GD32F450VET6串口IRDA功能接受数据正确，发送数据错误

只看该作者 · 2021-6-17 12:19

本帖最后由封弊账号于 2021-6-17 12:24 编辑

硬件连接如上图所示

实际连接单片机串口连接TFD4101,电脑串口连接红外头
软件相关设置
串口1开启irda功能，特殊设置都在下面函数中，正常设置都在gd_eval_com_init中
void all_usart_config(void)
{
//  config baud rate
gd_eval_com_init(EVAL_COM1, 9600U);
gd_eval_com_init(EVAL_COM2, 9600U);
gd_eval_com_init(EVAL_COM3, 9600U);
gd_eval_com_init(EVAL_COM4, 9600U);
gd_eval_com_init(EVAL_COM5, 9600U);
gd_eval_com_init(EVAL_COM6, 9600U);
gd_eval_com_init(EVAL_COM7, 9600U);
//  config USART interrupt the pre-emption priority
nvic_irq_enable(USART0_IRQn, 1, 0); //  the pre-emption priority needed to set
nvic_irq_enable(USART1_IRQn, 0, 1); //  the pre-emption priority needed to set
nvic_irq_enable(USART2_IRQn, 1, 2); //  the pre-emption priority needed to set
nvic_irq_enable(UART3_IRQn, 1, 3);  //  the pre-emption priority needed to set
nvic_irq_enable(USART5_IRQn, 1, 4); //  the pre-emption priority needed to set
nvic_irq_enable(UART6_IRQn, 1, 5);  //  the pre-emption priority needed to set
nvic_irq_enable(UART7_IRQn, 1, 6);  //  the pre-emption priority needed to set
//  enable USART TBE interrupt
usart_interrupt_enable(USART0, USART_INTEN_RBNEIE);

//usart_irda_mode_enable(USART1);
usart_word_length_set(USART1,USART_WL_8BIT);
usart_data_first_config(USART1, USART_MSBF_MSB);
//usart_stop_bit_set(USART1, USART_STB_1BIT);
usart_parity_config(USART1, USART_PM_NONE);
usart_irda_lowpower_config(USART1,USART_IRLP_NORMAL);
usart_prescaler_config(USART1,0x01);
//usart_invert_config(USART1,USART_DINV_DISABLE);
usart_irda_mode_enable(USART1);
usart_lin_mode_disable(USART1);
usart_synchronous_clock_disable(USART1);
usart_halfduplex_disable(USART1);
usart_smartcard_mode_disable(USART1);

usart_interrupt_enable(USART1, USART_INTEN_RBNEIE);

usart_interrupt_enable(USART2, USART_INTEN_RBNEIE);
usart_interrupt_enable(UART3, USART_INTEN_RBNEIE);
usart_interrupt_enable(USART5, USART_INTEN_RBNEIE);
usart_interrupt_enable(UART6, USART_INTEN_RBNEIE);
usart_interrupt_enable(UART7, USART_INTEN_RBNEIE);
}

正常串口初始化，引脚模式、波特率等都在这里
void gd_eval_com_init(uint32_t com, uint32_t baudval)
{
/* enable GPIO clock */
uint32_t COM_ID;
//if(EVAL_COM1 == com)
//{
// COM_ID = 0U;
//}
switch(com) //  ÔÚÒ»¸ö´®¿ÚµÄ»ù´¡ÉÏÔö¼Ó
{
      case EVAL_COM1:
         COM_ID = 0U;
         break;
      case EVAL_COM2:
         COM_ID = 1U;
         break;
      case EVAL_COM3:
         COM_ID = 2U;
         break;
      case EVAL_COM4:
         COM_ID = 3U;
         break;
      case EVAL_COM5:
         COM_ID = 4U;
         break;
      case EVAL_COM6:
         COM_ID = 5U;
         break;
      case EVAL_COM7:
         COM_ID = 6U;
         break;
      default:
         break;
}
//rcu_periph_clock_enable( EVAL_COM_GPIO_CLK);
rcu_periph_clock_enable(COM_GPIO_CLK[COM_ID]);

/* enable USART clock */
rcu_periph_clock_enable(COM_CLK[COM_ID]);

/* connect port to USARTx_Tx */
//gpio_af_set(EVAL_COM_GPIO_PORT, EVAL_COM_AF, COM_TX_PIN[COM_ID]); //  set GPIO alternate function
gpio_af_set(COM_GPIO_PORT[COM_ID], COM_AF[COM_ID], COM_TX_PIN[COM_ID]); //  set GPIO alternate function

/* connect port to USARTx_Rx */
//gpio_af_set(EVAL_COM_GPIO_PORT, EVAL_COM_AF, COM_RX_PIN[COM_ID]);
gpio_af_set(COM_GPIO_PORT[COM_ID], COM_AF[COM_ID], COM_RX_PIN[COM_ID]);

/* configure USART Tx as alternate function push-pull */
//gpio_mode_set(EVAL_COM_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP,COM_TX_PIN[COM_ID]);
gpio_mode_set(COM_GPIO_PORT[COM_ID], GPIO_MODE_AF, GPIO_PUPD_PULLDOWN,COM_TX_PIN[COM_ID]);
//gpio_output_options_set(EVAL_COM_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_TX_PIN[COM_ID]);
gpio_output_options_set(COM_GPIO_PORT[COM_ID], GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_TX_PIN[COM_ID]);

/* configure USART Rx as alternate function push-pull */
//gpio_mode_set(EVAL_COM_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP,COM_RX_PIN[COM_ID]);
gpio_mode_set(COM_GPIO_PORT[COM_ID], GPIO_MODE_AF, GPIO_PUPD_PULLDOWN,COM_RX_PIN[COM_ID]);
//gpio_output_options_set(EVAL_COM_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_RX_PIN[COM_ID]);
gpio_output_options_set(COM_GPIO_PORT[COM_ID], GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,COM_RX_PIN[COM_ID]);

/* USART configure */
usart_deinit(com);
usart_baudrate_set(com,baudval);
usart_stop_bit_set(com, USART_STB_1BIT);
usart_receive_config(com, USART_RECEIVE_ENABLE);
usart_transmit_config(com, USART_TRANSMIT_ENABLE);

usart_enable(com);
}

串口1中断，直接自发自首
void USART1_IRQHandler(void)
{
uint16_t gd_usart1_receive_data;
if((RESET != usart_interrupt_flag_get(USART1, USART_INT_RBNEIE)) &&
   (RESET != usart_flag_get(USART1, USART_FLAG_RBNE)))
{
      /* receive data */
      gd_usart1_receive_data = (usart_data_receive(USART1) & 0xFF);
      usart_data_transmit(USART1,gd_usart1_receive_data);
}
}

串口1发送函数
void usart_data_transmit(uint32_t usart_periph, uint32_t data)
{
USART_DATA(usart_periph) = ((uint16_t)USART_DATA_DATA & data);
while (RESET == usart_flag_get(usart_periph,USART_FLAG_TBE));
}

串口调试界面发送0xeb后回0xeb发送0x90回复0x70有时还0x50

接受全部正常，发送数据错误