GPIO on variscite costume board (omap4460)

Mohamed Lotfi MOUKNECHE

Hi,

i try to integrate NFC module on my board which is variscite costume board with omap4460, the software integration is did but i have a problem with th GPIO.

the NFC module need two GPIOs : wakeup and enable,

can you please tell me how can i define my GPIO on the Board_var_som_om4460.c and how can i know if the GPIO is used or no by another device.

Best Regards.

over 13 years ago

0 Gina Glaser over 13 years ago

TI__Expert 8055 points

Mohamed,

I am not familiar with board_var_som_om4460.c, but I am assuming this is the x-loader pin muxing configuration file, such as we have for Blaze: http://git.omapzoom.org/?p=repo/x-loader.git;a=blob;f=board/omap4430sdp/omap4430sdp.c;h=7f350f322502d469c7c372aa47d751d1e34303c8;hb=omap4_dev

You will need to determine which pins on OMAP you want to use for the GPIOs. You can also review the OMAP datasheet for more details: http://www.ti.com/general/docs/wtbu/wtbudocumentcenter.tsp?templateId=6123&navigationId=12037#65

In order to configure a pin as a GPIO, you would change the line in the x-loader pin muxing configuration file, corresponding to this particular pin, to have mux mode 3 (M3) for a GPIO. You will also need to set it as an input (IEN), output (IDIS), pull up (PTU), or pull down (PTD) appropriately.

If you change any of the pin muxing on the board, make sure to check the kernel as well, as some of the pin muxing is reconfigured there, mainly in the board file (/arch/arm/mach-omap2/board-4430sdp.c for Blaze; you will need to check the corresponding file for the Variscite module).

Regards,
Gina

0 Magdalena Iovescu over 13 years ago in reply to Gina Glaser

TI__Intellectual 2505 points

Mohamed,

Also, for Variscite board support, please contact them directly; see http://www.variscite.com/.

Regards,

Magdalena

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GPIO on variscite costume board (omap4460)