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rt-thread-official/bsp/wch/risc-v/Libraries/ch32_drivers/drv_usart.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-08-27 liYony the first version
*/
#include "board.h"
#include <rtdevice.h>
#include <drv_usart.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) && \
!defined(BSP_USING_UART5) && !defined(BSP_USING_UART6) && !defined(BSP_USING_UART7) && !defined(BSP_USING_UART8)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
enum
{
#ifdef BSP_USING_UART1
UART1_INDEX,
#endif
#ifdef BSP_USING_UART2
UART2_INDEX,
#endif
#ifdef BSP_USING_UART3
UART3_INDEX,
#endif
#ifdef BSP_USING_UART4
UART4_INDEX,
#endif
#ifdef BSP_USING_UART5
UART5_INDEX,
#endif
#ifdef BSP_USING_UART6
UART6_INDEX,
#endif
#ifdef BSP_USING_UART7
UART7_INDEX,
#endif
#ifdef BSP_USING_UART8
UART8_INDEX,
#endif
};
/* If you want to use other serial ports, please follow UART1 to complete other
serial ports. For clock configuration, */
static struct ch32_uart_hw_config uart_hw_config[] =
{
#ifdef BSP_USING_UART1
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB2Periph_USART1, RCC_APB2Periph_GPIOA,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOA, GPIO_Pin_9, /* Tx */GPIOA, GPIO_Pin_10, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART2
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_USART2, RCC_APB2Periph_GPIOA,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOA, GPIO_Pin_2, /* Tx */GPIOA, GPIO_Pin_3, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART3
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_USART3, RCC_APB2Periph_GPIOB,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOB, GPIO_Pin_10, /* Tx */GPIOB, GPIO_Pin_11, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART4
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_UART4, RCC_APB2Periph_GPIOC,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOC, GPIO_Pin_10, /* Tx */GPIOC, GPIO_Pin_11, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART5
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_UART5, RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOC, GPIO_Pin_12, /* Tx */GPIOD, GPIO_Pin_2, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART6
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_UART6, RCC_APB2Periph_GPIOC,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOC, GPIO_Pin_0, /* Tx */GPIOC, GPIO_Pin_1, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART7
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_UART7, RCC_APB2Periph_GPIOC,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOC, GPIO_Pin_2, /* Tx */GPIOC, GPIO_Pin_3, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
#ifdef BSP_USING_UART8
{
/* clock configuration, please refer to ch32v30x_rcc.h */
RCC_APB1Periph_UART8, RCC_APB2Periph_GPIOC,
/* GPIO configuration : TX_Port,TX_Pin, RX_Port,RX_Pin */
GPIOC, GPIO_Pin_4, /* Tx */GPIOC, GPIO_Pin_5, /* Rx */
/* Whether to enable port remapping, you can refer to ch32v30x_gpio.h file,
for example, USART1 needs to be turned on, you can use GPIO_Remap_USART1 */
GPIO_Remap_NONE,
},
#endif
};
static struct ch32_uart_config uart_config[] =
{
#ifdef BSP_USING_UART1
{
"uart1",
USART1,
USART1_IRQn,
},
#endif
#ifdef BSP_USING_UART2
{
"uart2",
USART2,
USART2_IRQn,
},
#endif
#ifdef BSP_USING_UART3
{
"uart3",
USART3,
USART3_IRQn,
},
#endif
#ifdef BSP_USING_UART4
{
"uart4",
UART4,
UART4_IRQn,
},
#endif
#ifdef BSP_USING_UART5
{
"uart5",
UART5,
UART5_IRQn,
},
#endif
#ifdef BSP_USING_UART6
{
"uart6",
UART6,
UART6_IRQn,
},
#endif
#ifdef BSP_USING_UART7
{
"uart7",
UART7,
UART7_IRQn,
},
#endif
#ifdef BSP_USING_UART8
{
"uart8",
UART8,
UART8_IRQn,
},
#endif
};
static struct ch32_uart uart_obj[sizeof(uart_config) / sizeof(uart_config[0])] = {0};
static rt_err_t ch32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct ch32_uart *uart;
GPIO_InitTypeDef GPIO_InitStructure={0};
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct ch32_uart *) serial->parent.user_data;
uart->Init.USART_BaudRate = cfg->baud_rate;
uart->Init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
uart->Init.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
switch (cfg->data_bits)
{
case DATA_BITS_8:
uart->Init.USART_WordLength = USART_WordLength_8b;
break;
case DATA_BITS_9:
uart->Init.USART_WordLength = USART_WordLength_9b;
break;
default:
uart->Init.USART_WordLength = USART_WordLength_8b;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart->Init.USART_StopBits = USART_StopBits_1;
break;
case STOP_BITS_2:
uart->Init.USART_StopBits = USART_StopBits_2;
break;
default:
uart->Init.USART_StopBits = USART_StopBits_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
uart->Init.USART_Parity = USART_Parity_No;
break;
case PARITY_ODD:
uart->Init.USART_Parity = USART_Parity_Odd;
break;
case PARITY_EVEN:
uart->Init.USART_Parity = USART_Parity_Even;
break;
default:
uart->Init.USART_Parity = USART_Parity_No;
break;
}
/* UART hardware configuration, including clock and GPIO, etc. */
RCC_APB2PeriphClockCmd(uart->hw_config->gpio_periph_clock, ENABLE);
if(uart->config->Instance == USART1)
