| /**************************************************************************** |
| * boards/arm/sam34/arduino-due/include/board.h |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * 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. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H |
| #define __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #ifndef __ASSEMBLY__ |
| # include <stdint.h> |
| # include <stdbool.h> |
| # ifdef CONFIG_SAM34_GPIO_IRQ |
| # include <arch/irq.h> |
| # endif |
| #endif |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| /* Clocking *****************************************************************/ |
| |
| /* After power-on reset, the SAM3X device is running on a 4MHz internal RC. |
| * These definitions will configure clocking |
| * |
| * MAINOSC: Frequency = 12MHz (crystal) |
| * PLLA: PLL Divider = 1, Multiplier = 14 to generate PLLACK = 168MHz |
| * Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 84MHz |
| * CPU clock: 84MHz |
| */ |
| |
| #define BOARD_32KOSC_FREQUENCY (32768) |
| #define BOARD_SCLK_FREQUENCY (BOARD_32KOSC_FREQUENCY) |
| #define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */ |
| |
| /* Main oscillator register settings. |
| * |
| * The start up time should be should be: |
| * Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles. |
| */ |
| |
| #define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */ |
| |
| /* PLLA configuration. |
| * |
| * Divider = 1 |
| * Multiplier = 14 |
| */ |
| |
| #define BOARD_CKGR_PLLAR_MUL (13 << PMC_CKGR_PLLAR_MUL_SHIFT) |
| #define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT) |
| #define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS |
| |
| /* PMC master clock register settings. |
| * |
| * Source = PLLA |
| * Divider = 2 |
| */ |
| |
| #define BOARD_PMC_MCKR_CSS PMC_MCKR_CSS_PLLA |
| #define BOARD_PMC_MCKR_PRES PMC_MCKR_PRES_DIV2 |
| |
| /* USB UTMI PLL start-up time */ |
| |
| #define BOARD_CKGR_UCKR_UPLLCOUNT (3 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT) |
| |
| /* Resulting frequencies */ |
| |
| #define BOARD_PLLA_FREQUENCY (168000000) /* PLLACK: 14 * 12Mhz / 1 */ |
| #define BOARD_MCK_FREQUENCY (84000000) /* MCK: PLLACK / 2 */ |
| #define BOARD_CPU_FREQUENCY (84000000) /* CPU: MCK */ |
| |
| /* HSMCI clocking |
| * |
| * Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock |
| * (MCK) divided by (2*(CLKDIV+1)). |
| * |
| * MCI_SPEED = MCCK / (2*(CLKDIV+1)) |
| * CLKDIV = MCCK / MCI_SPEED / 2 - 1 |
| * |
| * Where CLKDIV has a range of 0-255. |
| */ |
| |
| /* MCK = 84MHz, CLKDIV = 104, |
| * MCI_SPEED = 84MHz / 2 * (104+1) = 400 KHz |
| */ |
| |
| #define HSMCI_INIT_CLKDIV (104 << HSMCI_MR_CLKDIV_SHIFT) |
| |
| /* MCK = 84MHz, CLKDIV = 2, MCI_SPEED = 84MHz / 2 * (2+1) = 14 MHz */ |
| |
| #define HSMCI_MMCXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT) |
| |
| /* MCK = 84MHz, CLKDIV = 1, MCI_SPEED = 84MHz / 2 * (1+1) = 21 MHz */ |
| |
| #define HSMCI_SDXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT) |
| #define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV |
| |
| /* FLASH wait states |
| * |
| * FWS MAX FREQUENCY |
| * 1.62V 1.8V |
| * --- ----- ------ |
| * 0 17MHz 19MHz |
| * 1 45MHz 50MHz |
| * 2 58MHz 64MHz |
| * 3 70MHz 80MHz |
| * 4 78MHz 90MHz |
| */ |
| |
| #define BOARD_FWS 4 |
| |
| /* Serial Peripheral Interface (SPI) */ |
| |
| #define GPIO_SPI0_SPCK GPIO_SPI0_SPCK_1 |
| #define GPIO_SPI0_CS (GPIO_OUTPUT | GPIO_CFG_DEFAULT | GPIO_OUTPUT_SET | GPIO_PORT_PIOC | GPIO_PIN21) |
| |
| /* LED definitions **********************************************************/ |
| |
