TM4C1290NCPDT: UART Interrupts not working.

Doug Broadwell85

Part Number: TM4C1290NCPDT

    UARTConfigSetExpClk(UART0_BASE, GetClkSpeed(), 9600,
             ( UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE ));
    UARTIntRegister(UART0_BASE, Debug_Uart_Interrupt);                          // Register Interrupt Handler.
    UARTEnable(UART0_BASE);
    UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_TX | UART_INT_OE | UART_INT_FE );

But Debut_Uart_Interrupt() never gets called. Polling characters works just fine.

Thanks, Doug

over 1 year ago

0 Charles Tsai over 1 year ago

TI__Guru**** 191906 points

Hi Doug,

I don't see you enable the UART0 interrupt at the NVIC level.

IntEnable(INT_UART0);

0 Doug Broadwell85 over 1 year ago in reply to Charles Tsai

Intellectual 550 points

Hi Charles,

The UARTIntRegister() function calls IntRegister().

I forgot to mention that there is an IntMasterEnable() call after the snippet.

Doug

0 Charles Tsai over 1 year ago in reply to Doug Broadwell85

TI__Guru**** 191906 points

Hi Doug,

UARTIntRegister is only to register a ISR vector dynamically. InMasterEnsble is to enable the interrupt for the processor at the global level. You still need to enable each individual peripherals for interrupt at the NVIC level. Can you take a look at the uart_echo example in TivaWare. I'm currently on vacation without my PC. I can't paste the code.

0 Doug Broadwell85 over 1 year ago in reply to Charles Tsai

Intellectual 550 points

Hi Charles,

I fired up my second prototype and even though the MPU runs, neither the SysTick nor UART interrupts work on it ! So I'm of the mind that there must be something with my hardware that is causing it to not run correctly. So I'm going to close this out for now and see if I can figure it out.

Thanks for your help!

Doug

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TM4C1290NCPDT: UART Interrupts not working.