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Receiver interrupt enabled

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Serial smartcard reader sends data which should be processed.
In the USART1 IRQ a status variable is set to show that data has
arrived, which should be checked for in the main function.
This commit is contained in:
Christina Quast
2015-01-29 18:05:32 +01:00
parent c8bf9f112a
commit b70efc0766
1 changed files with 18 additions and 15 deletions
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33
sam3s_example/mains/phone_test.c
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@@ -113,9 +113,7 @@ static char rcvdChar = 0;
void USART1_IrqHandler( void ) void USART1_IrqHandler( void )
{ {
uint32_t stat; uint32_t stat;
// printf(":>");
char_stat = 0; char_stat = 0;
return;
// Rcv buf full // Rcv buf full
/* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) { /* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) {
TRACE_DEBUG("Rcv buf full"); TRACE_DEBUG("Rcv buf full");
@@ -124,19 +122,22 @@ void USART1_IrqHandler( void )
*/ */
uint32_t csr = USART_PHONE->US_CSR; uint32_t csr = USART_PHONE->US_CSR;
// printf(".\n\r");
if (csr & US_CSR_TXRDY) { if (csr & US_CSR_TXRDY) {
/* transmit buffer empty, nothing to transmit */ /* transmit buffer empty, nothing to transmit */
} }
if (csr & US_CSR_RXRDY) {
stat = (csr&(US_CSR_OVRE|US_CSR_FRAME|
US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK|
(1<<10)));
stat = (csr&(US_CSR_OVRE|US_CSR_FRAME| if (stat == 0 ) {
US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK| /* Get a char */
(1<<10))); rcvdChar = ((USART_PHONE->US_RHR) & 0xFF);
} /* else: error occured */
if (stat == 0 ) { char_stat = stat;
/* Get a char */ }
rcvdChar = ((USART_PHONE->US_RHR) & 0xFF);
} /* else: error occured */
char_stat = stat;
} }
static void ISR_PhoneRST( const Pin *pPin) static void ISR_PhoneRST( const Pin *pPin)
@@ -283,14 +284,15 @@ void _ISO7816_Init( const Pin pPinIso7816RstMC )
/* Configure USART */ /* Configure USART */
PMC_EnablePeripheral(ID_USART_PHONE); PMC_EnablePeripheral(ID_USART_PHONE);
// USART_EnableIt( USART1, US_IER_RXRDY|US_IER_TXRDY) ; USART1->US_IDR = 0xffffffff;
USART_EnableIt( USART1, US_IER_RXRDY) ;
/* enable USART1 interrupt */ /* enable USART1 interrupt */
//NVIC_EnableIRQ( USART1_IRQn ) ; NVIC_EnableIRQ( USART1_IRQn ) ;
// USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER; // USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER;
USART_SetTransmitterEnabled(USART_PHONE, 1); USART_SetTransmitterEnabled(USART_PHONE, 1);
//USART_SetReceiverEnabled(USART_PHONE, 1); USART_SetReceiverEnabled(USART_PHONE, 1);
} }
@@ -377,7 +379,8 @@ extern int main( void )
// printf("Nothing to do\n\r"); // printf("Nothing to do\n\r");
} }
if (rcvdChar != 0) { if (rcvdChar != 0) {
printf("Received _%x_ ", rcvdChar); printf("Received _%x_ \n\r", rcvdChar);
rcvdChar = 0;
} }
} }
return 0 ; return 0 ;