| /* There are three user-controllable LEDs on board the Arduino Due board: |
| * |
| * LED GPIO |
| * ---------------- ----- |
| * L Amber LED PB27 |
| * TX Yellow LED PA21 |
| * RX Yellow LED PC30 |
| * |
| * LED L is connected to ground and can be illuminated by driving the PB27 |
| * output high. The TX and RX LEDs are pulled high and can be illuminated by |
| * driving the corresponding |
| * GPIO output to low. |
| */ |
| |
| #define LED_DRIVER_PATH "/dev/userleds" |
| |
| /* LED index values for use with board_userled() */ |
| |
| #define BOARD_LED_L 0 |
| #define BOARD_LED_RX 1 |
| #define BOARD_LED_TX 2 |
| #define BOARD_NLEDS 3 |
| |
| /* LED bits for use with board_userled_all() */ |
| |
| #define BOARD_LED_L_BIT (1 << BOARD_LED_L) |
| #define BOARD_LED_RX_BIT (1 << BOARD_LED_RX) |
| #define BOARD_LED_TX_BIT (1 << BOARD_LED_TX) |
| |
| /* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is |
| * defined. In that case, the usage by the board port is defined in |
| * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related |
| * events as follows: |
| * |
| * SYMBOL MEANING LED STATE |
| * L TX RX |
| * ----------------------- -------------------------- ---- ---- ---- |
| */ |
| |
| #define LED_STARTED 0 /* NuttX has been started OFF OFF OFF */ |
| #define LED_HEAPALLOCATE 0 /* Heap has been allocated OFF OFF OFF */ |
| #define LED_IRQSENABLED 0 /* Interrupts enabled OFF OFF OFF */ |
| #define LED_STACKCREATED 1 /* Idle stack created ON OFF OFF */ |
| #define LED_INIRQ 2 /* In an interrupt N/C GLOW OFF */ |
| #define LED_SIGNAL 2 /* In a signal handler N/C GLOW OFF */ |
| #define LED_ASSERTION 2 /* An assertion failed N/C GLOW OFF */ |
| #define LED_PANIC 3 /* The system has crashed N/C N/C Blinking */ |
| #define LED_PANIC 3 /* MCU is is sleep mode ---- Not used ---- */ |
| |
| /* Thus if LED L is statically on, NuttX has successfully booted and is, |
| * apparently, running normmally. If LED RX is glowing, then NuttX is |
| * handling interrupts (and also signals and assertions). If TX is flashing |
| * at approximately 2Hz, then a fatal error has been detected and the system |
| */ |
| |
| /* Button definitions *******************************************************/ |
| |
| /* There are no buttons on the Arduino Due board. */ |
| |
| /* GPIO pin configurations **************************************************/ |
| |
| #if 1 /* #ifdef CONFIG_ARDUINO_DUE_REV3 works with REV2 as well */ |
| |
| /* This port was performed on the Arduino Due Rev 2 board. |
| * A NuttX user reported issues with the serial port on his Aduino Due Rev 3 |
| * board. |
| * That problem was resolved as follows: |
| * |
| * "... The issue was in my hardware. I found the difference between Arduino |
| * Due schematics (revision R2) and actual PCB layout of my Arduino |
| * (revision R3). |
| * On a schematics which I download from arduino.cc was shown that 2nd |
| * pin of IC10 is connected to the ground, but on my Arduino the 2nd pin |
| * of IC10 was connected to its 1st pin instead of ground and in my case |
| * IC10 works in open-drain mode, but RX0 pin on SAM3x doesn't have pull-up |
| * and thus TX signal from AtMega16U2 can't reach the SAM3x input pin, on |
| * this pin always '0'. |
| * |
| * "My solution is to enable internal pull-up in SAM3x. ... |
| * Now shell console on UART0 (via USB programming connector) of Arduino |
| * Due works as expected." |
| */ |
| |
| # undef GPIO_UART0_RXD |
| # define GPIO_UART0_RXD (GPIO_PERIPHA | GPIO_CFG_DEFAULT | GPIO_PORT_PIOA | \ |
| GPIO_PIN8 | GPIO_CFG_PULLUP) |
| #endif |
| #endif /* __BOARDS_ARM_SAM34_ARDUINO_DUE_INCLUDE_BOARD_H */ |
