does anybody have info for SD card interface with PIC32 starter kit

What mode do you want to connect to SD card with?? SPI or standard SD Interface??

here is a circuit i used to interface to a different pic, I'm sure you can figure out which pins you are connecting them to on the Pic Starter kit...



Hopefully this helps you guys out, Lucios book covers this too....

Hi,

I have made a breakout of the MicroSD card.
But I was never able to interface it. Since its comm algo is different from the normal SD or so.
Well I would post my PCB and schematics today.

Best of Luck,

Hello,

I am having trouble Interfacing the microSD Card using the PIC-MMD library.
Here are my Connection:

 1
 2microSD                     PIC32MX
 3  Card                      Connection
 4    CD           ==>          Not Connected
 5    CS           ==>          RD14
 6    DI            ==>          SDO1/RF8
 7  VDD           ==>         +3.3V
 8  SCLK          ==>         SCK1/INT0/RF6
 9  GND           ==>          GND
10  DO             ==>         SDI1/RF7
11  WP             ==>         Not Available

For the same I modified the Init code:
HardwareProfile.h

 1    #elif defined (USE_PIC32) //*******  32-bit  *******
 2        #define SD_CS                PORTDbits.RD14//PORTBbits.RB1
 3        #define SD_CS_TRIS            TRISDbits.TRISD14//TRISBbits.TRISB1
 4       
 5        #define SD_CD                PORTFbits.RF0
 6        #define SD_CD_TRIS            TRISFbits.TRISF0
 7       
 8        #define SD_WE                PORTFbits.RF1
 9        #define SD_WE_TRIS            TRISFbits.TRISF1

Also for the Main File since I didn't have the WP,CD etc.
Demostration.c

 1#elif defined (__PIC32MX__)
 2   // Turn on the interrupts
 3   INTEnableSystemMultiVectoredInt();
 4   SYSTEMConfigPerformance(GetSystemClock());
 5   mOSCSetPBDIV(OSC_PB_DIV_1);
 6   
 7   //Initialize the RTCC
 8  // RtccInit();
 9  // while(RtccGetClkStat()!=RTCC_CLK_ON);// wait for the SOSC to be actually running and RTCC to have its clock source
10                                        // could wait here at most 32ms
11  // RtccOpen(0x10073000, 0x07011602, 0);
12#endif
13
14  // while (!MDD_MediaDetect());
15
16   // Initialize the library
17   while (!FSInit());
18 

Please help me out with this.

Thanks,

Boseji

Hello,

I have pulled up all the lines except and SCK pin. As per the SD card data sheet it is required.
I am using microSD so there is no sperate CD pin. I am not sure how to render this requirement.

Please let me know on this,

Boseji

Hello,

Thanks a lot for your help.
I did as you asked and what it Worked!!

Here is what I modified in the HardwareProfile.h

 1
 2    #elif defined (USE_PIC32) //*******  32-bit  *******
 3        #define SD_CS                PORTDbits.RD14//PORTBbits.RB1
 4        #define SD_CS_TRIS            TRISDbits.TRISD14//TRISBbits.TRISB1
 5       
 6        #define SD_CD                0//PORTFbits.RF0
 7        #define SD_CD_TRIS            TRISFbits.TRISF0
 8       
 9        #define SD_WE                0//PORTFbits.RF1
10        #define SD_WE_TRIS            TRISFbits.TRISF1

Also I disabled the RTCC since I dont have a crystal on my board but hope to put one.

I will put up the stripped version of this driver so that its beneficial for all the other folks who want to use MicroSD without the hassles.

Thanks again for your generous help,

Boseji

Hello,

I have streamlined the code from MCHP and made it possible to be configured for SD card only.
You can have a look at my Project's Code Section.

Best of Luck,

Boseji

Hello,

I have made the connection to a MicroSD breakout that I had built.
Here is the Circuit

 1
 2microSD                     PIC32MX
 3 Card                       Connection
 4 CD           ==>          Not Connected
 5 CS           ==>          RD14
 6 DI           ==>          SDO1/RF8
 7 VDD          ==>          +3.3V
 8 SCLK         ==>          SCK1/INT0/RF6
 9 GND          ==>          GND
10 DO           ==>          SDI1/RF7
11 WP           ==>          Not Available

Here is the Breakout Picture:



Also there is a modification required in the HardwareProfile.h file.

 1
 2     #elif defined (USE_PIC32) //*******  32-bit  *******
 3         #define SD_CS                PORTDbits.RD14//PORTBbits.RB1
 4         #define SD_CS_TRIS            TRISDbits.TRISD14//TRISBbits.TRISB1
 5       
 6         #define SD_CD                0//PORTFbits.RF0
 7         #define SD_CD_TRIS            TRISFbits.TRISF0
 8       
 9         #define SD_WE                0//PORTFbits.RF1
10         #define SD_WE_TRIS            TRISFbits.TRISF1

And it should work fine with the demo app included by Microchip.
Let me know in case any one requires the Gerber/PCB.

