求助，stm32驱动AMG8833测温，INT和ADO两脚怎么连，查了说在代码里，但是看不出来

ID:819036 · 发表于 2020-9-14 20:31

1、AMG_IIC.h#ifndef __AMG_I2C_H
#define __AMG_I2C_H
#include "stdint.h"
#include "sys.h"
#include "delay.h"
#define AMG_SDA_RCC RCC_APB2Periph_GPIOB
#define AMG_SDA_PIN GPIO_Pin_7
#define AMG_SDA_IOx GPIOB
#define AMG_SCL_RCC RCC_APB2Periph_GPIOB
#define AMG_SCL_PIN GPIO_Pin_6
#define AMG_SCL_IOx GPIOB
#define AMG_SDA_IN() {GPIOB->CRL&=0x0FFFFFFF;GPIOB->CRL|=8<<28;}
#define AMG_SDA_OUT() {GPIOB->CRL&=0x0FFFFFFF;GPIOB->CRL|=3<<28;}
#define AMG_IIC_SCL PBout(6) //SCL
#define AMG_IIC_SDA PBout(7) //SDA
#define AMG_READ_SDA PBin(7) //输入SDA
#define AMG88xx_ADR 0xD0 //5脚拉低时的设备地址
//Status
#define STATUS_OK 0x00
#define STATUS_FAIL 0x01
void AMG8833_IIC_Init(void);
u8 AMG_IIC_Write_1Byte(u8 SlaveAddress, u8 REG_Address,u8 REG_data);
u8 AMG_IIC_Read_1Byte(u8 SlaveAddress, u8 REG_Address,u8 *REG_data);
uint8_t AMG_I2C_Read_nByte(uint8_t SlaveAddress, uint8_t REG_Address, uint8_t *buf, uint16_t len);
#endif
2、AMG_IIC.c
#include "AMG_IIC.h"
void AMG8833_IIC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( AMG_SDA_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = AMG_SDA_PIN; //端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50Mhz速度
GPIO_Init(AMG_SDA_IOx, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd( AMG_SCL_RCC, ENABLE );
GPIO_InitStructure.GPIO_Pin = AMG_SCL_PIN; //端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50Mhz速度
GPIO_Init(AMG_SCL_IOx, &GPIO_InitStructure);
GPIO_SetBits(AMG_SDA_IOx,AMG_SDA_PIN);//SDA输出高
GPIO_SetBits(AMG_SCL_IOx,AMG_SCL_PIN);//SCL输出高
}
void AMG_IIC_Start(void)
{
AMG_SDA_OUT();//sda线输出
AMG_IIC_SDA=1;
AMG_IIC_SCL=1;
delay_us(4);
AMG_IIC_SDA=0;//START:when CLK is high,DATA change form high to low
delay_us(4);
AMG_IIC_SCL=0;//钳住I2C总线，准备发送或接收数据
}
//产生IIC停止信号
void AMG_IIC_Stop(void)
{
AMG_SDA_OUT();//sda线输出
AMG_IIC_SCL=0;
AMG_IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
delay_us(4);
AMG_IIC_SCL=1;
AMG_IIC_SDA=1;//发送I2C总线结束信号
delay_us(4);
}
u8 AMG_IIC_Wait_Ack(void)
{
u8 ucErrTime=0;
AMG_SDA_IN(); //SDA设置为输入
AMG_IIC_SDA=1;delay_us(1);
AMG_IIC_SCL=1;delay_us(1);
while(AMG_READ_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
AMG_IIC_Stop();
return 1;
}
}
AMG_IIC_SCL=0;//时钟输出0
return 0;
}
//产生ACK应答
void AMG_IIC_Ack(void)
{
AMG_IIC_SCL=0;
AMG_SDA_OUT();
AMG_IIC_SDA=0;
delay_us(2);
AMG_IIC_SCL=1;
delay_us(2);
AMG_IIC_SCL=0;
}
//不产生ACK应答
void AMG_IIC_NAck(void)
{
AMG_IIC_SCL=0;
AMG_SDA_OUT();
AMG_IIC_SDA=1;
delay_us(2);
AMG_IIC_SCL=1;
delay_us(2);
AMG_IIC_SCL=0;
