254 lines
6.8 KiB
C
254 lines
6.8 KiB
C
/*
|
|
* Copyright (c) 2006-2020, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-01-06 shelton first version
|
|
*/
|
|
|
|
#include <board.h>
|
|
#include "drv_usart.h"
|
|
|
|
#ifdef RT_USING_SERIAL
|
|
#if !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2)
|
|
#error "Please define at least one BSP_USING_UARTx"
|
|
/* this driver can be disabled at menuconfig ¡ú RT-Thread Components ¡ú Device Drivers */
|
|
#endif
|
|
|
|
struct at32_usart {
|
|
char *name;
|
|
USART_Type* usartx;
|
|
IRQn_Type irqn;
|
|
struct rt_serial_device serial;
|
|
};
|
|
|
|
enum {
|
|
#ifdef BSP_USING_UART1
|
|
USART1_INDEX,
|
|
#endif
|
|
#ifdef BSP_USING_UART2
|
|
USART2_INDEX,
|
|
#endif
|
|
};
|
|
|
|
static struct at32_usart usart_config[] = {
|
|
#ifdef BSP_USING_UART1
|
|
{ "uart1",
|
|
USART1,
|
|
USART1_IRQn, },
|
|
#endif
|
|
#ifdef BSP_USING_UART2
|
|
{ "uart2",
|
|
USART2,
|
|
USART2_IRQn, },
|
|
#endif
|
|
};
|
|
|
|
static rt_err_t at32_configure(struct rt_serial_device *serial,
|
|
struct serial_configure *cfg) {
|
|
struct at32_usart *usart_instance = (struct at32_usart *) serial->parent.user_data;
|
|
USART_InitType USART_InitStructure;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
RT_ASSERT(cfg != RT_NULL);
|
|
|
|
RT_ASSERT(usart_instance != RT_NULL);
|
|
|
|
at32_msp_usart_init((void *)usart_instance->usartx);
|
|
|
|
USART_StructInit(&USART_InitStructure);
|
|
|
|
USART_Reset(usart_instance->usartx);
|
|
USART_InitStructure.USART_BaudRate = cfg->baud_rate;
|
|
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
|
|
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
|
|
|
|
switch (cfg->data_bits) {
|
|
case DATA_BITS_8:
|
|
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
|
|
break;
|
|
|
|
case DATA_BITS_9:
|
|
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
|
|
break;
|
|
default:
|
|
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
|
|
break;
|
|
}
|
|
|
|
switch (cfg->stop_bits) {
|
|
case STOP_BITS_1:
|
|
USART_InitStructure.USART_StopBits = USART_StopBits_1;
|
|
break;
|
|
case STOP_BITS_2:
|
|
USART_InitStructure.USART_StopBits = USART_StopBits_2;
|
|
break;
|
|
default:
|
|
USART_InitStructure.USART_StopBits = USART_StopBits_1;
|
|
break;
|
|
}
|
|
|
|
switch (cfg->parity) {
|
|
case PARITY_NONE:
|
|
USART_InitStructure.USART_Parity = USART_Parity_No;
|
|
break;
|
|
case PARITY_ODD:
|
|
USART_InitStructure.USART_Parity = USART_Parity_Odd;
|
|
break;
|
|
case PARITY_EVEN:
|
|
USART_InitStructure.USART_Parity = USART_Parity_Even;
|
|
break;
|
|
default:
|
|
USART_InitStructure.USART_Parity = USART_Parity_No;
|
|
break;
|
|
}
|
|
USART_Init(usart_instance->usartx, &USART_InitStructure);
|
|
USART_Cmd(usart_instance->usartx, ENABLE);
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_err_t at32_control(struct rt_serial_device *serial, int cmd,
|
|
void *arg) {
|
|
struct at32_usart *usart;
|
|
|
|
NVIC_InitType NVIC_InitStruct;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
usart = (struct at32_usart *) serial->parent.user_data;
|
|
RT_ASSERT(usart != RT_NULL);
|
|
|
|
NVIC_InitStruct.NVIC_IRQChannel = usart->irqn;
|
|
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
|
|
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
|
|
|
|
switch (cmd) {
|
|
case RT_DEVICE_CTRL_CLR_INT:
|
|
NVIC_InitStruct.NVIC_IRQChannelCmd = DISABLE;
|
|
NVIC_Init(&NVIC_InitStruct);
|
|
USART_INTConfig(usart->usartx, USART_INT_RDNE, DISABLE);
|
|
break;
|
|
