLE_PHY_STATE_TX); |
| |
| /* Clear events and clear interrupt on disabled event */ |
| NRF_RADIO->EVENTS_DISABLED = 0; |
| NRF_RADIO->INTENCLR = RADIO_INTENCLR_DISABLED_Msk; |
| NRF_RADIO->EVENTS_END = 0; |
| wfr_time = NRF_RADIO->SHORTS; |
| (void)wfr_time; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| /* |
| * XXX: not sure what to do. We had a HW error during transmission. |
| * For now I just count a stat but continue on like all is good. |
| */ |
| if (was_encrypted) { |
| if (NRF_CCM->EVENTS_ERROR) { |
| STATS_INC(ble_phy_stats, tx_hw_err); |
| NRF_CCM->EVENTS_ERROR = 0; |
| } |
| } |
| #endif |
| |
| /* Call transmit end callback */ |
| if (g_ble_phy_data.txend_cb) { |
| g_ble_phy_data.txend_cb(g_ble_phy_data.txend_arg); |
| } |
| |
| transition = g_ble_phy_data.phy_transition; |
| if (transition == BLE_PHY_TRANSITION_TX_RX) { |
| |
| #if (BLE_LL_BT5_PHY_SUPPORTED == 1) |
| /* See if a new phy has been specified for tx to rx transition */ |
| phy = g_ble_phy_data.phy_txtorx_phy_mode; |
| if (phy != g_ble_phy_data.phy_cur_phy_mode) { |
| ble_phy_mode_set(phy, phy); |
| } |
| #endif |
| |
| /* Packet pointer needs to be reset. */ |
| ble_phy_rx_xcvr_setup(); |
| |
| ble_phy_wfr_enable(BLE_PHY_WFR_ENABLE_TXRX, tx_phy_mode, 0); |
| |
| /* Schedule RX exactly T_IFS after TX end captured in CC[2] */ |
| rx_time = NRF_TIMER0->CC[2] + BLE_LL_IFS; |
| /* Adjust for delay between EVENT_END and actual TX end time */ |
| rx_time += g_ble_phy_t_txenddelay[tx_phy_mode]; |
| /* Adjust for radio ramp-up */ |
| rx_time -= BLE_PHY_T_RXENFAST; |
| /* Start listening a bit earlier due to allowed active clock accuracy */ |
| rx_time -= 2; |
| |
| NRF_TIMER0->CC[0] = rx_time; |
| NRF_TIMER0->EVENTS_COMPARE[0] = 0; |
| NRF_PPI->CHENSET = PPI_CHEN_CH21_Msk; |
| } else { |
| /* |
| * XXX: not sure we need to stop the timer here all the time. Or that |
| * it should be stopped here. |
| */ |
| NRF_TIMER0->TASKS_STOP = 1; |
| NRF_TIMER0->TASKS_SHUTDOWN = 1; |
| NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk | |
| PPI_CHEN_CH20_Msk | PPI_CHEN_CH31_Msk; |
| assert(transition == BLE_PHY_TRANSITION_NONE); |
| } |
| } |
| |
| static inline uint8_t |
| ble_phy_get_cur_rx_phy_mode(void) |
| { |
| uint8_t phy; |
| |
| phy = g_ble_phy_data.phy_cur_phy_mode; |
| |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_CODED_PHY) |
| /* |
| * For Coded PHY mode can be set to either codings since actual coding is |
| * set in packet header. However, here we need actual coding of received |
| * packet as this determines pipeline delays so need to figure this out |
| * using CI field. |
| */ |
| if ((phy == BLE_PHY_MODE_CODED_125KBPS) || |
| (phy == BLE_PHY_MODE_CODED_500KBPS)) { |
| phy = NRF_RADIO->PDUSTAT & RADIO_PDUSTAT_CISTAT_Msk ? |
| BLE_PHY_MODE_CODED_500KBPS : |
| BLE_PHY_MODE_CODED_125KBPS; |
| } |
| #endif |
| |
| return phy; |
| } |
| |
| static void |
| ble_phy_rx_end_isr(void) |
| { |
| int rc; |
| uint8_t *dptr; |
| uint8_t crcok; |
| uint32_t tx_time; |
| struct ble_mbuf_hdr *ble_hdr; |
| |
| /* Clear events and clear interrupt */ |
| NRF_RADIO->EVENTS_END = 0; |
| NRF_RADIO->INTENCLR = RADIO_INTENCLR_END_Msk; |
| |
| /* Disable automatic RXEN */ |
| NRF_PPI->CHENCLR = PPI_CHEN_CH21_Msk; |
| |
| /* Set RSSI and CRC status flag in header */ |
| ble_hdr = &g_ble_phy_data.rxhdr; |
| assert(NRF_RADIO->EVENTS_RSSIEND != 0); |
| ble_hdr->rxinfo.rssi = (-1 * NRF_RADIO->RSSISAMPLE) + |
| g_ble_phy_data.rx_pwr_compensation; |
| |
| dptr = (uint8_t *)&g_ble_phy_rx_buf[0]; |
| dptr += 3; |
| |
| /* Count PHY crc errors and valid packets */ |
| crcok = NRF_RADIO->EVENTS_CRCOK; |
| if (!crcok) { |
| STATS_INC(ble_phy_stats, rx_crc_err); |
| } else { |
| STATS_INC(ble_phy_stats, rx_valid); |
| ble_hdr->rxinfo.flags |= BLE_MBUF_HDR_F_CRC_OK; |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| if (g_ble_phy_data.phy_encrypted) { |
| /* Only set MIC failure flag if frame is not zero length */ |
| if ((dptr[1] != 0) && (NRF_CCM->MICSTATUS == 0)) { |
| ble_hdr->rxinfo.flags |= BLE_MBUF_HDR_F_MIC_FAILURE; |
| } |
| |
| /* |
| * XXX: not sure how to deal with this. This should not |
| * be a MIC failure but we should not hand it up. I guess |
| * this is just some form of rx error and that is how we |
| * handle it? For now, just set CRC error flags |
| */ |
| if (NRF_CCM->EVENTS_ERROR) { |
| STATS_INC(ble_phy_stats, rx_hw_err); |
| ble_hdr->rxinfo.flags &= ~BLE_MBUF_HDR_F_CRC_OK; |
| } |
| |
| /* |
| * XXX: This is a total hack work-around for now but I dont |
| * know what else to do. If ENDCRYPT is not set and we are |
