這是c8t6的原理圖
、
從核心板我們可以看到 c8t6有兩個IIC接口 所以我們可以使用這兩個IIC接口共同使用AHT10和OLED屏
AHT10的核心代碼
下面是aht10.c
從.c文件里的IIC_Init函數 并且結合我們的核心板原理圖我們可以看出 我們使用的是I2C_1
引腳連接PB6 —SCL PB7—SDA
#include "bsp_i2c.h"
#include "delay.h"
uint8_t ack_status=0;
uint8_t readByte[6];
uint8_t aht10_status=0;
uint32_t H1=0; //Humility
uint32_t T1=0; //Temperature
uint8_t AHT10_OutData[4];
uint8_t AHT10sendOutData[10] = {0xFA, 0x06, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF};
void IIC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
IIC_SCL=1;
IIC_SDA=1;
}
//產生IIC起始信號
void IIC_Start(void)
{
SDA_OUT(); //sda線輸出
IIC_SDA=1;
IIC_SCL=1;
delay_us(4);
IIC_SDA=0;//START:when CLK is high,DATA change form high to low
delay_us(4);
IIC_SCL=0;//鉗住I2C總線，準備發(fā)送或接收數據
}
//產生IIC停止信號
void IIC_Stop(void)
{
SDA_OUT();//sda線輸出
IIC_SCL=0;
IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
delay_us(4);
IIC_SCL=1;
IIC_SDA=1;//發(fā)送I2C總線結束信號
delay_us(4);
}
//等待應答信號到來
//返回值：1，接收應答失敗
// 0，接收應答成功
u8 IIC_Wait_Ack(void)
{
u8 ucErrTime=0;
SDA_IN(); //SDA設置為輸入
IIC_SDA=1;delay_us(1);
IIC_SCL=1;delay_us(1);
while(READ_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
IIC_Stop();
return 1;
}
}
IIC_SCL=0;//時鐘輸出0
return 0;
}
//產生ACK應答
void IIC_Ack(void)
{
IIC_SCL=0;
SDA_OUT();
IIC_SDA=0;
delay_us(2);
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
}
//不產生ACK應答
void IIC_NAck(void)
{
IIC_SCL=0;
SDA_OUT();
IIC_SDA=1;
delay_us(2);
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
}
//IIC發(fā)送一個字節(jié)
//返回從機有無應答
//1，有應答
//0，無應答
void IIC_Send_Byte(u8 txd)
{
u8 t;
SDA_OUT();
IIC_SCL=0;//拉低時鐘開始數據傳輸
for(t=0;t<8;t++)
{
IIC_SDA=(txd&0x80)>>7;
txd<<=1;
delay_us(2); //對TEA5767這三個延時都是必須的
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
delay_us(2);
}
}
//讀1個字節(jié)，ack=1時，發(fā)送ACK，ack=0，發(fā)送nACK
u8 IIC_Read_Byte(unsigned char ack)
{
unsigned char i,receive=0;
SDA_IN();//SDA設置為輸入
for(i=0;i<8;i++ )
{
IIC_SCL=0;
delay_us(2);
IIC_SCL=1;
receive<<=1;
if(READ_SDA)receive++;
delay_us(1);
}
if (!ack)
IIC_NAck();//發(fā)送nACK
else
IIC_Ack(); //發(fā)送ACK
return receive;
}
void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr)
{
IIC_Start();
if(device_addr==0xA0) //eeprom地址大于1字節(jié)
IIC_Send_Byte(0xA0 + ((addr/256)<<1));//發(fā)送高地址
else
IIC_Send_Byte(device_addr); //發(fā)器件地址
IIC_Wait_Ack();
IIC_Send_Byte(addr&0xFF); //發(fā)送低地址
IIC_Wait_Ack();
IIC_Send_Byte(data); //發(fā)送字節(jié)
IIC_Wait_Ack();
IIC_Stop();//產生一個停止條件
if(device_addr==0xA0) //
delay_ms(10);
else
delay_us(2);
}
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead) //讀寄存器或讀數據
{
uint16_t data;
IIC_Start();
if(device_addr==0xA0)
IIC_Send_Byte(0xA0 + ((addr/256)<<1));
else
IIC_Send_Byte(device_addr);
IIC_Wait_Ack();
IIC_Send_Byte(addr&0xFF); //發(fā)送低地址
IIC_Wait_Ack();
IIC_Start();
IIC_Send_Byte(device_addr+1); //發(fā)器件地址
IIC_Wait_Ack();
if(ByteNumToRead == 1)//LM75溫度數據為11bit
{
data=IIC_Read_Byte(0);
}
else
{
data=IIC_Read_Byte(1);
data=(data<<8)+IIC_Read_Byte(0);
}
IIC_Stop();//產生一個停止條件
return data;
}
/**********
*上面部分為IO口模塊I2C配置
*
*從這以下開始為AHT10的配置I2C
*函數名有IIC和I2C的區(qū)別，請注意！！！！！
*
*2020/2/23最后修改日期
*
