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GD32E230用捕获及485通讯，开启捕获就通讯卡死且初始化失败

1910506742025-07-05

GD32E230C8T6 用TIMER2_CH3进行频率捕获，同时用USART0进行485通讯，一开启捕获就通讯不了，且一点仿真DEBUG按钮就直接全速运行，然后就卡死在LDR    R0, =SystemInit位置，无法初始化。具体代码如下：
int main(void){
   systick_config();             //滴答定时器初始化

   Led_Gpio_Init();             //数码管引脚初始化

   Key_Init();                   //按键引脚初始化

   Relay_GPIO_Init();             //继电器引脚初始化

   Capture_Gpio_config();       //捕获引脚初始化

   usart_config(9600);          //串口配置

   Para_Read();                   //读取参数

   LedPower = 1;                //电源灯亮

   Adc_gpio_config();             //ADC采样引脚初始化

   Adc_Config();                //ADC参数配置初始化

   Nvic_config();                //捕获中断

   Timer2_config();             //Timer2配置

   Timer5_Init(3600,40);       //定时10ms = 3600/72M *200
   Timer14_Init(36,625);       //定时312.5us

while(1)
{
      Adc_Cal();             //ADC采样计算

      fre_capture_cal();

      KeyMake();             //按键动作
      Protect();

      Display();             //显示

      UartDriver();
}
}

void Capture_Gpio_config(void)
{
/* 使能GPIOB时钟 */
rcu_periph_clock_enable(RCU_GPIOB);
/* 配置PB1(TIMER2_CH3)为复用功能 */
gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_1);
gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_1); // 根据数据手册选择正确的AF
}

/*
*********************************************************************************************************
* 函数名: nvic_config
* 功能说明: 配置中断优先级
* 形参：无
* 返回值: 无
*********************************************************************************************************
*/
void Nvic_config(void)
{
nvic_irq_enable(TIMER2_IRQn,0);
}

/*
*********************************************************************************************************
* 函数名: timer2_config
* 功能说明: 定时器配置--捕获
* 形参：无
* 返回值: 无
*********************************************************************************************************
*/
void Timer2_config(void)
{
timer_ic_parameter_struct timer_icinitpara;
timer_parameter_struct timer_initpara;

/* enable the TIMER clock */
rcu_periph_clock_enable(RCU_TIMER2);
/* disable a TIMER */
timer_deinit(TIMER2);
/* initialize TIMER init parameter struct */
timer_struct_para_init(&timer_initpara);
/* TIMER2 configuration */
timer_initpara.prescaler       = 7199;
timer_initpara.alignedmode    = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection  = TIMER_COUNTER_UP;
timer_initpara.period          = 65535;
timer_initpara.clockdivision    = TIMER_CKDIV_DIV1;
timer_init(TIMER2, &timer_initpara);

/* TIMER2  configuration */
/* initialize TIMER channel input parameter struct */
timer_channel_input_struct_para_init(&timer_icinitpara);
/* TIMER2 CH3 input capture configuration */
timer_icinitpara.icpolarity  = TIMER_IC_POLARITY_RISING;          //此处采用下降沿捕获， TIMER_IC_POLARITY_RISING
timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI;
timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
timer_icinitpara.icfilter = 0x0;
timer_input_capture_config(TIMER2,TIMER_CH_3,&timer_icinitpara);

/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER2);

/* clear channel 3 interrupt bit */
timer_interrupt_flag_clear(TIMER2,TIMER_INT_FLAG_CH3 );

/* clear channel 3 interrupt bit */
timer_interrupt_flag_clear(TIMER2,TIMER_INT_FLAG_UP );

/* channel 3 interrupt enable */
timer_interrupt_enable(TIMER2,TIMER_INT_CH3);

/* channel 3 interrupt enable */
timer_interrupt_enable(TIMER2,TIMER_INT_UP);

/* TIMER2 counter enable */
timer_enable(TIMER2);
}

/*
*********************************************************************************************************
* 函数名: TIM2_IRQHandler
* 功能说明: TIM2 中断服务程序
* 形参：无
* 返回值: 无 1us
*********************************************************************************************************
*/
void TIMER2_IRQHandler(void)
{
if(timer_interrupt_flag_get(TIMER2,TIMER_INT_FLAG_CH3))
{
      timer_interrupt_flag_clear(TIMER2,TIMER_INT_FLAG_CH3);  //清除TIMER2的中断标志

      uint32_t currentCapture = timer_channel_capture_value_register_read(TIMER2,TIMER_CH_3);

      if(firstCapture)
      {
         lastCapture = currentCapture;

         firstCapture = 0;
      }
      else
      {
         capture_diff = (currentCapture - lastCapture) +(overflow_count * 65536);

         test_flag = 1; //置位测量标志

         lastCapture = currentCapture;
      }
      overflow_count = 0;
}

if(timer_interrupt_flag_get(TIMER2,TIMER_INT_FLAG_UP))
{
   timer_interrupt_flag_clear(TIMER2,TIMER_INT_FLAG_UP);
   overflow_count ++;

