dm642main.c

FAT系统文件格式编程

/********************************************************************/
/*  Copyright 2004 by SEED Incorporated.							*/
/*  All rights reserved. Property of SEED Incorporated.				*/
/*  Restricted rights to use, duplicate or disclose this code are	*/
/*  granted through contract.									    */
/*  															    */
/********************************************************************/
#include <stdio.h>
#include <csl.h>
#include <std.h>
#include <csl_emifa.h>
#include <csl_irq.h>
#include <csl_chip.h>
#include <csl_timer.h>

#include "seeddm642.h"
#include "SEEDVMP642_fat32.h"
void SEEDDM642_wait(Uint32 delay);
/*SEEDDM642的emifa的设置结构*/
EMIFA_Config Seeddm642ConfigA ={
	   0x00052078,/*gblctl EMIFA(B)global control register value */
	   			  /*将CLK6、4、1使能；将MRMODE置1；使能EK2EN,EK2RATE*/
	   0xffffffd3,/*cectl0 CE0 space control register value*/
	   			  /*将CE0空间设为SDRAM*/
	   0x73a28e01,/*cectl1 CE1 space control register value*/
	   			  /*Read hold: 1 clock;
	   			    MTYPE : 0000,选择8位的异步接口
	   			    Read strobe ：001110；14个clock宽度
	   			    TA：2 clock; Read setup 2 clock;
	   			    Write hold :2 clock; Write strobe: 14 clock
	   			    Write setup :7 clock
	   			    --					 ---------------
	   			  	  \		 14c		/1c
	   			 	   \----------------/ */
	   0xac2ab02f, /*cectl2 CE2 space control register value*/
	   			   /*Read hold :
	   			   */
       0x22a28a42, /*cectl3 CE3 space control register value*/
	   0x57115000, /*sdctl SDRAM control register value*/
	   0x0000081b, /*sdtim SDRAM timing register value*/
	   0x001faf4d, /*sdext SDRAM extension register value*/
	   0x00000002, /*cesec0 CE0 space secondary control register value*/
	   0x00000002, /*cesec1 CE1 space secondary control register value*/
	   0x00000002, /*cesec2 CE2 space secondary control register value*/
	   0x00000073 /*cesec3 CE3 space secondary control register value*/	
};
CHIP_Config SEEDDM642percfg = {
	CHIP_VP2+\
	CHIP_VP1+\
	CHIP_VP0+\
	CHIP_I2C+\
	CHIP_MCASP0
};


Uint32 read_buffer[500],write_buffer[500];
char view[30];

extern far void vectors();


void main()
{
	Uint32 i;
	fat32_file_handle fp;
	Bool j;
/*-------------------------------------------------------*/
/* perform all initializations                           */
/*-------------------------------------------------------*/
	/*Initialise CSL，初始化CSL库*/
	CSL_init();
	CHIP_config(&SEEDDM642percfg);
/*----------------------------------------------------------*/
	/*EMIFA的初始化，将CE0设为SDRAM空间，CE1设为异步空间
	 注，DM642支持的是EMIFA，而非EMIF*/
	EMIFA_config(&Seeddm642ConfigA);
/*----------------------------------------------------------*/
	/*中断向量表的初始化*/
	//Point to the IRQ vector table
    IRQ_setVecs(vectors);
    IRQ_nmiEnable();
    
    
/*----------------------------------------------------------*/
	for(i = 0;i<500;i++)
	{
		read_buffer[i] = 0;
		write_buffer[i] = i;
	}
/*----------文件函数测试------------------------------------------*/

	j=fat32_install ();
	if(j==FALSE)
		for(;;){}		
	j=fat32_create("test1.txt" );	
	fp=fat32_file_open("test1.txt");
	i=fp;
	i=fat32_file_write(fp,(Byte *)write_buffer,2000);
	if(i!=2000)
		for(;;){}	


	i=fat32_file_seek(fp,0,1,0);
	i=fat32_file_read(fp,(Byte *)read_buffer,500);
	i=fat32_file_read(fp,(Byte *)read_buffer,1000);	
	i=fat32_file_read(fp,(Byte *)read_buffer,1500);	
	i=fat32_file_seek(fp,0,1,0);
	i=fat32_file_read(fp,(Byte *)read_buffer,500);
	i=fat32_file_seek(fp,0,1,1);
	i=fat32_file_read(fp,(Byte *)read_buffer,500);
	i=fat32_file_seek(fp,1,1,1);
	i=fat32_file_read(fp,(Byte *)read_buffer,500);
	i=fat32_file_seek(fp,2,1,0);
	i=fat32_file_seek(fp,2,-1,100);
	i=fat32_file_read(fp,(Byte *)read_buffer,500);

	j=fat32_file_close(fp);	
	GPIO_RSET(GPGC,0x0);/*将GPIO0不做为GPINT使用*/
    GPIO_RSET(GPEN,0x108);
	GPIO_RSET(GPDIR,0x108);/*将GPIO0做为输出*/	
	for(;;)
	{
		/*GPIO3输出为高*/
		GPIO_RSET(GPVAL,0x8);
    	SEEDDM642_wait(0x200000);
    	/*GPIO3输出为低*/
		GPIO_RSET(GPVAL,0x0);
    	SEEDDM642_wait(0x200000);
    	/*GPIO8输出为高*/
		GPIO_RSET(GPVAL,0x100);
    	SEEDDM642_wait(0x200000);
    	/*GPIO8输出为低*/
		GPIO_RSET(GPVAL,0x0);
    	SEEDDM642_wait(0x200000);
    }	



}     
void SEEDDM642_wait(Uint32 delay)
{
    volatile Uint32 i, n;
    
    n = 0;
    for (i = 0; i < delay; i++)
    {
        n = n + 1;
    }
}