VIM3L GPIO access

VIM3
1

Hello,
This could be repeating post but I have to ask, I need at least 7 accessible GPIO pins on VIM3L. So far I have access to 5 GPIOs according to pin stated below. Pins with bank number is accessible so far.

1 5V
2 5V
3 USB_DM
4 USB_DP
5 GND
6 MCU_3V3
7 MCU_NRST
8 MCU_SWIM
9 GND
10 ADC_CH0
11 VDDIO_AO18
12 ADC_CH3
13 GPIOAO_10
14 GND
15 GPIOH_6 (433)
16 GPIOH_7 (434)
17 GND
18 Linux_RX
19 Linux_TX
20 3V3
21 GND
22 TP SCL
23 TP SDA
24 GND
25 GPIOAO_2
26 GPIOAO_3
27 3V3
28 GND
29 GPIOA_1
30 GPIOA_0 (460)
31 GPIOA_3
32 GPIOA_2
33 GPIOA_4
34 GND
35 GPIOX_7 (432)
36 RTC_CLK
37 GPIOH_4 (431)
38 MCU_PA1
39 GPIOZ_15
40 GND

I know by disabling I2S function we can access pin from 29 to 33 (please correct me if I am wrong) but I need this function.

I tried GPIOZ_15 > pin No. 426 (if I’m not wrong) - I can export- can turn on through Terminal but physically checking through multi-meter its not working.

Can someone help me access at-least 2-3 more GPIOs, moreover please confirm weather this pin numbers are correct or not, It seems different then VIM3 GPIOs. (*I am using VIM3L)

Thank You.

2

GPIOZ_15 is OD PIN, you need external PULL UP/DOWN.

You can try to remove uart3 pwm_f i2c3 in overlays to get more GPIOs.

3

Hey, thank you for your replay,

what about this pins:
13 GPIOAO_10
25 GPIOAO_2
26 GPIOAO_3

Disabling I2C function on Pin 25,26 would cause rebooting problem and its also not recommended by your team, rest pin 22,23 - I2C_M3 → how can we disable it, and what is the GPIO number of this pins?

And can we access GPIOAO_10 !!

And I am already using pin35 → pwm_f → 432 as GPIO , so thats no a problem.

4

No, you can not disable PIN25 & PIN26.

Remove i2c3 in overlays will release PIN22 & PIN23

You can try this command to release PIN13

$ amixer cset name='Audio spdif mute' on
5

Can you please indicate where should I enter that command to be able to release pin13 ?