microSD cardslot on Pinquino micro

[ClassX]

I have a problem initiating microSd cards which are inserted in the Pinquino card slot (using RB13 as CS).
When I connect the microSD card via a seprate socket to the EXT port (using RF0 as CS), I have no problem with the same microSD card. Am I doing something wrong?

[LubOlimex]

Hey ClassX,

The best idea would be to examine the SD card project we have available at the web page of PIC32-PINGUINO-MICRO: https://www.olimex.com/Products/Duino/PIC32/_resources/PINGUINO(-OTG)(-MICRO)+SD_CARD_rev_543.zip

Did you also check this wiki article: http://wiki.pinguino.cc/index.php/Category:SD_Library?

Best regards,
Lub/OLIMEX

[ClassX]

Well, after some long and hard thinking, I found the problem. Apparently, port B13 is by default configured for JTAG. The following code made it possible to use b13 as a digital output and to drive SDCS in the standard way (SDCS = 1 or SDCS = 0).

#include "plib.h"                        // include peripheral library

mJTAGPortEnable(0);                      // Disable JTAG
PORTSetPinsDigitalOut(IOPORT_B, BIT_13); // Configure PORTB B13 as output.

One needs a lot of experience to develop the gut feel to successfully program microcontrolers...

[LubOlimex]

Hey ClassX,

Glad you got it going!

Well, if it  in time, after you've gained some experience, you will start to solve problems quicker.

Best regards,
Lub/OLIMEX

[Embedded]

Thankx ClassX

You just solved my issue with the SD card too. I'm using Mikro C and their bootloader and couldn't figure why it wouldn't talk to the micro SD.

in C:

  JTAGEN_bit = 0;        // Disable JTAG

Here's the pin definition for B13:

// MMC module connections
sbit Mmc_Chip_Select at LATB13_bit;
sbit Mmc_Chip_Select_Direction at TRISB13_bit;

Cheers..