| * encrypted we need to not trust this frame and drop it. |
| */ |
| if (NRF_CCM->EVENTS_ENDCRYPT == 0) { |
| STATS_INC(ble_phy_stats, rx_hw_err); |
| ble_hdr->rxinfo.flags &= ~BLE_MBUF_HDR_F_CRC_OK; |
| } |
| } |
| #endif |
| } |
| |
| /* |
| * Let's schedule TX now and we will just cancel it after processing RXed |
| * packet if we don't need TX. |
| * |
| * We need this to initiate connection in case AUX_CONNECT_REQ was sent on |
| * LE Coded S8. In this case the time we process RXed packet is roughly the |
| * same as the limit when we need to have TX scheduled (i.e. TIMER0 and PPI |
| * armed) so we may simply miss the slot and set the timer in the past. |
| * |
| * When TX is scheduled in advance, we may event process packet a bit longer |
| * during radio ramp-up - this gives us extra 40 usecs which is more than |
| * enough. |
| */ |
| |
| /* Schedule TX exactly T_IFS after RX end captured in CC[2] */ |
| tx_time = NRF_TIMER0->CC[2] + BLE_LL_IFS; |
| /* Adjust for delay between actual RX end time and EVENT_END */ |
| tx_time -= g_ble_phy_t_rxenddelay[ble_hdr->rxinfo.phy_mode]; |
| /* Adjust for radio ramp-up */ |
| tx_time -= BLE_PHY_T_TXENFAST; |
| /* Adjust for delay between EVENT_READY and actual TX start time */ |
| /* XXX: we may have asymmetric phy so next phy may be different... */ |
| tx_time -= g_ble_phy_t_txdelay[g_ble_phy_data.phy_cur_phy_mode]; |
| |
| NRF_TIMER0->CC[0] = tx_time; |
| NRF_TIMER0->EVENTS_COMPARE[0] = 0; |
| NRF_PPI->CHENSET = PPI_CHEN_CH20_Msk; |
| |
| /* |
| * XXX: Hack warning! |
| * |
| * It may happen (during flash erase) that CPU is stopped for a moment and |
| * TIMER0 already counted past CC[0]. In such case we will be stuck waiting |
| * for TX to start since EVENTS_COMPARE[0] will not happen any time soon. |
| * For now let's set a flag denoting that we are late in RX-TX transition so |
| * ble_phy_tx() will fail - this allows everything to cleanup nicely without |
| * the need for extra handling in many places. |
| * |
| * Note: CC[3] is used only for wfr which we do not need here. |
| */ |
| NRF_TIMER0->TASKS_CAPTURE[3] = 1; |
| if (NRF_TIMER0->CC[3] > NRF_TIMER0->CC[0]) { |
| NRF_PPI->CHENCLR = PPI_CHEN_CH20_Msk; |
| g_ble_phy_data.phy_transition_late = 1; |
| } |
| |
| /* |
| * XXX: This is a horrible ugly hack to deal with the RAM S1 byte |
| * that is not sent over the air but is present here. Simply move the |
| * data pointer to deal with it. Fix this later. |
| */ |
| dptr[2] = dptr[1]; |
| dptr[1] = dptr[0]; |
| rc = ble_ll_rx_end(dptr + 1, ble_hdr); |
| if (rc < 0) { |
| ble_phy_disable(); |
| } |
| } |
| |
| static bool |
| ble_phy_rx_start_isr(void) |
| { |
| int rc; |
| uint32_t state; |
| uint32_t usecs; |
| uint32_t pdu_usecs; |
| uint32_t ticks; |
| struct ble_mbuf_hdr *ble_hdr; |
| uint8_t *dptr; |
| |
| dptr = (uint8_t *)&g_ble_phy_rx_buf[0]; |
| |
| /* Clear events and clear interrupt */ |
| NRF_RADIO->EVENTS_ADDRESS = 0; |
| |
| /* Clear wfr timer channels and DISABLED interrupt */ |
| NRF_RADIO->INTENCLR = RADIO_INTENCLR_DISABLED_Msk | RADIO_INTENCLR_ADDRESS_Msk; |
| NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk; |
| |
| /* Initialize the ble mbuf header */ |
| ble_hdr = &g_ble_phy_data.rxhdr; |
| ble_hdr->rxinfo.flags = ble_ll_state_get(); |
| ble_hdr->rxinfo.channel = g_ble_phy_data.phy_chan; |
| ble_hdr->rxinfo.handle = 0; |
| ble_hdr->rxinfo.phy = ble_phy_get_cur_phy(); |
| ble_hdr->rxinfo.phy_mode = ble_phy_get_cur_rx_phy_mode(); |
| #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV) |
| ble_hdr->rxinfo.user_data = NULL; |
| #endif |
| |
| /* |
| * Calculate accurate packets start time (with remainder) |
| * |
| * We may start receiving packet somewhere during preamble in which case |
| * it is possible that actual transmission started before TIMER0 was |
| * running - need to take this into account. |
| */ |
| ble_hdr->beg_cputime = g_ble_phy_data.phy_start_cputime; |
| |
| usecs = NRF_TIMER0->CC[1]; |
| pdu_usecs = ble_phy_mode_pdu_start_off(ble_hdr->rxinfo.phy_mode) + |
| g_ble_phy_t_rxaddrdelay[ble_hdr->rxinfo.phy_mode]; |
| if (usecs < pdu_usecs) { |
| g_ble_phy_data.phy_start_cputime--; |
| usecs += 30; |
| } |
| usecs -= pdu_usecs; |
| |
| ticks = os_cputime_usecs_to_ticks(usecs); |
| usecs -= os_cputime_ticks_to_usecs(ticks); |
| if (usecs == 31) { |
| usecs = 0; |
| ++ticks; |
| } |
| |
| ble_hdr->beg_cputime += ticks; |
| ble_hdr->rem_usecs = usecs; |
| |
| /* XXX: I wonder if we always have the 1st byte. If we need to wait for |
| * rx chain delay, it could be 18 usecs from address interrupt. The |
| nrf52 may be able to get here early. */ |
