ttp223.h File Reference

Include dependency graph for ttp223.h:

API Description

//Modified: Abhishek Malik <abhishek.malik@intel.com>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "ttp223.h"

#include "upm_utilities.h"

int main()
{
    ttp223_context dev = ttp223_init(2);
    bool abc = 0;
    while(1){
        if(ttp223_is_pressed(dev, &abc) != UPM_SUCCESS){
            printf("an error has occurred\n");
        }
        upm_delay(1);
        printf("value retrieved: %d\n", abc);
    }

    return 0;
}

Go to the source code of this file.

Data Structures
struct	_ttp223_context

Functions
ttp223_context	ttp223_init (int pin)
void	ttp223_close (ttp223_context dev)
upm_result_t	ttp223_is_pressed (ttp223_context dev, bool *value)
upm_result_t	ttp223_install_isr (ttp223_context dev, mraa_gpio_edge_t edge_level, void(*isr)(void *), void *arg)
upm_result_t	ttp223_uninstall_isr (ttp223_context dev)

Typedefs
typedef struct _ttp223_context *	ttp223_context

Function Documentation

ttp223_context ttp223_init

(

int

pin

)

Sensor Init function

Parameters

pin	The pin number the sensor is attached to

Returns

void* pointer to the sensor struct

void ttp223_close

(

ttp223_context

dev

)

Sensor Module close function

Parameters

dev	pointer to the sensor struct

upm_result_t ttp223_is_pressed	(	ttp223_context	dev,
		bool *	value
	)

Function to tell if the sensor is pressed

Parameters

dev	pointer to the sensor struct
value	pointer to store whether the sensor is pressed or not

Returns

upm_result_t UPM success/error code

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upm_result_t ttp223_install_isr	(	ttp223_context	dev,
		mraa_gpio_edge_t	edge_level,
		void(*)(void *)	isr,
		void *	arg
	)

Installs an interrupt service routine (ISR) to be called when the button is activated or deactivated.

Parameters

dev	pointer to the sensor struct
edge_level	one of mraa_gpio_edge_t values
isr	pointer to a function to be called on interrupt
arg	pointer to an object to be supplied as an argument to the ISR.

Returns

upm_result_t UPM success/error code

upm_result_t ttp223_uninstall_isr

(

ttp223_context

dev

)

Uninstall a previously installed interrupt handler

Parameters

dev	pointer to the sensor struct

Returns

upm_result_t UPM success/error code

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Typedef Documentation

typedef struct _ttp223_context * ttp223_context

device context