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rt-thread-official/bsp/tkm32F499/drivers/drv_uart.c

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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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