蓝桥杯省赛常用基本模块（模块化编程）

#include <STC15F2K60S2.H> #include "intrins.h" #include "sys.h" /* # I2C代码片段说明 1. 本文件夹中提供的驱动代码供参赛选手完成程序设计参考。 2. 参赛选手可以自行编写相关代码或以该代码为基础，根据所选单片机类型、运行速度和试题 中对单片机时钟频率的要求，进行代码调试和修改。 */ sbit scl = P2^0; sbit sda = P2^1; #define DELAY_TIME 5 // static void I2C_Delay(unsigned char n) { do { _nop_();_nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();_nop_(); } while(n--); } // void I2CStart(void) { sda = 1; scl = 1; I2C_Delay(DELAY_TIME); sda = 0; I2C_Delay(DELAY_TIME); scl = 0; } // void I2CStop(void) { sda = 0; scl = 1; I2C_Delay(DELAY_TIME); sda = 1; I2C_Delay(DELAY_TIME); } // void I2CSendByte(unsigned char byt) { unsigned char i; for(i=0; i<8; i++){ scl = 0; I2C_Delay(DELAY_TIME); if(byt & 0x80){ sda = 1; } else{ sda = 0; } I2C_Delay(DELAY_TIME); scl = 1; byt <<= 1; I2C_Delay(DELAY_TIME); } scl = 0; } // unsigned char I2CReceiveByte(void) { unsigned char da; unsigned char i; for(i=0;i<8;i++){ scl = 1; I2C_Delay(DELAY_TIME); da <<= 1; if(sda) da |= 0x01; scl = 0; I2C_Delay(DELAY_TIME); } return da; } // unsigned char I2CWaitAck(void) { unsigned char ackbit; scl = 1; I2C_Delay(DELAY_TIME); ackbit = sda; scl = 0; I2C_Delay(DELAY_TIME); return ackbit; } // void I2CSendAck(unsigned char ackbit) { scl = 0; sda = ackbit; I2C_Delay(DELAY_TIME); scl = 1; I2C_Delay(DELAY_TIME); scl = 0; sda = 1; I2C_Delay(DELAY_TIME); } //unsigned char Read_AIN1() //{ // unsigned int dat; // // I2CStart(); // I2CSendByte(0x91); // I2CWaitAck(); // dat = I2CReceiveByte(); // I2CSendAck(1); // I2CStop(); // // return dat; //} //void AIN1_Init() //{ // I2CStart(); // I2CSendByte(0x90); // I2CWaitAck(); // I2CSendByte(0x01); // I2CWaitAck(); // I2CStop(); // // I2C_Delay(DELAY_TIME); //} //unsigned char Read_AIN3() //{ // unsigned int dat; // // I2CStart(); // I2CSendByte(0x91); // I2CWaitAck(); // dat = I2CReceiveByte(); // I2CSendAck(1); // I2CStop(); // // return dat; //} //void AIN3_Init() //{ // I2CStart(); // I2CSendByte(0x90); // I2CWaitAck(); // I2CSendByte(0x03); // I2CWaitAck(); // I2CStop(); // // I2C_Delay(DELAY_TIME); //} void Write_24C02(uch addr,uch dat) { I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(addr); I2CWaitAck(); I2CSendByte(dat); I2CWaitAck(); I2CStop(); I2C_Delay(DELAY_TIME); } uch Read_24C02(uch addr) { unsigned int dat; I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(addr); I2CWaitAck(); I2CStart(); I2CSendByte(0xa1); I2CWaitAck(); dat = I2CReceiveByte(); I2CSendAck(1); I2CStop(); I2C_Delay(DELAY_TIME); return dat; }