基于ESP8266 non_os sdk 开发
关于ATH10的介绍就不赘述了。不懂的伙伴直接去百度找相关资料学习。在这里，我直接给出了驱动代码。
AHT10 头文件
#ifndef _I2C_ATH10_H_ #define _I2C_ATH10_H_ #include "c_types.h" void delayms(u32 ms); void AHT10Init(); void AHT10_RST(); unsigned char AHT10_Status(); unsigned char AHT10_CalEN(); void ATH10_Init(); void AHT10_Mea(); void AHT10_Read_Data(); #endif AHT10 C文件
#include "driver/i2c_master.h" #include "osapi.h" #include "c_types.h" #include "gpio.h" #define AHT10AddWr 0x70 //AHT10写数据地址 #define AHT10AddRd 0x71 //AHT10读数据地址 void delayms(u32 ms) {
while (ms--) {
os_delay_us(1000); } } void AHT10Init() //AHT10初始化 {
u8 ack; delayms(12);
i2c_master_start
(
)
;
i2c_master_writeByte
(
0x70
)
; ack
=
i2c_master_checkAck
(
)
;
i2c_master_writeByte
(
0xe1
)
;
//配置寄存器 ack
=
i2c_master_checkAck
(
)
;
i2c_master_writeByte
(
0x08
)
; ack
=
i2c_master_checkAck
(
)
;
i2c_master_writeByte
(
0x00
)
; ack
=
i2c_master_checkAck
(
)
;
if
(
!ack
)
{
os_printf
(
"AHT10Init failed\n"
)
;
}
i2c_master_stop
(
)
;
delayms
(
400
)
;
}
void
AHT10_RST
(
)
//软复位
{
i2c_master_start
(
)
;
i2c_master_writeByte
(AHT10AddWr
)
;
i2c_master_writeByte
(
0xba
)
;
i2c_master_stop
(
)
;
}
unsigned
char
AHT10_Status
(
)
//读取AHT10状态寄存器
{
unsigned
char byte_first
;
i2c_master_start
(
)
;
i2c_master_writeByte
(AHT10AddRd
)
; byte_first
=
i2c_master_readByte
(
)
;
//接收数据
i2c_master_send_nack
(
)
;
//非应答
i2c_master_stop
(
)
;
return byte_first
;
}
unsigned
char
AHT10_CalEN
(
)
//判断AHT10校准使能
{
unsigned
char val
; val
=
AHT10_Status
(
)
;
if
(
(val
&
0x68
)
==
0x08
)
return
1
;
else
return
0
;
}
void
ATH10_Init
(
)
{
AHT10Init
(
)
;
//等待状态字status的bit[3]=1时采取读取数据。如果bit[3]不等于1
//发软件复位给0xBA给ATH10，再重新初始化ATH10
if
(
AHT10_CalEN
(
)
==
0
)
{
while
(
AHT10_CalEN
(
)
==
0
)
{
system_soft_wdt_feed
(
)
;
AHT10_RST
(
)
;
delayms
(
25
)
;
AHT10Init
(
)
;
if
(
AHT10_CalEN
(
)
==
1
)
{
os_printf
(
"bit3 ok\n"
)
;
break
;
}
}
}
else
{
os_printf
(
"bit3 ok\n"
)
;
}
}
void
AHT10_Mea
(
)
//触发测量
{
u8 ack
;
i2c_master_start
(
)
;
i2c_master_writeByte
(AHT10AddWr
)
; ack
=
i2c_master_checkAck
(
)
;
delayms
(
20
)
;
i2c_master_writeByte
(
0xac
)
;
//触发测量指令 ack
=
i2c_master_checkAck
(
)
;
delayms
(
20
)
;
i2c_master_writeByte
(
0x33
)
;
delayms
(
20
)
; ack
=
i2c_master_checkAck
(
)
;
i2c_master_writeByte
(
0x00
)
;
delayms
(
20
)
; ack
=
i2c_master_checkAck
(
)
;
if
(
!ack
)
{
os_printf
(
"AHT10_Mea failed\n"
)
;
}
i2c_master_stop
(
)
;
}
void
AHT10_Read_Data
(
)
//接收湿度温度数据
{
int ct
[
2
]
;
volatile
unsigned
char byte_1th
=
0
;
volatile
unsigned
char byte_2th
=
0
;
volatile
unsigned
char byte_3th
=
0
;
volatile
unsigned
char byte_4th
=
0
;
volatile
unsigned
char byte_5th
=
0
;
volatile
unsigned
char byte_6th
=
0
; u32 retudata
=
0
;
unsigned
char cnt
=
0
;
int temp
;
int Rh
;
AHT10_Mea
(
)
;
//触发测量
delayms
(
200
)
;
//延时200毫秒 cnt
=
0
;
while
(
(
(
AHT10_Status
(
)
&
0x80
)
==
0x80
)
)
{
delayms
(
3
)
;
if
(cnt
++
>=
100
)
{
break
;
}
}
i2c_master_start
(
)
;
i2c_master_writeByte
(AHT10AddRd
)
;
if
(
!
i2c_master_checkAck
(
)
)
{
os_printf
(
"no get Addrd\n"
)
;
} byte_1th
=
i2c_master_readByte
(
)
;
//状态数据
i2c_master_send_ack
(
)
;
//应答
delayms
(
10
)
; byte_2th
=
i2c_master_readByte
(
)
;
//湿度数据
i2c_master_send_ack
(
)
;
delayms
(
10
)
; byte_3th
=
i2c_master_readByte
(
)
;
//湿度数据
i2c_master_send_ack
(
)
;
delayms
(
10
)
; byte_4th
=
i2c_master_readByte
(
)
;
//高4位为湿度 低4位为温度
i2c_master_send_ack
(
)
;
delayms
(
10
)
; byte_5th
=
i2c_master_readByte
(
)
;
//温度数据
i2c_master_send_ack
(
)
;
delayms
(
10
)
; byte_6th
=
i2c_master_readByte
(
)
;
//温度数据
i2c_master_send_nack
(
)
;
i2c_master_stop
(
)
; retudata
=
0
;
//原始湿度数据合成 retudata
=
(retudata
| byte_2th
)
<<
8
; retudata
=
(retudata
| byte_3th
)
<<
8
; retudata
= retudata
| byte_4th
; retudata
= retudata
>>
4
; ct
[
0
]
= retudata
; retudata
=
0
;
//原始温度数据合成 retudata
=
(retudata
| byte_4th
)
<<
8
; retudata
=
(retudata
| byte_5th
)
<<
8
; retudata
= retudata
| byte_6th
; retudata
= retudata
&
0xfffff
; ct
[
1
]
= retudata
;
delayms
(
10
)
; Rh
=
(ct
[
0
]
*
1000
/
1024
/
1024
)
; temp
=
(ct
[
1
]
*
200
*
10
/
1024
/
1024
-
500
)
;
//计算温度
os_printf
(
"temp: %d.%d℃ RH: %d.%d%\n"
, temp
/
10
, temp
%
10
, Rh
/
10
, Rh
%
10
)
;
}