tap_detection.c

#include <stdio.h>
#include "bma400.h"

void set_interface(enum bma400_intf intf, struct bma400_dev *dev);
void delay_ms(uint32_t period);
int8_t i2c_reg_write(void *intf_ptr, uint8_t i2c_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t length);
int8_t i2c_reg_read(void *intf_ptr, uint8_t i2c_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t length);
int8_t spi_reg_write(void *intf_ptr, uint8_t cs, uint8_t reg_addr, uint8_t *reg_data, uint16_t length);
int8_t spi_reg_read(void *intf_ptr, uint8_t cs, uint8_t reg_addr, uint8_t *reg_data, uint16_t length);
void print_rslt(int8_t rslt);

int main(int argc, char const *argv[])
{
	struct bma400_dev bma;
	struct bma400_int_enable tap_int[2];
	struct bma400_sensor_conf conf[2];
	int8_t rslt;
	uint32_t poll_period = 5, test_dur_ms = 30000;
	uint16_t int_status;

	set_interface(BMA400_SPI_INTF, &bma);

	rslt = bma400_init(&bma);
	print_rslt(rslt);

	rslt = bma400_soft_reset(&bma);
	print_rslt(rslt);

	conf[0].type = BMA400_ACCEL;
	conf[1].type = BMA400_TAP_INT;

	rslt = bma400_get_sensor_conf(conf, 2, &bma);
	print_rslt(rslt);

	conf[0].param.accel.odr = BMA400_ODR_200HZ;
	conf[0].param.accel.range = BMA400_4G_RANGE;
	conf[0].param.accel.data_src = BMA400_DATA_SRC_ACCEL_FILT_1;
	conf[0].param.accel.filt1_bw = BMA400_ACCEL_FILT1_BW_1;

	conf[1].param.tap.int_chan = BMA400_UNMAP_INT_PIN;
	conf[1].param.tap.axes_sel = BMA400_Z_AXIS_EN_TAP;
	conf[1].param.tap.sensitivity = BMA400_TAP_SENSITIVITY_0;

	rslt = bma400_set_sensor_conf(conf, 2, &bma);
	print_rslt(rslt);

	bma.delay_ms(100);

	tap_int[0].type = BMA400_SINGLE_TAP_INT_EN;
	tap_int[0].conf = BMA400_ENABLE;

	tap_int[1].type = BMA400_DOUBLE_TAP_INT_EN;
	tap_int[1].conf = BMA400_ENABLE;

	rslt = bma400_enable_interrupt(tap_int, 2, &bma);
	print_rslt(rslt);

	bma.delay_ms(100);

	rslt = bma400_set_power_mode(BMA400_NORMAL_MODE, &bma);
	print_rslt(rslt);

	bma.delay_ms(100);

	if (rslt == BMA400_OK) {
		printf("Tap configured.\r\n");

		while (test_dur_ms) {
			bma.delay_ms(poll_period);