MMC1 Issue

Daniel Ulrich

We are using MMC0 to boot from the SD card and do not have Flash on MMC1. We are trying to use the MMC1 port pins (board already made) to drive some LEDs; however, it seems the MMC1 peripheral is messing with our ability to control the LEDs. How can we disable the MMC1 peripheral??

over 10 years ago

0 Daniel Ulrich over 10 years ago

Intellectual 605 points

0 Biser Gatchev-XID over 10 years ago in reply to Daniel Ulrich

TI__Guru**** 393215 points

I have moved this to the Sitara forum. The SW team is looking at it now.

0 Kemal R. Shakir over 10 years ago in reply to Biser Gatchev-XID

TI__Guru 55345 points

Hello Daniel,

You can disable the MMC1 peripheral by changing the pin multiplexing mode.
These modes are defined in:
#U-boot:
<sdk-install-dir>/ti-sdk-am335x-evm-08.00.00.00/board-support/u-boot-2014.07-g7e537bf/board/ti/am335x/mux.c
#Kernel
<sdk-install-dir>ti-sdk-am335x-evm-08.00.00.00/board-support/linux-3.14.26-g2489c02/arch/arm/boot/dts/<your-board-name>.dts/.dtsi
Note that mmc2 corresponds for MMC1

Best regards,
Kemal

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MMC1 Issue