Kinetis Design Studioのトピックtrap inside an undefined IRQ handler

trap inside an undefined IRQ handler

Ming — Tue, 13 Oct 2015 16:08:48 GMT

I am having an issue relating to LPUART interrupt handler. I use PE to initialize LPUART1 and enable the interrupt. From my app code, I invoke API call LPUART_DRV_SendData() to tx a single byte of data. But instead of branching to LPUART1_IRQHandler(), the code jumps to UART2_FLEXIO_IRQHandler(). Since UART2 is undefined, the code is now trapped inside infinite loop. Any ideals what went wrong? My target MCU is MKL17Z128.

UART2_FLEXIO_IRQHandler:

000004f8: ldr r0, [pc, #0] ; (0x4fc)

142 bx r0

000004fa: bx r0

141 ldr

Re: trap inside an undefined IRQ handler

Alice_Yang — Thu, 15 Oct 2015 02:59:40 GMT

Hello Ming,

Please show your code clearly , especially the initialization of LPUART1 and enable the interrupt .

And does you project create by KSDK ? which version ?

Alice

Re: trap inside an undefined IRQ handler

Ming — Tue, 20 Oct 2015 13:36:59 GMT

I found out the issue myself. I had lpuart1 de-initialized by accident. So it was an un-handled exception when I attempted to start a Tx.