Hi community, I'm searching a USART example , STM32F407VET
First, I create code by using STM32CubeMX.
I has try it but it is too hard to use that.
I felt 'HAL UART' example of length of the array that receive and send , has limited. (or need more buffer size)
It has a some remain data in USART buffer TX or RX.
when I send data to microcontroller(PC -> MCU) Repeatedly,
Sometimes the UART doesn't work.
It look like a buffer overload or TX/RX buffer has some remain data
I want to find a best way to use uart(or USART),
to use efficiently.
under code is my code that use 'HAL UART '
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
//bufferData : char bufferData[128]
//Example of Data Format
//#,100,200,300,!,$,100,200,300,%
if (huart->Instance == USART1) {
int bufferCount = 0;
int isStartFlagOn = 0;
HAL_StatusTypeDef RESULT = HAL_OK;
if(receiveddata == '#'){//wait startflag
bufferData[bufferCount++] = '#';
isStartFlagOn = 1;
}
if(isStartFlagOn == 1){
for (;;)//if get startflag, start loop
{
HAL_UART_Receive(&huart1, &receiveddata, 1, 100);//receive data during end
if (receiveddata == '%') { //if end data received,
bufferData[bufferCount++] = (char) receiveddata;//fill buffer format
HAL_UART_Transmit(&huart1, bufferData, bufferCount, 10);//and Transmit PC
memset(bufferData, 0, bufferCount);//buffer clear
break;
} else {
bufferData[bufferCount] = (char) receiveddata;//if data is not end, fill data
bufferCount++;//count up buffer
}
}
}
else{
memset(bufferData, 0, bufferCount);//startsignal is not 1 clear buffer,
isStartFlagOn=0;//start signal off
}
RESULT = HAL_UART_Receive_IT(&huart1, &receiveddata, 1);
}
}
is any other problem my code?
and there are best examples?
Thanks you
