• State Not Answered
  • Locked Locked
  • Replies 0 replies
  • Subscribers 21 subscribers
  • Views 533 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Can't get interrupts working

Mike Keeble

Hi, I have trouble getting interrupts to work.

I am using the AT91SAM96RL64 processor from Atmel with the Keil compiler and uVision 4.

Initially I have successfully configured UART0 to send and receive data using a polling method. I now have modified the code to use interrupts but the interrupt handler is never getting called. I have enabled the UART0 in the PMC and configured the associated AIC registers.

// Enable in PMC
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_US0;
.
// UART config is here....
.
// Set up interrupts
AT91C_BASE_AIC->AIC_IDCR = 1 << AT91C_ID_US0;
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_US0] = 0;
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_US0] = (U32)UART_Isr;
AT91C_BASE_AIC->AIC_IECR = 1 << AT91C_ID_US0;

// Enable receiver and transmitter
AT91C_BASE_US0->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;

// Enable receive interrupt
AT91C_BASE_US0->US_IER = AT91C_US_RXRDY;

Any help would be appreciated.