DRA821U: The software callback function cannot be triggered by the falling edge interrupt trigger on the DRA821 WKUP_GPIO0_47 pin

Hello Champs,

To use the DRA821 WKUP_GPIO0_47 pin as a falling edge interrupt trigger, the interrupt needs to be processed on the MCU_R5FSS0 core.

According to TRM and recent explorations:

1. Set WKUP_GPIO0_47 as falling edge interrupt detection and enable BANK interrupt;

2. Enable WKUP_GPIOMUX_INTRTR0_MUXCNTL_n.INT_ENABLE at the same time, and WKUP_GPIOMUX_INTRTR0_MUXCNTL_n.ENABLE=47; and try 105

3. The interrupt number in Cfg is 126, and 125 is tried;

After the above settings, the software interrupt function cannot be triggered to handle the interrupt.

The following is the test screenshot: The test shows that the falling edge of 1.519us is given to the hardware, and the interrupt is recognized, but the software interrupt cannot be triggered.




Thanks
Rgds
Shine