1843.DS1302讀寫一體化C51源程序

1、ds1302讀寫一體化c51源程序/* ds1302讀寫一體化c51源程序 */打開ds1302void timespiopen(void)timeclk = 0;timerst = 0;/禁止ds1302timeio = 1;/釋放數(shù)據(jù)總線timerst = 1;/使能ds1302/關(guān)閉ds1302void timespiclose(void)timerst = 0;/禁止ds1302timeio = 1;/釋放數(shù)據(jù)總線timeclk = 1;/讀寫ds1302unsigned char timespireadwrite(unsigned char val)unsigned char i;a

2、cc = val;/取8位數(shù)據(jù)for (i = 8;i 0; i-)timeclk = 0;/時(shí)鐘下降沿輸入數(shù)據(jù)(ds1302讀)_nop_();/延時(shí)cy = timeio;/接收串行數(shù)據(jù)到cy_rrca_();/右移一位數(shù)據(jù)到cy(先存后取)timeio = cy;/發(fā)送串行數(shù)據(jù)timeclk = 1;/時(shí)鐘上升沿打入數(shù)據(jù)(ds1302寫)timeio = 1;/釋放數(shù)據(jù)總線val = acc;return val;/讀ds1302字節(jié)unsigned char timebyteread(unsigned char address)timespiopen();/打開ds1302timesp

3、ireadwrite(address);/寫入ds1302命令address = timespireadwrite(0xff);/讀入ds1302數(shù)據(jù)timespiclose();/關(guān)閉ds1302return address;/返回?cái)?shù)據(jù)/讀ds1302ram字節(jié)unsigned char timerambyteread(unsigned char address)timespiopen();/打開ds1302timespireadwrite(address 1) 0xc1);/寫入ds1302命令address = timespireadwrite(0xff);/讀入ds1302數(shù)據(jù)time

4、spiclose();/關(guān)閉ds1302return address;/返回?cái)?shù)據(jù)/寫ds1302字節(jié)void timebytewrite(unsigned char address, unsigned char val)timespiopen();/打開ds1302timespireadwrite(address);/寫地址timespireadwrite(val);/寫數(shù)據(jù)timespiclose();/關(guān)閉ds1302/寫ds1302字節(jié)void timerambytewrite(unsigned char address, unsigned char val)timespiopen();

5、/打開ds1302timespireadwrite(address 1) 0xc0);/寫地址timespireadwrite(val);/寫數(shù)據(jù)timespiclose();/關(guān)閉ds1302/使能ds1302寫保護(hù)void timewriteenable(void)timebytewrite(timewriteregall, timewriteseg);/使能ds1302寫保護(hù)/開放ds1302寫保護(hù)void timewriedisbale(void)timebytewrite(timewriteregall, 0);/開放ds1302寫保護(hù)/ds1302工作開始void timeworkstart(void)unsigned char val;val = timebyteread(timereadseg);/讀秒數(shù)據(jù)val &= 0x7f;/打開晶振timewriedisbale();/開放ds1302寫保護(hù)timebytewrite(timewritese