| /* Wait to get 1st byte of frame */ |
| while (1) { |
| state = NRF_RADIO->STATE; |
| if (NRF_RADIO->EVENTS_BCMATCH != 0) { |
| break; |
| } |
| |
| /* |
| * If state is disabled, we should have the BCMATCH. If not, |
| * something is wrong! |
| */ |
| if (state == RADIO_STATE_STATE_Disabled) { |
| NRF_RADIO->INTENCLR = NRF_RADIO_IRQ_MASK_ALL; |
| NRF_RADIO->SHORTS = 0; |
| return false; |
| } |
| } |
| |
| /* Call Link Layer receive start function */ |
| rc = ble_ll_rx_start(dptr + 3, |
| g_ble_phy_data.phy_chan, |
| &g_ble_phy_data.rxhdr); |
| if (rc >= 0) { |
| /* Set rx started flag and enable rx end ISR */ |
| g_ble_phy_data.phy_rx_started = 1; |
| NRF_RADIO->INTENSET = RADIO_INTENSET_END_Msk; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| /* Must start aar if we need to */ |
| if (g_ble_phy_data.phy_privacy) { |
| NRF_RADIO->EVENTS_BCMATCH = 0; |
| NRF_PPI->CHENSET = PPI_CHEN_CH23_Msk; |
| |
| /* |
| * Setup AAR to resolve AdvA and trigger it after complete address |
| * is received, i.e. after PDU header and AdvA is received. |
| * |
| * AdvA starts at 4th octet in receive buffer, after S0, len and S1 |
| * fields. |
| * |
| * In case of extended advertising AdvA is located after extended |
| * header (+2 octets). |
| */ |
| if (BLE_MBUF_HDR_EXT_ADV(&g_ble_phy_data.rxhdr)) { |
| NRF_AAR->ADDRPTR = (uint32_t)(dptr + 5); |
| NRF_RADIO->BCC = (BLE_DEV_ADDR_LEN + BLE_LL_PDU_HDR_LEN + 2) * 8 + |
| g_ble_phy_data.phy_bcc_offset; |
| } else { |
| NRF_AAR->ADDRPTR = (uint32_t)(dptr + 3); |
| NRF_RADIO->BCC = (BLE_DEV_ADDR_LEN + BLE_LL_PDU_HDR_LEN) * 8 + |
| g_ble_phy_data.phy_bcc_offset; |
| } |
| } |
| #endif |
| } else { |
| /* Disable PHY */ |
| ble_phy_disable(); |
| STATS_INC(ble_phy_stats, rx_aborts); |
| } |
| |
| /* Count rx starts */ |
| STATS_INC(ble_phy_stats, rx_starts); |
| |
| return true; |
| } |
| |
| static void |
| ble_phy_isr(void) |
| { |
| uint32_t irq_en; |
| |
| os_trace_isr_enter(); |
| |
| /* Read irq register to determine which interrupts are enabled */ |
| irq_en = NRF_RADIO->INTENCLR; |
| |
| /* |
| * NOTE: order of checking is important! Possible, if things get delayed, |
| * we have both an ADDRESS and DISABLED interrupt in rx state. If we get |
| * an address, we disable the DISABLED interrupt. |
| */ |
| |
| /* We get this if we have started to receive a frame */ |
| if ((irq_en & RADIO_INTENCLR_ADDRESS_Msk) && NRF_RADIO->EVENTS_ADDRESS) { |
| /* |
| * wfr timer is calculated to expire at the exact time we should start |
| * receiving a packet (with 1 usec precision) so it is possible it will |
| * fire at the same time as EVENT_ADDRESS. If this happens, radio will |
| * be disabled while we are waiting for EVENT_BCCMATCH after 1st byte |
| * of payload is received and ble_phy_rx_start_isr() will fail. In this |
| * case we should not clear DISABLED irq mask so it will be handled as |
| * regular radio disabled event below. In other case radio was disabled |
| * on purpose and there's nothing more to handle so we can clear mask. |
| */ |
| if (ble_phy_rx_start_isr()) { |
| irq_en &= ~RADIO_INTENCLR_DISABLED_Msk; |
| } |
| } |
| |
| /* Check for disabled event. This only happens for transmits now */ |
| if ((irq_en & RADIO_INTENCLR_DISABLED_Msk) && NRF_RADIO->EVENTS_DISABLED) { |
| if (g_ble_phy_data.phy_state == BLE_PHY_STATE_RX) { |
| NRF_RADIO->EVENTS_DISABLED = 0; |
| ble_ll_wfr_timer_exp(NULL); |
| } else if (g_ble_phy_data.phy_state == BLE_PHY_STATE_IDLE) { |
| assert(0); |
| } else { |
| ble_phy_tx_end_isr(); |
| } |
| } |
| |
| /* Receive packet end (we dont enable this for transmit) */ |
| if ((irq_en & RADIO_INTENCLR_END_Msk) && NRF_RADIO->EVENTS_END) { |
| ble_phy_rx_end_isr(); |
| } |
| |
| g_ble_phy_data.phy_transition_late = 0; |
| |
| /* Ensures IRQ is cleared */ |
| irq_en = NRF_RADIO->SHORTS; |
| |
| /* Count # of interrupts */ |
| STATS_INC(ble_phy_stats, phy_isrs); |
| |
| os_trace_isr_exit(); |
| } |
| |
| #if MYNEWT_VAL(BLE_PHY_DBG_TIME_TXRXEN_READY_PIN) >= 0 || \ |
| MYNEWT_VAL(BLE_PHY_DBG_TIME_ADDRESS_END_PIN) >= 0 || \ |
| MYNEWT_VAL(BLE_PHY_DBG_TIME_WFR_PIN) >= 0 |
| static inline void |
| ble_phy_dbg_time_setup_gpiote(int index, int pin) |
| { |
| NRF_GPIO_Type *port; |
| |
| #if NRF52840_XXAA |
| port = pin > 31 ? NRF_P1 : NRF_P0; |
| pin &= 0x1f; |
| #else |
| port = NRF_P0; |
| #endif |
| |
| /* Configure GPIO directly to avoid dependency to hal_gpio (for porting) */ |
| port->DIRSET = (1 << pin); |
| port->OUTCLR = (1 << pin); |
| |
| NRF_GPIOTE->CONFIG[index] = |
| (GPIOTE_CONFIG_MODE_Task << GPIOTE_CONFIG_MODE_Pos) | |
| ((pin & 0x1F) << GPIOTE_CONFIG_PSEL_Pos) | |
