Posted on July 11, 2015 at 07:41 Hello,
I have a very simple issue but ununderstandable for me. Hopping someone could explain me what's happening.
I have made the code simple in order to point out the issue:
#include ''main.h''
int main(void)
{
HARD_Mcu_Init();
GSM_config();
while (1)
{
GSM_State_Machine();
}
}
In GSM.c:
#include ''stm32f0xx_hal_uart.h''
#include ''GSM.h''
void GSM_State_Machine(){
GSM_Fixed_Baude (Term_huart, ATData, GSM_BAUD, GSM_BUFFERSIZE, &Conf1, aGSM_BAUD_RXBuffer, GSM_BAUD_RX_BUFFERSIZE);
}
int GSM_Fixed_Baude(UART_HandleTypeDef GSM_UART, char * const pbyDst, uint8_t* aTxBuffer, int iMaxSize, M66_ConfData * psConfData,uint8_t* aRxBuffer, int iMaxSizeRx){ if(HAL_UART_Receive(&GSM_UART,(uint8_t*) aRxBuffer, iMaxSizeRx, 1000) != HAL_OK)
{
return 0;
}
else
{
return 1;
}
}
So I intentionally don't write anything on UART so in debug I can see that HAL_UART_Receive returns HAL_TIMEOUT.
Now, If I check for HAL_OK I get the opposite than checking for HAL_TIMEOUT without changing anything else.
if(HAL_UART_Receive(&M66_UART,(uint8_t*) aRxBuffer, iMaxSizeRx, 1000) == HAL_OK)
-> return 0;
if(HAL_UART_Receive(&M66_UART,(uint8_t*) aRxBuffer, iMaxSizeRx, 1000) ==HAL_TIMEOUT)
-> return 0;
if(HAL_UART_Receive(&M66_UART,(uint8_t*) aRxBuffer, iMaxSizeRx, 1000) !=HAL_OK)
-> return 1;
if(HAL_UART_Receive(&M66_UART,(uint8_t*) aRxBuffer, iMaxSizeRx, 1000) !=HAL_TIMEOUT) ??
-> return 1;
I have got other behaviour like both else and if executed , I have checked in debug mode as well but it's not doing this anymore and I can't tell what I have changed... Does that could come from IAR or bad #include or? It is a big mystery I am very curious to understand why it is doing this.
Thank you ;
#hal #enum #ifelse
