| /* |
| * 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 "os/mynewt.h" |
| |
| #if MYNEWT_VAL(CONSOLE_RTT) |
| #include <ctype.h> |
| |
| #include "rtt/SEGGER_RTT.h" |
| #include "console/console.h" |
| #include "console_priv.h" |
| |
| #if MYNEWT_VAL(CONSOLE_INPUT) |
| static struct hal_timer rtt_timer; |
| #endif |
| |
| #if MYNEWT_VAL(CONSOLE_RTT_RETRY_COUNT) > 0 |
| |
| static void |
| rtt_console_wait_for_retry(void) |
| { |
| uint32_t ticks; |
| |
| if (os_arch_in_isr()) { |
| #if MYNEWT_VAL(CONSOLE_RTT_RETRY_IN_ISR) |
| os_cputime_delay_usecs(MYNEWT_VAL(CONSOLE_RTT_RETRY_DELAY_MS) * 1000); |
| #endif |
| } else { |
| ticks = max(1, os_time_ms_to_ticks32(MYNEWT_VAL(CONSOLE_RTT_RETRY_DELAY_MS))); |
| os_time_delay(ticks); |
| } |
| } |
| |
| static void |
| rtt_console_write_ch(char c) |
| { |
| static int rtt_console_retries_left = MYNEWT_VAL(CONSOLE_RTT_RETRY_COUNT); |
| os_sr_t sr; |
| int ret; |
| |
| while (1) { |
| OS_ENTER_CRITICAL(sr); |
| ret = SEGGER_RTT_WriteNoLock(0, &c, 1); |
| OS_EXIT_CRITICAL(sr); |
| |
| /* |
| * In case write failed we can wait a bit and retry to allow host pull |
| * some data from buffer. However, in case there is no host connected |
| * we should not spend time retrying over and over again so need to be |
| * smarter here: |
| * - each successful write resets retry counter to predefined value |
| * - each failed write will retry until success or retry counter drops |
| * to zero |
| * This means that if we failed to write some character after number of |
| * retries (which means that most likely there is no host connected to |
| * read data), we stop retrying until successful write (which means that |
| * host is reading data). |
| */ |
| |
| if (ret) { |
| rtt_console_retries_left = MYNEWT_VAL(CONSOLE_RTT_RETRY_COUNT); |
| break; |
| } |
| |
| if (!rtt_console_retries_left) { |
| break; |
| } |
| |
| rtt_console_wait_for_retry(); |
| rtt_console_retries_left--; |
| } |
| } |
| |
| #else |
| |
| static void |
| rtt_console_write_ch(char c) |
| { |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| SEGGER_RTT_WriteNoLock(0, &c, 1); |
| OS_EXIT_CRITICAL(sr); |
| } |
| |
| #endif |
| |
| int |
| console_out(int character) |
| { |
| char c = (char)character; |
| |
| if (g_silence_console) { |
| return c; |
| } |
| |
| if ('\n' == c) { |
| rtt_console_write_ch('\r'); |
| console_is_midline = 0; |
| } else { |
| console_is_midline = 1; |
| } |
| |
| rtt_console_write_ch(c); |
| |
| return character; |
| } |
| |
| void |
| console_rx_restart(void) |
| { |
| os_cputime_timer_relative(&rtt_timer, 0); |
| } |
| |
| #if MYNEWT_VAL(CONSOLE_INPUT) |
| |
| #define RTT_INPUT_POLL_INTERVAL_MIN 10 /* ms */ |
| #define RTT_INPUT_POLL_INTERVAL_STEP 10 /* ms */ |
| #define RTT_INPUT_POLL_INTERVAL_MAX MYNEWT_VAL(CONSOLE_RTT_INPUT_POLL_INTERVAL_MAX) |
| |
| static void |
| rtt_console_poll_func(void *arg) |
| { |
| static uint32_t itvl_ms = RTT_INPUT_POLL_INTERVAL_MIN; |
| static int key = -1; |
| int ret; |
| |
| if (key < 0) { |
| key = SEGGER_RTT_GetKey(); |
| } |
| |
| if (key < 0) { |
| itvl_ms += RTT_INPUT_POLL_INTERVAL_STEP; |
| itvl_ms = min(itvl_ms, RTT_INPUT_POLL_INTERVAL_MAX); |
| } else { |
| while (key >= 0) { |
| ret = console_handle_char((char)key); |
| if (ret < 0) { |
| return; |
| } |
| key = SEGGER_RTT_GetKey(); |
| } |
| itvl_ms = RTT_INPUT_POLL_INTERVAL_MIN; |
| } |
| |
| os_cputime_timer_relative(&rtt_timer, itvl_ms * 1000); |
| } |
| #endif |
| |
| int |
| rtt_console_is_init(void) |
| { |
| return 1; |
| } |
| |
| int |
| rtt_console_init(void) |
| { |
| #if MYNEWT_VAL(CONSOLE_INPUT) |
| os_cputime_timer_init(&rtt_timer, rtt_console_poll_func, NULL); |
| /* start after a second */ |
| os_cputime_timer_relative(&rtt_timer, 1000000); |
| #endif |
| return 0; |
| } |
| |
| #endif /* MYNEWT_VAL(CONSOLE_RTT) */ |