dht11 base driver function

dht11 base driver modules More...

Data Structures
struct	dht11_handle_s
	dht11 handle structure definition More...
struct	dht11_info_s
	dht11 info structure definition More...

Typedefs
typedef struct dht11_handle_s	dht11_handle_t
	dht11 handle structure definition More...
typedef struct dht11_info_s	dht11_info_t
	dht11 info structure definition More...

Functions
uint8_t	dht11_info (dht11_info_t *info)
	get chip's information More...
uint8_t	dht11_init (dht11_handle_t *handle)
	initialize the chip More...
uint8_t	dht11_deinit (dht11_handle_t *handle)
	close the chip More...
uint8_t	dht11_read_temperature_humidity (dht11_handle_t *handle, uint16_t *temperature_raw, float *temperature_s, uint16_t *humidity_raw, uint8_t *humidity_s)
	read the temperature and humidity data More...
uint8_t	dht11_read_humidity (dht11_handle_t *handle, uint16_t *raw, uint8_t *s)
	read the humidity data More...
uint8_t	dht11_read_temperature (dht11_handle_t *handle, uint16_t *raw, float *s)
	read the temperature data More...

Detailed Description

dht11 base driver modules

Typedef Documentation

dht11_handle_t

typedef struct dht11_handle_s dht11_handle_t

dht11 handle structure definition

dht11_info_t

typedef struct dht11_info_s dht11_info_t

dht11 info structure definition

Function Documentation

dht11_deinit()

uint8_t dht11_deinit

(

dht11_handle_t *

handle

)

close the chip

Parameters

[in]

*handle

pointer to a dht11 handle structure

Returns

status code

• 0 success
• 1 bus deinit failed
• 2 handle is NULL
• 3 handle is not initialized

Note

none

Definition at line 554 of file driver_dht11.c.

dht11_info()

uint8_t dht11_info

(

dht11_info_t *

info

)

get chip's information

Parameters

[out]

*info

pointer to a dht11 info structure

Returns

status code

• 0 success
• 2 handle is NULL

Note

none

Definition at line 584 of file driver_dht11.c.

dht11_init()

uint8_t dht11_init

(

dht11_handle_t *

handle

)

initialize the chip

Parameters

[in]

*handle

pointer to a dht11 handle structure

Returns

status code

• 0 success
• 1 bus initialization failed
• 2 handle is NULL
• 3 linked functions is NULL
• 4 reset failed

Note

none

Definition at line 467 of file driver_dht11.c.

dht11_read_humidity()

uint8_t dht11_read_humidity	(	dht11_handle_t *	handle,
		uint16_t *	raw,
		uint8_t *	s
	)

read the humidity data

Parameters

[in]	*handle	pointer to a dht11 handle structure
[out]	*raw	pointer to a raw humidity buffer
[out]	*s	pointer to a converted humidity buffer

Returns

status code

• 0 success
• 1 read humidity failed
• 2 handle is NULL
• 3 handle is not initialized

Note

none

Definition at line 260 of file driver_dht11.c.

dht11_read_temperature()

uint8_t dht11_read_temperature	(	dht11_handle_t *	handle,
		uint16_t *	raw,
		float *	s
	)

read the temperature data

Parameters

[in]	*handle	pointer to a dht11 handle structure
[out]	*raw	pointer to a raw temperature buffer
[out]	*s	pointer to a converted temperature buffer

Returns

status code

• 0 success
• 1 read temperature failed
• 2 handle is NULL
• 3 handle is not initialized

Note

none

Definition at line 398 of file driver_dht11.c.

dht11_read_temperature_humidity()

uint8_t dht11_read_temperature_humidity	(	dht11_handle_t *	handle,
		uint16_t *	temperature_raw,
		float *	temperature_s,
		uint16_t *	humidity_raw,
		uint8_t *	humidity_s
	)

read the temperature and humidity data

Parameters

[in]	*handle	pointer to a dht11 handle structure
[out]	*temperature_raw	pointer to a raw temperature buffer
[out]	*temperature_s	pointer to a converted temperature buffer
[out]	*humidity_raw	pointer to a raw humidity buffer
[out]	*humidity_s	pointer to a converted humidity buffer

Returns

status code

• 0 success
• 1 read temperature humidity failed
• 2 handle is NULL
• 3 handle is not initialized

Note

none

Definition at line 324 of file driver_dht11.c.