Best of Luck,

Boseji

I'm not sure what you're really asking, but if I'm guessing right, the answer is:

There are functions for doing file I/O to the SD card, such as creating files and directories, writing files, appending files, reading files, etc. So you can store any data you want, and you decide what format to write the data (list, array, text, etc.).
You can also store data in raw blocks, instead of using a file structure.

Pete

Hi,

I have used the MCHP SD lib for my purpose. Its quite friendly and now I am able to stream ADC data directly to a file and also append it. Using the same lib.
Hope that it may help you too.

Best of Luck,

Boseji

You are correct in that you would not be able to use internal memory for that type of manipulation

640 x 480 x 2bytes (Presuming 16 bit INT - on PIC32 it may be 32 bit int - have not checked yet)
= 614400 /1024 = 600KBytes


options I see at this stage...

1. Add static RAM using the parallel master port and write functions to read/write data as the arrays you need.
Not really an option if you need >128Kbyte as it only has 16Bit address + 16Bit Data interface.... but can be expanded by using external Logic.

2. Use file manupulation techniques (i.e. fopen/fwrite etc) - slower but can easily acheive what you want, and can be experimented with on a normal PC first.
Warning: I dont think the Microchip FAT stacks have error detection and the ability to lock out faulty blocks (correct me if I am wrong) as this is essential if using FLASH type cards (SD/Compact flash etc). This is slower than option 1

3. Attach NAND FLASH type memory - looks like an IDE hard drive.... same issues as #2, but can use the Parallel master port and should be faster than SPI interface.... come in many sizes... got given an 8GB one as part of a buisness card from a supplier.... BGA package though!


Mike

I am very intererested in using an SD card in some of my own projects.

Does one have to keep a record of where the last data was stored as one has to do with using a 24LCxx memory chip ?

If the answer to this is yes surely it is an enormous job to keep track of where the data is ....

SD, CF memory cards, and USB drives have error detection and correction built into their memory controller. They also handle block management and wear leveling themselves.

Can you tell us the EXACT configuration that you have.

1. Development boards you are using
2. If your own custom board - post a schematic etc
3. Compiler and stack versions


I have used microSD cards with the PIC32 in several designs over the past year without any issue... just changing the stack to think a card is actually inserted because there is no Card Detect on the uSD card sockets I used.

Mike

Other speed-related settings I'm using:

#define GetSystemClock() (72000000ul) // 8 MHz/2 x 18 PLL = 72 Mhz
#define GetPeripheralClock() (GetSystemClock()/(1<<OSCCONbits.PBDIV))
#define GetInstructionClock() (GetSystemClock())

Pete

I had just checked the code I have on here and it is the updated one where I fixed it to work on SPI2.

Make sure you double check your actual pin connections to the ones in the HardwareProfile.h to make sure they match......
I attached the files needed to test your sd card interface with....

Attachments:

Tempcode.zip (93.0k)

Another hint related to pin hookups:
As I recall, the names of the SI and SO signals on the SD card are *with respect to the Master, not the SD card*. So "SO" is the data *input* to the card. On my first SD card implementation, I had them backwards...

Pete

I'm trying to get a UBW32 (Pic PIC32MX460) working with a SD card --

I've downloaded Microchip's SD Demo, and am stuck at the FSInit() function. I'm not able to get a response from the SD card.

I've followed all of the above suggestions; have voltage divider resistors on the SDO1, SCK1, and SS1 pins, as well as 10k pull-up resistors. I've modified Hardware.h to reflect the pin assignments for this chip:

sdi1 (rc4)
sdo1 (rd0)
sck1 (rd10)
ss1 (rd9)

And slowed down the SPI communications.

I've hooked up a scope and am seeing some odd behavior - the chip select (SS) seems to behaving correctly, but the clock (SCK) looks like it's transmitting data, not a clock signal, and it's sligtly skewed & sending data slightly before the SS triggers. SDO is always high (as well as SDI, but that's expected since it's not communicating).

This is the first time I've played with SPI communications, I'm stuck, any suggestions?

Thanks!

Attachments:

MDD File System-SD Card.zip (30.1k)

Hi Boseji,

I am new to the PIC32 and I was going through your code. I took the SDMMC.c and the SDMMC.h and put them in a new project. As I have no clue on how the RTOS works I changed the delay function for a while(--time). I wrote a Main where I put the functions initSD(); writeSECTOR( 0x55, 0); deinitSD(); The thing is that I start debugging and it stays stuck at initSD();. I wanted to ask if you could know what Im doing wrong.

Thank you.

Manuel