topic Re: GPIP Pin Address Change in i.MX Processors

GPIP Pin Address Change

Nirjul_Patel — Thu, 03 Feb 2022 06:44:32 GMT

Hello,

I Want To Read/Write Data Direct GPIO Pin A Pind address Through Device Driver And I Want to Change GPIO Pin Address So, Can You Explain Which Driver File I Need Change ? And How to I Change GPIO Pin Address?

Re: GPIP Pin Address Change

jamesbone — Thu, 03 Feb 2022 23:35:04 GMT

Which device are you using? which software your are trying to implement? Linux? SDK?

Re: GPIP Pin Address Change

Nirjul_Patel — Fri, 04 Feb 2022 04:54:48 GMT

Hello,

Thanks For Your Quickly Supoort

I Use i.MX8mm-ddr4-evk board And I Built imx-image-multimedia So,

How to Get Particular GPIO Pin Address?
Which Pin Available Convert to GPIO Pin?
How to Read/Write Data Direct GPIO Pin Address?

Re: GPIP Pin Address Change

Yuri — Fri, 04 Feb 2022 06:55:55 GMT

@Nirjul_Patel
Hello,

I've sent You some comments directly.

Regards,
Yuri.

Re: GPIP Pin Address Change

Nirjul_Patel — Fri, 04 Feb 2022 07:04:09 GMT

@Yuri
Hello

Thanks Your Support
Where Is Your Comments?

Re: GPIP Pin Address Change

Yuri — Fri, 04 Feb 2022 08:32:09 GMT

@Nirjul_Patel
Hello,

check nirjul.patel@radixweb.com

Regards,
Yuri.

Re: GPIP Pin Address Change

Nirjul_Patel — Fri, 04 Feb 2022 10:31:38 GMT

@Yuri
Hello

Thanks Your Support
Please Can you Send Mail This Mail ID:- nirjulpatel1807@gmail.com

Re: GPIP Pin Address Change

Nirjul_Patel — Fri, 04 Feb 2022 10:38:57 GMT

@Yuri
Hello

I Not Get Mail

Re: GPIP Pin Address Change

Yuri — Mon, 07 Feb 2022 04:48:54 GMT

Done!

~Yuri.

Re: GPIP Pin Address Change

Nirjul_Patel — Mon, 07 Feb 2022 06:49:04 GMT

@Yuri

Hello,

Thanks Your Support
I Want To Know Peripheral Device (GPIO ) Memory Address Range
Whare Is Define To .dts File?

Re: GPIP Pin Address Change

Yuri — Mon, 07 Feb 2022 09:49:42 GMT

@Nirjul_Patel
Hello,

i.MX8 device tree files are located in

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale?h=lf-5.10.y

The DTS files include .h files with pins definitions.
Use pinctrl binding documents in Documentation/devicetree/bindings/pinctrl/fsl.
Also: imx8??-pinfunc.h under device tree source folder.

Regards,
Yuri.

Re: GPIP Pin Address Change

josephzhou1 — Thu, 10 Feb 2022 04:45:50 GMT

ok. hi nirjul how r u

2 for imx8 i will told you no have much SPARE GPIO pins for us to use , all of them are reused for others , fews gpio can be exported

root@imx8qxpmek:/sys/class/gpio# ls
export gpiochip128 gpiochip224 gpiochip472 gpiochip96
gpio32 gpiochip160 gpiochip32 gpiochip480 unexport
gpiochip0 gpiochip192 gpiochip464 gpiochip64
root@imx8qxpmek:/sys/class/gpio#

even no have any User LEDs all r system LEDs such as numlock/ caps lock and scrolllock , all under system control , u must undestand this. if u really interest in operate gpio pins , u might try Arduino Uno or TI MSP430 . many gpio there r open for user to control

for imx 8 we normal do LInux , open file , operate file to operate the port , not bare metal

(even in bare metal we all fellow the system defines the address of any port and pins , to let your program more readable and portable lah)

base on this , you can read the proceesor and board reference manual , not short one , but some50mb pdf file and about 9111 pages references manual one(for my board imx8qxpmek , yours also about 6000pages if i m not wrong), to read every things insides and

to find what port u can use lah

see my project << how to port imx8 gpio_LED in linux bsp l5.10.35...>>here the link:

https://community.nxp.com/t5/i-MX-Processors/How-to-port-GPIO-LED-in-Linux-BSP-L5-10-35-for-i-MX8QXP-MEK-Si/td-p/1401420

i also only just find out this pcieb pin not in use , no have wifi moudle for my board si b0 , so can modified the circuits then port to LEDS

============================finally done it==============================

of cause have lah; in line 1406# of file imx8x.dtsi

pinctrl_pcieb: pcieagrp{
fsl,pins = <
IMX8QXP_PCIE_CTRL0_PERST_B_LSIO_GPIO4_IO00 0x06000021 // dun chge this address pls
IMX8QXP_PCIE_CTRL0_CLKREQ_B_LSIO_GPIO4_IO01 0x06000021
IMX8QXP_PCIE_CTRL0_WAKE_B_LSIO_GPIO4_IO02 0x04000021
>;
};

thank you as you helps r great !!! i accepted it as a solution , thank you again

Best Regards,
Joseph Zhou Jianhui / Senior Embedded Software Engineer

============================================================

u no need to channged the default port / pin address and dun do so , it is always the same address say

IMX8QXP_PCIE_CTRL0_PERST_B_LSIO_GPIO4_IO00 0x06000021 // dun chge this address pls

thank you , hope you can find out the correct way and enjoy developing .

GPIP Pin Address Change

josephzhou1 — Sat, 09 Apr 2022 03:32:06 GMT

ok. hi nirjul how r u

2 for imx8 i will told you no have much SPARE GPIO pins for us to use , all of them are reused for others , u must undestand this

for imx 8 we normal do LInux , open file , operate file to operate the port , not bare metal

base on this , you can read the board reference manual , not short one , but some 9111 pages references manual one

to find what port u can use lah

see my project << how to port imx8 gpio in linux bsp l5.10.35...>>

i find our this pcieb not in use , no have wifi moudle for my board si b0 , so can modified the circuits then port to LEDS

==========================================================

of cause have lah; in line 1406# of file imx8x.dtsi

pinctrl_pcieb: pcieagrp{
fsl,pins = <
IMX8QXP_PCIE_CTRL0_PERST_B_LSIO_GPIO4_IO00 0x06000021
IMX8QXP_PCIE_CTRL0_CLKREQ_B_LSIO_GPIO4_IO01 0x06000021
IMX8QXP_PCIE_CTRL0_WAKE_B_LSIO_GPIO4_IO02 0x04000021
>;
};

thank you as you helps r great !!! i accepted it as a solution , thank you again

Best Regards,
Joseph Zhou Jianhui / Senior Embedded Software Engineer

============================================================

6 thank you , hope you can find out the correct way and enjoy developing .

joseph