{
RCC_APB2PeriphClockCmd(uart->hw_config->uart_periph_clock, ENABLE);
}
else
{
RCC_APB1PeriphClockCmd(uart->hw_config->uart_periph_clock, ENABLE);
}
if(uart->hw_config->remap != GPIO_Remap_NONE)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(uart->hw_config->remap, ENABLE);
}
GPIO_InitStructure.GPIO_Pin = uart->hw_config->tx_gpio_pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(uart->hw_config->tx_gpio_port, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = uart->hw_config->rx_gpio_pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(uart->hw_config->rx_gpio_port, &GPIO_InitStructure);
USART_Init(uart->config->Instance,&uart->Init);
USART_Cmd(uart->config->Instance, ENABLE);
return RT_EOK;
}
static rt_err_t ch32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct ch32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct ch32_uart *)serial->parent.user_data;
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->config->irq_type);
/* disable interrupt */
USART_ITConfig(uart->config->Instance,USART_IT_RXNE,DISABLE);
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->config->irq_type);
/* enable interrupt */
USART_ITConfig(uart->config->Instance, USART_IT_RXNE,ENABLE);
break;
}
return RT_EOK;
}
static int ch32_putc(struct rt_serial_device *serial, char c)
{
struct ch32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct ch32_uart *)serial->parent.user_data;
while (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_TC) == RESET);
uart->config->Instance->DATAR = c;
return 1;
}
static int ch32_getc(struct rt_serial_device *serial)
{
int ch;
struct ch32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct ch32_uart *)serial->parent.user_data;
ch = -1;
if (USART_GetFlagStatus(uart->config->Instance, USART_FLAG_RXNE) != RESET)
{
ch = uart->config->Instance->DATAR & 0xff;
}
return ch;
}
rt_size_t ch32dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
{
return RT_EOK;
}
static void uart_isr(struct rt_serial_device *serial)
{
struct ch32_uart *uart = (struct ch32_uart *) serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
if (USART_GetITStatus(uart->config->Instance, USART_IT_RXNE) != RESET)
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
USART_ClearITPendingBit(uart->config->Instance, USART_IT_RXNE);
}
}
static const struct rt_uart_ops ch32_uart_ops =
{
ch32_configure,
ch32_control,
ch32_putc,
ch32_getc,
ch32dma_transmit
};
#ifdef BSP_USING_UART1
void USART1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void USART1_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART1_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART2
void USART2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void USART2_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART2_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART3
void USART3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void USART3_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART3_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART4
void UART4_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void UART4_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART4_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART5
void UART5_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void UART5_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART5_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART6
void UART6_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void UART6_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART6_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART7
void UART7_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void UART7_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART7_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
#ifdef BSP_USING_UART8
void UART8_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void UART8_IRQHandler(void)
{
GET_INT_SP();
rt_interrupt_enter();
uart_isr(&(uart_obj[UART8_INDEX].serial));
rt_interrupt_leave();
FREE_INT_SP();
}
#endif
int rt_hw_usart_init(void)
{
rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct ch32_uart);
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
rt_err_t result = 0;
for (int i = 0; i < obj_num; i++)
{
/* init UART object */
uart_obj[i].config = &uart_config[i];
uart_obj[i].hw_config = &uart_hw_config[i];
uart_obj[i].serial.ops = &ch32_uart_ops;
uart_obj[i].serial.config = config;
/* Hardware initialization is required, otherwise it
will not be registered into the device framework */
if(uart_obj[i].hw_config->gpio_periph_clock == 0)
{
LOG_E("You did not perform hardware initialization for %s", uart_obj[i].config->name);
continue;
}
if(uart_obj[i].hw_config->uart_periph_clock == 0)
{
LOG_E("You did not perform hardware initialization for %s", uart_obj[i].config->name);
continue;
}
/* register UART device */
result = rt_hw_serial_register(&uart_obj[i].serial, uart_obj[i].config->name,
RT_DEVICE_FLAG_RDWR
| RT_DEVICE_FLAG_INT_RX
, &uart_obj[i]);
RT_ASSERT(result == RT_EOK);
}
return result;
}
#endif /* RT_USING_SERIAL */
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