startup.ccs interrupt routines on tm4c123 tiva launchpad

Burhan Wani

If I want to enable interrupts for a UART, say UART1 for both transmission and reception, how do I include both the transmission and reception ISR's in the startup.ccs file since it shows a single place to put both the ISR's

over 9 years ago

0 James Lockridge19 over 9 years ago

TI__Genius 14485 points

I'm moving this to the Microcontrollers forum.

0 Amit Ashara over 9 years ago

TI__Guru**** 244380 points

Hello Burhan,

The ISR will be a single function for both UART TX and RX. In the Interrupt Service Routine you would need to read the Masked Status to see which of the two has caused the interrupt to be asserted and then process the same accordingly. As an example

void UART1InterruptHandler(void)

{

uint32_t ui32MaskedInterruptStatus = UARTIntStatus(UART0_BASE, true)

if(ui32MaskedInterruptStatus & UART_INT_TX)

{

}

if(ui32MaskedInterruptStatus & UART_INT_RX)

{

}

Regards

Amit

0 Burhan Wani over 9 years ago in reply to Amit Ashara

Prodigy 50 points

wow.. that solves the problem. thank you so much for the timely reply. much appreciated

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startup.ccs interrupt routines on tm4c123 tiva launchpad