TM_HCSR04_Functions

Library Functions. More...

Functions
uint8_t	TM_HCSR04_Init (TM_HCSR04_t *HCSR04, GPIO_TypeDef *ECHO_GPIOx, uint16_t ECHO_GPIO_Pin, GPIO_TypeDef *TRIGGER_GPIOx, uint16_t TRIGGER_GPIO_Pin)
	Initializes HC-SR04 sensor. More...
float	TM_HCSR04_Read (TM_HCSR04_t *HCSR04)
	Starts sensor measurement and read it's data. More...

Detailed Description

Library Functions.

Function Documentation

uint8_t TM_HCSR04_Init	(	TM_HCSR04_t *	HCSR04,
		GPIO_TypeDef *	ECHO_GPIOx,
		uint16_t	ECHO_GPIO_Pin,
		GPIO_TypeDef *	TRIGGER_GPIOx,
		uint16_t	TRIGGER_GPIO_Pin
	)

Initializes HC-SR04 sensor.

Parameters

*HCSR04	Pointer to empty TM_HCSR04_t structure to save initialization data
*ECHO_GPIOx	Pointer to GPIOx PORT for ECHO pin
ECHO_GPIO_Pin	GPIO Pin for ECHO pin
*TRIGGER_GPIOx	Pointer to GPIOx PORT for TRIGGER pin
TRIGGER_GPIO_Pin	GPIO Pin for ECHO pin

Return values

HC-SR04

status: 0: Device not detected > 0: Device is ready to use

float TM_HCSR04_Read

(

TM_HCSR04_t *

HCSR04

)

Starts sensor measurement and read it's data.

Parameters

*HCSR04

Pointer to TM_HCSR04_t structure to save initialization data

Return values

Distance

in float: > 0: Valid distance in cm (centimeters) -1: Error