mma7660.h

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/*
 * Copyright (C) 2016 University of California, Berkeley
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once
 
#include <stdint.h>
#include <stdbool.h>
#include "periph/i2c.h"
 
#ifdef __cplusplus
extern "C"
{
#endif
 
enum {
    MMA7660_OK,               
    MMA7660_I2C_ERR,          
    MMA7660_I2C_READ_ERR,     
    MMA7660_I2C_WRITE_ERR,    
    MMA7660_READ_ERR,         
};
 
typedef struct
{
    i2c_t i2c;                
    uint8_t addr;             
    uint8_t amsr;             
    uint8_t awsr;             
    uint8_t filt;             
} mma7660_params_t;
 
typedef struct
{
    mma7660_params_t params;  
} mma7660_t;
 
typedef struct {
    int16_t x;                  
    int16_t y;                  
    int16_t z;                  
} mma7660_data_t;
 
#define MODE_ACTIVE_SHIFT             (0U)
#define MODE_AUTOWAKE_SHIFT           (3U)
#define MODE_AUTOSLEEP_SHIFT          (4U)
#define MODE_PRESCALE_SHIFT           (5U)
#define MODE_INTERRUPT_DEFAULT        (0x40) /* Active low, push-pull */
 
#define MMA7660_INTSOURCE_NONE        (0x00)
#define MMA7660_INTSOURCE_FB          (0x01)
#define MMA7660_INTSOURCE_UDLR        (0x02)
#define MMA7660_INTSOURCE_TAP         (0x04)
#define MMA7660_INTSOURCE_AUTOSLEEP   (0x08)
#define MMA7660_INTSOURCE_MEASURE     (0x10)
#define MMA7660_INTSOURCE_SHX         (0x20)
#define MMA7660_INTSOURCE_SHY         (0x40)
#define MMA7660_INTSOURCE_SHZ         (0x80)
 
#define MMA7660_SR_AMPD               (0x00)
#define MMA7660_SR_AM64               (0x01)
#define MMA7660_SR_AM32               (0x02)
#define MMA7660_SR_AM16               (0x03)
#define MMA7660_SR_AM8                (0x04)
#define MMA7660_SR_AM4                (0x05)
#define MMA7660_SR_AM2                (0x06)
#define MMA7660_SR_AM1                (0x07)
#define MMA7660_SR_AW32               (0x00)
#define MMA7660_SR_AW16               (0x08)
#define MMA7660_SR_AW8                (0x10)
#define MMA7660_SR_AW1                (0x18)
#define MMA7660_PDET_X                (0x20)
#define MMA7660_PDET_Y                (0x40)
#define MMA7660_PDET_Z                (0x80)
 
#define MMA7660_ADDR                  (0x4C)
 
/* This is actually 46.9 but the sensor is not accurate enough
 * for that to matter
 */
#define MMA7660_MG_PER_COUNT          (47U)
int mma7660_init(mma7660_t *dev, const mma7660_params_t *params);
 
int mma7660_set_mode(const mma7660_t *dev, uint8_t active,
                     uint8_t autowake, uint8_t autosleep, uint8_t prescale);
 
int mma7660_read_tilt(const mma7660_t *dev, uint8_t *res);
 
int mma7660_write_sleep_count(const mma7660_t *dev, uint8_t sleep);
 
int mma7660_config_interrupts(const mma7660_t *dev, uint8_t isource_flags);
 
int mma7660_config_samplerate(const mma7660_t *dev, uint8_t amsr, uint8_t awsr, uint8_t filt);
 
int mma7660_config_pdet(const mma7660_t *dev, uint8_t pdth, uint8_t enabled_axes);
 
int mma7660_config_pd(const mma7660_t *dev, uint8_t pd) ;
 
int mma7660_read(const mma7660_t *dev, mma7660_data_t *data);
 
int mma7660_read_counts(const mma7660_t *dev, int8_t *x, int8_t *y, int8_t *z);
 
#ifdef __cplusplus
}
#endif