mbed library sources
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Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/serial_api.c
- Revision:
- 429:cc5da43e7bf6
- Parent:
- 428:4ddf7f7eabbb
- Child:
- 430:d406b7919023
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/serial_api.c Mon Dec 08 07:30:07 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,337 +0,0 @@ -/* mbed Microcontroller Library - ******************************************************************************* - * Copyright (c) 2014, STMicroelectronics - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. Neither the name of STMicroelectronics nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - ******************************************************************************* - */ -#include "mbed_assert.h" -#include "serial_api.h" - -#if DEVICE_SERIAL - -#include "cmsis.h" -#include "pinmap.h" -#include <string.h> -#include "PeripheralPins.h" - -#define UART_NUM (3) - -static uint32_t serial_irq_ids[UART_NUM] = {0, 0, 0}; - -static uart_irq_handler irq_handler; - -UART_HandleTypeDef UartHandle; - -int stdio_uart_inited = 0; -serial_t stdio_uart; - -static void init_uart(serial_t *obj) -{ - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - - UartHandle.Init.BaudRate = obj->baudrate; - UartHandle.Init.WordLength = obj->databits; - UartHandle.Init.StopBits = obj->stopbits; - UartHandle.Init.Parity = obj->parity; - UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE; - - if (obj->pin_rx == NC) { - UartHandle.Init.Mode = UART_MODE_TX; - } else if (obj->pin_tx == NC) { - UartHandle.Init.Mode = UART_MODE_RX; - } else { - UartHandle.Init.Mode = UART_MODE_TX_RX; - } - - HAL_UART_Init(&UartHandle); -} - -void serial_init(serial_t *obj, PinName tx, PinName rx) -{ - // Determine the UART to use (UART_1, UART_2, ...) - UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX); - UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX); - - // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object - obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx); - MBED_ASSERT(obj->uart != (UARTName)NC); - - // Enable USART clock - if (obj->uart == UART_1) { - __USART1_CLK_ENABLE(); - obj->index = 0; - } - if (obj->uart == UART_2) { - __USART2_CLK_ENABLE(); - obj->index = 1; - } - if (obj->uart == UART_6) { - __USART6_CLK_ENABLE(); - obj->index = 2; - } - - // Configure the UART pins - pinmap_pinout(tx, PinMap_UART_TX); - pinmap_pinout(rx, PinMap_UART_RX); - if (tx != NC) { - pin_mode(tx, PullUp); - } - if (rx != NC) { - pin_mode(rx, PullUp); - } - - // Configure UART - obj->baudrate = 9600; - obj->databits = UART_WORDLENGTH_8B; - obj->stopbits = UART_STOPBITS_1; - obj->parity = UART_PARITY_NONE; - - obj->pin_tx = tx; - obj->pin_rx = rx; - - init_uart(obj); - - // For stdio management - if (obj->uart == STDIO_UART) { - stdio_uart_inited = 1; - memcpy(&stdio_uart, obj, sizeof(serial_t)); - } -} - -void serial_free(serial_t *obj) -{ - // Reset UART and disable clock - if (obj->uart == UART_1) { - __USART1_FORCE_RESET(); - __USART1_RELEASE_RESET(); - __USART1_CLK_DISABLE(); - } - if (obj->uart == UART_2) { - __USART2_FORCE_RESET(); - __USART2_RELEASE_RESET(); - __USART2_CLK_DISABLE(); - } - if (obj->uart == UART_6) { - __USART6_FORCE_RESET(); - __USART6_RELEASE_RESET(); - __USART6_CLK_DISABLE(); - } - - // Configure GPIOs - pin_function(obj->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); - pin_function(obj->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); - - serial_irq_ids[obj->index] = 0; -} - -void serial_baud(serial_t *obj, int baudrate) -{ - obj->baudrate = baudrate; - init_uart(obj); -} - -void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) -{ - if (data_bits == 9) { - obj->databits = UART_WORDLENGTH_9B; - } else { - obj->databits = UART_WORDLENGTH_8B; - } - - switch (parity) { - case ParityOdd: - case ParityForced0: - obj->parity = UART_PARITY_ODD; - break; - case ParityEven: - case ParityForced1: - obj->parity = UART_PARITY_EVEN; - break; - default: // ParityNone - obj->parity = UART_PARITY_NONE; - break; - } - - if (stop_bits == 2) { - obj->stopbits = UART_STOPBITS_2; - } else { - obj->stopbits = UART_STOPBITS_1; - } - - init_uart(obj); -} - -/****************************************************************************** - * INTERRUPTS HANDLING - ******************************************************************************/ - -static void uart_irq(UARTName name, int id) -{ - UartHandle.Instance = (USART_TypeDef *)name; - if (serial_irq_ids[id] != 0) { - if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TC) != RESET) { - irq_handler(serial_irq_ids[id], TxIrq); - __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TC); - } - if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) { - irq_handler(serial_irq_ids[id], RxIrq); - __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE); - } - } -} - -static void uart1_irq(void) -{ - uart_irq(UART_1, 0); -} - -static void uart2_irq(void) -{ - uart_irq(UART_2, 1); -} - -static void uart6_irq(void) -{ - uart_irq(UART_6, 2); -} - -void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) -{ - irq_handler = handler; - serial_irq_ids[obj->index] = id; -} - -void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) -{ - IRQn_Type irq_n = (IRQn_Type)0; - uint32_t vector = 0; - - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - - if (obj->uart == UART_1) { - irq_n = USART1_IRQn; - vector = (uint32_t)&uart1_irq; - } - - if (obj->uart == UART_2) { - irq_n = USART2_IRQn; - vector = (uint32_t)&uart2_irq; - } - - if (obj->uart == UART_6) { - irq_n = USART6_IRQn; - vector = (uint32_t)&uart6_irq; - } - - if (enable) { - - if (irq == RxIrq) { - __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE); - } else { // TxIrq - __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_TC); - } - - NVIC_SetVector(irq_n, vector); - NVIC_EnableIRQ(irq_n); - - } else { // disable - - int all_disabled = 0; - - if (irq == RxIrq) { - __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_RXNE); - // Check if TxIrq is disabled too - if ((UartHandle.Instance->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1; - } else { // TxIrq - __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_TXE); - // Check if RxIrq is disabled too - if ((UartHandle.Instance->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1; - } - - if (all_disabled) NVIC_DisableIRQ(irq_n); - - } -} - -/****************************************************************************** - * READ/WRITE - ******************************************************************************/ - -int serial_getc(serial_t *obj) -{ - USART_TypeDef *uart = (USART_TypeDef *)(obj->uart); - while (!serial_readable(obj)); - return (int)(uart->DR & 0x1FF); -} - -void serial_putc(serial_t *obj, int c) -{ - USART_TypeDef *uart = (USART_TypeDef *)(obj->uart); - while (!serial_writable(obj)); - uart->DR = (uint32_t)(c & 0x1FF); -} - -int serial_readable(serial_t *obj) -{ - int status; - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - // Check if data is received - status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) ? 1 : 0); - return status; -} - -int serial_writable(serial_t *obj) -{ - int status; - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - // Check if data is transmitted - status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE) != RESET) ? 1 : 0); - return status; -} - -void serial_clear(serial_t *obj) -{ - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TXE); - __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE); -} - -void serial_pinout_tx(PinName tx) -{ - pinmap_pinout(tx, PinMap_UART_TX); -} - -void serial_break_set(serial_t *obj) -{ - UartHandle.Instance = (USART_TypeDef *)(obj->uart); - HAL_LIN_SendBreak(&UartHandle); -} - -void serial_break_clear(serial_t *obj) -{ -} - -#endif