Does GPIO configuration by AT command need power reset?

1

Hi,

I tried the following command and an error message was shown.

“AT+WIOCFG=30,16” (AT command)
“echo 30 > /sys/class/gpio/export”
“sh: write error: Operation not permitted”

In AT Command Reference(page.261), “Reset required to apply changes: No” is written.

Is it true?

2

I remember if you set it to GPIO output, accessible via AT commands ( = 4), after you can control it to be high or low without reset.
But your case seems need to reset module.

3

Hi, jyijyi.

Thank you for answering.
If possible, could you tell me why my case needs to reset module?

4

Hi, jyijyi

Sorry for interrupt.
According to “4118047 WPx5xx-76xx-77xx AT Command Reference_r7.1.pdf”, it is described that +WIOCFG is defined as “Reset required to apply changes: No”.
It is different from the test result and AT command description.

Could you tell us the specification which is correct in the HW point of view?

5

I guess this is because you are changing the core owner from modem core to APP core when you change value from 4 to 16.

6

As said before, it depends on whether you are using modem core as parameter.

7

Thank you for your opinion.
“Reset required to apply changes: No” is incorrect in some cases, isn’t it?

8

kind of grey area, it depends on whether you are setting it as GPIO.