78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
#define _GNU_SOURCE /* usleep() */
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#include <unistd.h> /* usleep() */
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#include <stdio.h>
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#include "lis3dh.h"
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#include "i2c.h"
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#include "interrupt.h"
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/* Raspberry Pi GPIO pin connected to LIS3DH INT1 pin */
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#define GPIO_INTERRUPT_PIN_INT1 12
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int main() {
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lis3dh_t lis;
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struct lis3dh_fifo_data fifo;
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int i;
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lis.dev.init = i2c_init;
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lis.dev.read = i2c_read;
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lis.dev.write = i2c_write;
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lis.dev.sleep = usleep;
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lis.dev.deinit = i2c_deinit;
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/* initialise struct and check device id */
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if (lis3dh_init(&lis)) {
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/* error handling */
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}
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/* reset just in case*/
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if (lis3dh_reset(&lis)) {
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/* error handling */
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}
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/* register interrupt */
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if (int_register(GPIO_INTERRUPT_PIN_INT1)) {
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/* error handling */
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}
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lis.cfg.mode = LIS3DH_MODE_HR;
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lis.cfg.range = LIS3DH_FS_2G;
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lis.cfg.rate = LIS3DH_ODR_100_HZ;
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lis.cfg.pin1.overrun = 1;
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lis.cfg.fifo.mode = LIS3DH_FIFO_MODE_STREAM;
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lis.cfg.fifo.trig = LIS3DH_FIFO_TRIG_INT1;
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/* write cfg to device */
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if (lis3dh_configure(&lis)) {
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/* error handling */
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}
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for ( ;; ) {
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/* wait until FIFO overrun interrupt is active */
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if (int_poll(GPIO_INTERRUPT_PIN_INT1)) {
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/* error handling */
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}
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/* read FIFO into `fifo_data' struct `fifo' */
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if (lis3dh_read_fifo(&lis, &fifo)) {
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/* error handling */
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}
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/* print data .. */
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for(i=0; i<fifo.size; i++) {
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printf("x: %4.4d mg, y: %4.4d mg, z: %4.4d mg\n", fifo.x[i], fifo.y[i], fifo.z[i]);
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}
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printf("fifo.size=%d\n", fifo.size);
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/* No need to reset the FIFO engine in stream mode */
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}
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/* deinitalise device */
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if (lis3dh_deinit(&lis)) {
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/* error handling */
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}
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return 0;
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} |