humid_sht.c File Reference

SHTxx sensor interface. More...

#include "std.h"
#include "mcu_periph/gpio.h"
#include "mcu_periph/uart.h"
#include "pprzlink/messages.h"
#include "subsystems/datalink/downlink.h"
#include "humid_sht.h"

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Go to the source code of this file.

Macros
#define	noACK   0
#define	ACK   1
#define	TEMP   0
#define	HUMI   1
#define	STATUS_REG_W   0x06
#define	STATUS_REG_R   0x07
#define	MEASURE_TEMP   0x03
#define	MEASURE_HUMI   0x05
#define	RESET   0x1e
#define	SHT_IDLE   0
#define	SHT_MEASURING_HUMID   1
#define	SHT_MEASURING_TEMP   2
#define	DATA_SET   gpio_setup_input(SHT_DAT_GPIO)
	set data pin to input More...
#define	DATA_CLR   gpio_setup_output(SHT_DAT_GPIO)
	set data pin to output More...
#define	DATA_IN   gpio_get(SHT_DAT_GPIO)
	get data pin More...
#define	SCK_SET   gpio_set(SHT_SCK_GPIO)
	set clock pin to high More...
#define	SCK_CLR   gpio_clear(SHT_SCK_GPIO)
	set clock pin to low More...

Functions
uint8_t	s_write_byte (uint8_t value)
uint8_t	s_read_byte (uint8_t ack)
void	s_transstart (void)
void	s_connectionreset (void)
uint8_t	s_read_statusreg (uint8_t *p_value, uint8_t *p_checksum)
uint8_t	s_write_statusreg (uint8_t *p_value)
uint8_t	s_measure (uint16_t *p_value, uint8_t *p_checksum, uint8_t mode)
uint8_t	s_start_measure (uint8_t mode)
uint8_t	s_read_measure (uint16_t *p_value, uint8_t *p_checksum)
void	calc_sht (uint16_t hum, uint16_t tem, float *fhum, float *ftem)
uint8_t	humid_sht_reset (void)
void	humid_sht_init (void)
void	humid_sht_periodic (void)

Variables
uint16_t	humidsht
uint16_t	tempsht
float	fhumidsht
float	ftempsht
bool	humid_sht_available
uint8_t	humid_sht_status

Detailed Description

SHTxx sensor interface.

This reads the values for humidity and temperature from the SHTxx sensor through bit banging.

Definition in file humid_sht.c.

Macro Definition Documentation

#define ACK   1

Definition at line 48 of file humid_sht.c.

Referenced by s_measure(), s_read_measure(), and s_read_statusreg().

#define DATA_CLR   gpio_setup_output(SHT_DAT_GPIO)

set data pin to output

Definition at line 76 of file humid_sht.c.

Referenced by s_read_byte(), s_transstart(), and s_write_byte().

#define DATA_IN   gpio_get(SHT_DAT_GPIO)

get data pin

Definition at line 78 of file humid_sht.c.

Referenced by s_measure(), s_read_byte(), s_read_measure(), and s_write_byte().

#define DATA_SET   gpio_setup_input(SHT_DAT_GPIO)

set data pin to input

Definition at line 74 of file humid_sht.c.

Referenced by s_connectionreset(), s_read_byte(), s_transstart(), and s_write_byte().

#define HUMI   1

Definition at line 50 of file humid_sht.c.

Referenced by humid_sht_periodic(), s_measure(), and s_start_measure().

#define MEASURE_HUMI   0x05

Definition at line 60 of file humid_sht.c.

Referenced by s_measure(), and s_start_measure().

#define MEASURE_TEMP   0x03

Definition at line 58 of file humid_sht.c.

Referenced by s_measure(), and s_start_measure().

#define noACK   0

Definition at line 47 of file humid_sht.c.

Referenced by s_measure(), s_read_measure(), and s_read_statusreg().

#define RESET   0x1e

Definition at line 62 of file humid_sht.c.

Referenced by exti2_irq_handler(), and humid_sht_reset().

#define SCK_CLR   gpio_clear(SHT_SCK_GPIO)

set clock pin to low

Definition at line 83 of file humid_sht.c.

Referenced by s_connectionreset(), s_read_byte(), s_transstart(), and s_write_byte().

#define SCK_SET   gpio_set(SHT_SCK_GPIO)

set clock pin to high

Definition at line 81 of file humid_sht.c.

Referenced by s_connectionreset(), s_read_byte(), s_transstart(), and s_write_byte().

#define SHT_IDLE   0

Definition at line 65 of file humid_sht.c.

Referenced by humid_sht_init(), and humid_sht_periodic().

#define SHT_MEASURING_HUMID   1

Definition at line 66 of file humid_sht.c.

Referenced by humid_sht_periodic().

#define SHT_MEASURING_TEMP   2

Definition at line 67 of file humid_sht.c.

Referenced by humid_sht_periodic().

#define STATUS_REG_R   0x07

Definition at line 56 of file humid_sht.c.