| #if NRF52840_XXAA |
| ((port == NRF_P1) << GPIOTE_CONFIG_PORT_Pos); |
| #else |
| 0; |
| #endif |
| } |
| #endif |
| |
| static void |
| ble_phy_dbg_time_setup(void) |
| { |
| int gpiote_idx __attribute__((unused)) = 8; |
| |
| /* |
| * We setup GPIOTE starting from last configuration index to minimize risk |
| * of conflict with GPIO setup via hal. It's not great solution, but since |
| * this is just debugging code we can live with this. |
| */ |
| |
| #if MYNEWT_VAL(BLE_PHY_DBG_TIME_TXRXEN_READY_PIN) >= 0 |
| ble_phy_dbg_time_setup_gpiote(--gpiote_idx, |
| MYNEWT_VAL(BLE_PHY_DBG_TIME_TXRXEN_READY_PIN)); |
| |
| NRF_PPI->CH[17].EEP = (uint32_t)&(NRF_RADIO->EVENTS_READY); |
| NRF_PPI->CH[17].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_CLR[gpiote_idx]); |
| NRF_PPI->CHENSET = PPI_CHEN_CH17_Msk; |
| |
| /* CH[20] and PPI CH[21] are on to trigger TASKS_TXEN or TASKS_RXEN */ |
| NRF_PPI->FORK[20].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_SET[gpiote_idx]); |
| NRF_PPI->FORK[21].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_SET[gpiote_idx]); |
| #endif |
| |
| #if MYNEWT_VAL(BLE_PHY_DBG_TIME_ADDRESS_END_PIN) >= 0 |
| ble_phy_dbg_time_setup_gpiote(--gpiote_idx, |
| MYNEWT_VAL(BLE_PHY_DBG_TIME_ADDRESS_END_PIN)); |
| |
| /* CH[26] and CH[27] are always on for EVENT_ADDRESS and EVENT_END */ |
| NRF_PPI->FORK[26].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_SET[gpiote_idx]); |
| NRF_PPI->FORK[27].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_CLR[gpiote_idx]); |
| #endif |
| |
| #if MYNEWT_VAL(BLE_PHY_DBG_TIME_WFR_PIN) >= 0 |
| ble_phy_dbg_time_setup_gpiote(--gpiote_idx, |
| MYNEWT_VAL(BLE_PHY_DBG_TIME_WFR_PIN)); |
| |
| #if NRF52840_XXAA |
| NRF_PPI->CH[18].EEP = (uint32_t)&(NRF_RADIO->EVENTS_RXREADY); |
| #else |
| NRF_PPI->CH[18].EEP = (uint32_t)&(NRF_RADIO->EVENTS_READY); |
| #endif |
| NRF_PPI->CH[18].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_SET[gpiote_idx]); |
| NRF_PPI->CH[19].EEP = (uint32_t)&(NRF_RADIO->EVENTS_DISABLED); |
| NRF_PPI->CH[19].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_CLR[gpiote_idx]); |
| NRF_PPI->CHENSET = PPI_CHEN_CH18_Msk | PPI_CHEN_CH19_Msk; |
| |
| /* CH[4] and CH[5] are always on for wfr */ |
| NRF_PPI->FORK[4].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_CLR[gpiote_idx]); |
| NRF_PPI->FORK[5].TEP = (uint32_t)&(NRF_GPIOTE->TASKS_CLR[gpiote_idx]); |
| #endif |
| } |
| |
| /** |
| * ble phy init |
| * |
| * Initialize the PHY. |
| * |
| * @return int 0: success; PHY error code otherwise |
| */ |
| int |
| ble_phy_init(void) |
| { |
| int rc; |
| |
| /* Default phy to use is 1M */ |
| g_ble_phy_data.phy_cur_phy_mode = BLE_PHY_MODE_1M; |
| g_ble_phy_data.phy_txtorx_phy_mode = BLE_PHY_MODE_1M; |
| |
| g_ble_phy_data.rx_pwr_compensation = 0; |
| |
| #if !defined(BLE_XCVR_RFCLK) |
| /* BLE wants the HFXO on all the time in this case */ |
| ble_phy_rfclk_enable(); |
| |
| /* |
| * XXX: I do not think we need to wait for settling time here since |
| * we will probably not use the radio for longer than the settling time |
| * and it will only degrade performance. Might want to wait here though. |
| */ |
| #endif |
| |
| /* Set phy channel to an invalid channel so first set channel works */ |
| g_ble_phy_data.phy_chan = BLE_PHY_NUM_CHANS; |
| |
| /* Toggle peripheral power to reset (just in case) */ |
| NRF_RADIO->POWER = 0; |
| NRF_RADIO->POWER = 1; |
| |
| /* Disable all interrupts */ |
| NRF_RADIO->INTENCLR = NRF_RADIO_IRQ_MASK_ALL; |
| |
| /* Set configuration registers */ |
| NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_1Mbit; |
| NRF_RADIO->PCNF0 = NRF_PCNF0; |
| |
| /* XXX: should maxlen be 251 for encryption? */ |
| NRF_RADIO->PCNF1 = NRF_MAXLEN | |
| (RADIO_PCNF1_ENDIAN_Little << RADIO_PCNF1_ENDIAN_Pos) | |
| (NRF_BALEN << RADIO_PCNF1_BALEN_Pos) | |
| RADIO_PCNF1_WHITEEN_Msk; |
| |
| /* Enable radio fast ramp-up */ |
| NRF_RADIO->MODECNF0 |= (RADIO_MODECNF0_RU_Fast << RADIO_MODECNF0_RU_Pos) & |
| RADIO_MODECNF0_RU_Msk; |
| |
| /* Set logical address 1 for TX and RX */ |
| NRF_RADIO->TXADDRESS = 0; |
| NRF_RADIO->RXADDRESSES = (1 << 0); |
| |
| /* Configure the CRC registers */ |
| NRF_RADIO->CRCCNF = (RADIO_CRCCNF_SKIPADDR_Skip << RADIO_CRCCNF_SKIPADDR_Pos) | RADIO_CRCCNF_LEN_Three; |
| |
| /* Configure BLE poly */ |
| NRF_RADIO->CRCPOLY = 0x0000065B; |
| |
| /* Configure IFS */ |
| NRF_RADIO->TIFS = BLE_LL_IFS; |
| |
| /* Captures tx/rx start in timer0 cc 1 and tx/rx end in timer0 cc 2 */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH26_Msk | PPI_CHEN_CH27_Msk; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| NRF_CCM->INTENCLR = 0xffffffff; |