***********/
void read_AHT10_once(void)
{
delay_ms(10);
reset_AHT10();
delay_ms(10);
init_AHT10();
delay_ms(10);
startMeasure_AHT10();
delay_ms(80);
read_AHT10();
delay_ms(5);
}
void reset_AHT10(void)
{
I2C_Start();
I2C_WriteByte(0x70);
ack_status = Receive_ACK();
if(ack_status) printf("1");
else printf("1-n-");
I2C_WriteByte(0xBA);
ack_status = Receive_ACK();
if(ack_status) printf("2");
else printf("2-n-");
I2C_Stop();
/*
AHT10_OutData[0] = 0;
AHT10_OutData[1] = 0;
AHT10_OutData[2] = 0;
AHT10_OutData[3] = 0;
*/
}
void init_AHT10(void)
{
I2C_Start();
I2C_WriteByte(0x70);
ack_status = Receive_ACK();
if(ack_status) printf("3");
else printf("3-n-");
I2C_WriteByte(0xE1);
ack_status = Receive_ACK();
if(ack_status) printf("4");
else printf("4-n-");
I2C_WriteByte(0x08);
ack_status = Receive_ACK();
if(ack_status) printf("5");
else printf("5-n-");
I2C_WriteByte(0x00);
ack_status = Receive_ACK();
if(ack_status) printf("6");
else printf("6-n-");
I2C_Stop();
}
void startMeasure_AHT10(void)
{
//------------
I2C_Start();
I2C_WriteByte(0x70);
ack_status = Receive_ACK();
if(ack_status) printf("7");
else printf("7-n-");
I2C_WriteByte(0xAC);
ack_status = Receive_ACK();
if(ack_status) printf("8");
else printf("8-n-");
I2C_WriteByte(0x33);
ack_status = Receive_ACK();
if(ack_status) printf("9");
else printf("9-n-");
I2C_WriteByte(0x00);
ack_status = Receive_ACK();
if(ack_status) printf("10");
else printf("10-n-");
I2C_Stop();
}
void read_AHT10(void)
{
uint8_t i;
for(i=0; i<6; i++)
{
readByte[ i]=0;
}
//-------------
I2C_Start();
I2C_WriteByte(0x71);
ack_status = Receive_ACK();
if(ack_status) printf("11");
else printf("11-n-");
readByte[0]= I2C_ReadByte();
printf("test0:%d",readByte[0]);
Send_ACK();
readByte[1]= I2C_ReadByte();
printf("test1:%d",readByte[1]);
Send_ACK();
readByte[2]= I2C_ReadByte();
printf("test2:%d",readByte[2]);
Send_ACK();
readByte[3]= I2C_ReadByte();
printf("test3:%d",readByte[3]);
Send_ACK();
readByte[4]= I2C_ReadByte();
printf("test4:%d",readByte[4]);
Send_ACK();
readByte[5]= I2C_ReadByte();
printf("test5:%d",readByte[5]);
SendNot_Ack();
//Send_ACK();
I2C_Stop();
//--------------
if( (readByte[0] & 0x68) == 0x08 )
{
H1 = readByte[1];
H1 = (H1<<8) | readByte[2];
H1 = (H1<<8) | readByte[3];
H1 = H1>>4;
H1 = (H1*1000)/1024/1024;
T1 = readByte[3];
T1 = T1 & 0x0000000F;
T1 = (T1<<8) | readByte[4];
T1 = (T1<<8) | readByte[5];
T1 = (T1*2000)/1024/1024 - 500;
AHT10_OutData[0] = (H1>>8) & 0x000000FF;
AHT10_OutData[1] = H1 & 0x000000FF;
AHT10_OutData[2] = (T1>>8) & 0x000000FF;
AHT10_OutData[3] = T1 & 0x000000FF;
printf("成功了");
}
else
{
AHT10_OutData[0] = 0xFF;
AHT10_OutData[1] = 0xFF;
AHT10_OutData[2] = 0xFF;
AHT10_OutData[3] = 0xFF;
printf("失敗了");
}
printf("\r\n");
printf("溫度:%d%d.%d",T1/100,(T1/10)%10,T1%10);
printf("濕度:%d%d.%d",H1/100,(H1/10)%10,H1%10);
printf("\r\n");
}
uint8_t Receive_ACK(void)
{
uint8_t result=0;
uint8_t cnt=0;
IIC_SCL = 0;
SDA_IN();
delay_us(4);
IIC_SCL = 1;
delay_us(4);
while(READ_SDA && (cnt<100))
{
cnt++;
}
IIC_SCL = 0;
delay_us(4);
if(cnt<100)
{
result=1;
}
return result;
}
void Send_ACK(void)
{
SDA_OUT();
IIC_SCL = 0;