}
//IIC发送一个字节
//返回从机有无应答
//1，有应答
//0，无应答
void AMG_IIC_Send_Byte(u8 txd)
{
u8 t;
AMG_SDA_OUT();
AMG_IIC_SCL=0;//拉低时钟开始数据传输
for(t=0;t<8;t++)
{
if((txd&0x80)>>7)
AMG_IIC_SDA=1;
else
AMG_IIC_SDA=0;
txd<<=1;
delay_us(2);
AMG_IIC_SCL=1;
delay_us(2);
AMG_IIC_SCL=0;
delay_us(2);
}
}
//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
u8 AMG_IIC_Read_Byte(void)
{
unsigned char i,receive=0;
AMG_SDA_IN(); //SDA设置为输入
AMG_IIC_SDA = 1;
delay_us(4);
for(i=0;i<8;i++ )
{
receive<<=1;
AMG_IIC_SCL=0;
delay_us(4);
AMG_IIC_SCL=1;
delay_us(4);
if(AMG_READ_SDA)
receive |= 0x01;
delay_us(4); //1
}
AMG_IIC_SCL = 0;
return receive;
}
//IIC写一个字节数据
u8 AMG_IIC_Write_1Byte(u8 SlaveAddress, u8 REG_Address,u8 REG_data)
{
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress);
if(AMG_IIC_Wait_Ack())
{
AMG_IIC_Stop();//释放总线
return 1;//没应答则退出
}
AMG_IIC_Send_Byte(REG_Address);
AMG_IIC_Wait_Ack();
delay_us(5);
AMG_IIC_Send_Byte(REG_data);
AMG_IIC_Wait_Ack();
AMG_IIC_Stop();
return 0;
}
//IIC读一个字节数据
u8 AMG_IIC_Read_1Byte(u8 SlaveAddress, u8 REG_Address,u8 *REG_data)
{
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress);//发写命令
if(AMG_IIC_Wait_Ack())
{
AMG_IIC_Stop();//释放总线
return 1;//没应答则退出
}
AMG_IIC_Send_Byte(REG_Address);
AMG_IIC_Wait_Ack();
delay_us(5);
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress|0x01);//发读命令
AMG_IIC_Wait_Ack();
*REG_data = AMG_IIC_Read_Byte();
AMG_IIC_Stop();
return 0;
}
//I2C读多个字节数据
uint8_t AMG_I2C_Read_nByte(uint8_t SlaveAddress, uint8_t REG_Address, uint8_t *buf, uint16_t len)
{
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress);//发写命令
if(AMG_IIC_Wait_Ack())
{
AMG_IIC_Stop();//释放总线
return 1;//没应答则退出
}
AMG_IIC_Send_Byte(REG_Address);
AMG_IIC_Wait_Ack();
delay_us(5);
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress|0x01);//发读命令
AMG_IIC_Wait_Ack();
while(len)
{
*buf = AMG_IIC_Read_Byte();
if(1 == len)
{
AMG_IIC_NAck();
}
else
{
AMG_IIC_Ack();
}
buf++;
len--;
}
AMG_IIC_Stop();
return STATUS_OK;
}
//I2C写多个字节数据
uint8_t AMG_I2C_Write_nByte(uint8_t SlaveAddress, uint8_t REG_Address, uint8_t *buf, uint16_t len)
{
AMG_IIC_Start();
AMG_IIC_Send_Byte(SlaveAddress);//发写命令
if(AMG_IIC_Wait_Ack())
{
AMG_IIC_Stop();//释放总线
return 1;//没应答则退出
}
AMG_IIC_Send_Byte(REG_Address);
AMG_IIC_Wait_Ack();
while(len--)
{
AMG_IIC_Send_Byte(*buf++);
AMG_IIC_Wait_Ack();
}
AMG_IIC_Stop();
return STATUS_OK;
}
3、AMG8833.h
#ifndef __AMG8833_H
#define __AMG8833_H
#include "AMG_IIC.h"
#define AMG88xx_PIXEL_TEMP_CONVERSION 0.25
#define AMG88xx_THERMISTOR_CONVERSION 0.0625
enum
{