| NRF_CCM->SHORTS = CCM_SHORTS_ENDKSGEN_CRYPT_Msk; |
| NRF_CCM->EVENTS_ERROR = 0; |
| memset(g_nrf_encrypt_scratchpad, 0, sizeof(g_nrf_encrypt_scratchpad)); |
| #endif |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| g_ble_phy_data.phy_aar_scratch = 0; |
| NRF_AAR->IRKPTR = (uint32_t)&g_nrf_irk_list[0]; |
| NRF_AAR->INTENCLR = 0xffffffff; |
| NRF_AAR->EVENTS_END = 0; |
| NRF_AAR->EVENTS_RESOLVED = 0; |
| NRF_AAR->EVENTS_NOTRESOLVED = 0; |
| NRF_AAR->NIRK = 0; |
| #endif |
| |
| /* TIMER0 setup for PHY when using RTC */ |
| NRF_TIMER0->TASKS_STOP = 1; |
| NRF_TIMER0->TASKS_SHUTDOWN = 1; |
| NRF_TIMER0->BITMODE = 3; /* 32-bit timer */ |
| NRF_TIMER0->MODE = 0; /* Timer mode */ |
| NRF_TIMER0->PRESCALER = 4; /* gives us 1 MHz */ |
| |
| /* |
| * PPI setup. |
| * Channel 4: Captures TIMER0 in CC[3] when EVENTS_ADDRESS occurs. Used |
| * to cancel the wait for response timer. |
| * Channel 5: TIMER0 CC[3] to TASKS_DISABLE on radio. This is the wait |
| * for response timer. |
| */ |
| NRF_PPI->CH[4].EEP = (uint32_t)&(NRF_RADIO->EVENTS_ADDRESS); |
| NRF_PPI->CH[4].TEP = (uint32_t)&(NRF_TIMER0->TASKS_CAPTURE[3]); |
| NRF_PPI->CH[5].EEP = (uint32_t)&(NRF_TIMER0->EVENTS_COMPARE[3]); |
| NRF_PPI->CH[5].TEP = (uint32_t)&(NRF_RADIO->TASKS_DISABLE); |
| |
| /* Set isr in vector table and enable interrupt */ |
| NVIC_SetPriority(RADIO_IRQn, 0); |
| #if MYNEWT |
| NVIC_SetVector(RADIO_IRQn, (uint32_t)ble_phy_isr); |
| #else |
| ble_npl_hw_set_isr(RADIO_IRQn, ble_phy_isr); |
| #endif |
| NVIC_EnableIRQ(RADIO_IRQn); |
| |
| /* Register phy statistics */ |
| if (!g_ble_phy_data.phy_stats_initialized) { |
| rc = stats_init_and_reg(STATS_HDR(ble_phy_stats), |
| STATS_SIZE_INIT_PARMS(ble_phy_stats, |
| STATS_SIZE_32), |
| STATS_NAME_INIT_PARMS(ble_phy_stats), |
| "ble_phy"); |
| assert(rc == 0); |
| |
| g_ble_phy_data.phy_stats_initialized = 1; |
| } |
| |
| ble_phy_dbg_time_setup(); |
| |
| return 0; |
| } |
| |
| /** |
| * Puts the phy into receive mode. |
| * |
| * @return int 0: success; BLE Phy error code otherwise |
| */ |
| int |
| ble_phy_rx(void) |
| { |
| /* |
| * Check radio state. |
| * |
| * In case radio is now disabling we'll wait for it to finish, but if for |
| * any reason it's just in idle state we proceed with RX as usual since |
| * nRF52 radio can ramp-up from idle state as well. |
| * |
| * Note that TX and RX states values are the same except for 3rd bit so we |
| * can make a shortcut here when checking for idle state. |
| */ |
| nrf_wait_disabled(); |
| if ((NRF_RADIO->STATE != RADIO_STATE_STATE_Disabled) && |
| ((NRF_RADIO->STATE & 0x07) != RADIO_STATE_STATE_RxIdle)) { |
| ble_phy_disable(); |
| STATS_INC(ble_phy_stats, radio_state_errs); |
| return BLE_PHY_ERR_RADIO_STATE; |
| } |
| |
| /* Make sure all interrupts are disabled */ |
| NRF_RADIO->INTENCLR = NRF_RADIO_IRQ_MASK_ALL; |
| |
| /* Clear events prior to enabling receive */ |
| NRF_RADIO->EVENTS_END = 0; |
| NRF_RADIO->EVENTS_DISABLED = 0; |
| |
| /* Setup for rx */ |
| ble_phy_rx_xcvr_setup(); |
| |
| /* PPI to start radio automatically shall be set here */ |
| assert(NRF_PPI->CHEN & PPI_CHEN_CH21_Msk); |
| |
| return 0; |
| } |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| /** |
| * Called to enable encryption at the PHY. Note that this state will persist |
| * in the PHY; in other words, if you call this function you have to call |
| * disable so that future PHY transmits/receives will not be encrypted. |
| * |
| * @param pkt_counter |
| * @param iv |
| * @param key |
| * @param is_master |
| */ |
| void |
| ble_phy_encrypt_enable(uint64_t pkt_counter, uint8_t *iv, uint8_t *key, |
| uint8_t is_master) |
| { |
| memcpy(g_nrf_ccm_data.key, key, 16); |
| g_nrf_ccm_data.pkt_counter = pkt_counter; |
| memcpy(g_nrf_ccm_data.iv, iv, 8); |
| g_nrf_ccm_data.dir_bit = is_master; |
| g_ble_phy_data.phy_encrypted = 1; |
| /* Enable the module (AAR cannot be on while CCM on) */ |
| NRF_AAR->ENABLE = AAR_ENABLE_ENABLE_Disabled; |
| NRF_CCM->ENABLE = CCM_ENABLE_ENABLE_Enabled; |
| } |
| |
| void |
| ble_phy_encrypt_set_pkt_cntr(uint64_t pkt_counter, int dir) |
| { |
| g_nrf_ccm_data.pkt_counter = pkt_counter; |
| g_nrf_ccm_data.dir_bit = dir; |
| } |
| |
| void |
| ble_phy_encrypt_disable(void) |
| { |
| NRF_PPI->CHENCLR = PPI_CHEN_CH25_Msk; |
| NRF_CCM->TASKS_STOP = 1; |
| NRF_CCM->EVENTS_ERROR = 0; |
| NRF_CCM->ENABLE = CCM_ENABLE_ENABLE_Disabled; |
| |
| g_ble_phy_data.phy_encrypted = 0; |
| } |
| #endif |
| |
| void |
| ble_phy_set_txend_cb(ble_phy_tx_end_func txend_cb, void *arg) |
