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目前現(xiàn)有的max30205的驅(qū)動(dòng)代碼大多是基于Android單片機(jī)的,之前用了一個(gè)模塊,看了一下數(shù)據(jù)手冊(cè),通信用的是IIC通信,讀寫數(shù)據(jù)地址都按照數(shù)據(jù)手冊(cè)中來就行,和我用過的其他IIC通信的傳感器相比,這個(gè)傳感器的溫度數(shù)據(jù)寄存器是十六位的,而我們一般用的讀取代碼歷程都是一個(gè)字節(jié),然后地址位依向后加一,這個(gè)模塊在讀完高八位時(shí)需要主機(jī)發(fā)送一個(gè)應(yīng)答信號(hào),然后繼續(xù)讀取低八位下面附有時(shí)序圖和源代碼:
30205.c:
#include "30205.h"
#include "delay.h"
//float temperature=0;
void max_init (void)
{
IIC_Init();
I2CwriteByte(MAX30205_ADDRESS, MAX30205_CONFIGURATION, 0x00);
//I2CwriteByte(MAX30205_ADDRESS, MAX30205_THYST , 0x00);
// I2CwriteByte(MAX30205_ADDRESS, MAX30205_TOS, 0x00);
}
//寫入指定地址一個(gè)字節(jié)數(shù)據(jù)
void I2CwriteByte(u8 address,u8 subAddress,u8 data) //
{
//IIC_Start(); //產(chǎn)生開始信號(hào)
I2Cwriteaddr(address|IIC_WRITE,subAddress); //對(duì)器件地址寫入命令信號(hào) 然后寄存器地址
IIC_Send_Byte(data); //對(duì)數(shù)據(jù)進(jìn)行寫進(jìn)去
IIC_Wait_Ack(); //等待回應(yīng)
IIC_Stop(); //產(chǎn)生停止信號(hào)
}
//I2C讀一個(gè)字節(jié)操作
u8 I2CreadByte(u8 address,u8 subAddress)
{
u8 data;
// IIC_Start(); //開始
I2Cwriteaddr(address|IIC_WRITE, subAddress); //對(duì)器件地址發(fā)送寫入命令 寫入寄存器地址
IIC_Start(); //開始
IIC_Send_Byte(address|IIC_READ); //發(fā)送讀取命令
IIC_Wait_Ack(); //等待回應(yīng)
data=IIC_Read_Byte(0);
IIC_Stop(); //產(chǎn)生停止信號(hào)
return data;
}
void I2CreadBytes(u8 address,u8 subAddress,u8*dest,u8 count)
{
int i;
for(i=0;i<count;i++)
{
dest[ i]=I2CreadByte(address,subAddress);
subAddress+=1;
}
}
void I2Cwriteaddr(u8 address,u8 subAddress)//寫地址和寄存器操作
{
IIC_Start(); //產(chǎn)生開始條件
IIC_Send_Byte(address); //寫入器件地址
IIC_Wait_Ack(); //等待回應(yīng)
IIC_Send_Byte(subAddress); //寫入寄存器地址
IIC_Wait_Ack(); //等待回應(yīng)
//IIC_Stop(); //產(chǎn)生停止信號(hào)
}
int16_t Read_max16(u8 address,u8 subAddress)
{
int16_t data;
u8 instant;
// IIC_Start(); //開始
I2Cwriteaddr(address|IIC_WRITE, subAddress); //對(duì)器件地址發(fā)送寫入命令 寫入寄存器地址
IIC_Start(); //開始
IIC_Send_Byte(address|IIC_READ); //發(fā)送讀取命令
IIC_Wait_Ack(); //等待回應(yīng)
data=IIC_Read_Byte(1);//主機(jī)發(fā)送應(yīng)答信號(hào)
//IIC_Wait_Ack();
instant = IIC_Read_Byte(0);//主機(jī)發(fā)送非應(yīng)答信號(hào)
IIC_Stop(); //產(chǎn)生停止信號(hào)
data = (data<<8)|instant;
return data;
}
double GetTemperature(void)
{
double temperature= 0.0;
int16_t temp;
temp = Read_max16(MAX30205_ADDRESS,MAX30205_TEMPERATURE);
temperature = temp*0.00390625;
return temperature;
}
30205.h
#ifndef __30205_H
#define __30205_H
#include "sys.h"
#include "IIC.h"
#define MAX30205_ADDRESS 0X90 //8bit address converted to 7bit
//一些寄存器地址
#define MAX30205_TEMPERATURE 0X00
#define MAX30205_CONFIGURATION 0X01
#define MAX30205_THYST 0X02
#define MAX30205_TOS 0X03
#define IIC_WRITE 0 //數(shù)據(jù)方向 寫入
#define IIC_READ 1 //數(shù)據(jù)方向 讀取
//extern float temperature;
void shutdown(void);
void max_init (void);
void I2CwriteByte(u8 address,u8 subAddress,u8 data);
void I2Cwriteaddr(u8 address,u8 subAddress);
u8 I2CreadByte(u8 address,u8 subAddress);
void I2CreadBytes(u8 address,u8 subAddress,u8*dest,u8 count);
int16_t Read_max16(u8 address,u8 subAddress);
double GetTemperature(void);
#endif
IIC用的是模擬IIC,用的是原子哥的IIC底層
下面是工程代碼鏈接
全部資料51hei下載地址：
3.10完成.7z
(194.83 KB, 下載次數(shù): 143)
2020-5-16 14:16 上傳
點(diǎn)擊文件名下載附件
下載積分: 黑幣 -5
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