GD32F303串口调试记录

只看该作者 · 2025-6-9 19:19

1. 串口初始化

void BSP_USART0_Init(void)
{
/* enable GPIO clock */
rcu_periph_clock_enable(RCU_GPIOA);

/* enable USART clock */
rcu_periph_clock_enable(RCU_USART0);

/* connect port to USARTx_Tx */
gpio_init(USART0_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, USART0_TX_PIN);

/* connect port to USARTx_Rx */
gpio_init(USART0_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, USART0_RX_PIN);

/* configure USART */
usart_deinit(USART0);
usart_baudrate_set(USART0, 9600);
usart_word_length_set(USART0, USART_WL_8BIT);
usart_stop_bit_set(USART0, USART_STB_1BIT);
usart_parity_config(USART0, USART_PM_NONE);
usart_receive_config(USART0, USART_RECEIVE_ENABLE);
usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
usart_enable(USART0);

usart_receiver_timeout_enable(USART0);
usart_receiver_timeout_threshold_config(USART0, 300);
nvic_irq_enable(USART0_IRQn, 0, 0);
usart_interrupt_enable(USART0, USART_INT_RBNE);//接收中断
usart_interrupt_enable(USART0, USART_INT_RT);//超时中断

}

2. 串口中断

void USART0_IRQHandler(void)
{
if(usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE) != RESET) //开始接受数据
{
/* receive data */
usart0msg.recv_buff[usart0msg.recv_index] = usart_data_receive(USART0);
usart0msg.recv_index++;
if(usart0msg.recv_index>=1500)
{
usart0msg.recv_index=0;
}
usart_interrupt_flag_clear(USART0, USART_INT_FLAG_RBNE);
}

if(usart_interrupt_flag_get(USART0, USART_INT_FLAG_RT) != RESET) //接收数据完成
{
usart0msg.recv_flag = 1;
usart_interrupt_flag_clear(USART0, USART_INT_FLAG_RT);
}
}

3. 串口单字节发送

void BSP_USART0_Send_data(uint8_t ch)
{
usart_data_transmit(USART0, (uint8_t)ch);
while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
}

4. 串口数组发送

void BSP_USART0_SendBuf(uint8_t *pdata, uint8_t len)
{
uint8_t i = 0;
for(i = 0;i < len;i++)
{
BSP_USART0_Send_data(pdata[i]);
}
}

5. 串口字符串发送

void BSP_USART0_SendString(char *pdata, uint8_t len)
{
uint8_t i = 0;
for(i = 0;i < len;i++)
{
BSP_USART0_Send_data(pdata[i]);
}
}

串口配置时，串口中断中没有用到的中断标志，不要在配置中打开，否则会造成卡死在串口中断里

usart_receiver_timeout_enable(UART3);
usart_receiver_timeout_threshold_config(UART3, 300);
nvic_irq_enable(UART3_IRQn, 0, 0);
usart_interrupt_enable(UART3, USART_INT_RBNE);//接收中断
usart_interrupt_enable(UART3, USART_INT_RT);//超时中断
usart_interrupt_enable(UART3, USART_INT_TC);

例如这个配置使能了TC

void UART3_IRQHandler(void)
{
if(usart_interrupt_flag_get(UART3, USART_INT_FLAG_RBNE) != RESET) //开始接受数据
{
/* receive data */
uart3msg.recv_buff[uart3msg.recv_index] = usart_data_receive(UART3);
uart3msg.recv_index++;
if(uart3msg.recv_index>=1500)
{
uart3msg.recv_index=0;
}
usart_interrupt_flag_clear(UART3, USART_INT_FLAG_RBNE);
}

if(usart_interrupt_flag_get(UART3, USART_INT_FLAG_RT) != RESET) //接收数据完成
{
uart3msg.recv_flag = 1;
usart_interrupt_flag_clear(UART3, USART_INT_FLAG_RT);
}

// if(usart_interrupt_flag_get(UART3, USART_INT_FLAG_TC) != RESET) //发送数据完成
// {
// usart_interrupt_flag_clear(UART3, USART_INT_FLAG_TC);
// }
}

但是在中断中并没有使用TC，就会造成卡死在中断里的现象
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原文链接：https://blog.csdn.net/m0_53961291/article/details/145260449

只看该作者 · 2025-6-9 21:59

串口是最基础的通信接口，是调试的打印终端。

只看该作者 · 2025-6-10 08:15

串口应该是MCU最常用得外设了