MikroC & SD CARD & PIC18F4520

[Linspire]

Does anyone know what's allocation size to set for mikroC to work ?
I have formatted into FAT using windows XP and allocation size default.


Linspire

 

[bigdogguru]

The SD card must be formatted with FAT16, not FAT32, with the default allocation size. Formatting the SD with FAT16 is a requirement of the MikroC MMC Library.

BigDog

 

[Linspire]

Yap I formatted my sd card into FAT (Windows XP) with default allocation.
When I formatted sd card, I choose option of FAT instead of FAT32.
Still having problem sd card detection.

Linspire

---------- Post added at 18:37 ---------- Previous post was at 17:03 ----------

I have make image clone directly from my SD card.
I did simulation ISIS 7, it's working properly.
Sighed.
Still having problem detection SD card.

Linspire

 

[Linspire]

So weird...
When I tried mikroC user manual example code, it's not working properly.
However, I rewrite my code with following these coding:

  SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE,_SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
  while (Mmc_Init());
  Lcd_Out(1,1,"reintialized");
  Delay_ms(1000);
  Delay_ms(1000);
  // use fat16 quick format instead of init routine if a formatting is needed
  while(1) {

             if (!Mmc_Fat_Init()) {
             SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE,_SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
             ......
             ......
             ......
             break;        // WHEN YOU CREATE FILE, GET OUT OF INFINITE WHILE LOOP
                               }
            }

It's working properly on my hardware.
Why is like that ?
Anyone know how to explain it ?


Linspire

 

[sree_8191]

Can you post your code, so that one of us may look at it? How about a schematic of your design?

How are you interfacing the SD interface with the rest of the circuit? Both SD and MMC are 3.3V devices and therefore need a 3.3V supply and 3.3V I/O either by a level translator or resistor divider.

The following book has several examples of SD interfaces using MikroC:

Advanced PIC Microcontroller Projects in C: From USB to RTOS with the PIC 18F Series

BigDog

Hi Bigdog,
I have posted a very similar querry. Please check it out and suggest me a way out
https://www.edaboard.com/threads/282589/
Thanks in Advance, Regards

 

[jayanth.devarayanadurga]

The below 2 functions should be called once and so they should be in the main() function but before the while(1) loop.

---

Code C - [expand]
1
2
if (!Mmc_Fat_Init()) {
             SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE,_SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);

---

 

[day11]

here u will find how to create an image file https://sites.google.com/site/coolembeddedlaboratory/home/pic18f4550/tutorial-list/memory-card