}
}

void fre_capture_cal(void)
{
if(test_flag)
{
   test_flag = 0;

   frequency = 10000.0f/capture_diff;
   MeasData.freq = (uint32_t)(frequency*10); //频率转换
}

   if(MeasData.Uln < 50) //小于5V
   {
      MeasData.freq = 0;
   }
}

void usart_config(uint32_t band_rate)
{
rcu_periph_clock_enable(RCU_GPIOA);       // 开启引脚端口时钟 PA9 TX  PA10 RX
rcu_periph_clock_enable(RCU_USART0);       // 开启串口时钟

/* 配置GPIO复用功能 */
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9);
gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_10);

/* 配置PA9 TX为复用模式上拉模式 */
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9);
/* 配置TX为推挽输出 50MHZ */
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);

/* 配置PA10 RX为复用模式无上拉下拉模式 */
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10);
/* 配置RX为浮空输入 50MHZ */
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10);

/* 配置DE为输出模式无上拉下拉模式 */
gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_11);                   //485
/* 配置DE为推挽输出 50MHZ */
gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_11);          //485

RS485_DE(0);    //使能接收  485

usart_deinit(USART0);                               // 复位串口

usart_baudrate_set(USART0,band_rate);                // 设置波特率
usart_parity_config(USART0,USART_PM_NONE);          // 没有校验位
usart_word_length_set(USART0,USART_WL_8BIT);       // 8位数据位
usart_stop_bit_set(USART0,USART_STB_2BIT);         // 2位停止位

/* 使能串口 */
usart_receive_config(USART0,USART_RECEIVE_ENABLE); // 使能串口接收

usart_transmit_config(USART0,USART_TRANSMIT_ENABLE);  // 使能串口发送

usart_receiver_timeout_threshold_config(USART0,100);  //设置串口接收超时阈值，这个100是指100bit时间，如果按照10bit传输一个字节，那么就是10个字节时间

usart_receiver_timeout_enable(USART0);             //超时使能

usart_enable(USART0);                               // 使能串口

nvic_irq_enable(USART0_IRQn,0);

usart_interrupt_enable(USART0, USART_INT_RBNE);    // 使能接收中断

usart_interrupt_enable(USART0, USART_INT_RT);       //使能串口接收超时中断
}

void usart_send(uint8_t *buf, uint8_t len)
{
   uint8_t i;

   while(tx_busy);  //等待上一个发送完成

   tx_busy = 1;    //准备发送

   RS485_DE(1);    //发送模式

   usart_interrupt_disable(USART0, USART_INT_RBNE|USART_INT_RT);    // 禁能接收中断(避免发送期间接收自己的数据)

   for(i=0; i<len; i++)
   {
         usart_data_transmit(USART0,buf[i]);    // 发送数据

      delay_ms(10);

      while(RESET == usart_flag_get(USART0,USART_FLAG_TBE));  // 等待发送数据寄存器空标志置位判断是否发送数据发送到移位寄存器，若reset = 0，则表示还没有发送到移位寄存器，那就一直循环；reset=1，则
   }

   while(RESET== usart_flag_get(USART0,USART_FLAG_TC)); //等待发送完成

   RS485_DE(0);  //接收模式

   usart_interrupt_enable(USART0, USART_INT_RBNE|USART_INT_RT);    // 使能接收中断(避免发送期间接收自己的数据)

   tx_busy = 0;
}

void USART0_IRQHandler(void)
{
if(RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE))    //读取数据缓冲区不为空标志
{
g_recv_buff[g_recv_length] = usart_data_receive(USART0);

      g_recv_length++;

      if(g_recv_length >= sizeof(g_recv_buff))
      {
         g_recv_length = 0;
      }
}
   else if(RESET != usart_interrupt_flag_get(USART0,USART_INT_FLAG_RT)) //接收中断超时标志
{
   usart_flag_clear(USART0,USART_FLAG_RT);

      g_recv_complete_flag = 1;
}

}

void UartDriver(void)
{
   uint8_t len;
   uint8_t buf[64] = {0x00};  //接收数据存放的数组

if(g_recv_complete_flag ==1)
{
g_recv_complete_flag = 0;

   process_modbus_request();

      g_recv_length = 0;
}
}

void process_modbus_request(void)
{
uint16_t i = 0;
   uint16_t j = 0;
   uint16_t crc = 0;       //校验码
   uint8_t crch = 0;       //校验码高字节
   uint8_t crcl = 0;       //校验码低字节
   uint16_t addr = 0;    //寄存器地址
   uint16_t cnt = 0;       //数据量
   uint16_t data = 0;    //写入的数据
   uint16_t addrtemp = 0;
   uint16_t index;

