多功能电子时钟设计 - 图文(6)

电子系统设计报告

void DS1302InputByte(unsigned char d) //实时时钟写入一字节(内部函数) {

unsigned char i; ACC = d;

for(i=8; i>0; i--) {

DS1302_IO = ACC0; //相当于汇编中的 RRC DS1302_CLK = 1; DS1302_CLK = 0; ACC = ACC >> 1; } }

unsigned char DS1302OutputByte(void) //实时时钟读取一字节(内部函数) {

unsigned char i; for(i=8; i>0; i--) {

ACC = ACC >>1; //相当于汇编中的 RRC ACC7 = DS1302_IO; DS1302_CLK = 1; DS1302_CLK = 0; }

return(ACC); }

void Write1302(unsigned char ucAddr, unsigned char ucDa) //ucAddr: DS1302地址, ucData: 要写的数据 {

DS1302_RST = 0; DS1302_CLK = 0; DS1302_RST = 1;

DS1302InputByte(ucAddr); // 地址，命令 DS1302InputByte(ucDa); // 写1Byte数据 DS1302_CLK = 1; DS1302_RST = 0; }

unsigned char Read1302(unsigned char ucAddr) //读取DS1302某地址的数据 {

unsigned char ucData; DS1302_RST = 0; DS1302_CLK = 0;

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电子系统设计报告

DS1302_RST = 1;

DS1302InputByte(ucAddr|0x01); // 地址，命令 ucData = DS1302OutputByte(); // 读1Byte数据 DS1302_CLK = 1; DS1302_RST = 0; return(ucData); }

void DS1302_GetTime(SYSTEMTIME *Time) //获取时钟芯片的时钟数据到自定义的结构型数组 { unsigned char ReadValue; ReadValue = Read1302(DS1302_SECOND); Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); //十六进制转换成十进制(x/16)*10+个位 ReadValue = Read1302(DS1302_MINUTE); Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_HOUR); Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_DAY); Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_MONTH); Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_YEAR); Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); }

void DateToStr(SYSTEMTIME *Time) //将时间年,月,日,星期数据转换成液晶显示字符串,放到数组里DateString[]

{ if(hide_year<2) //这里的if,else语句都是判断位闪烁,<2显示数据,>2就不显示,输出字符串为 2011/01/10 { Time->DateString[0] = '2'; Time->DateString[1] = '0'; Time->DateString[2] = Time->Year/10 + '0'; Time->DateString[3] = Time->Year + '0'; } else { Time->DateString[0] = ' '; Time->DateString[1] = ' ';

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Time->DateString[10] = '\\0'; //字符串末尾加 '\\0' ,判断结束字符 }

void TimeToStr(SYSTEMTIME *Time) //将时,分,秒数据转换成液晶显示字符放到数组 TimeString[];

{ if(hide_hour<2) { Time->TimeString[0] = Time->Hour/10 + '0'; Time->TimeString[1] = Time->Hour + '0'; } else { Time->TimeString[0] = ' '; Time->TimeString[1] = ' '; } Time->TimeString[2] = ':'; if(hide_min<2)

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电子系统设计报告

Time->DateString[2] = ' '; Time->DateString[3] = ' '; }

Time->DateString[4] = '-'; if(hide_month<2) {

Time->DateString[5] = Time->Month/10 + '0'; Time->DateString[6] = Time->Month + '0'; }

else {

Time->DateString[5] = ' '; Time->DateString[6] = ' '; }

Time->DateString[7] = '-'; if(hide_day<2) {

Time->DateString[8]=Time->Day/10 + '0'; Time->DateString[9]=Time->Day + '0'; }

else {

Time->DateString[8] = ' ';

Time->DateString[9] = ' '; }

电子系统设计报告

{ Time->TimeString[3] = Time->Minute/10 + '0'; Time->TimeString[4] = Time->Minute + '0'; } else { Time->TimeString[3] = ' '; Time->TimeString[4] = ' '; } Time->TimeString[5] = ':'; if(hide_sec<2) { Time->TimeString[6] = Time->Second/10 + '0'; Time->TimeString[7] = Time->Second + '0'; }

else {

Time->TimeString[6] = ' '; Time->TimeString[7] = ' '; } Time->DateString[8] = '\\0'; }

void Initial_DS1302(void) //时钟芯片初始化 { unsigned char Second=Read1302(DS1302_SECOND); if(Second&0x80) //判断时钟芯片是否关闭 { Write1302(0x8e,0x00); //写入允许 Write1302(0x8c,0x0b); Write1302(0x88,0x0b); Write1302(0x86,0x22); Write1302(0x84,0x14); Write1302(0x82,0x57); Write1302(0x80,0x40); Write1302(0x8e,0x80); //禁止写入 } }

//*******************************ROM操作*************************************************

void WriteRAM(unsigned char address,unsigned char *dat,unsigned char n)//写RAM函数 {

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电子系统设计报告

unsigned char i;

unsigned char addr=0xc0|(address<<1); for(i=0;i

Write1302(addr,*dat++); addr+=2; } }

void ReadRAM(unsigned char address,unsigned char *dat,unsigned char n)//读RAM函数 {

unsigned char i;

unsigned char addr=0xc1|(address<<1); for(i=0;i

*dat++=Read1302(addr); addr+=2; } }

#endif

4.2.4 延时程序 #ifndef _delay_H_ #define _delay_H_

void delay(uint x) //延时-us {

while(--x); }

void delayms(uint xms) //延时-ms {

uint i,j;

for(i=xms;i>0;i--)

for(j=125;j>0;j--); }

#endif

第5章 测试结果

在本次课程设计过程中，虽然非常顺利地完成了软件和硬件的设计和仿真，并最终实现了题目所要求实现的功能。但还有可深入研究和可改进之处。在调试过程中，最让人头痛的是DS1302的驱动，除了注意时序以外，引脚的连接和抗干扰很重要，特别是

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