蓝桥杯——第九届蓝省赛_彩灯控制器
一、使用到的模块
使用到的模块
数码管、按键、LED、AD、eeprom
二、代码部分
实验平台：CT107D
实验芯片：stc15f2k60s2
实验现象：完成题目要求
代码如下
iic.c
#include "iic.h"
void Delay5us() //@12.000MHz
{
unsigned char i;
_nop_();
_nop_();
i = 12;
while (--i);
}
//总线启动条件
void IIC_Start(void)
{
SDA = 1;
SCL = 1;
somenop;
SDA = 0;
somenop;
SCL = 0;
}
//总线停止条件
void IIC_Stop(void)
{
SDA = 0;
SCL = 1;
somenop;
SDA = 1;
}
//应答位控制
void IIC_Ack(unsigned char ackbit)
{
if(ackbit)
{
SDA = 0;
}
else
{
SDA = 1;
}
somenop;
SCL = 1;
somenop;
SCL = 0;
SDA = 1;
somenop;
}
//等待应答
bit IIC_WaitAck(void)
{
SDA = 1;
somenop;
SCL = 1;
somenop;
if(SDA)
{
SCL = 0;
IIC_Stop();
return 0;
}
else
{
SCL = 0;
return 1;
}
}
//通过I2C总线发送数据
void IIC_SendByte(unsigned char byt)
{
unsigned char i;
for(i=0;i<8;i++)
{
if(byt&0x80)
{
SDA = 1;
}
else
{
SDA = 0;
}
somenop;
SCL = 1;
byt <<= 1;
somenop;
SCL = 0;
}
}
//从I2C总线上接收数据
unsigned char IIC_RecByte(void)
{
unsigned char da;
unsigned char i;
for(i=0;i<8;i++)
{
SCL = 1;
somenop;
da <<= 1;
if(SDA)
da |= 0x01;
SCL = 0;
somenop;
}
return da;
}
void init_adc(unsigned char add)
{
IIC_Start();
IIC_SendByte(0x90);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_Stop();
}
unsigned char read_adc(unsigned char add)
{
unsigned char temp;
EA = 0;
IIC_Start();
IIC_SendByte(0x90);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_Start();
IIC_SendByte(0x91);
IIC_WaitAck();
temp = IIC_RecByte();
IIC_WaitAck();
IIC_Stop();
EA = 1;
return temp;
}
void write_24c02(unsigned char add,unsigned char date1)
{
IIC_Start();
IIC_SendByte(0xa0);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_SendByte(date1);
IIC_WaitAck();
IIC_Stop();
}
unsigned char read_24c02(unsigned char add)
{
unsigned char temp;
EA = 0;
IIC_Start();
IIC_SendByte(0xa0);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_Start();
IIC_SendByte(0xa1);
IIC_WaitAck();
temp = IIC_RecByte();
IIC_WaitAck();
IIC_Stop();
EA = 1;
return temp;
}
iic.h
#ifndef _IIC_H
#define _IIC_H
#include "stc15f2k60s2.h"
#include "intrins.h"
#define somenop Delay5us() ;
#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1
//总线引脚定义
sbit SDA = P2^1; /* 数据线 */
sbit SCL = P2^0; /* 时钟线 */
//函数声明
void IIC_Start(void);
void IIC_Stop(void);
void IIC_Ack(unsigned char ackbit);
void IIC_SendByte(unsigned char byt);
bit IIC_WaitAck(void);
unsigned char IIC_RecByte(void);
void init_adc(unsigned char add);
unsigned char read_adc(unsigned char add);
void write_24c02(unsigned char add,unsigned char date1);
unsigned char read_24c02(unsigned char add);
#endif
main.c
#include