| { |
| /* Set transmit end callback and arg */ |
| g_ble_phy_data.txend_cb = txend_cb; |
| g_ble_phy_data.txend_arg = arg; |
| } |
| |
| /** |
| * Called to set the start time of a transmission. |
| * |
| * This function is called to set the start time when we are not going from |
| * rx to tx automatically. |
| * |
| * NOTE: care must be taken when calling this function. The channel should |
| * already be set. |
| * |
| * @param cputime This is the tick at which the 1st bit of the preamble |
| * should be transmitted |
| * @param rem_usecs This is used only when the underlying timing uses a 32.768 |
| * kHz crystal. It is the # of usecs from the cputime tick |
| * at which the first bit of the preamble should be |
| * transmitted. |
| * @return int |
| */ |
| int |
| ble_phy_tx_set_start_time(uint32_t cputime, uint8_t rem_usecs) |
| { |
| int rc; |
| |
| ble_phy_trace_u32x2(BLE_PHY_TRACE_ID_START_TX, cputime, rem_usecs); |
| |
| /* XXX: This should not be necessary, but paranoia is good! */ |
| /* Clear timer0 compare to RXEN since we are transmitting */ |
| NRF_PPI->CHENCLR = PPI_CHEN_CH21_Msk; |
| |
| if (ble_phy_set_start_time(cputime, rem_usecs, true) != 0) { |
| STATS_INC(ble_phy_stats, tx_late); |
| ble_phy_disable(); |
| rc = BLE_PHY_ERR_TX_LATE; |
| } else { |
| /* Enable PPI to automatically start TXEN */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH20_Msk; |
| rc = 0; |
| } |
| return rc; |
| } |
| |
| /** |
| * Called to set the start time of a reception |
| * |
| * This function acts a bit differently than transmit. If we are late getting |
| * here we will still attempt to receive. |
| * |
| * NOTE: care must be taken when calling this function. The channel should |
| * already be set. |
| * |
| * @param cputime |
| * |
| * @return int |
| */ |
| int |
| ble_phy_rx_set_start_time(uint32_t cputime, uint8_t rem_usecs) |
| { |
| bool late = false; |
| int rc = 0; |
| |
| ble_phy_trace_u32x2(BLE_PHY_TRACE_ID_START_RX, cputime, rem_usecs); |
| |
| /* XXX: This should not be necessary, but paranoia is good! */ |
| /* Clear timer0 compare to TXEN since we are transmitting */ |
| NRF_PPI->CHENCLR = PPI_CHEN_CH20_Msk; |
| |
| if (ble_phy_set_start_time(cputime, rem_usecs, false) != 0) { |
| STATS_INC(ble_phy_stats, rx_late); |
| |
| /* We're late so let's just try to start RX as soon as possible */ |
| ble_phy_set_start_now(); |
| |
| late = true; |
| } |
| |
| /* Enable PPI to automatically start RXEN */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH21_Msk; |
| |
| /* Start rx */ |
| rc = ble_phy_rx(); |
| |
| /* |
| * If we enabled receiver but were late, let's return proper error code so |
| * caller can handle this. |
| */ |
| if (!rc && late) { |
| rc = BLE_PHY_ERR_RX_LATE; |
| } |
| |
| return rc; |
| } |
| |
| int |
| ble_phy_tx(ble_phy_tx_pducb_t pducb, void *pducb_arg, uint8_t end_trans) |
| { |
| int rc; |
| uint8_t *dptr; |
| uint8_t *pktptr; |
| uint8_t payload_len; |
| uint8_t hdr_byte; |
| uint32_t state; |
| uint32_t shortcuts; |
| |
| if (g_ble_phy_data.phy_transition_late) { |
| ble_phy_disable(); |
| STATS_INC(ble_phy_stats, tx_late); |
| return BLE_PHY_ERR_TX_LATE; |
| } |
| |
| /* |
| * This check is to make sure that the radio is not in a state where |
| * it is moving to disabled state. If so, let it get there. |
| */ |
| nrf_wait_disabled(); |
| |
| /* |
| * XXX: Although we may not have to do this here, I clear all the PPI |
| * that should not be used when transmitting. Some of them are only enabled |
| * if encryption and/or privacy is on, but I dont care. Better to be |
| * paranoid, and if you are going to clear one, might as well clear them |
| * all. |
| */ |
| NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk | PPI_CHEN_CH23_Msk | |
| PPI_CHEN_CH25_Msk; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| if (g_ble_phy_data.phy_encrypted) { |
| dptr = (uint8_t *)&g_ble_phy_enc_buf[0]; |
| pktptr = (uint8_t *)&g_ble_phy_tx_buf[0]; |
| NRF_CCM->SHORTS = CCM_SHORTS_ENDKSGEN_CRYPT_Msk; |
| NRF_CCM->INPTR = (uint32_t)dptr; |
| NRF_CCM->OUTPTR = (uint32_t)pktptr; |
| NRF_CCM->SCRATCHPTR = (uint32_t)&g_nrf_encrypt_scratchpad[0]; |
| NRF_CCM->EVENTS_ERROR = 0; |
| NRF_CCM->MODE = CCM_MODE_LENGTH_Msk | ble_phy_get_ccm_datarate(); |
| NRF_CCM->CNFPTR = (uint32_t)&g_nrf_ccm_data; |
| } else { |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| NRF_AAR->IRKPTR = (uint32_t)&g_nrf_irk_list[0]; |
| #endif |
| dptr = (uint8_t *)&g_ble_phy_tx_buf[0]; |
| pktptr = dptr; |
| } |
| #else |
| dptr = (uint8_t *)&g_ble_phy_tx_buf[0]; |
| pktptr = dptr; |
| #endif |
| |