delay_us(4);
IIC_SDA = 0;
delay_us(4);
IIC_SCL = 1;
delay_us(4);
IIC_SCL = 0;
delay_us(4);
SDA_IN();
}
void SendNot_Ack(void)
{
SDA_OUT();
IIC_SCL = 0;
delay_us(4);
IIC_SDA = 1;
delay_us(4);
IIC_SCL = 1;
delay_us(4);
IIC_SCL = 0;
delay_us(4);
IIC_SDA = 0;
delay_us(4);
}
void I2C_WriteByte(uint8_t input)
{
uint8_t i;
SDA_OUT();
for(i=0; i<8; i++)
{
IIC_SCL = 0;
delay_ms(5);
if(input & 0x80)
{
IIC_SDA = 1;
//delaymm(10);
}
else
{
IIC_SDA = 0;
//delaymm(10);
}
IIC_SCL = 1;
delay_ms(5);
input = (input<<1);
}
IIC_SCL = 0;
delay_us(4);
SDA_IN();
delay_us(4);
}
uint8_t I2C_ReadByte(void)
{
uint8_t resultByte=0;
uint8_t i=0, a=0;
IIC_SCL = 0;
SDA_IN();
delay_ms(4);
for(i=0; i<8; i++)
{
IIC_SCL = 1;
delay_ms(3);
a=0;
if(READ_SDA)
{
a=1;
}
else
{
a=0;
}
//resultByte = resultByte | a;
resultByte = (resultByte << 1) | a;
IIC_SCL = 0;
delay_ms(3);
}
SDA_IN();
delay_ms(10);
return resultByte;
}
void set_AHT10sendOutData(void)
{
/* --------------------------
* 0xFA 0x06 0x0A temperature(2 Bytes) humility(2Bytes) short Address(2 Bytes)
* And Check (1 byte)
* -------------------------*/
AHT10sendOutData[3] = AHT10_OutData[0];
AHT10sendOutData[4] = AHT10_OutData[1];
AHT10sendOutData[5] = AHT10_OutData[2];
AHT10sendOutData[6] = AHT10_OutData[3];
// AHT10sendOutData[7] = (drf1609.shortAddress >> 8) & 0x00FF;
// AHT10sendOutData[8] = drf1609.shortAddress & 0x00FF;
// AHT10sendOutData[9] = getXY(AHT10sendOutData,10);
}
void I2C_Start(void)
{
SDA_OUT();
IIC_SCL = 1;
delay_ms(4);
IIC_SDA = 1;
delay_ms(4);
IIC_SDA = 0;
delay_ms(4);
IIC_SCL = 0;
delay_ms(4);
}
void I2C_Stop(void)
{
SDA_OUT();
IIC_SDA = 0;
delay_ms(4);
IIC_SCL = 1;
delay_ms(4);
IIC_SDA = 1;
delay_ms(4);
}
下面是aht10.h
#ifndef __BSP_I2C_H
#define __BSP_I2C_H
#include "sys.h"
#include "delay.h"
#include "usart.h"
//使用IIC1 掛載M24C02,OLED,LM75AD,HT1382 PB6,PB7
#define SDA_IN() {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)8<<28;}
#define SDA_OUT() {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)3<<28;}
//IO操作函數
#define IIC_SCL PBout(6) //SCL
#define IIC_SDA PBout(7) //SDA
#define READ_SDA PBin(7) //輸入SDA
//IIC所有操作函數
void IIC_Init(void); //初始化IIC的IO口
void IIC_Start(void); //發(fā)送IIC開始信號
void IIC_Stop(void); //發(fā)送IIC停止信號
void IIC_Send_Byte(u8 txd); //IIC發(fā)送一個字節(jié)
u8 IIC_Read_Byte(unsigned char ack);//IIC讀取一個字節(jié)
u8 IIC_Wait_Ack(void); //IIC等待ACK信號
void IIC_Ack(void); //IIC發(fā)送ACK信號
void IIC_NAck(void); //IIC不發(fā)送ACK信號
void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr);
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead);//寄存器地址，器件地址，要讀的字節(jié)數
void read_AHT10_once(void);
void reset_AHT10(void);
void init_AHT10(void);
void startMeasure_AHT10(void);
void read_AHT10(void);
uint8_t Receive_ACK(void);
void Send_ACK(void);
void SendNot_Ack(void);
void I2C_WriteByte(uint8_t input);
uint8_t I2C_ReadByte(void);
void set_AHT10sendOutData(void);
void I2C_Start(void);
void I2C_Stop(void);
#endif
主要代碼我壓縮成文件了
OLED的引腳連接是
PB10-SCL
PB11-SDA
可以直接使用
全部資料51hei下載地址：
AHT10+OLED.7z
(197.08 KB, 下載次數: 141)
2020-3-23 23:11 上傳
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