topic Re: i.MX6Q - GPIO Output and Blinking LED in i.MX Processors

i.MX6Q - GPIO Output and Blinking LED

yoshitakatakebe — Wed, 13 Jul 2016 04:48:16 GMT

Hi.

I'm working on MCIMX6-SDB (SABRE-SD).

SABRE-SD will be used to notify signal to another CPU Board by setting "GPIO_2" high/low.

In DESIGN_FILE (SPF-27392_C5.pdf), GPIO_2 is connected to "KEY_ROW6" signal and that connect to "USR_DEF_RED_LED". That makes D3 LED up/down.

So, I think that if GPIO_2 is set to high or low, D3 LED blinks. Is it right?

If it is right, I have next question.

To blink D3 LED, GPIO1 bit2 is written 1 and 0, but D3 LED does not blink.

Registers were initialized as below, please tell me if there are some lack or trouble.

(1) Write 0x00000015 to IOMUXC_SW_MUX_CTL_PAD_GPIO02 (0x020E_0234).

(2) Write 0x0001b0b0 to IOMUXC_SW_PAD_CTL_PAD_GPIO02 (0x020E_0604)

(3) Write 0x00000004 to GPIO1_GDIR (0x0209_C004)

(iterate below)

(4) Write 0x00000004 to GPIO1_DR (0x0209_C000)

(5) Write 0x00000000 to GPIO1_DR (0x0209_C000)

igorpadykov — Wed, 13 Jul 2016 11:52:35 GMT

Hi Yoshitaka

pelase refer to attached example for

toggling LED (D3, GPIO1_2) on i.MX6 SD-SDP board.

Best regards

igor

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yoshitakatakebe — Thu, 14 Jul 2016 02:38:06 GMT

Hi Mr.igorpadykov.

It worked.

Thank you for your help.

Best regards

Yoshitaka