C51编程:急切求助93C46的读写!!!!
有谁用过AT93C46啊,我的程序为什么总不能正确读写。请各位大虾指点小弟。万分感激。
我的邮件tiger420@163.com
(我的读写函数如下)
// Write enable must precede all programming modes.
void Ewen(void) {
unsigned char temp,InData;
CS=0;
SK=0;
CS=1;
InData=0x98; // 10011XXXX
for(temp=9;temp!=0;temp--) { // 9
DI=InData&0x80;
SK=1; SK=0;
InData<<=1;
}
CS=0;
}
// Disables all programming instructions.
void Ewds(void) {
unsigned char temp,InData;
CS=0;
SK=0;
CS=1;
InData=0x80; // 10000XXXX
for(temp=9;temp!=0;temp--) { // 9
DI=InData&0x80;
SK=1; SK=0;
InData<<=1;
}
CS=0;
}
// Reads data stored in memory, at specified address.
unsigned int Read_data(unsigned char address) {
unsigned char temp;
unsigned int result;
Ewen();
SK=0; DI=1; // 110 A5-A0
CS=0; CS=1;
SK=1; SK=0; //
address=address&0x3f|0x80;
for(temp=8;temp!=0;temp--) { // 8
DI=address&0x80;
SK=1; SK=0;
address<<=1;
}
DO=1;
for(temp=16;temp!=0;temp--) { // 16
SK=1;
result=(result<<1)|DO;
SK=0;
}
CS=0;
Ewds();
return(result);
}
// Write_datas memory location An - A0.
void Write_data(unsigned char address,unsigned int InData) {
unsigned char temp;
Ewen();
SK=0; DI=1; // 101 A5-A0
CS=0; CS=1;
SK=1; SK=0; // 1
address=address&0x3f|0x40;
for(temp=8;temp!=0;temp--) { // 8
DI=address&0x80;
SK=1; SK=0;
address<<=1;
}
for(temp=16;temp!=0;temp--) { // 16
DI=InData&0x8000;
SK=1; SK=0;
InData<<=1;
}
CS=0; DO=1;
CS=1; SK=1;
while(DO==0) { // busy test
SK=0; SK=1;
}
SK=0; CS=0;
Ewds();
}
unsigned char ReadChar(unsigned char address) {
unsigned char temp=address>>1;
if(address&0x01) return((unsigned char)(Read_data(temp)>>8));
else return((unsigned char)(Read_data(temp)));
}
void WriteChar(unsigned char address,unsigned char InData) {
unsigned char temp=address>>1;
if(address&0x01) Write_data(temp,(unsigned int)(Read_data(temp)
&0x00ff|(InData<<8)));
else Write_data(temp,(unsigned int)(Read_data(temp)&0xff00|InData));
}
发表时间:2002年10月10日17:40:00