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[Moved] Mmc_Fat_init () problem in Proteus

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Tareq Domi

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hello guys !

i need to interface an SD/MMC card with PIC 18F4520 , just to read/write a text file .
well , i wrote a simple code on Mikroc as a start , but i faced a problem once i use "Mmc_fat_init() " .

here is the code :
Code: 
sfr sbit Mmc_Chip_Select at RC0_bit;
sfr sbit Mmc_Chip_Select_Direction at TRISC0_bit;

void main() {
      
      SPI1_Init();
     
      SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
       
          error = MMC_Init();
 while(error == 1)
 {
  error = MMC_Init();
 }

 //MMc_Fat_Init() ;
   

       
}

this code is working correctly on proteus , but once i uncomment the line " //MMc_Fat_init() ; " then the initialization fails in the proteus .

anyone can give a help
thanks
 

Have you disabled ADC and other multiplexed function on RC0 and other pins used for MMC SD Card communication ? Post your complete mikroC project files. Zip and post your Proteus file. Have you created an .mmc file to load into MMC model of Proteus using winImage 8.9 ?
 
well , here is my full project attached

in my program you will find LINE #70 commented , once you uncomment that line then every thing goes oddly !!

also , i have a couple of images i think it will make sense for you :

Screenshot_1.jpgScreenshot_2.jpgScreenshot_3.jpgScreenshot_4.jpg

so what do you think the problem is ?
thanks
 

Attachments

  • mmc_project.rar
    133 KB · Views: 59

It works. I have renamed the .IMA file to .mmc for use with Proteus. I have imported your Proteus 7.x file to 8.1 format. Load the .mmc file to SD Card model and simulate.
 

Attachments

  • mmc_project.rar
    199.9 KB · Views: 51
how it works !!!!!

i have already renamed the .IMA file into .mmc file !!
same problem !!

i tried your hex file with the proteus file and it works !!!
what does that men !!!?

- - - Updated - - -

well , as for the attached file you gave me , it seems there is one justification .
i think the problem is on the compiler itself , it seems am using a compiler with some limits on libraries .

to check if that is true , could you please compile the attached .c file and give me the hex file .
if it works then the problem is related to my compiler .

thanks .
 

Attachments

  • testcompiler.rar
    984 bytes · Views: 43

I have made some changes to the code. I have made TRISx, PORTx, LATx initializations and have used LATx for LCD abit defines. For PIC18F you have to write to LATx registers to output data. I am using mikroC PRO PIC 6.4.0. Make a copy of attached project and compile it and see if there is any difference between my .hex file and yours.

111443d1416237162-sdcard.png
 

Attachments

  • test.rar
    185.3 KB · Views: 44
  • sdcard.png
    sdcard.png
    41 KB · Views: 89
your attached .hex file works with me , and the result is same as the image you attached .

i compiled the attached test.c file and tested the .hex file ,,, same problem again !

so it is a compiler issue .
thanks alot
 

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