diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c new file mode 100644 index 0000000000..aac406dec7 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c @@ -0,0 +1,312 @@ +/* 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" +#include "cmsis.h" +#include "pinmap.h" +#include <string.h> + +static const PinMap PinMap_UART_TX[] = { + {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PA_14, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_9, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PC_4, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {NC, NC, 0} +}; + +static const PinMap PinMap_UART_RX[] = { + {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_4, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_8, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PC_5, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)}, + {NC, NC, 0} +}; + +#define UART_NUM (2) + +static uint32_t serial_irq_ids[UART_NUM] = {0}; + +static uart_irq_handler irq_handler; + +int stdio_uart_inited = 0; +serial_t stdio_uart; + +static void init_usart(serial_t *obj) { + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + USART_InitTypeDef USART_InitStructure; + + USART_Cmd(usart, DISABLE); + + USART_InitStructure.USART_BaudRate = obj->baudrate; + USART_InitStructure.USART_WordLength = obj->databits; + USART_InitStructure.USART_StopBits = obj->stopbits; + USART_InitStructure.USART_Parity = obj->parity; + USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; + USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; + USART_Init(usart, &USART_InitStructure); + + USART_Cmd(usart, ENABLE); +} + +void serial_init(serial_t *obj, PinName tx, PinName rx) { + // Determine the UART to use + UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX); + UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX); + + // Get the peripheral name 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) { + RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); + } + if (obj->uart == UART_2) { + RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); + } + if (obj->uart == UART_3) { + RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); + } + + // 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 = USART_WordLength_8b; + obj->stopbits = USART_StopBits_1; + obj->parity = USART_Parity_No; + + init_usart(obj); + + // The index is used by irq + if (obj->uart == UART_1) obj->index = 0; + if (obj->uart == UART_2) obj->index = 1; + if (obj->uart == UART_3) obj->index = 2; + + // 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) { + serial_irq_ids[obj->index] = 0; +} + +void serial_baud(serial_t *obj, int baudrate) { + obj->baudrate = baudrate; + init_usart(obj); +} + +void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) { + if (data_bits == 8) { + obj->databits = USART_WordLength_8b; + } else { + obj->databits = USART_WordLength_9b; + } + + switch (parity) { + case ParityOdd: + case ParityForced0: + obj->parity = USART_Parity_Odd; + break; + case ParityEven: + case ParityForced1: + obj->parity = USART_Parity_Even; + break; + default: // ParityNone + obj->parity = USART_Parity_No; + break; + } + + if (stop_bits == 2) { + obj->stopbits = USART_StopBits_2; + } else { + obj->stopbits = USART_StopBits_1; + } + + init_usart(obj); +} + +/****************************************************************************** + * INTERRUPTS HANDLING + ******************************************************************************/ + +// not api +static void uart_irq(USART_TypeDef* usart, int id) { + if (serial_irq_ids[id] != 0) { + if (USART_GetITStatus(usart, USART_IT_TC) != RESET) { + irq_handler(serial_irq_ids[id], TxIrq); + USART_ClearITPendingBit(usart, USART_IT_TC); + } + if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) { + irq_handler(serial_irq_ids[id], RxIrq); + USART_ClearITPendingBit(usart, USART_IT_RXNE); + } + } +} + +static void uart1_irq(void) { + uart_irq((USART_TypeDef*)UART_1, 0); +} +static void uart2_irq(void) { + uart_irq((USART_TypeDef*)UART_2, 1); +} +static void uart3_irq(void) { + uart_irq((USART_TypeDef*)UART_3, 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; + USART_TypeDef *usart = (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_3) { + irq_n = USART3_IRQn; + vector = (uint32_t)&uart3_irq; + } + + if (enable) { + + if (irq == RxIrq) { + USART_ITConfig(usart, USART_IT_RXNE, ENABLE); + } else { // TxIrq + USART_ITConfig(usart, USART_IT_TC, ENABLE); + } + + NVIC_SetVector(irq_n, vector); + NVIC_EnableIRQ(irq_n); + + } else { // disable + + int all_disabled = 0; + + if (irq == RxIrq) { + USART_ITConfig(usart, USART_IT_RXNE, DISABLE); + // Check if TxIrq is disabled too + if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1; + } else { // TxIrq + USART_ITConfig(usart, USART_IT_TXE, DISABLE); + // Check if RxIrq is disabled too + if ((usart->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 *usart = (USART_TypeDef *)(obj->uart); + while (!serial_readable(obj)); + return (int)(USART_ReceiveData(usart)); +} + +void serial_putc(serial_t *obj, int c) { + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + while (!serial_writable(obj)); + USART_SendData(usart, (uint16_t)c); +} + +int serial_readable(serial_t *obj) { + int status; + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + // Check if data is received + status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0); + return status; +} + +int serial_writable(serial_t *obj) { + int status; + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + // Check if data is transmitted + status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0); + return status; +} + +void serial_clear(serial_t *obj) { + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + USART_ClearFlag(usart, USART_FLAG_TXE); + USART_ClearFlag(usart, USART_FLAG_RXNE); +} + +void serial_pinout_tx(PinName tx) { + pinmap_pinout(tx, PinMap_UART_TX); +} + +void serial_break_set(serial_t *obj) { + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE); +} + +void serial_break_clear(serial_t *obj) { + USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); + USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE); + USART_ClearFlag(usart, USART_FLAG_SBK); +} |