/* * Copyright (c) 2006-2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2019-04-02 henryhuang the first version */ #include <HAL_device.h> #include <rtdevice.h> #include "drv_uart.h" /* UART1 */ #define UART1_GPIO_TX GPIO_Pin_9 #define UART1_GPIO_TX_SOURCE GPIO_PinSource9 #define UART1_GPIO_RX GPIO_Pin_10 #define UART1_GPIO_RX_SOURCE GPIO_PinSource10 #define UART1_GPIO_AF GPIO_AF_1 #define UART1_GPIO GPIOA /* UART2 */ #define UART2_GPIO_TX GPIO_Pin_2 #define UART2_GPIO_TX_SOURCE GPIO_PinSource2 #define UART2_GPIO_RX GPIO_Pin_3 #define UART2_GPIO_RX_SOURCE GPIO_PinSource3 #define UART2_GPIO_AF GPIO_AF_1 #define UART2_GPIO GPIOA /* uart driver */ struct mm32_uart { UART_TypeDef *uart; IRQn_Type irq; }; static rt_err_t mm32_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg) { struct mm32_uart *uart; UART_InitTypeDef UART_InitStructure; RT_ASSERT(serial != RT_NULL); RT_ASSERT(cfg != RT_NULL); uart = (struct mm32_uart *)serial->parent.user_data; UART_InitStructure.UART_BaudRate = cfg->baud_rate; if (cfg->data_bits == DATA_BITS_8) UART_InitStructure.UART_WordLength = UART_WordLength_8b; if (cfg->stop_bits == STOP_BITS_1) UART_InitStructure.UART_StopBits = UART_StopBits_1; else if (cfg->stop_bits == STOP_BITS_2) UART_InitStructure.UART_StopBits = UART_StopBits_2; UART_InitStructure.UART_Parity = UART_Parity_No; UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None; UART_InitStructure.UART_Mode = UART_Mode_Rx | UART_Mode_Tx; UART_Init(uart->uart, &UART_InitStructure); /* Enable UART */ UART_Cmd(uart->uart, ENABLE); return RT_EOK; } static rt_err_t mm32_uart_control(struct rt_serial_device *serial, int cmd, void *arg) { struct mm32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct mm32_uart *)serial->parent.user_data; switch (cmd) { case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */ NVIC_DisableIRQ(uart->irq); UART_ITConfig(uart->uart, UART_IT_RXIEN, DISABLE); break; case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */ NVIC_EnableIRQ(uart->irq); /* enable interrupt */ UART_ITConfig(uart->uart, UART_IT_RXIEN, ENABLE); break; } return RT_EOK; } static int mm32_uart_putc(struct rt_serial_device *serial, char c) { struct mm32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct mm32_uart *)serial->parent.user_data; while ((uart->uart->CSR & UART_CSR_TXC) == 0); uart->uart->TDR = c; return 1; } static int mm32_uart_getc(struct rt_serial_device *serial) { int ch; struct mm32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct mm32_uart *)serial->parent.user_data; ch = -1; if (uart->uart->CSR & UART_FLAG_RXAVL) { ch = uart->uart->RDR & 0xff; } return ch; } static const struct rt_uart_ops mm32_uart_ops = { mm32_uart_configure, mm32_uart_control, mm32_uart_putc, mm32_uart_getc, }; #if defined(BSP_USING_UART1) /* UART1 device driver structure */ static struct mm32_uart uart1; struct rt_serial_device serial1; void UART1_IRQHandler(void) { struct mm32_uart *uart; uart = &uart1; /* enter interrupt */ rt_interrupt_enter(); if (UART_GetITStatus(uart->uart, UART_IT_RXIEN) != RESET) { UART_ClearITPendingBit(uart->uart, UART_IT_RXIEN); rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND); } if (UART_GetITStatus(uart->uart, UART_IT_TXIEN) != RESET) { /* clear interrupt */ UART_ClearITPendingBit(uart->uart, UART_IT_TXIEN); } /* leave interrupt */ rt_interrupt_leave(); } #endif /* BSP_USING_UART1 */ #if defined(BSP_USING_UART2) /* UART2 device driver structure */ static struct mm32_uart uart2; struct rt_serial_device serial2; void UART2_IRQHandler(void) { struct mm32_uart *uart; uart = &uart2; /* enter interrupt */ rt_interrupt_enter(); if (UART_GetITStatus(uart->uart, UART_IT_RXIEN) != RESET) { UART_ClearITPendingBit(uart->uart, UART_IT_RXIEN); rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND); } if (UART_GetITStatus(uart->uart, UART_IT_TXIEN) != RESET) { /* clear interrupt */ UART_ClearITPendingBit(uart->uart, UART_IT_TXIEN); } /* leave interrupt */ rt_interrupt_leave(); } #endif /* BSP_USING_UART2 */ #ifdef BSP_USING_UART1 static void UART1PINconfigStepA(void) { /* Enable UART clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_UART1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); } static void UART1PINconfigStepB(void) { GPIO_InitTypeDef GPIO_InitStructure; /* Configure USART Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); } #endif #ifdef BSP_USING_UART2 static void UART2PINconfigStepA(void) { /* Enable UART clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); } static void UART2PINconfigStepB(void) { GPIO_InitTypeDef GPIO_InitStructure; /* Configure USART Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); } #endif int rt_hw_uart_init(void) { struct mm32_uart *uart; struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; #ifdef BSP_USING_UART1 UART1PINconfigStepA(); uart = &uart1; uart->uart = UART1; uart->irq = UART1_IRQn; config.baud_rate = BAUD_RATE_115200; serial1.ops = &mm32_uart_ops; serial1.config = config; /* register UART1 device */ rt_hw_serial_register(&serial1, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart); UART1PINconfigStepB(); #endif /* BSP_USING_UART1 */ #ifdef BSP_USING_UART2 UART2PINconfigStepA(); uart = &uart2; uart->uart = UART2; uart->irq = UART2_IRQn; config.baud_rate = BAUD_RATE_115200; serial2.ops = &mm32_uart_ops; serial2.config = config; /* register UART2 device */ rt_hw_serial_register(&serial2, "uart2", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart); UART2PINconfigStepB(); #endif /* BSP_USING_UART2 */ return 0; } INIT_BOARD_EXPORT(rt_hw_uart_init);