Processor Expert config for SD Card - MC9S08AW32

[marcov]

Hi guys,
I'm using the SPI bus on the MC9S08AW32 to access to an SD card.

In CodeWarrior I've added through Processor Expert the SPI bus setup in hardware mode. Using the default configuration for master I have some trouble  interfacing with the card.

So can u please tell me if this configuration is right?

regards,
marco











Message Edited by NLFSJ on 2008-05-08 06:21 AM

[erooll]

Hi. marcov, actually I use a SD card like a storage device, even I have implement a FAT file system to store data.
Usually I set all modules of microcontroller writing directly code.
This is my settings that I have used in a GT60, an recently in a QE128

   SPI1BR = 0x00;       //Baud Rate @ fbus/2   

   SPI1C2 = 0x00;
  
   SPI1C1 = 0b01011100;
    /*        ||||||||-->LSBFE: LSB first
              |||||||--->SSOE: Slave select output enable
              ||||||---->CPHA: Clock Phase
              |||||----->CPOL: Clock Polarity
              ||||------>MSTR: Master/Slave Mode Select
              |||------->SPTIE: SPI Transmit Interrupt Enable
              ||-------->SPE: SPI Sytem Enable
              |--------->SPIE: SPI Interrupt Enable (for SPRF and MODF)
    */           

[Roach]

I can see that your shift clock idle polarity is High, I think it has to be low to communicate with SD card. Attached is my PE config.

Message Edited by Roach on 2008-05-15 07:18 PM

SD_SPI2.jpg

Message Edited by t.dowe on 2009-10-27 12:36 PM

[marcov]

thanks! i will give it a try....

my problem at the moment is that I randomly read a shifted bit, eg 0x04 instead of 0x01.... maybe your hint will solve this.