305 lines
7.5 KiB
C
305 lines
7.5 KiB
C
#include "MAIN.H"
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#include <stdio.h>
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#include "RTC.H"
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#include <string.h>
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//unsigned char bySta = 0;
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void SDAOut(bit c)
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{
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P0_DIR = P0_DIR | 0x08;//修改P0.3为输出
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P0_3 = c;
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}
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void SCLOut(bit c)
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{
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P0_2 = c;
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}
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void iic_start(void)
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{
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SDAOut(1);
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_nop_();
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SCLOut(1);
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somenop;
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SDAOut(0);
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somenop;
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SCLOut(0);
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}
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void iic_stop(void)
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{
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SDAOut(0);
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_nop_();
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SCLOut(1);
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somenop;
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SDAOut(1);
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}
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void iic_ack(bit ackbit)
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{
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if(ackbit)
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SDAOut(0);
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else
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SDAOut(1);
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somenop;
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SCLOut(1);
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somenop;
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SCLOut(0);
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SDAOut(1);
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somenop;
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}
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bit iic_waitack(void)
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{
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SDAOut(1);
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somenop;
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SCLOut(1);
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P0_DIR = P0_DIR & 0xF7;//修改P4.3为输入
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somenop;
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if(P0_3)
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{
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SCLOut(0);
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iic_stop();
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return 0;
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}
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else
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{
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SCLOut(0);
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return 1;
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}
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}
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void iic_sendbyte(unsigned char byt)
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{
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unsigned char i;
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for(i=0;i<8;i++)
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{
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if(byt&0x80)
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SDAOut(1);
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else
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SDAOut(0);
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somenop;
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SCLOut(1);
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byt <<= 1;
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somenop;
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SCLOut(0);
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}
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}
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unsigned char iic_recbyte(void)
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{
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unsigned char da;
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unsigned char i;
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SFR_PAGE(_pp0, noSST); // switch to page 0
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P0_DIR = P0_DIR & 0xF7;//修改P4.3为输入
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for(i=0;i<8;i++)
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{
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SCLOut(1);
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somenop;
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da <<= 1;
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// P1_IOCR01 = 0x0020; // load port control register 1
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if(P0_3)
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da |= 0x01;
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SCLOut(0);
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somenop;
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}
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return da;
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}
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// 十进制转 BCD 码
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unsigned char DecToBcd(unsigned char dec)
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{
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return ((dec / 10) << 4) | (dec % 10);
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}
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// BCD 码转十进制
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unsigned char BcdToDec(unsigned char bcd)
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{
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return ((bcd >> 4) * 10) + (bcd & 0x0F);
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}
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// BM8563 写寄存器函数
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void BM8563_WriteReg(unsigned char reg, unsigned char rdata)
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{
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iic_start();
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iic_sendbyte(BM8563_ADDR); // 发送 BM8563 的 I2C 地址，写操作
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iic_waitack();
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iic_sendbyte(reg); // 发送寄存器地址
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iic_waitack();
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iic_sendbyte(rdata); // 发送数据
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iic_waitack();
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iic_stop();
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}
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// BM8563 读寄存器函数
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unsigned char BM8563_ReadReg(unsigned char reg)
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{
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unsigned char rdata;
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iic_start();
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iic_sendbyte(BM8563_ADDR); // 发送 BM8563 的 I2C 地址，写操作
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iic_waitack();
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iic_sendbyte(reg); // 发送寄存器地址
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iic_waitack();
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iic_start();
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iic_sendbyte(BM8563_ADDR | 0x01); // 发送 BM8563 的 I2C 地址，读操作
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iic_waitack();
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rdata = iic_recbyte();
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iic_ack(0);
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iic_stop();
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return rdata;
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}
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/**
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* @brief 检查报警标志AF是否置位（Bit3）
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* @retval true-报警已触发，false-无报警
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*/
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bool bm8563CheckAlarmFlag(void)
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{
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ubyte reg_val = BM8563_ReadReg(BM8563_CSR2);
