STM32和openmv串口通訊運(yùn)行速度變慢

ID:644357 · 發(fā)表于 2021-2-17 09:27

1.使用了仿真器下載程序
2.可以正常收發(fā)數(shù)據(jù)
3.在拔掉openmv串口后，程序起飛，正常運(yùn)行
4插上串口后，一行代碼大概跑0.5秒，屏幕刷新很慢

視頻中黑屏是放下手機(jī)在插線，各位大佬移步觀看視頻(GIF)。

ID:332130 · 發(fā)表于 2021-2-17 09:27

沒(méi)有清除串口接收中斷標(biāo)志。
void DEBUG_USART_IRQHandler(void)
{
      if(USART_GetITStatus(DEBUG_USARTx,USART_IT_RXNE)!=RESET)
      {
            temp_head[0] = USART_ReceiveData(DEBUG_USARTx);

      }
      USART_ClearITPendingBit(DEBUG_USARTx, USART_IT_RXNE);
      USART_ClearFlag(DEBUG_USARTx, USART_FLAG_RXNE);
}

ID:644357 · 發(fā)表于 2021-2-17 09:34

這是串口中斷

void DEBUG_USART_IRQHandler(void)
{
if(USART_GetITStatus(DEBUG_USARTx,USART_IT_RXNE)!=RESET)
{
temp_head[0] = USART_ReceiveData(DEBUG_USARTx);
}
}

復(fù)制代碼

這是顯示數(shù)據(jù)的代碼

while(1)
{
Gui_DrawFont_GBK16(5,5,BLUE,BLACK,"任務(wù)顯示:");
Gui_DrawFont_GBK16(5,55,BLUE,BLACK,"進(jìn)程:");
Gui_DrawFont_Num32(0 ,20,GREEN,BLACK,Num[2]);
Gui_DrawFont_Num32(0 ,20,BLACK,BLACK,Num[2]);
Gui_DrawFont_Num32(0 ,20,GREEN,BLACK,Num[3]);
Gui_DrawFont_Num32(0 ,20,BLACK,BLACK,Num[3]);
Gui_DrawFont_Num32(0 ,20,GREEN,BLACK,Num[4]);
Gui_DrawFont_Num32(0 ,20,BLACK,BLACK,Num[4]);
Gui_DrawFont_Num32(25,20,GREEN,BLACK,Num[2]);
Gui_DrawFont_Num32(50,20,GREEN,BLACK,Num[3]);
Gui_DrawFont_GBK16(82,30,RED,BLACK,"+");
Gui_DrawFont_Num32(90,20,GREEN,BLACK,Num[1]);
Gui_DrawFont_Num32(115,20,GREEN,BLACK,Num[2]);
Gui_DrawFont_Num32(140,20,GREEN,BLACK,Num[3]);
USART_SendData(DEBUG_USARTx,0xA2);
sprintf((char*)cx_buf,"cx:%08X",temp_head[2]);
Gui_DrawFont_GBK16(5,80,RED,BLACK,cx_buf);

復(fù)制代碼

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STM32和openmv串口通訊運(yùn)行速度變慢

最佳答案

瀏覽過(guò)的版塊