AMG88xx_PCTL = 0x00,
AMG88xx_RST = 0x01,
AMG88xx_FPSC = 0x02,
AMG88xx_INTC = 0x03,
AMG88xx_STAT = 0x04,
AMG88xx_SCLR = 0x05,
//0x06 reserved
AMG88xx_AVE = 0x07,
AMG88xx_INTHL = 0x08,
AMG88xx_INTHH = 0x09,
AMG88xx_INTLL = 0x0A,
AMG88xx_INTLH = 0x0B,
AMG88xx_IHYSL = 0x0C,
AMG88xx_IHYSH = 0x0D,
AMG88xx_TTHL = 0x0E,
AMG88xx_TTHH = 0x0F,
AMG88xx_INT_OFFSET = 0x010,
AMG88xx_PIXEL_OFFSET = 0x80
};
enum power_modes{
AMG88xx_NORMAL_MODE = 0x00,
AMG88xx_SLEEP_MODE = 0x01,
AMG88xx_STAND_BY_60 = 0x20,
AMG88xx_STAND_BY_10 = 0x21
};
enum sw_resets {
AMG88xx_FLAG_RESET = 0x30,
AMG88xx_INITIAL_RESET = 0x3F
};
enum frame_rates {
AMG88xx_FPS_10 = 0x00,
AMG88xx_FPS_1 = 0x01
};
enum int_enables{
AMG88xx_INT_DISABLED = 0x00,
AMG88xx_INT_ENABLED = 0x01
};
enum int_modes {
AMG88xx_DIFFERENCE = 0x00,
AMG88xx_ABSOLUTE_VALUE = 0x01
};
void AMG8833_Init(void);
float AMG88xx_ReadThermistor(void);
void amg88xx_readPixels(float *buf, uint8_t size);
#endif
4、AMG8833.c
#include "AMG8833.h"
void AMG8833_Init(void)
{
AMG8833_IIC_Init(); //IIC初始化
//enter normal mode
AMG_IIC_Write_1Byte(AMG88xx_ADR,AMG88xx_PCTL,AMG88xx_NORMAL_MODE);
//software reset
AMG_IIC_Write_1Byte(AMG88xx_ADR,AMG88xx_RST,AMG88xx_INITIAL_RESET);
//set to 10 FPS
AMG_IIC_Write_1Byte(AMG88xx_ADR,AMG88xx_FPSC,AMG88xx_FPS_10);
}
float signedMag12ToFloat(uint16_t val)
{
//take first 11 bits as absolute val
uint16_t absVal = (val & 0x7FF);
return (val & 0x800) ? 0 - (float)absVal : (float)absVal ;
}
float AMG88xx_ReadThermistor(void)
{
uint8_t raw[2];
uint16_t recast;
AMG_I2C_Read_nByte(AMG88xx_ADR,AMG88xx_TTHL, raw, 2);
recast = ((uint16_t)raw[1] << 8) | ((uint16_t)raw[0]);
return signedMag12ToFloat(recast) * AMG88xx_THERMISTOR_CONVERSION;
}
void amg88xx_readPixels(float *buf, uint8_t size)
{
uint16_t recast;
float converted;
uint8_t rawArray[128],i;
AMG_I2C_Read_nByte(AMG88xx_ADR,AMG88xx_PIXEL_OFFSET,rawArray,128);
for(i=0; i<size; i++)
{
uint8_t pos = i << 1;
recast = ((uint16_t)rawArray[pos + 1] << 8) | ((uint16_t)rawArray[pos]);
converted = signedMag12ToFloat(recast) * AMG88xx_PIXEL_TEMP_CONVERSION;
buf = converted[i];
}
}

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ID:819036 · 发表于 2020-9-14 20:53

求助大佬，AMG8833引脚中的INT 和ADO在哪，我代码里只找到SCL和SDA的PB6 PB7还有VIN和GND对应的输入输出，找不到INT 和ADO在哪o(╥﹏╥)o

ID:886171 · 发表于 2021-2-24 17:20

int是中断脚吧另外一个好像也不用管我好好多amg8833应用里面这两个脚都是悬空的

ID:1086988 · 发表于 2023-7-11 10:19

INT中断脚在datasheet里面是接的VDD，ADO在datasheet里面是有两种接法。一个接0，slave address是0x68，一个接VDD，slave address是0x69。

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