用过25LC160请进

只看该作者 · 2011-12-1 20:56

想把数据存放在25LC160中，然后取出显示，但是倒腾了几天都没弄出来，数据手册也看了几遍，找不出问题，麻烦各位大神解释解释，非常感谢。
#include<iom88.h>
#include<avr_macros.h>
#define uchar unsigned char
#define uint  unsigned int
#define SPI_CS PORTD_Bit5
#define SPI_SCK PORTB_Bit5
#define SPI_HOLD  PORTD_Bit7
#define SPI_SI PORTB_Bit3
#define SPI_SO PORTB_Bit4
#define SPI_WP PORTD_Bit6
#define SPI_RE_SO (PINB&0X10)
uchar table[] = {0xc0,0xf9,0xa4,0xb0,0x99,
               0x92,0x82,0xf8,0x80,0x90};//0～9
void delay(uchar x)
{
  uchar kk;
  for(;x>0;x--)
for(kk=100;kk>0;kk--);
}
/**********************************************************
  读字节数据子函数
  MCU从SPI读出数据
**********************************************************/
uchar SPI_READ()
{
  uchar dat;
  uchar i;
  SPI_CS = 0;
  DDRB &= 0XEF;
  for(i=0;i<8;i++)
  {
SPI_SCK = 0;
delay(1);
dat = dat<<1;
if(SPI_RE_SO)
   dat |= 0x01;
SPI_SCK = 1;
  }
  return dat;
}
/**********************************************************
  写字节数据子函数
  MCU写数据到SPI，
**********************************************************/
void SPI_WRITE(uchar dat)
{
  uchar i;
  SPI_CS = 0;
  for(i=0;i<8;i++)
  {
SPI_SCK = 0;
delay(1);
if(dat&0x80)
   SPI_SI = 1;
else
   SPI_SI = 0;
SPI_SCK = 1;
dat = dat<<1;
  }
}
void WREN()  //写允许
{
  SPI_CS = 0;
  delay(1);
  SPI_WRITE(0x06);
  SPI_CS = 1;
}
/**********************************************************
  写字节数据子函数
  将数据写入指定地址
**********************************************************/
void Write_byte(uint add,uchar dat)
{
  uchar add_h,add_l;
  SPI_CS = 0;
  add_h = add>>8;
  add_l = add&0x00ff;
  SPI_WRITE(0x02);
  SPI_WRITE(add_h);
  SPI_WRITE(add_l);
  SPI_WRITE(dat);
  SPI_CS = 1;
}
uchar Read_byte(uint add)  //将数据从16bit地址读出
{
  uchar add_h,add_l;
  uchar value;
  SPI_CS = 0;
  add_h = add>>8;
  add_l = add&0x00ff;
  SPI_WRITE(0x03);
  delay(1);
  SPI_WRITE(add_h);
  SPI_WRITE(add_l);
  delay(1);
  value = SPI_READ();
  SPI_CS = 1;
  return value;
}

void WRDI()  //写禁止
{
  SPI_CS = 0;
  delay(1);
  SPI_WRITE(0x04);
  SPI_CS = 1;
}
uchar RDSR()  //读状态寄存器
{
  uchar value;
  SPI_CS = 0;
  delay(1);
  SPI_WRITE(0x05);
  value = SPI_READ();
  SPI_CS = 1;
  return value;
}
void WRSR(uchar stat)  //写状态寄存器
{
  SPI_CS = 0;
  delay(1);
  SPI_WRITE(0x01);
  SPI_WRITE(stat);
  SPI_CS = 1;
}
void SPI_init(void)
{
  SPI_CS = 1;
  delay(1);
  SPI_SCK = 1;
  WREN();
  delay(20);
  WRSR(0X02);
  delay(20);
}

void main(void)
{
  uchar temp=0;
  DDRD = 0XFF;
  DDRB = 0X2C;
  DDRC = 0xff;
  PORTD &= 0XEF;
  SPI_HOLD = 1;
  SPI_CS = 0;
  SPI_WP  = 1;
  SPI_init();
  while(1)
  {
Write_byte(0x0001,0x55);
temp = Read_byte(0x0001);
PORTC = table[temp%10];
  }
}

只看该作者 · 2011-12-1 21:40

各位大神帮忙看下 1# 久之1990

用过25LC160请进

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