main.c

The high portable FAT filesystem library for embedded system.

/*****************************************************************************
  File name:    main.c
  Description:  The main module for the Circuit Cellar FATLIB sample program.

  This code assumes that the MMC/SD card is hooked up to an MSP430F449 as
  per the schematic in the article.
******************************************************************************
            Change Log
     Date       By Whom                     Change
--------------+-------------------+-------------------------------------------
  Jan-03-2005  William Hue         Created.
  
******************************************************************************/

#include <string.h>

#include "fatlib.h"


// Local prototypes:
static void cpu_init(void);
static void lcd_print(char *string);


// Functions:

int main(void)
{
    signed int stringSize;
    signed char handle;
    char stringBuf[100];

    cpu_init(); // Initialise the CPU clocks, etc.

    eint(); // Enable global interrupts (if required).

    fat_initialize();   // Initialise the FAT library.

    handle = fat_openRead("hello.txt");
    if (handle >= 0)
    {
        stringSize = fat_read(handle, stringBuf, 99);
        stringBuf[stringSize] = '\0';
        lcd_print(stringBuf);
        fat_close(handle);
    }

   	handle = fat_openWrite("goodbye.txt");
    if (handle >= 0)
    {
        strcpy(stringBuf, "Goodbye World!");
        stringSize = strlen(stringBuf);
        fat_write(handle,stringBuf, stringSize);
        fat_flush();    // Optional.
        fat_close(handle);
    }

    while (1)
    {
        // Stay here.
    }
}


/*****************************************************************************
  Name:         cpu_init

  Parameters:   none

  Returns:      nothing

  Description:  This method initializes the MSP430 chip.
*****************************************************************************/
static void cpu_init(void)
{
    // Stop watchdog timer
    WDTCTL = WDTPW + WDTHOLD;

    //set up system clocks
    SCFQCTL = 108;          // No modulation; DCO = 2x(108+1) x 32768 = 7.143424Mhz
    SCFI0 |= FLLD0 | FN_3;  // 7MHz nominal DCO; divide DCO by 2 in FLL
    FLL_CTL0 = DCOPLUS | XCAP18PF;  // Give us 2x freq.; set load capacitance for xtal
    FLL_CTL1 = 0x20;        // set the DCO as source for MCLK and SMCLK; turn off xtal2
}


static void lcd_print(char *string)
{
    // Implement as appropriate.
}