diff options
Diffstat (limited to 'bsp/tkm32F499/drivers/drv_uart.c')
| -rw-r--r-- | bsp/tkm32F499/drivers/drv_uart.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/bsp/tkm32F499/drivers/drv_uart.c b/bsp/tkm32F499/drivers/drv_uart.c new file mode 100644 index 0000000000..336367d9be --- /dev/null +++ b/bsp/tkm32F499/drivers/drv_uart.c @@ -0,0 +1,254 @@ +/* + * 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 */ |