SPI2 interface to microSD in RM48 HDK

Yanfang Zhang

Could you pls provide the configuration for all SPI2 registers? if PINMUX register should be configurated? In my project, only CMD0 is responsed with 0x01, then all response are all 0xFF.

I also noticed Spi->SPIBUF->LCSNR is 0x02 after reception, it should be the copy of CSNR, but in fact CSNR is 0xFE, CS0 is used. i am puzzled.

over 11 years ago

0 Zhaohong Zhang over 11 years ago

TI__Mastermind 22715 points

Yanfang,

I saw that you are already are this thread about SPI/SD card interface.

http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/335276.aspx

For the SPI module, only CS[1] is muxed. I do not think that you are using this pin. I also would suggest you directly checking the SPIBUF register to see what you receive.

Thanks and regards,

Zhaohong

0 Yanfang Zhang over 11 years ago in reply to Zhaohong Zhang

Prodigy 50 points

thank you~but i don't think the former thread could help me too much.

i think, SPI2 only has 2 CS pins, CS[0] and CS[1], CSNR 0xFE infact is 0x02 in

hardware, so Spi->SPIBUF->LCSNR is 0x02 .

0 Zhaohong Zhang over 11 years ago in reply to Yanfang Zhang

TI__Mastermind 22715 points

Please check the SPIPC0 register to see what pins are configured as SPI function. The pin directions in SPIPC1 register are only for GIO mode and have nothing to do with SPI operation.

Thanks and regards,

Zhaohong

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SPI2 interface to microSD in RM48 HDK