Posted on July 17, 2017 at 16:04I am using a custom pcb with an onboard STM32 and CC2540 physically connected together over USART3. I have programmed the CC2540 to relay a single byte of data over USART3 and programmed the STM32 to receive this data in USART3_IRQ. Here is the relevant code from each device:
1) CC2540 (BLE_Bridge):
static void simpleProfileChangeCB( uint8 paramID )
{
uint8 data[20];
uint8 len;
switch( paramID )
{
case HORIZON_VALUE:
SimpleProfile_GetParameter( HORIZON_VALUE, &data );
len = data[0];
//keep trying to send data until it is a success. this may not be the desirable approach
while (sendDataToHost(&data[1], len));
break;
default:
// do nothing
break;
}
}
2) STM32:
void USART3_IRQHandler(void)
{
RXNE_flag = USART_GetFlagStatus(USART3, USART_IT_RXNE);
RXNE_IT_status = USART_GetITStatus(USART3, USART_IT_RXNE);
if(RXNE_IT_status != RESET){
horizon_val = (s16) USART_ReceiveData(USART3);
}
}
As I said, I can successfully send data to the STM32 through a serial terminal so USART3_IRQ should be triggered when the CC2540 transmits the data.
I have configured USART3 on the CC2540 to use DMA, do I have to use DMA on the STM32 as well?
Tony
