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- /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2021-10-02 spaceman first version
- */
- #include <rtthread.h>
- #include <rtdevice.h>
- #include <board.h>
- #include "drv_uart.h"
- #ifdef RT_USING_SERIAL
- //#define DRV_DEBUG
- #define LOG_TAG "drv.uart"
- #include <drv_log.h>
- #if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && !defined(BSP_USING_UART3) && \
- !defined(BSP_USING_UART4)
- #error "Please define at least one BSP_USING_UARTx"
- /* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
- #endif
- /* UART1 */
- #define UART1_GPIO_TX GPIO_Pin_9
- #define UART1_GPIO_RX GPIO_Pin_10
- #define UART1_GPIO_AF GPIO_AF_UART_1
- #define UART1_GPIO GPIOA
- /* UART2 */
- #define UART2_GPIO_TX GPIO_Pin_2
- #define UART2_GPIO_RX GPIO_Pin_3
- #define UART2_GPIO_AF GPIO_AF_UART_2345
- #define UART2_GPIO GPIOA
- static rt_err_t tkm32_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
- {
- struct tkm32_uart *uart;
- UART_InitTypeDef UART_InitStructure;
- RT_ASSERT(serial != RT_NULL);
- RT_ASSERT(cfg != RT_NULL);
- uart = (struct tkm32_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 tkm32_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
- {
- struct tkm32_uart *uart;
- RT_ASSERT(serial != RT_NULL);
- uart = (struct tkm32_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 tkm32_uart_putc(struct rt_serial_device *serial, char c)
- {
- struct tkm32_uart *uart;
- RT_ASSERT(serial != RT_NULL);
- uart = (struct tkm32_uart *)serial->parent.user_data;
- while ((uart->uart->CSR & UART_IT_TXIEN) == 0);
- uart->uart->TDR = (c & (uint16_t)0x00FF);
- return 1;
- }
- static int tkm32_uart_getc(struct rt_serial_device *serial)
- {
- int ch;
- struct tkm32_uart *uart;
- RT_ASSERT(serial != RT_NULL);
- uart = (struct tkm32_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 tkm32_uart_ops =
- {
- tkm32_uart_configure,
- tkm32_uart_control,
- tkm32_uart_putc,
- tkm32_uart_getc,
- };
- #if defined(BSP_USING_UART1)
- /* UART1 device driver structure */
- static struct tkm32_uart uart1;
- struct rt_serial_device serial1;
- void UART1_IRQHandler(void)
- {
- struct tkm32_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 tkm32_uart uart2;
- struct rt_serial_device serial2;
- void UART2_IRQHandler(void)
- {
- struct tkm32_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_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_UART1, ENABLE);
- }
- static void UART1PINconfigStepB(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- /* Configure USART Rx/tx PIN */
- GPIO_InitStructure.GPIO_Pin = UART1_GPIO_TX;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_Pin = UART1_GPIO_RX;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
- GPIO_PinAFConfig(UART1_GPIO, UART1_GPIO_TX | UART1_GPIO_RX, UART1_GPIO_AF);
- UART_ClearITPendingBit(UART1, 0xFF);
- }
- #endif
- #ifdef BSP_USING_UART2
- static void UART2PINconfigStepA(void)
- {
- /* Enable UART clock */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART2, ENABLE);
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
- }
- static void UART2PINconfigStepB(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- /* Configure USART Rx/tx PIN */
- GPIO_InitStructure.GPIO_Pin = UART2_GPIO_TX;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_Pin = UART2_GPIO_RX;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
- GPIO_PinAFConfig(UART2_GPIO, UART2_GPIO_TX | UART2_GPIO_RX, UART2_GPIO_AF);
- UART_ClearITPendingBit(UART2, 0xFF);
- }
- #endif
- int rt_hw_uart_init(void)
- {
- struct tkm32_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 = &tkm32_uart_ops;
- serial1.config = config;
- /* register UART1 device */
- rt_hw_serial_register(&serial1, "uart1",
- RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
- 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 = &tkm32_uart_ops;
- serial2.config = config;
- /* register UART2 device */
- rt_hw_serial_register(&serial2, "uart2",
- RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
- uart);
- UART2PINconfigStepB();
- #endif /* BSP_USING_UART2 */
- return 0;
- }
- INIT_BOARD_EXPORT(rt_hw_uart_init);
- #endif /* RT_USING_SERIAL */
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