好久沒有上來發問題了，最近又遇上了問題，
之前發過８０５１控制ＤＳ１３０２的文，
後來也順利解決了，現在問題來了，
我要用ＣＣ２４３０來控制這個ＤＳ１３０２，
我用之前在８０５１上的ＣＯＤＥ來修改（確定在０８５１是可以動作的），
可是現在用在ＣＣ２４３０上卻無法順利動作，
我想ＤＳ１３０２的電路是沒問題的，
附上現在用的ＤＳ１３０２的程式碼：
[code cpp]
#include
#define RST P0_2
#define IO P0_3
#define SCLK P0_4
//************************************************************
void writeRTCdata(unsigned char d)
{
P0DIR = 0x0E;
unsigned char i;
for( i = 0; i < 8; i )
{
if( d & 0x01 )
{
IO = 1;
}
else
{
IO = 0;
}
d = d >> 1;
SCLK = 1;
SCLK = 0;
}
}
//************************************************************
void writeDS1302(unsigned char wAd,unsigned char dat)
{
RST = 0;
SCLK = 0;
IO = 0;
RST = 1;
writeRTCdata(wAd);
writeRTCdata(dat);
SCLK = 1;
RST = 0;
}
//************************************************************
void ProtectCode(int b)//0 禁止寫入 1 致能寫入
{
if( b )
{
writeDS1302(0x8e,0x00);
}
else
{
writeDS1302(0x8e,0x80);
}
}
//************************************************************
unsigned char ReadRTCdata(void)
{
P0DIR = 0x0A;
unsigned char i,Ti=0;
for( i = 0; i < 8; i )
{
if( IO )
{
Ti = Ti |0x80;
}
Ti = Ti >> 1;
SCLK = 0;
SCLK = 1;
}
return ( Ti );
}
//************************************************************
unsigned char ReadDS1302(unsigned char rAd)
{
unsigned char T;
RST = 0;
SCLK = 0;
IO = 1;
RST = 1;
writeRTCdata(rAd);
T = ReadRTCdata();
SCLK = 1;
RST = 0;
return T;
}
//************************************************************
void SetDS1302(void)
{
RST = 0;
SCLK = 0;
ProtectCode(1);
writeDS1302(0x80,0x55);
writeDS1302(0x82,0x58);
writeDS1302(0x84,0x23);
writeDS1302(0x86,0x30);
writeDS1302(0x88,0x09);
writeDS1302(0x8a,0x03);
writeDS1302(0x8c,0x09);
ProtectCode(0);
}
[/code]

通常寫韌體是需要搭配示波器來觀察訊號的,你可以看一下訊號timing是否OK