2.4 TFT彩屏的原理图 接口电路图 含SD卡程序

2.4 TFT彩屏的原理图 接口电路图

SD卡程序:*****main.c*****

#include

//=============================================================

//SD Card Pin Assignment

sbit SD_CLK = P1^1;

sbit SD_DI  = P1^2;

sbit SD_DO  = P1^0;

sbit SD_CS  = P1^3;

//===========================================================

//Buffer

unsigned char xdata DATA[512];

//===========================================================

//Write SD Card

void SdWrite(unsigned char n)

{

unsigned char i;

for(i=8;i;i--)

{

SD_CLK=0;

SD_DI=(n&0x80);

n<<=1;

SD_CLK=1;

}

SD_DI=1;

}

//===========================================================

//Read SD Card

unsigned char SdRead()

{

unsigned char n,i;

for(i=8;i;i--)

{

SD_CLK=0;

SD_CLK=1;

n<<=1;

if(SD_DO) n|=1;

}

return n;

}