我在尝试用STM32读写93C46,但是都没成功,请大神门指点下,程序如下,从网上拿的51例子改的。
[mw_shl_code=c,true]#include "stm32f10x.h"
#include "sys.h"
#include "stdio.h"
#include "public.h"
#include "delay.h"
//定义I/O
#define CS PCout(4)
#define SK PCout(5)
#define DI PCout(6)
#define DO PDin(3)
//extern unsigned char ReadChar(unsigned char address);
//extern void WriteChar(unsigned char address,unsigned char InData);
//extern void ReadString(unsigned char data *RamAddress,unsigned char //RomAddress,unsigned char Number);
//extern void WriteString(unsigned char data *RamAddress,unsigned char //RomAddress,unsigned char Number);
// Write enable must precede all programming modes.
void Ewen(void)
{
unsigned char temp,InData;
CS=0;
SK=0; Delay_us(1);
CS=1;
InData=0x98; // 10011XXXX
for(temp=9;temp!=0;temp--)
{ // 9
if(InData>=0x80)DI=1;
else DI=0;
SK=1;Delay_us(1); SK=0;Delay_us(1);
InData<<=1;
}
CS=0;
}
// Disables all programming instructions.
void Ewds(void)
{
unsigned char temp,InData;
CS=0;
SK=0; Delay_us(1);
CS=1;
InData=0x80; // 10000XXXX
for(temp=9;temp!=0;temp--)
{ // 9
if(InData>=0x80)DI=1;
else DI=0;
SK=1;Delay_us(1);SK=0; Delay_us(1);
InData<<=1;
}
CS=0;
}
// Reads data stored in memory, at specified address.
unsigned int Read(unsigned char address)
{
unsigned char temp;
U16 result;
Ewen();
SK=0;Delay_us(1); DI=1; // 110 A5-A0
CS=0; CS=1;
address=address&0x3f|0x80;
for(temp=8;temp!=0;temp--)
{ // 8
if(address>=0x80)DI=1;
else DI=0;
// DI=address&0x80;
SK=1;Delay_us(1); SK=0;Delay_us(1);
address<<=1;
}
SK=1;Delay_us(1); SK=0;Delay_us(1); // 1
DO=1;
Delay_us(1);
for(temp=16;temp!=0;temp--)
{ // 16
SK=1; Delay_us(1);
result=(result<<1)|DO;
SK=0; Delay_us(1);
}
CS=0;
Ewds();
return(result);
}
// Writes memory location An - A0.
void Write(unsigned char address,U16 InData)
{
unsigned char temp;
Ewen();
Delay_us(5);
// 101 A5-A0
CS=0; CS=1;
DI=1;
SK=0;Delay_us(1);
address=(address&0x3f)|0x40;
for(temp=8;temp!=0;temp--)
{ // 8
if(address>=0x80)DI=1;
else DI=0;
SK=1;Delay_us(1); SK=0; Delay_us(1);
address<<=1;
}
for(temp=16;temp!=0;temp--)
{ // 16
if(InData>=0x8000)DI=1;
else DI=0;
SK=1;Delay_us(1);
SK=0; Delay_us(1);
InData<<=1;
}
SK=1; Delay_us(1);
CS=0; DO=1;
SK=0;Delay_us(1); // 1
CS=1; SK=1; Delay_us(1);
while(DO==0)
{ // busy test
SK=0; Delay_us(1);
SK=1; Delay_us(1);
}
SK=0;Delay_us(1);
CS=0;
Delay_us(5);
Ewds();
}
/*
// Erase memory location An - A0.
void Erase(unsigned char address) {
unsigned char temp;
Ewen();
SK=0; DI=1; // 111 A5-A0
CS=0; CS=1;
SK=1; SK=0; // 1
address|=0xc0;
for(temp=8;temp!=0;temp--) { // 8
DI=address&0x80;
SK=1; SK=0;
address<<=1;
}
CS=0; DO=1;
CS=1; SK=1;
while(DO==0) {
SK=0; SK=1;
}
SK=0; CS=0;
Ewds();
}
// Erases all memory locations. Valid only at VCC = 4.5V to 5.5V.
void Eral(void) {
unsigned char temp,InData;
Ewen();
CS=0;
SK=0;
CS=1;
InData=0x90; // 10010XXXX
for(temp=9;temp!=0;temp--) { // 9
DI=InData&0x80;
SK=1; SK=0;
InData<<=1;
}
CS=0; DO=1;
CS=1; SK=1;
while(DO==0) {
SK=0; SK=1;
}
SK=0; CS=0;
Ewds();
}
// Writes all memory locations. Valid only at VCC = 4.5V to 5.5V.
void Wral(unsigned int InData) {
unsigned char temp,address;
Ewen();
CS=0;
SK=0;
CS=1;
address=0x88; // 10001XXXX
for(temp=9;temp!=0;temp--) { // 9
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) {
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(temp)>>8));
// else return((unsigned char)(Read(temp)));
//}
//void WriteChar(unsigned char address,unsigned char InData)
//{
// unsigned char temp=address>>1;
// if(address&0x01) Write(temp,(unsigned int)(Read(temp)&0x00ff|(InData<<8)));
// else Write(temp,(unsigned int)(Read(temp)&0xff00|InData));
//}
//void ReadString(unsigned char data *RamAddress,unsigned char RomAddress,unsigned char Number)
//{
// while(Number!=0)
// {
// *RamAddress=ReadChar(RomAddress);
// RamAddress++;
// RomAddress++;
// Number--;
// }
//}
//void WriteString (unsigned char data *RamAddress,unsigned char RomAddress,unsigned char Number)
//{
// unsigned int temp;
// if(Number==0) return;
// if(RomAddress&0x01)
// {
// WriteChar(RomAddress,*RamAddress);
// RamAddress++;
// RomAddress++;
// Number--;
// }
// if(Number==0) return;
// while(Number>>1)
// {
// temp=*RamAddress;
// RamAddress++;
// temp=temp|(*RamAddress)<<8;
// RamAddress++;
// Write(RomAddress>>1,temp);
// RomAddress++;
// RomAddress++;
// Number--;
// Number--;
// }
// if(Number)
// {
// WriteChar(RomAddress,*RamAddress);
// }
//}[/mw_shl_code]
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