   if(g_recv_buff[0] != Para.Addr )
   {return;}

   crc = usMBCRC16(g_recv_buff,g_recv_length-2);       //校验码
crch = (uint8_t)(crc >>8);       //取高8位
crcl = (uint8_t)crc;             //取低位

if((g_recv_buff[g_recv_length-2]!=crch)||(g_recv_buff[g_recv_length-1]!=crcl))  //校验码不对
{
   return ;  //返回空白值
}

addr = ((uint16_t)g_recv_buff[2]<<8)|g_recv_buff[3]; //寄存器地址


switch(g_recv_buff[1])
{
/*03功能码  读单个寄存器*/
case 0x03:
cnt= ((uint16_t)g_recv_buff[4]<<8)|g_recv_buff[5];

if(cnt==0)  //数据量=0
{
Errcmd_addr_data(g_recv_buff,3);  //返回数据错误码 03
return;
}

if((addr >= 0x0A00)&&(addr <= 0x0A04)) //地址范围0x0a00--0x0a06
{
   if((addr+cnt) > 0x0A05)
   {
   Errcmd_addr_data(g_recv_buff,3);       //字节数超范围，报83错误码
   return;
   }
   else
   {
   for(i=0;i<cnt;i++)
   {
   txbuffer[3+i*2] = (uint8_t)(*((uint32_t*)& MeasData.Uln +(addr & 0x00FF)+i)>>8);  //取高8位数据  （uint8_t）强制转换为uint8_t类型的数据；*取后面括号里的数据  （uint32_t*）把Uln的地址强制转化为uint32_t类型指针  &取Uln的地址
   txbuffer[4+i*2] = (uint8_t)(*((uint32_t*)& MeasData.Uln +(addr & 0x00FF)+i));    //取低8位数据
   }
   }
   }
   else if((addr >= 0x0B00)&&(addr <= 0x0B13))    //地址范围0x0b00--0x0b07
   {
if(((addr+cnt) > 0x0B14)||(addr%2 !=0))    //超出地址、地址不等于8的倍数则报错
{
Errcmd_addr_data(g_recv_buff,3);                //字节数超范围，报83错误码
return;
}
else
{
for(i=0;i<cnt;i++)
{
if((addr + i - 0x0b00)%2 ==0)
{
   index = ( addr + i - 0x0b00) /2;          //8为故障记录字节数
   index = (index % 10 )+1;                //10为记录数10条
   if(ErrRecord_Read(index, &Err_ASK) == 1) //读通讯故障记录
   {
Err_ASK.ErrType =0;
Err_ASK.ErrValue =0;
   }
}
txbuffer[3+i*2] = (uint8_t)(*((uint32_t*)& Err_ASK.ErrType +((addr & 0x00FF)+i)%2)>>8);  //取高8位数据
txbuffer[4+i*2] = (uint8_t)(*((uint32_t*)& Err_ASK.ErrType +((addr & 0x00FF)+i)%2));    //取低8位数据
}
}
   }
   else if((addr >= 0x0C00)&&(addr <= 0x0C0B)) //地址范围0x0C00--0x0C0B
   {
if((addr+cnt) > 0x0C0C)
{
Errcmd_addr_data(g_recv_buff,3);          //字节数超范围，则报83错误码
return;
}
else
{
for(i=0;i<cnt;i++)
{
txbuffer[3+i*2] = (uint8_t)(*((uint32_t*)& Para.Mode +(addr & 0x00FF)+i)>>8);  //取高8位数据
txbuffer[4+i*2] = (uint8_t)(*((uint32_t*)& Para.Mode +(addr & 0x00FF)+i));    //取低8位数据
}
}
   }
   else //地址不在范围内，报82错误码
   {
   Errcmd_addr_data(g_recv_buff,2);
   return;
   }

   txbuffer[0] = Para.Addr;  //设备地址
   txbuffer[1] = 0x03;    //功能码
   txbuffer[2] = cnt*2;    //读出的字节数

   crc = usMBCRC16(txbuffer,cnt*2+3); //CRC校验值计算
   crch = (uint8_t)(crc >> 8);
   crcl = (uint8_t)crc;

   txbuffer[3 + cnt * 2] = crch;    //CRC高位数据地址
   txbuffer[4 + cnt * 2] = crcl;    //CRC低位数据地址

   usart_send(txbuffer,cnt*2+5);    //发送
   break;

      default:
Errcmd_addr_data(g_recv_buff,1);  //错误码01
   break;
   }

}

有类似遇到的问题吗？求解，谢谢

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