Referenced by s_read_statusreg().

#define STATUS_REG_W   0x06

Definition at line 54 of file humid_sht.c.

Referenced by s_write_statusreg().

#define TEMP   0

Definition at line 49 of file humid_sht.c.

Referenced by humid_sht_periodic(), s_measure(), and s_start_measure().

Function Documentation

void calc_sht	(	uint16_t	hum,
		uint16_t	tem,
		float *	fhum,
		float *	ftem
	)

Definition at line 257 of file humid_sht.c.

References C1, and C2.

Referenced by humid_sht_periodic().

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void humid_sht_init

(

void

)

Definition at line 299 of file humid_sht.c.

References gpio_clear(), gpio_setup_input(), gpio_setup_output(), humid_sht_available, humid_sht_status, and SHT_IDLE.

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void humid_sht_periodic

(

void

)

Definition at line 316 of file humid_sht.c.

References calc_sht(), checksum, GpsState::course, DefaultChannel, DefaultDevice, fhumidsht, GpsState::fix, ftempsht, gps, GpsState::gspeed, GpsState::hmsl, HUMI, humid_sht_available, humid_sht_status, humidsht, LlaCoor_i::lat, GpsState::lla_pos, LlaCoor_i::lon, GpsState::ned_vel, pprzLogFile, s_connectionreset(), s_read_measure(), s_start_measure(), SHT_IDLE, SHT_MEASURING_HUMID, SHT_MEASURING_TEMP, TEMP, tempsht, GpsState::tow, GpsState::week, and NedCoor_i::z.

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uint8_t humid_sht_reset

(

void

)

Definition at line 288 of file humid_sht.c.

References RESET, s_connectionreset(), and s_write_byte().

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void s_connectionreset

(

void

)

Definition at line 167 of file humid_sht.c.

References DATA_SET, s_transstart(), SCK_CLR, and SCK_SET.

Referenced by humid_sht_periodic(), and humid_sht_reset().

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uint8_t s_measure	(	uint16_t *	p_value,
		uint8_t *	p_checksum,
		uint8_t	mode
	)

Definition at line 208 of file humid_sht.c.

References ACK, DATA_IN, HUMI, MEASURE_HUMI, MEASURE_TEMP, noACK, s_read_byte(), s_transstart(), s_write_byte(), and TEMP.

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uint8_t s_read_byte

(

uint8_t

ack

)

Definition at line 124 of file humid_sht.c.

References DATA_CLR, DATA_IN, DATA_SET, SCK_CLR, SCK_SET, and val.

Referenced by s_measure(), s_read_measure(), and s_read_statusreg().

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uint8_t s_read_measure	(	uint16_t *	p_value,
		uint8_t *	p_checksum
	)

Definition at line 244 of file humid_sht.c.

References ACK, DATA_IN, noACK, and s_read_byte().

Referenced by humid_sht_periodic().

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uint8_t s_read_statusreg	(	uint8_t *	p_value,
		uint8_t *	p_checksum
	)

Definition at line 185 of file humid_sht.c.

References ACK, noACK, s_read_byte(), s_transstart(), s_write_byte(), and STATUS_REG_R.

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uint8_t s_start_measure

(

uint8_t

mode

)

Definition at line 229 of file humid_sht.c.

References HUMI, MEASURE_HUMI, MEASURE_TEMP, s_transstart(), s_write_byte(), and TEMP.

Referenced by humid_sht_periodic().

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void s_transstart

(

void

)

Definition at line 144 of file humid_sht.c.

References DATA_CLR, DATA_SET, SCK_CLR, and SCK_SET.

Referenced by s_connectionreset(), s_measure(), s_read_statusreg(), s_start_measure(), and s_write_statusreg().

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uint8_t s_write_byte

(

uint8_t

value

)

Definition at line 104 of file humid_sht.c.

References DATA_CLR, DATA_IN, DATA_SET, SCK_CLR, and SCK_SET.

Referenced by humid_sht_reset(), s_measure(), s_read_statusreg(), s_start_measure(), and s_write_statusreg().

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uint8_t s_write_statusreg

(

uint8_t *

p_value

)

Definition at line 197 of file humid_sht.c.

References s_transstart(), s_write_byte(), and STATUS_REG_W.

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Variable Documentation

float fhumidsht

Definition at line 87 of file humid_sht.c.

Referenced by humid_sht_periodic().

float ftempsht

Definition at line 87 of file humid_sht.c.

Referenced by humid_hih_periodic(), and humid_sht_periodic().

bool humid_sht_available

Definition at line 88 of file humid_sht.c.

Referenced by humid_sht_init(), and humid_sht_periodic().

uint8_t humid_sht_status

Definition at line 89 of file humid_sht.c.

Referenced by humid_sht_init(), and humid_sht_periodic().

uint16_t humidsht

Definition at line 86 of file humid_sht.c.

Referenced by humid_sht_periodic().

uint16_t tempsht

Definition at line 86 of file humid_sht.c.

Referenced by humid_sht_periodic().