iio.h File Reference

API Description

An iio context represents an IIO device

    iio_device0 = mraa_iio_init(0);
    if (iio_device0 == NULL) {
        return EXIT_FAILURE;
    }

    float iio_float;
    int iio_int;
    mraa_result_t ret;

    ret = mraa_iio_write_float(iio_device0, "in_accel_scale", 0.019163);
    if (ret == MRAA_SUCCESS) {
        fprintf(stdout, "IIO write success\n");
    }

    ret = mraa_iio_read_float(iio_device0, "in_accel_scale", &iio_float);
    if (ret == MRAA_SUCCESS) {
        fprintf(stdout, "IIO read %f\n", iio_float);
    }

    ret = mraa_iio_write_int(iio_device0, "scan_elements/in_accel_x_en", 1);
    if (ret == MRAA_SUCCESS) {
        fprintf(stdout, "IIO write success\n");
    }

    ret = mraa_iio_read_int(iio_device0, "scan_elements/in_accel_x_en", &iio_int);
    if (ret == MRAA_SUCCESS) {
        fprintf(stdout, "IIO read %d\n", iio_int);
    }

    if (mraa_iio_trigger_buffer(iio_device0, interrupt, NULL) == MRAA_SUCCESS) {
        sleep(100);
        return EXIT_SUCCESS;
    }

    /*
    struct iio_event_data event;
    iio_device6 = mraa_iio_init(6);
    if (iio_device6 == NULL) {
        return EXIT_FAILURE;
    }
    mraa_iio_write_int(iio_device6, "events/in_proximity2_thresh_either_en", 1);


    // Blocking until event fired
    if (mraa_iio_event_poll(iio_device6, &event) == MRAA_SUCCESS) {
        event_interrupt(&event); //just to show data
    }

    if (mraa_iio_event_setup_callback(iio_device6, event_interrupt, NULL) == MRAA_SUCCESS) {
        sleep(100);
        return EXIT_SUCCESS;
    }*/

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Data Structures
struct	mraa_iio_channel
struct	mraa_iio_event

Functions
mraa_iio_context	mraa_iio_init (int device)
mraa_result_t	mraa_iio_trigger_buffer (mraa_iio_context dev, void(*fptr)(char *data), void *args)
const char *	mraa_iio_get_device_name (mraa_iio_context dev)
int	mraa_iio_get_device_num_by_name (const char *name)
int	mraa_iio_read_size (mraa_iio_context dev)
mraa_iio_channel *	mraa_iio_get_channels (mraa_iio_context dev)
int	mraa_iio_get_channel_count (mraa_iio_context dev)
mraa_result_t	mraa_iio_read_float (mraa_iio_context dev, const char *filename, float *data)
mraa_result_t	mraa_iio_read_int (mraa_iio_context dev, const char *filename, int *data)
mraa_result_t	mraa_iio_read_string (mraa_iio_context dev, const char *filename, char *data, int max_len)
mraa_result_t	mraa_iio_write_float (mraa_iio_context dev, const char *attr_chan, const float data)
mraa_result_t	mraa_iio_write_int (mraa_iio_context dev, const char *attr_chan, const int data)
mraa_result_t	mraa_iio_write_string (mraa_iio_context dev, const char *attr_chan, const char *data)
mraa_result_t	mraa_iio_get_channel_data (mraa_iio_context dev)
mraa_result_t	mraa_iio_get_event_data (mraa_iio_context dev)
mraa_result_t	mraa_iio_event_poll (mraa_iio_context dev, struct iio_event_data *data)
mraa_result_t	mraa_iio_event_setup_callback (mraa_iio_context dev, void(*fptr)(struct iio_event_data *data, void *args), void *args)
mraa_result_t	mraa_iio_event_extract_event (struct iio_event_data *event, int *chan_type, int *modifier, int *type, int *direction, int *channel, int *channel2, int *different)
mraa_result_t	mraa_iio_get_mounting_matrix (mraa_iio_context dev, float mm[9])
mraa_result_t	mraa_iio_create_trigger (mraa_iio_context dev, const char *trigger)
mraa_result_t	mraa_iio_update_channels (mraa_iio_context dev)
mraa_result_t	mraa_iio_close (mraa_iio_context dev)

Typedefs
typedef struct _iio *	mraa_iio_context

Function Documentation

mraa_iio_context mraa_iio_init

(

int

device

)

Initialise iio context

Parameters

bus	iio device to use

Returns

i2c context or NULL

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mraa_result_t mraa_iio_close

(

mraa_iio_context

dev

)

De-inits an mraa_iio_context device

Parameters

dev	The iio context

Returns

Result of operation

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Typedef Documentation

typedef struct _iio* mraa_iio_context

Opaque pointer definition to the internal struct _iio

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