TDA4VM-Q1: How to get gpio status on TDA4 uboot?

Hi,

Can you read out the value of PADCONFIG register: 0x00011C0D0

U-Boot numbering is slightly different.

You can check the status of all the GPIOs from U-Boot command prompt using:

gpio status -a

- Keerthy

Hello，Keerthy

This is the result of running in uboot，It seems that my configuration does not take effect，

How to get the status of gpio in code？

Hi,

Can you refer the file in U-boot folder: "board/ti/j721e/evm.c"

detect_enable_hyperflash function.

Best Regards,
Keerthy

Hello，Keerthy

This is my code, but still no success..

Or is there any other way in uboot?

Hi Wang,

The first thing we need to ensure is that: 

Can you read out the value of PADCONFIG register: 0x00011C0D0

What is the value?

- Keerthy

Hello Keerthy,

I want to modify one gpio value in uboot. GPIO0_127. Belongs to main domain.

Using TDA4VM Eval board.

What pin number I should use to modify this gpio.

If I give gpio set/clear 211 its throwing warning as "Warning: value of pin is still 0"

Please help me with this.

Thank you,

Best Regards,

Lakshmi shetty

Hi Lakshmi Shetty,

GPIO0_127 comes out on the pad AC4.

md 0x11c200 0x1

This should give the pinmux setting for GPIO0_127. Make sure that it is set to GPIO0_127 mode. Value should be 0x08050007.
If not then it will not toggle the physical pin.

- Keerthy

Hello Keerthy,

When I am reading this ram address, getting the vale as 0x08214007.

How can I proceed?

Thanks in advance,

Lakshmi Shetty

Hello Keerthy,

I tried to write this register value in uboot command prompt(using mw 0x11C200 0x08050007).

Able to change to gpio value using set/clear in uboot command prompt.

If I need to do this in uboot code, is there any reference?

Thanks in advance,

Lakshmi Shetty