case RT_DEVICE_CTRL_SET_INT:
|
|
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStruct);
|
|
USART_INTConfig(usart->usartx, USART_INT_RDNE, ENABLE);
|
|
break;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static int at32_putc(struct rt_serial_device *serial, char ch) {
|
|
struct at32_usart *usart;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
usart = (struct at32_usart *) serial->parent.user_data;
|
|
RT_ASSERT(usart != RT_NULL);
|
|
|
|
USART_SendData(usart->usartx, (uint8_t) ch);
|
|
while (USART_GetFlagStatus(usart->usartx, USART_FLAG_TDE) == RESET);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int at32_getc(struct rt_serial_device *serial) {
|
|
int ch;
|
|
struct at32_usart *usart;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
usart = (struct at32_usart *) serial->parent.user_data;
|
|
RT_ASSERT(usart != RT_NULL);
|
|
|
|
ch = -1;
|
|
if (RESET != USART_GetFlagStatus(usart->usartx, USART_FLAG_RDNE)) {
|
|
ch = USART_ReceiveData(usart->usartx) & 0xff;
|
|
}
|
|
|
|
return ch;
|
|
}
|
|
|
|
static const struct rt_uart_ops at32_usart_ops = {
|
|
at32_configure,
|
|
at32_control,
|
|
at32_putc,
|
|
at32_getc,
|
|
RT_NULL };
|
|
|
|
static void usart_isr(struct rt_serial_device *serial) {
|
|
struct at32_usart *usart_instance;
|
|
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
usart_instance = (struct at32_usart *) serial->parent.user_data;
|
|
RT_ASSERT(usart_instance != RT_NULL);
|
|
|
|
if ((USART_GetITStatus(usart_instance->usartx, USART_INT_RDNE) != RESET) \
|
|
&& (RESET != USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_RDNE))) {
|
|
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
|
|
USART_ClearITPendingBit(usart_instance->usartx, USART_INT_RDNE);
|
|
USART_ClearFlag(usart_instance->usartx, USART_FLAG_RDNE);
|
|
} else {
|
|
if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_CTSF) != RESET) {
|
|
USART_ClearFlag(usart_instance->usartx, USART_FLAG_CTSF);
|
|
}
|
|
|
|
if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_LBDF) != RESET) {
|
|
USART_ClearFlag(usart_instance->usartx, USART_FLAG_LBDF);
|
|
}
|
|
|
|
if (USART_GetFlagStatus(usart_instance->usartx, USART_FLAG_TRAC) != RESET) {
|
|
USART_ClearFlag(usart_instance->usartx, USART_FLAG_TRAC);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef BSP_USING_UART1
|
|
void USART1_IRQHandler(void) {
|
|
rt_interrupt_enter();
|
|
|
|
usart_isr(&usart_config[USART1_INDEX].serial);
|
|
|
|
rt_interrupt_leave();
|
|
}
|
|
#endif
|
|
#ifdef BSP_USING_UART2
|
|
void USART2_IRQHandler(void) {
|
|
rt_interrupt_enter();
|
|
|
|
usart_isr(&usart_config[USART2_INDEX].serial);
|
|
|
|
rt_interrupt_leave();
|
|
}
|
|
#endif
|
|
|
|
int rt_hw_usart_init(void) {
|
|
rt_size_t obj_num;
|
|
int index;
|
|
|
|
obj_num = sizeof(usart_config) / sizeof(struct at32_usart);
|
|
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
|
|
rt_err_t result = 0;
|
|
|
|
for (index = 0; index < obj_num; index++) {
|
|
usart_config[index].serial.ops = &at32_usart_ops;
|
|
usart_config[index].serial.config = config;
|
|
|
|
/* register UART device */
|
|
result = rt_hw_serial_register(&usart_config[index].serial,
|
|
usart_config[index].name,
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX
|
|
| RT_DEVICE_FLAG_INT_TX, &usart_config[index]);
|
|
RT_ASSERT(result == RT_EOK);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
INIT_BOARD_EXPORT(rt_hw_usart_init);
|
|
|
|
#endif /* BSP_USING_SERIAL */
|
|
|
|
/******************** end of file *******************/
|