bsp_IIC.cpp

浏览该文件的文档.

/*----------------------------------------------------------------------------------------------------
 #
 #  Copyright (c) 2022 Yuankang Liang(XerolySkinner)
 #
 #  本软件按原样提供,无任何明示或暗示
 #  在任何情况下,作者都不承担任何损害赔偿责任
 #
 #  使用的许可声明:
 #  1.  不得歪曲本软件的来源,你不能声称你编写了原始软件.
 #  2.  免费授予以任何目的,前提是版权声明出现在所有副本中.
 #      并且版权声明和许可声明同时出现.
 #  3.  你有使用,复制,修改,分发,和销售本软件的许可.
 #  4.  如果你在产品中使用,产品文档中的声明是赞赏的但不是必须的.
 #  5.  本通知不得从任何来源删除或更改.
 #
 #  Yuankang Liang(XerolySkinner)
 #      E-mail:zabbcccbbaz@163.com
 #      QQ:2715099320
 #      Mobile Phone:13005636215
 #
 #  All rights reserved.
 */
 
//----------------------------------------------------------------------------------------------------
//  头文件
#include "bsp_IIC.h"
//----------------------------------------------------------------------------------------------------
//  底层程序
//  
void bsp_IIC::IIC_Start(void) {
    IIC_SDA(IIC_SET);
    IIC_SDA(IIC_SET);
    IIC_SCK(IIC_SET);
    IIC_Delay();
    IIC_SDA(IIC_RESET);
    IIC_Delay();
    IIC_SCK(IIC_RESET);}
//----------------------------------------------------------------------------------------------------
void bsp_IIC::IIC_Stop(void) {
    IIC_SDA(IIC_RESET);
    IIC_SCK(IIC_SET);
    IIC_Delay();
    IIC_SDA(IIC_SET);
    IIC_Delay();}
//----------------------------------------------------------------------------------------------------
//发送应答或非应答信号
void bsp_IIC::IIC_SendAck(u8 ackbit) {
    IIC_SCK(IIC_RESET);
    IIC_SDA(ackbit);
    IIC_Delay();
    IIC_SCK(IIC_SET);
    IIC_Delay();
    IIC_SCK(IIC_RESET);
    IIC_SDA(IIC_SET);
    IIC_Delay();}
//----------------------------------------------------------------------------------------------------
u8 bsp_IIC::IIC_WaitAck(void) {
    u8 ackbit;
    IIC_SCK(IIC_SET);
    IIC_Delay();
    ackbit = IIC_SDA(IIC_READ);
    IIC_SCK(IIC_RESET);
    IIC_Delay();
    return ackbit;}
//----------------------------------------------------------------------------------------------------
void bsp_IIC::IIC_SendByte(u8 byt) {
    u8 i;
    for (i = 0; i < 8; i++) {
        IIC_SCK(IIC_RESET);
        IIC_Delay();
        IIC_SDA((byt & 0x80) != 0);
        IIC_Delay();
        IIC_SCK(IIC_SET);
        byt <<= 1;
        IIC_Delay();}
    IIC_SCK(IIC_RESET);}
//----------------------------------------------------------------------------------------------------
u8 bsp_IIC::IIC_RecByte(void) {
    u8 i=0, da=0;
    for (i = 0; i < 8; i++) {
        IIC_SCK(IIC_SET);
        IIC_Delay();
        da <<= 1;
        if (IIC_SDA(IIC_READ))da |= 1;
        IIC_SCK(IIC_RESET);
        IIC_Delay();}
    return da;}
//----------------------------------------------------------------------------------------------------
//  封装程序
//  
void bsp_IIC::IIC_WriteOneByte(u8 id, u8 addr, u8 dat) {
    IIC_Start();
    IIC_SendByte(id << 1);
    IIC_WaitAck();
    IIC_SendByte(addr);
    IIC_WaitAck();
    IIC_SendByte(dat);
    IIC_WaitAck();
    IIC_Stop();}
//----------------------------------------------------------------------------------------------------
u8 bsp_IIC::IIC_ReadOneByte(u8 id, u8 addr) {
    u8 temp = 0;
    IIC_Start();
    IIC_SendByte(id << 1);
    IIC_WaitAck();
    IIC_SendByte(addr);
    IIC_SendAck(0);
    IIC_Start();
    IIC_SendByte((id << 1) | 0x01);
    IIC_SendAck(0);
    temp = IIC_RecByte();
    IIC_SendAck(1);
    IIC_Stop();
    return temp;}
//----------------------------------------------------------------------------------------------------
void bsp_IIC::IIC_Write(u8 id,u8 addr,u8* dat,u32 len){
    IIC_Start();
    IIC_SendByte(id<<1);
    IIC_WaitAck();
    IIC_SendByte(addr);
    IIC_WaitAck();
    for(int i=0;i<len;i++){
        IIC_SendByte(dat[i]);
        IIC_WaitAck();}
    IIC_Stop();
    return;}
//----------------------------------------------------------------------------------------------------
void bsp_IIC::IIC_Read(u8 id,u8 addr,u8* dat,u32 len){
    IIC_Start();
    IIC_SendByte(id<<1);
    IIC_WaitAck();
    IIC_SendByte(addr);
    IIC_SendAck(0);
    IIC_Start();
    IIC_SendByte((id<<1)|0x01);
    IIC_SendAck(0);
    for(int i=0;i<len;i++){
        dat[i]=IIC_RecByte();
        IIC_SendAck(i==(len-1));}
    IIC_Stop();
    return;}