OLED单色0.49寸6432_4线IIC.rar

/********************************************************************************** Copyright (C) 2016 SOL.lab <maxwellxyao@foxmail.com> *File name: simui2c.c *Description: 模拟I2C协议 *Author: MaxwellXyao *Versionc: V0.1.20170321 *History: [2016-6-26] 文件创建; [2017-3-19] 修复SimuI2C_WriteByte()中读取失败的bug; [2017-3-21] 修复SimuI2C_Init()中初始化失败的bug; **********************************************************************************/ #include "simui2c.h" //模拟I2C协议 //###########################【函数】########################### /***************************************************************** *Function: SimuI2C_Init *Description: 初始化模拟IIC协议 *Input: 模拟I2C结构体 *Output: 无 *Other: 无 *****************************************************************/ void SimuI2C_Init(SimuI2C *SimuI2C_Struct) { SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinOutInitSCL(); SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->PinSetSDA(1); } /***************************************************************** *Function: SimuI2C_Start *Description: 产生IIC起始信号 *Input: 模拟I2C结构体 *Output: 无 *Other: 无 *****************************************************************/ void SimuI2C_Start(SimuI2C *SimuI2C_Struct) //产生IIC起始信号 { SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinSetSDA(1); SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->Delayus(4); SimuI2C_Struct->PinSetSDA(0);//START:when CLK is high,DATA change form high to low SimuI2C_Struct->Delayus(4); SimuI2C_Struct->PinSetSCL(0);//钳住I2C总线，准备发送或接收数据 } /***************************************************************** *Function: SimuI2C_Stop *Description: 产生IIC停止信号 *Input: 模拟I2C结构体 *Output: 无 *Other: 无 *****************************************************************/ void SimuI2C_Stop(SimuI2C *SimuI2C_Struct) //产生IIC停止信号 { SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinSetSCL(0); SimuI2C_Struct->PinSetSDA(0);//STOP:when CLK is high DATA change form low to high SimuI2C_Struct->Delayus(4); SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->Delayus(4); SimuI2C_Struct->PinSetSDA(1);//发送I2C总线结束信号 } /***************************************************************** *Function: SimuI2C_WaitAck *Description: 等待应答信号到来 *Input: 模拟I2C结构体 *Output: 1，接收应答失败 0，接收应答成功 *Other: 无 *****************************************************************/ unsigned char SimuI2C_WaitAck(SimuI2C *SimuI2C_Struct) { unsigned char ucErrTime=0; SimuI2C_Struct->PinInInitSDA(); SimuI2C_Struct->PinSetSDA(1);SimuI2C_Struct->Delayus(1); SimuI2C_Struct->PinSetSCL(1);SimuI2C_Struct->Delayus(1); while(SimuI2C_Struct->PinGetSDA()) { ucErrTime++; if(ucErrTime>250) { SimuI2C_Stop(SimuI2C_Struct); return 1; } } SimuI2C_Struct->PinSetSCL(0);//时钟输出0 return 0; } /***************************************************************** *Function: SimuI2C_Ack *Description: 产生ACK应答 *Input: 模拟I2C结构体 *Output: 无 *Other: 无 *****************************************************************/ void SimuI2C_Ack(SimuI2C *SimuI2C_Struct) { SimuI2C_Struct->PinSetSCL(0); SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinSetSDA(0); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(0); } /***************************************************************** *Function: SimuI2C_NAck *Description: 不产生ACK应答 *Input: 模拟I2C结构体 *Output: 无 *Other: 无 *****************************************************************/ void SimuI2C_NAck(SimuI2C *SimuI2C_Struct) { SimuI2C_Struct->PinSetSCL(0); SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinSetSDA(1); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(0); } /***************************************************************** *Function: SimuI2C_WriteByte *Description: IIC发送一个字节 *Input: 模拟I2C结构体，发送的字节 *Output: 1，有应答 0，无应答 *Other: 无 *****************************************************************/ void SimuI2C_WriteByte(SimuI2C *SimuI2C_Struct,unsigned char data) { unsigned char t; SimuI2C_Struct->PinOutInitSDA(); SimuI2C_Struct->PinSetSCL(0);//拉低时钟开始数据传输 for(t=0;t<8;t++) { SimuI2C_Struct->PinSetSDA((data&0x80)>>7); data<<=1; SimuI2C_Struct->Delayus(2); //对TEA5767这三个延时都是必须的 SimuI2C_Struct->PinSetSCL(1); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(0); SimuI2C_Struct->Delayus(2); } } /***************************************************************** *Function: SimuI2C_ReadByte *Description: IIC读一个字节 *Input: 模拟I2C结构体，应答信号 *Output: 无 *Other: ack=1时，发送ACK，ack=0，发送nACK *****************************************************************/ unsigned char SimuI2C_ReadByte(SimuI2C *SimuI2C_Struct,unsigned char ack) { unsigned char i,receive=0; SimuI2C_Struct->PinInInitSDA(); for(i=0;i<8;i++ ) { SimuI2C_Struct->PinSetSCL(0); SimuI2C_Struct->Delayus(2); SimuI2C_Struct->PinSetSCL(1); receive<<=1; if(SimuI2C_Struct->PinGetSDA())receive++; SimuI2C_Struct->Delayus(1); } if (!ack) SimuI2C_NAck(SimuI2C_Struct);//发送nACK else SimuI2C_Ack(SimuI2C_Struct); //发送ACK return receive; }