Luckfox Forums

Hello, I have two questions.

1) My LuckFox Pico Pi AW board suffered a static electricity discharge due to my failure to take necessary precautions. I checked all the pins using the following command sequence, and I saw a value of 3.3V on all of them.

echo PIN$ > /sys/class/gpio/export
echo out > /sys/class/gpio/gpioPIN$/direction
echo 1 > /sys/class/gpio/gpioPIN$/value //should get 3.3V
echo 0 > /sys/class/gpio/gpioPIN$/value //should get 0V
echo PIN$ > /sys/class/gpio/unexport

However, since the pinctrl command is not available in the Linux version, I could not use the pull-up/down features. How else can I check the shealth of the board using an AVO meter?

2) During this test, I noticed that pins 42 and 43 (GPIO1_B2 and GPIO1_B3) remained at the HIGH level and did not change their status. Why don't their statuses change? Is there a technical document summarizing these issues/features of pins/board?

Regards

If you need to test the pull-up/pull-down function, you can refer to the attached file for implementation using the read/write register method. GPIO1_B2 and GPIO1_B3 are the debug serial port pins that have been configured during the SPL stage and will not prompt as being occupied when entering the kernel.