| /* Set PDU payload */ |
| payload_len = pducb(&dptr[3], pducb_arg, &hdr_byte); |
| |
| /* RAM representation has S0, LENGTH and S1 fields. (3 bytes) */ |
| dptr[0] = hdr_byte; |
| dptr[1] = payload_len; |
| dptr[2] = 0; |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1) |
| /* Start key-stream generation and encryption (via short) */ |
| if (g_ble_phy_data.phy_encrypted) { |
| NRF_CCM->TASKS_KSGEN = 1; |
| } |
| #endif |
| |
| NRF_RADIO->PACKETPTR = (uint32_t)pktptr; |
| |
| /* Clear the ready, end and disabled events */ |
| NRF_RADIO->EVENTS_READY = 0; |
| NRF_RADIO->EVENTS_END = 0; |
| NRF_RADIO->EVENTS_DISABLED = 0; |
| |
| /* Enable shortcuts for transmit start/end. */ |
| shortcuts = RADIO_SHORTS_END_DISABLE_Msk | RADIO_SHORTS_READY_START_Msk; |
| NRF_RADIO->SHORTS = shortcuts; |
| NRF_RADIO->INTENSET = RADIO_INTENSET_DISABLED_Msk; |
| |
| /* Set the PHY transition */ |
| g_ble_phy_data.phy_transition = end_trans; |
| |
| /* Set transmitted payload length */ |
| g_ble_phy_data.phy_tx_pyld_len = payload_len; |
| |
| /* If we already started transmitting, abort it! */ |
| state = NRF_RADIO->STATE; |
| if (state != RADIO_STATE_STATE_Tx) { |
| /* Set phy state to transmitting and count packet statistics */ |
| g_ble_phy_data.phy_state = BLE_PHY_STATE_TX; |
| STATS_INC(ble_phy_stats, tx_good); |
| STATS_INCN(ble_phy_stats, tx_bytes, payload_len + BLE_LL_PDU_HDR_LEN); |
| rc = BLE_ERR_SUCCESS; |
| } else { |
| ble_phy_disable(); |
| STATS_INC(ble_phy_stats, tx_late); |
| rc = BLE_PHY_ERR_RADIO_STATE; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * ble phy txpwr set |
| * |
| * Set the transmit output power (in dBm). |
| * |
| * NOTE: If the output power specified is within the BLE limits but outside |
| * the chip limits, we "rail" the power level so we dont exceed the min/max |
| * chip values. |
| * |
| * @param dbm Power output in dBm. |
| * |
| * @return int 0: success; anything else is an error |
| */ |
| int |
| ble_phy_txpwr_set(int dbm) |
| { |
| /* "Rail" power level if outside supported range */ |
| dbm = ble_phy_txpower_round(dbm); |
| |
| NRF_RADIO->TXPOWER = dbm; |
| g_ble_phy_data.phy_txpwr_dbm = dbm; |
| |
| return 0; |
| } |
| |
| /** |
| * ble phy txpwr round |
| * |
| * Get the rounded transmit output power (in dBm). |
| * |
| * @param dbm Power output in dBm. |
| * |
| * @return int Rounded power in dBm |
| */ |
| int ble_phy_txpower_round(int dbm) |
| { |
| /* TODO this should be per nRF52XXX */ |
| |
| /* "Rail" power level if outside supported range */ |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Pos4dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Pos4dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Pos3dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Pos3dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_0dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_0dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Neg4dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Neg4dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Neg8dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Neg8dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Neg12dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Neg12dBm; |
| } |
| |
| if (dbm >= (int8_t)RADIO_TXPOWER_TXPOWER_Neg20dBm) { |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Neg20dBm; |
| } |
| |
| return (int8_t)RADIO_TXPOWER_TXPOWER_Neg40dBm; |
| } |
| |
| /** |
| * ble phy set access addr |
| * |
| * Set access address. |
| * |
| * @param access_addr Access address |
| * |
| * @return int 0: success; PHY error code otherwise |
| */ |
| int |
| ble_phy_set_access_addr(uint32_t access_addr) |
| { |
| NRF_RADIO->BASE0 = (access_addr << 8); |
| NRF_RADIO->PREFIX0 = (NRF_RADIO->PREFIX0 & 0xFFFFFF00) | (access_addr >> 24); |
| |
| g_ble_phy_data.phy_access_address = access_addr; |
| |
| ble_phy_apply_errata_102_106_107(); |
| |
| return 0; |
| } |
| |
| /** |
| * ble phy txpwr get |
| * |
| * Get the transmit power. |
| * |
| * @return int The current PHY transmit power, in dBm |
| */ |
| int |
| ble_phy_txpwr_get(void) |
| { |
| return g_ble_phy_data.phy_txpwr_dbm; |
| } |
| |
| void |
| ble_phy_set_rx_pwr_compensation(int8_t compensation) |
| { |
| g_ble_phy_data.rx_pwr_compensation = compensation; |
| } |
| |
| /** |
| * ble phy setchan |
| * |
| * Sets the logical frequency of the transceiver. The input parameter is the |
| * BLE channel index (0 to 39, inclusive). The NRF frequency register works like |
| * this: logical frequency = 2400 + FREQ (MHz). |
| * |
| * Thus, to get a logical frequency of 2402 MHz, you would program the |
