lis3dh/example/fifo.c

#define _GNU_SOURCE
#include <unistd.h>
#include <stdio.h>
#include "lis3dh.h"
#include "i2c.h"

int main() {

    lis3dh_t lis;
    struct lis3dh_fifo_data fifo;
    int i;

    lis.dev.init = i2c_init;
    lis.dev.read = i2c_read;
    lis.dev.write = i2c_write;
    lis.dev.sleep = usleep;
    lis.dev.deinit = i2c_deinit;

    /* initialise LIS3DH struct */
    if (lis3dh_init(&lis)) {
        /* error handling */
    }

    /* reset device just in case */
    if (lis3dh_reset(&lis)) {
        /* error handling */
    }

    lis.cfg.mode = LIS3DH_MODE_HR;
    lis.cfg.range = LIS3DH_FS_4G;
    lis.cfg.rate = LIS3DH_ODR_100_HZ;
    lis.cfg.fifo.mode = LIS3DH_FIFO_MODE_NORMAL;

    /* write device config */
    if (lis3dh_configure(&lis)) {
        /* error handling */
    }

    /* read as many [x y z] sets as specified by watermark level (size) default (max/32) */
    /* copy them to the fifo data struct `fifo' */
    if (lis3dh_read_fifo(&lis, &fifo)) {
        /* error handling */
    }

    /* read out fifo buffer data */
    for(i=0; i<fifo.size; i++) {
        printf("x: %d mg, y: %d mg, z: %d mg\n", fifo.x[i], fifo.y[i], fifo.z[i]);
    }

    /* deinitialise struct */
    if (lis3dh_deinit(&lis)) {
        /* error handling */
    }

    return 0;
}