硬件基础期末大作业-计步器

#include "eeprom.h" #include "timing.h" const unsigned char s_byte = sizeof(t_byte); //初始化EEPROM设置引脚 void EE_Init() { PeSEL &= ~(eeSCK + eeSI + eeCS + eeSO); PeSEL2 &= ~(eeSCK + eeSI + eeCS + eeSO); PeDIR |= eeSCK + eeSI + eeCS; PeDIR &= ~eeSO; } //刷时钟信号一次 void send_SCK() { PeOUT &= ~eeSCK; // SCK=0 PeOUT |= eeSCK; // SCK=1 PeOUT &= ~eeSCK; // SCK=0 } //写字节 void send_SI_byte(unsigned int a) { t_byte i,b; for(i=0;i<8;++i) { b=a<<i; switch(b&0x80){ case 0x80: PeOUT=PeOUT|eeSI; break; // a中第(8-i)位为1，置SI=1. case 0: PeOUT=PeOUT&(~eeSI); break; // a中第(8-i)位为0，置SI=0. default:; } send_SCK(); // 通过SCK输出一个clock } } //读字节 t_byte read_SO_byte() { t_byte i,a=0; for(i=0;i<8;++i) { a=a<<1; // 将a左移一位 if((PeIN&eeSO)==0) a=a&254; // 置a末位为0 else a=a|1; // 置a末位为1 send_SCK(); // 通过SCK输出一个clock } return a; } //读EEPROM状态 t_byte ReadStatus() { t_byte a; PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_RDSR); // 发送读状态命令 a=read_SO_byte(); // 读取状态值 PeOUT=PeOUT|eeCS; // CS=1 return a; } //等待直到无写操作进行 void CheckWIP() { t_byte k; while(1){ k=ReadStatus();; if((k&WIP)==0) break; // 当WIP位为0（不忙时）跳出无限循环 } } //允许写操作 void WriteEnable() { PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_WREN); // 写入写允许命令 PeOUT=PeOUT|eeCS; // CS=1 } //禁止写操作 void WriteDisable() { PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_WRDI); // 写入写禁止命令 PeOUT=PeOUT|eeCS; // CS=1 } //读取指定地址内容 t_byte EE_ReadByte(t_byte address) { t_byte a; CheckWIP(); // 查询状态 PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_READ); // 发送读命令 send_SI_byte(address); // 发送读单元地址 a=read_SO_byte(); // 读取指定单元的内容 PeOUT=PeOUT|eeCS; // CS=1 return a; } //向指定地址写入数据 void EE_WriteByte(t_byte address,t_byte data) { CheckWIP(); // 查询状态 WriteEnable(); // 设置写允许 PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_WRITE); // 发送写命令 send_SI_byte(address); // 发送写单元地址 send_SI_byte(data); // 发送写入单元的内容 PeOUT=PeOUT|eeCS; // CS=1 } //从指定地址开始写入数据数组 void EE_WriteArray(t_byte address,unsigned char* data,t_byte length) { t_byte i=0; for(;i<length;i++) EE_WriteByte(address+i, *(data+i*s_byte)); } //从指定地址开始读取数组并存储到data中 void EE_ReadArray(t_byte address,unsigned char* data,t_byte length) { t_byte i=0; for(;i<length;i++) *(data+i*s_byte) = EE_ReadByte(address+i); } //写入状态 void WriteStatus(t_byte data) { CheckWIP(); // 查询状态 WriteEnable(); // 设置写允许 PeOUT=PeOUT&(~eeCS); // CS=0 send_SI_byte(c_WRSR); // 写状态寄存器命令 send_SI_byte(data); // 发送要写入的内容 PeOUT=PeOUT|eeCS; // CS=1 } //保存运行时间、计步器值、秒表值、校验字符 void SaveData() { EE_WriteByte(0x80, STdsec); EE_WriteByte(0x90, STsec); EE_WriteByte(0x20, sec); EE_WriteByte(0x21, min); EE_WriteByte(0x22, hour); EE_WriteByte(0x30, (steps&0xFF000000)>> 24); EE_WriteByte(0x31, (steps&0x00FF0000)>> 16); EE_WriteByte(0x32, (steps&0x0000FF00)>> 8); EE_WriteByte(0x33, (steps&0x000000FF)); EE_WriteByte(0x10, MTimeSuspFLG); EE_WriteByte(0x11, STimeSuspFLG); EE_WriteArray(0xA0, CheckContent,CheckLength); } //读取上述数据,校验成功返回0,校验出错返回1 t_byte ReadData() { t_byte checkd[CheckLength]; t_byte checkt[CheckLength] = CheckContent; EE_ReadArray(0xA0, checkd, CheckLength); t_byte j=0; for(;j<CheckLength;j++) if(checkd[j]-checkt[j]) return 1; STdsec = EE_ReadByte(0x80); STsec = EE_ReadByte(0x90); sec = EE_ReadByte(0x20); min = EE_ReadByte(0x21); hour = EE_ReadByte(0x22); steps = (unsigned long)EE_ReadByte(0x30) << 24; steps += (unsigned long)EE_ReadByte(0x31) << 16; steps += (unsigned long)EE_ReadByte(0x32) << 8; steps += (unsigned long)EE_ReadByte(0x33); MTimeSuspFLG = EE_ReadByte(0x10); STimeSuspFLG = EE_ReadByte(0x11); return 0; }