| * FREQUENCY register to 2. |
| * |
| * @param chan This is the Data Channel Index or Advertising Channel index |
| * |
| * @return int 0: success; PHY error code otherwise |
| */ |
| int |
| ble_phy_setchan(uint8_t chan, uint32_t access_addr, uint32_t crcinit) |
| { |
| assert(chan < BLE_PHY_NUM_CHANS); |
| |
| /* Check for valid channel range */ |
| if (chan >= BLE_PHY_NUM_CHANS) { |
| return BLE_PHY_ERR_INV_PARAM; |
| } |
| |
| /* Set current access address */ |
| ble_phy_set_access_addr(access_addr); |
| |
| /* Configure crcinit */ |
| NRF_RADIO->CRCINIT = crcinit; |
| |
| /* Set the frequency and the data whitening initial value */ |
| g_ble_phy_data.phy_chan = chan; |
| NRF_RADIO->FREQUENCY = g_ble_phy_chan_freq[chan]; |
| NRF_RADIO->DATAWHITEIV = chan; |
| |
| return 0; |
| } |
| |
| /** |
| * Stop the timer used to count microseconds when using RTC for cputime |
| */ |
| void |
| ble_phy_stop_usec_timer(void) |
| { |
| NRF_TIMER0->TASKS_STOP = 1; |
| NRF_TIMER0->TASKS_SHUTDOWN = 1; |
| NRF_RTC0->EVTENCLR = RTC_EVTENSET_COMPARE0_Msk; |
| } |
| |
| /** |
| * ble phy disable irq and ppi |
| * |
| * This routine is to be called when reception was stopped due to either a |
| * wait for response timeout or a packet being received and the phy is to be |
| * restarted in receive mode. Generally, the disable routine is called to stop |
| * the phy. |
| */ |
| void |
| ble_phy_disable_irq_and_ppi(void) |
| { |
| NRF_RADIO->INTENCLR = NRF_RADIO_IRQ_MASK_ALL; |
| NRF_RADIO->SHORTS = 0; |
| NRF_RADIO->TASKS_DISABLE = 1; |
| NRF_PPI->CHENCLR = PPI_CHEN_CH4_Msk | PPI_CHEN_CH5_Msk | PPI_CHEN_CH20_Msk | |
| PPI_CHEN_CH21_Msk | PPI_CHEN_CH23_Msk | |
| PPI_CHEN_CH25_Msk | PPI_CHEN_CH31_Msk; |
| NVIC_ClearPendingIRQ(RADIO_IRQn); |
| g_ble_phy_data.phy_state = BLE_PHY_STATE_IDLE; |
| } |
| |
| void |
| ble_phy_restart_rx(void) |
| { |
| ble_phy_disable_irq_and_ppi(); |
| |
| ble_phy_set_start_now(); |
| /* Enable PPI to automatically start RXEN */ |
| NRF_PPI->CHENSET = PPI_CHEN_CH21_Msk; |
| |
| ble_phy_rx(); |
| } |
| |
| /** |
| * ble phy disable |
| * |
| * Disables the PHY. This should be called when an event is over. It stops |
| * the usec timer (if used), disables interrupts, disables the RADIO, disables |
| * PPI and sets state to idle. |
| */ |
| void |
| ble_phy_disable(void) |
| { |
| ble_phy_trace_void(BLE_PHY_TRACE_ID_DISABLE); |
| |
| ble_phy_stop_usec_timer(); |
| ble_phy_disable_irq_and_ppi(); |
| } |
| |
| /* Gets the current access address */ |
| uint32_t ble_phy_access_addr_get(void) |
| { |
| return g_ble_phy_data.phy_access_address; |
| } |
| |
| /** |
| * Return the phy state |
| * |
| * @return int The current PHY state. |
| */ |
| int |
| ble_phy_state_get(void) |
| { |
| return g_ble_phy_data.phy_state; |
| } |
| |
| /** |
| * Called to see if a reception has started |
| * |
| * @return int |
| */ |
| int |
| ble_phy_rx_started(void) |
| { |
| return g_ble_phy_data.phy_rx_started; |
| } |
| |
| /** |
| * Return the transceiver state |
| * |
| * @return int transceiver state. |
| */ |
| uint8_t |
| ble_phy_xcvr_state_get(void) |
| { |
| uint32_t state; |
| state = NRF_RADIO->STATE; |
| return (uint8_t)state; |
| } |
| |
| /** |
| * Called to return the maximum data pdu payload length supported by the |
| * phy. For this chip, if encryption is enabled, the maximum payload is 27 |
| * bytes. |
| * |
| * @return uint8_t Maximum data channel PDU payload size supported |
| */ |
| uint8_t |
| ble_phy_max_data_pdu_pyld(void) |
| { |
| return BLE_LL_DATA_PDU_MAX_PYLD; |
| } |
| |
| #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1) |
| void |
| ble_phy_resolv_list_enable(void) |
| { |
| NRF_AAR->NIRK = (uint32_t)g_nrf_num_irks; |
| g_ble_phy_data.phy_privacy = 1; |
| } |
| |
| void |
| ble_phy_resolv_list_disable(void) |
| { |
| g_ble_phy_data.phy_privacy = 0; |
| } |
| #endif |
| |
| #if MYNEWT_VAL(BLE_LL_DIRECT_TEST_MODE) == 1 |
| void ble_phy_enable_dtm(void) |
| { |
| /* When DTM is enabled we need to disable whitening as per |
| * Bluetooth v5.0 Vol 6. Part F. 4.1.1 |
| */ |
| NRF_RADIO->PCNF1 &= ~RADIO_PCNF1_WHITEEN_Msk; |
| } |
| |
| void ble_phy_disable_dtm(void) |
| { |
| /* Enable whitening */ |
| NRF_RADIO->PCNF1 |= RADIO_PCNF1_WHITEEN_Msk; |
| } |
| #endif |
| |
| void |
| ble_phy_rfclk_enable(void) |
| { |
| #if MYNEWT |
| nrf52_clock_hfxo_request(); |
| #else |
| NRF_CLOCK->TASKS_HFCLKSTART = 1; |
| #endif |
| } |
| |
| void |
| ble_phy_rfclk_disable(void) |
| { |
| #if MYNEWT |
| nrf52_clock_hfxo_release(); |
| #else |
| NRF_CLOCK->TASKS_HFCLKSTOP = 1; |
| #endif |
| } |