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posted on 2013/05/28 04:40:18 AM CEST

Reading data from compact flash fat16

Hi,
The PIC is connected to USB and compact flash fat16. so i need to read data in compact flash through the USB. Since i am new to the mikroC, could anyone please give me some tips about the code to interface USB with fat16 so that i can read data from fat16?
thank you in advance!

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Ahmet Ay

posted on 2013/04/11 11:32:38 AM CEST

Storage

TFT PIC32 FAT32 file system

Hello,

I want to use FAT32 library (download libstock PIC32) but visual tft supported fat16 library.(not FAT32) What do I need to change? and or visual tft supports fat32
please help me?

how to use global definations (fat 16)

// MMC/SD Connections
sbit Mmc_Chip_Select at LATD12_bit;
sbit Mmc_Chip_Select_Direction at TRISD12_bit;
// end of MMC/SD
// TFT Get Data globals
char Ext_Data_Buffer[512];
unsigned long currentSector = -1, res_file_size;
// end of TFT Get Data

void Init_Ext_Mem() {
//--- set up SPI for the file read
PPS_Mapping(104, _OUTPUT, _SDO3);
PPS_Mapping(98, _INPUT, _SDI3);
PPS_Mapping(79, _OUTPUT, _SCK3OUT);
// Initialize SPI
SPI3_Init_Advanced(_SPI_MASTER, _SPI_8_BIT, _SPI_PRESCALE_SEC_4, _SPI_PRESCALE_PRI_16,
_SPI_SS_DISABLE, _SPI_DATA_SAMPLE_END, _SPI_CLK_IDLE_HIGH, _SPI_ACTIVE_2_IDLE);
Delay_ms(10);

// Initialize MMC
if (!Mmc_Fat_Init()) {
// Reinitialize SPI at higher speed
SPI3_Init_Advanced(_SPI_MASTER, _SPI_8_BIT, _SPI_PRESCALE_SEC_2, _SPI_PRESCALE_PRI_16,
_SPI_SS_DISABLE, _SPI_DATA_SAMPLE_END, _SPI_CLK_IDLE_HIGH, _SPI_ACTIVE_2_IDLE);

// Open resource file for read
Mmc_Fat_Assign("%FILE_NAME", 0);
Mmc_Fat_Reset(&res_file_size);
}
}

char* TFT_Get_Data(unsigned long offset, unsigned int count, unsigned int *num) {
unsigned long start_sector;
unsigned int pos;

start_sector = Mmc_Get_File_Write_Sector() + offset/512;
pos = (unsigned long)offset%512;

if(start_sector == currentSector+1) {
Mmc_Multi_Read_Sector(Ext_Data_Buffer);
currentSector = start_sector;
} else if (start_sector != currentSector) {
if(currentSector != -1)
Mmc_Multi_Read_Stop();
Mmc_Multi_Read_Start(start_sector);
Mmc_Multi_Read_Sector(Ext_Data_Buffer);
currentSector = start_sector;
}

if(count>512-pos)
*num = 512-pos;
else
*num = count;

return Ext_Data_Buffer+pos;
}

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Marius Paulet
pauletm

posted on 2013/03/29 07:47:46 AM CET

Storage

Save coordinates from GPS module on sd card.

Hello,

I have a development board Easypic PRO v7 (http://www.mikroe.com/easypic-pro/) with PIC18F87K22 microcontroller, a card MMC / SD Card (http://www.mikroe.com/add-on- boards / storage / mmc-sd /) working on SPI.
I want to buy a GPS module (http://www.mikroe.com/click/gps-l10/) also works with SPI protocol.
Microcontroller data sheet write that has two SPI, one on each port C and port D.

I want to save data from the GPS module coordinates the SD card. Two modules can be coupled together on the development board?

There is a code sample?

Thank you.
Marius