不要黑 發表于 2020-7-1 21:19
看看顯示函數后面有沒有，或者把程序貼一下 - #include <STC12C5A60S2.H>
- #include "intrins.h"
- sbit DS1302_CE = P0^0;
- sbit DS1302_CK = P0^1;
- sbit DS1302_IO = P0^2;
- bit flag200ms = 0; //200ms定時標志
- unsigned char T0RH = 0; //T0重載值的高字節
- unsigned char T0RL = 0; //T0重載值的低字節
- void ConfigTimer0(unsigned int ms);
- void InitDS1302();
- unsigned char DS1302SingleRead(unsigned char reg);
- extern void InitLcd1602();
- extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
- void main()
- {
- unsigned char i;
- unsigned char psec=0xAA; //秒備份，初值AA確保首次讀取時間后會刷新顯示
- unsigned char time[8]; //當前時間數組
- unsigned char str[12]; //字符串轉換緩沖區
- EA = 1; //開總中斷
- ConfigTimer0(1); //T0定時1ms
- InitDS1302(); //初始化實時時鐘
- InitLcd1602(); //初始化液晶
-
- while (1)
- {
- if (flag200ms) //每200ms讀取依次時間
- {
- flag200ms = 0;
- for (i=0; i<7; i++) //讀取DS1302當前時間
- {
- time[i] = DS1302SingleRead(i);
- }
- if (psec != time[0]) //檢測到時間有變化時刷新顯示
- {
- str[0] = '2'; //添加年份的高2位：20
- str[1] = '0';
- str[2] = (time[6] >> 4) + '0'; //“年”高位數字轉換為ASCII碼
- str[3] = (time[6]&0x0F) + '0'; //“年”低位數字轉換為ASCII碼
- str[4] = '-'; //添加日期分隔符
- str[5] = (time[4] >> 4) + '0'; //“月”
- str[6] = (time[4]&0x0F) + '0';
- str[7] = '-';
- str[8] = (time[3] >> 4) + '0'; //“日”
- str[9] = (time[3]&0x0F) + '0';
- str[10] = '\0';
- LcdShowStr(0, 0, str); //顯示到液晶的第一行
-
- str[0] = (time[5]&0x0F) + '0'; //“星期”
- str[1] = '\0';
- LcdShowStr(11, 0, "week");
- LcdShowStr(15, 0, str); //顯示到液晶的第一行
-
- str[0] = (time[2] >> 4) + '0'; //“時”
- str[1] = (time[2]&0x0F) + '0';
- str[2] = ':'; //添加時間分隔符
- str[3] = (time[1] >> 4) + '0'; //“分”
- str[4] = (time[1]&0x0F) + '0';
- str[5] = ':';
- str[6] = (time[0] >> 4) + '0'; //“秒”
- str[7] = (time[0]&0x0F) + '0';
- str[8] = '\0';
- LcdShowStr(4, 1, str); //顯示到液晶的第二行
-
- psec = time[0]; //用當前值更新上次秒數
- }
- }
- }
- }
- void BusDelay()
- {
- _nop_();
- _nop_();
- _nop_();
- _nop_();
-
- }
- /* 發送一個字節到DS1302通信總線上 */
- void DS1302ByteWrite(unsigned char dat)
- {
- unsigned char mask;
-
- for (mask=0x01; mask!=0; mask<<=1) //低位在前，逐位移出
- {
- if ((mask&dat) != 0) //首先輸出該位數據
- DS1302_IO = 1;
- else
- DS1302_IO = 0;
- DS1302_CK = 1; //然后拉高時鐘
- BusDelay();
- DS1302_CK = 0; //再拉低時鐘，完成一個位的操作
- }
- DS1302_IO = 1; //最后確保釋放IO引腳
- }
- /* 由DS1302通信總線上讀取一個字節 */
- unsigned char DS1302ByteRead()
- {
- unsigned char mask;
- unsigned char dat = 0;
- for (mask=0x01; mask!=0; mask<<=1) //低位在前，逐位讀取
- {
- if (DS1302_IO != 0) //首先讀取此時的IO引腳，并設置dat中的對應位
- {
- dat |= mask;
- }
- DS1302_CK = 1; //然后拉高時
- BusDelay();
- DS1302_CK = 0; //再拉低時鐘，完成一個位的操作
- }
- return dat; //最后返回讀到的字節數據
- }
- /* 用單次寫操作向某一寄存器寫入一個字節，reg-寄存器地址，dat-待寫入字節 */
- void DS1302SingleWrite(unsigned char reg, unsigned char dat)
- {
- DS1302_CE = 1; //使能片選信號
- DS1302ByteWrite((reg<<1)|0x80); //發送寫寄存器指令
- DS1302ByteWrite(dat); //寫入字節數據
- DS1302_CE = 0; //除能片選信號
- }
- /* 用單次讀操作從某一寄存器讀取一個字節，reg-寄存器地址，返回值-讀到的字節 */
- unsigned char DS1302SingleRead(unsigned char reg)
- {
- unsigned char dat;
-
- DS1302_CE = 1; //使能片選信號
- DS1302ByteWrite((reg<<1)|0x81); //發送讀寄存器指令
- dat = DS1302ByteRead(); //讀取字節數據
- DS1302_CE = 0; //除能片選信號
-
- return dat;
- }
- /* DS1302初始化，如發生掉電則重新設置初始時間 */
- void InitDS1302()
- {
- unsigned char i;
- unsigned char code InitTime[] = {
- 0x70,0x30,0x07, 0x30, 0x05, 0x06, 0x21
- };
-
- DS1302_CE = 0; //初始化DS1302通信引腳
- DS1302_CK = 0;
- i = DS1302SingleRead(0); //讀取秒寄存器
- if ((i & 0x80) != 0) //由秒寄存器最高位CH的值判斷DS1302是否已停止
- {
- DS1302SingleWrite(7, 0x00); //撤銷寫保護以允許寫入數據
- for (i=0; i<7; i++) //設置DS1302為默認的初始時間
- {
- DS1302SingleWrite(i, InitTime[i]);
- }
- }
- }
- /* 配置并啟動T0，ms-T0定時時間 */
- void ConfigTimer0(unsigned int ms)
- {
- unsigned long tmp; //臨時變量
- AUXR=0x80; //不分頻
- tmp = 33177600; //定時器計數頻率
- tmp = (tmp * ms) / 1000; //計算所需的計數值
- tmp = 65536 - tmp; //計算定時器重載值
- tmp = tmp + 28; //補償中斷響應延時造成的誤差
- T0RH = (unsigned char)(tmp>>8); //定時器重載值拆分為高低字節
- T0RL = (unsigned char)tmp;
- TMOD &= 0xF0; //清零T0的控制位
- TMOD |= 0x01; //配置T0為模式1
- TH0 = T0RH; //加載T0重載值
- TL0 = T0RL;
- ET0 = 1; //使能T0中斷
- TR0 = 1; //啟動T0
- }
- /* T0中斷服務函數，執行200ms定時 */
- void InterruptTimer0() interrupt 1
- {
- static unsigned int tmr200ms = 0;
-
- TH0 = T0RH; //重新加載重載值
- TL0 = T0RL;
- tmr200ms++;
- if (tmr200ms >= 200) //定時200ms
- {
- tmr200ms = 0;
- flag200ms = 1;
- }
- }
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