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Tool/software:
Hello TI expert,
When I play with LP_MSPM0G3507 launch pad on uart_callback_freertos_ticlang example. I encounter a problem and don't understand.
Why uart interrupt always get triggered? indeed TX and RX line are clean.
CCS Version: 12.7.1.00001
MSPM0 sdk version: mspm0_sdk_2_01_00_03
example: C:\ti\mspm0_sdk_2_01_00_03\examples\rtos\LP_MSPM0G3507\drivers\uart_echo
the code could be executed and echo function works well as below.
However, when I put a breakpoint at UART0_IRQHandler(void) function, it always get triggered. as shown below
seems like DMA related flag always being set.
then I put a breakpoint at xPortSysTickHandler(void). it never get triggered. seems like system tick preempted by UART interrupt.
How could explain this?
Hi Hellic,
Thanks for your attention.
1 now, your M0's IIDX = 17, it's a DMA DONE on RX event.
--> Did you mean, IIDX = 10h, not 17
2 And I followed your suggestion. add the code below UARTMSP_interruptHandler . ( did slight modification).
However it can't even show the Echoing... string, just print E.
Hi Helic,
1 these code are provided by UART driver library, does it mean UART interrupt handler doesn't handle DMA related interrupt event properly.
2 I also tried UART_NO_DMA macro and modified UARTObject[] in ti_drivers_config.c. However, it doesn't help.
3 can you help me try on your side. is it my own problem or is a common problem.
4 since you guys are more familiar with driver library code, if it needs some modification, its better make change on your side.
