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93C46、24C02讀寫練習實驗程序

2474220 2017-09-05 | rar | 0.1 MB | 次下載 | 免費

資料介紹

#include
#include
//define OP code
#define OP_EWEN_H??0x00?// 00?????write enable
#define OP_EWEN_L??0x60?// 11X XXXX????write enable
#define OP_EWDS_H??0x00?// 00?????disable
#define OP_EWDS_L??0x00?// 00X XXXX????disable
#define OP_WRITE_H??0x40?// 01 A6-A0????write data
#define OP_READ_H??0x80?// 10 A6-A0????read data
#define OP_ERASE_H??0xc0?// 11 A6-A0????erase a word
#define OP_ERAL_H??0x00?// 00?????erase all
#define OP_ERAL_L??0x40?// 10X XXXX????erase all
#define OP_WRAL_H??0x00?// 00? ?????write all?
#define OP_WRAL_L??0x20?// 01X XXXX?? ??write all?

//define pin
sbit CS = P3^4;
sbit SK = P3^3;
sbit DI?= P3^5;
sbit DO = P3^6;
unsigned char code dis_code[] = {0x7e,0xbd,0xdb,0xe7,0xdb,0xbd,0x7e,0xff};
void start();
void ewen();
void ewds();
void erase();
void write(unsigned char addr, unsigned char indata);
unsigned char read(unsigned char addr);
void inop(unsigned char op_h, unsigned char op_l);
void shin(unsigned char indata);
unsigned char shout();
void delayms(unsigned char ms);
main()
{
?unsigned char i;
?CS = 0;????//初始化端口
?SK = 0;
?DI = 1;
?DO = 1;
?ewen();????// 使能寫入操作
?erase();???// 擦除全部內容
??
?for(i = 0 ; i < 8; i++)??//寫入顯示代碼到AT93C46
?{
??write(i, dis_code[i]);
?}
?
?ewds();????// 禁止寫入操作?
?
?i = 0;
?while(1)
?{
??P0 = read(i);?// 循環讀取AT93C46內容，并輸出到P0口
??i++;
??i &= 0x07;??// 循環讀取地址為0x00～0x07
??delayms(250);??
?}
}

void write(unsigned char addr, unsigned char indata)
// 寫入數據indata到addr
{
?inop(OP_WRITE_H, addr);?// 寫入指令和地址
??shin(indata);
??CS = 0;
?delayms(10);???// Twp
}
unsigned char read(unsigned char addr)
// 讀取addr處的數據
{
?unsigned char out_data;
?inop(OP_READ_H, addr);?// 寫入指令和地址
?out_data = shout();
?CS = 0;?
?return out_data;
}
void ewen()
{
?inop(OP_EWEN_H, OP_EWEN_L);
?CS= 0;
}
void ewds()
{
?inop(OP_EWDS_H, OP_EWDS_L);
?CS= 0;?
}
void erase()
{
?inop(OP_ERAL_H, OP_ERAL_L);
?delayms(30);
?CS = 0;
}

void inop(unsigned char op_h, unsigned char op_l)
//移入op_h的高兩位和op_l的低7位
//op_h為指令碼的高兩位
//op_l為指令碼的低7位或7位地址
{?
?unsigned char i;
?
?SK = 0;??// 開始位
?DI = 1;
?CS = 1;
?_nop_();
?_nop_();?
?SK = 1;
?_nop_();
?_nop_();
?SK = 0;??// 開始位結束
?DI = (bit)(op_h & 0x80);?// 先移入指令碼高位
?SK = 1;
?op_h <<= 1;
?SK = 0;??
?DI = (bit)(op_h & 0x80);?// 移入指令碼次高位
?SK = 1;
?_nop_();
?_nop_();?
?SK = 0;
?
?// 移入余下的指令碼或地址數據
?op_l <<= 1;?
?for(i = 0; i < 7; i++)??
?{
??DI = (bit)(op_l & 0x80);?// 先移入高位
??SK = 1;
??op_l <<= 1;
??SK = 0;??
?}
?DI = 1;??
}

void shin(unsigned char indata)??
//移入數據
{
?unsigned char i;
?for(i = 0; i < 8; i++)
?{
??DI = (bit)(indata & 0x80);?// 先移入高位
??SK = 1;
??indata <<= 1;
??SK = 0;??
?}
?DI = 1;
}
unsigned char shout(void)???
// 移出數據
{
?unsigned char i, out_data;
?for(i = 0; i < 8; i++)
?{
??SK = 1;
??out_data <<= 1;
??SK = 0;
??out_data |= (unsigned char)DO;
?}
?return(out_data);
}
void delayms(unsigned char ms)?
// 延時子程序
{??????
?unsigned char i;
?while(ms--)
?{
??for(i = 0; i < 120; i++);
?}
}
?