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return (reg_val & BM8563_AF_BIT) != 0; // 检查Bit3,如果为0的话，那就
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}
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// 限制值在最小值和最大值之间
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ubyte constrain(ubyte value, ubyte min_val, ubyte max_val)
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{
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if (value < min_val)
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{
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return min_val;
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}
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else if (value > max_val)
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{
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return max_val;
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}
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else
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{
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return value;
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}
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}
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/**
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* @brief 设置BM8563当前时间（整合世纪位到月份寄存器）
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* @param pTime: 时间结构体指针（年份需为完整四位数，如1984、2024）
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* @retval 无
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*/
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void bm8563SetTime(UnTimeOutput *pTime)
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{
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ubyte reg_sec = 0;
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UnTimeOutput time_temp = {0};
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if (pTime == NULL) {
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return; // 错误处理可扩展
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}
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memcpy(&time_temp,pTime,sizeof(UnTimeOutput));//先拷贝
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time_temp.bit_data.year = constrain(time_temp.bit_data.year,0,99);//限制值范围
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time_temp.bit_data.month = constrain(time_temp.bit_data.month,1,12);//限制值范围
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time_temp.bit_data.day = constrain(time_temp.bit_data.day,1,31);//限制值范围
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time_temp.bit_data.hour = constrain(time_temp.bit_data.hour,0,23);//限制值范围
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time_temp.bit_data.week = constrain(time_temp.bit_data.week,0,6);//限制值范围
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time_temp.bit_data.minute = constrain(time_temp.bit_data.minute,0,59);//限制值范围
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time_temp.bit_data.second = constrain(time_temp.bit_data.second,0,59);//限制值范围
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BM8563_WriteReg( BM8563_YEAR, DecToBcd(pTime->bit_data.year) );//写年，还得转换为BCD码
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BM8563_WriteReg( BM8563_MONTH, DecToBcd(pTime->bit_data.month)&0x1F);//写月，还得转换为BCD码
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BM8563_WriteReg( BM8563_DAY, DecToBcd(pTime->bit_data.day)&0x3F);//写日，还得转换为BCD码
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BM8563_WriteReg( BM8563_HOUR, DecToBcd(pTime->bit_data.hour)&0x3F);//写小时，还得转换为BCD码
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BM8563_WriteReg( BM8563_WEEK, pTime->bit_data.week&0x07 );//写周，不需要转
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BM8563_WriteReg( BM8563_MIN, DecToBcd( pTime->bit_data.minute)&0x7F);//写分钟，还得转换为BCD码
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// 秒（地址0x02）：保留Bit7（CH时钟停止位）
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reg_sec = BM8563_ReadReg(BM8563_SEC) & 0x80;//
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BM8563_WriteReg(BM8563_SEC, reg_sec | (DecToBcd(pTime->bit_data.second) & 0x7F));//注意高位为掉电指示
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}
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/**
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* @brief 读取BM8563当前时间到联合体
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* @param pTime: UnTimeOutput联合体指针（用于存储读取到的时间数据）
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* @retval 无
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*/
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void bm8563GetTime(UnTimeOutput *pTime)
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{
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pTime->bit_data.year = BcdToDec(BM8563_ReadReg(BM8563_YEAR) );//先去除多余位，在转换10进制
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pTime->bit_data.month = BcdToDec(BM8563_ReadReg(BM8563_MONTH)&0x1F);
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pTime->bit_data.day = BcdToDec(BM8563_ReadReg(BM8563_DAY)&0x3F);
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pTime->bit_data.hour = BcdToDec(BM8563_ReadReg(BM8563_HOUR)&0x3F);
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pTime->bit_data.week = BM8563_ReadReg(BM8563_WEEK)&0x07;
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pTime->bit_data.minute = BcdToDec(BM8563_ReadReg(BM8563_MIN)&0x7F);
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pTime->bit_data.second = BcdToDec(BM8563_ReadReg(BM8563_SEC)&0x7F);
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}
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/**
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* @brief 设置BM8563闹钟（字段为0时禁用对应报警）
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* @param pTime: UnTimeOutput联合体指针，包含闹钟时间参数
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* @retval 无
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*/
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ubyte bm8563SetAlarm(UnTimeOutput *pTime)
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{
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UnTimeOutput current_time_temp = {0};
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UnTimeOutput output_time_temp = {0};
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ubyte carry_hour = 0;
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ubyte carry_day = 0;
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// 检查指针有效性
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if( (pTime == NULL) || ( (0 == pTime->bit_data.minute) && (0 == pTime->bit_data.hour) && (0 == pTime->bit_data.day) ) )//数据都为0或者指针都为0
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{
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// 可选：添加错误处理（如日志输出）
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return 1;
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}
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bm8563GetTime(¤t_time_temp);//先获取当前时间
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//计算分
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output_time_temp.bit_data.minute = current_time_temp.bit_data.minute + pTime->bit_data.minute;
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if( output_time_temp.bit_data.minute >= 60 )//超过需要进位
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{
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output_time_temp.bit_data.minute = output_time_temp.bit_data.minute - 60;
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carry_hour = 1;
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}
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//计算小时
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output_time_temp.bit_data.hour = current_time_temp.bit_data.hour + pTime->bit_data.hour + carry_hour;
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if( output_time_temp.bit_data.hour >= 24 )//超过需要进位
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{
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output_time_temp.bit_data.hour = output_time_temp.bit_data.hour - 24;
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carry_day = 1;
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}
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output_time_temp.bit_data.day = current_time_temp.bit_data.day + pTime->bit_data.day + carry_day;
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if( output_time_temp.bit_data.day >= 31 )//超过需要进位
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{
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output_time_temp.bit_data.day = 31;
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}
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output_time_temp.bit_data.week = 0;
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BM8563_WriteReg( BM8563_ALARM_DAY, DecToBcd(output_time_temp.bit_data.day)&0x3F);//写日，还得转换为BCD码
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BM8563_WriteReg( BM8563_ALARM_HOUR, DecToBcd(output_time_temp.bit_data.hour)&0x3F);//写小时，还得转换为BCD码
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BM8563_WriteReg( BM8563_ALARM_WEEK, 0x80 );//写周，会和日冲突，所以不需要闹钟
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BM8563_WriteReg( BM8563_ALARM_MIN, DecToBcd(output_time_temp.bit_data.minute)&0x7F);//写分钟，还得转换为BCD码
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// 秒（地址0x02）：保留Bit7（CH时钟停止位）
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// 使能闹钟中断（地址0x01，AIE=1，AF=0）
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BM8563_WriteReg(BM8563_CSR2, 0x02);
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return 0;
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}
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