stm32f4 SDIO setup

[Giovanni]

That means that there is a DMA conflict, you are using another driver that uses the same DMA channel, please verify in mcuconf.h.

Giovanni

[daviddawe1982]

Yes it is using the same DMA stream as SPI1 TX = STM32_DMA_STREAM_ID(2, 3)
I have an lcd connceted to SPI1

[Giovanni]

Some peripherals can be relocated on other DMA channels, see the STM32 RM in the DMA section, you can change mcuconf.h in order to do that.

Giovanni

[daviddawe1982]

So I got the DMA working and now the code does not stop but i still can not connect to the card.
How can I see what the error is with sdcConnect??
Below is my test code and it is printing..
Card Inserted.
Connecting...
Failed.

Code: Select all

sdcStart(&SDCD1, &sdccfg);
   gdispClear(Black);

   if (!blkIsInserted(&SDCD1)) {
      line1 = "Card not inserted, aborting.";
      fheight1 = gdispGetFontMetric(font1, fontHeight)+2;
      gdispFillStringBox(0, 0, widthB,  fheight1, line1, font1, White, Black, justifyCenter);
   }else{
      line1 = "Card inserted.";
      gdispFillStringBox(0, 0, widthB,  fheight1, line1, font1, White, Black, justifyCenter);

     }
      line1 = "Connecting...";
      fheight1 = gdispGetFontMetric(font1, fontHeight)+2;
      gdispFillStringBox(0, (fheight1*2), widthB,  fheight1, line1, font1, White, Black, justifyCenter);
           if (sdcConnect(&SDCD1)) {
           line1 = "Failed.";
           gdispFillStringBox(0, (fheight1*3), widthB,  fheight1, line1, font1, White, Black, justifyCenter);
     }else{
           line1 = "Connected.";
            gdispFillStringBox(0, (fheight1*3), widthB,  fheight1, line1, font1, White, Black, justifyCenter);


     }

[Giovanni]

The best way is to step into the sdcConnect() and see where it fails. Provide the point and the state of relevant variables in that section of code.

Giovanni

[daviddawe1982]

It looks like it fails just after card 2.0 detection and hits
return HAL_FAILED;

[daviddawe1982]

I also have long wires connecting the sd could that be a problem?

[Giovanni]

Definitely, it alredy happened to some users. You need short wires, terminations, bypass caps etc.

Giovanni

[daviddawe1982]

I have rebuilt my interface and now sdcConnect exits at Voltage detection..

[Giovanni]

That would be the very first command sent. I think it is a problem at interface level, the board setup probably, you need to make sure that:
1) The SDIO pins are not connected to other thing on the board.
2) That each SDIO pin is configured correctly in board.h.
3) That each SDIO signal is assigned to only one pin (multiple pins would conflict internally).

Giovanni