topic IMX6-GPIO CONFIGURATION in i.MX Processors

IMX6-GPIO CONFIGURATION

geekdarcy — Mon, 30 Jul 2018 07:58:19 GMT

Hi everyone,

I'm developing a new board based on the IMX6q.

My configuration pins are as follows:

MX6Q_PAD_GPIO_3__GPIO_1_3,

MX6Q_PAD_GPIO_6__GPIO_1_6,

I can successfully request gpio3 and gpio6 for gpio output.

I can control gpio3 . But I can't control gpio6.And the ouput of gpio6 always is high.

When I measure the voltage of pin gpio6 is always 3.2V.

The software and hareware configuration of pin gpio3 and gpios is the same. Both they have a 4.7k pull-up resistor.

I have double checked my configuration.I am very confused.

Does anyone know what I am doing wrong? Any clue about that error?

Kind regards

Re: IMX6-GPIO CONFIGURATION

art — Tue, 31 Jul 2018 10:28:10 GMT

Please refer to the IOMUXC_SW_MUX_CTL_PAD_GPIO06 register field descriptions table on the Page 2068 of the i.MX6Dual/Quad Reference Manual Rev.5 document, available on the processor's Documentation web page:

https://www.nxp.com/products/processors-and-microcontrollers/applications-processors/i.mx-applications-processors/i.mx-6-processors/i.mx-6quad-processors-high-performance-3d-graphics-hd-video-arm-cortex-a9-core:i.MX6Q?tab=Documentation_Tab

The Table says that the pad is involved in a number of daisy chains. So, please check the configuration of all related IOMUXC registers, mentioned in the Table.

Have a great day,
Artur

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Re: IMX6-GPIO CONFIGURATION

geekdarcy — Tue, 31 Jul 2018 11:52:44 GMT

hi Artur,

Thanks for reply!

Why need I concern daisy chains mode？The mode of mux I config is ALT5.

#dedine MX6Q_PAD_GPIO_6_GPIO_1_6

IOMUX_PAD(0x0600, 0x0230, 5, 0x0000,0,0)

In my opinion, when mux mode is ALT0 , ALT2 or ALT5,I should check daisy chains.

Please show me more details.

 Any clue about that error?

Kind regards!

Re: IMX6-GPIO CONFIGURATION

geekdarcy — Tue, 31 Jul 2018 11:57:51 GMT

Re: IMX6-GPIO CONFIGURATION

art — Fri, 03 Aug 2018 07:43:07 GMT

The wrong configuration of other pads, involved in daisy chain, can affect the GPIO06 pad operation as well. So, anyway, please check the configuration of other pads, involved in this daisy chain.