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

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.

Shine：

我把您的问题升级到英文e2e论坛了，请关注下面帖子的回复。

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1136993/dra821u-the-software-callback-function-cannot-be-triggered-by-the-falling-edge-interrupt-trigger-on-the-dra821-wkup_gpio0_47-pin

,

Shine：

请下面工程师的回复。

Please refer to the FAQ https://e2e.ti.com/support/processors-group/pocessors/f/processors-forum/1126741/faq-tda4vm-using-pdk-gpio-driver for details. Let me know if you have any further queries. You can also refer to the GPIO LED blink example at <PDK>\packages\ti\drv\gpio\test\led_blink\src