hh10d.h

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/* Copyright 2014, Peter A. Bigot
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the software nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 */

#ifndef BSP430_SENSORS_HH10D_H
#define BSP430_SENSORS_HH10D_H

#include <bsp430/serial.h>
#include <bsp430/periph/timer.h>

#define BSP430_SENSORS_HH10D_I2C_ADDRESS 0x51

#define BSP430_SENSORS_HH10D_FLAG_VALID_CAPTURE 0x01

#define BSP430_SENSORS_HH10D_FLAG_VALID_COUNT 0x02

#define BSP430_SENSORS_HH10D_FLAG_WAKE_ON_COUNT 0x04

#define BSP430_SENSORS_HH10D_FLAG_AUTOSAMPLE 0x08

typedef struct sBSP430sensorsHH10Dstate {
  sBSP430halISRIndexedChainNode cb;

  unsigned int cal_offs;

  unsigned int cal_sens;

  volatile sBSP430hplTIMER * freq_timer;

  unsigned int interval_tck;

  unsigned int last_capture;

  unsigned int last_period_count;

  unsigned int flags;
} sBSP430sensorsHH10Dstate;

typedef sBSP430sensorsHH10Dstate * hBSP430sensorsHH10Dstate;

int iBSP430sensorsHH10DperiodicCallback_ni (const struct sBSP430halISRIndexedChainNode *cb,
                                            void *context,
                                            int idx);

int iBSP430sensorsHH10DgetCalibration (hBSP430halSERIAL i2c,
                                       hBSP430sensorsHH10Dstate hh10d);

static BSP430_CORE_INLINE
int iBSP430sensorsHH10Dconvert_ppth_ni (hBSP430sensorsHH10Dstate hh10d,
                                        unsigned int interval_s)
{
  unsigned long ul;

  if (! hh10d) {
    return -1;
  }
  if (! (BSP430_SENSORS_HH10D_FLAG_VALID_COUNT & hh10d->flags)) {
    return -1;
  }
  ul = hh10d->last_period_count / interval_s;
  ul = hh10d->cal_offs - ul;
  ul *= 10UL * hh10d->cal_sens;
  return (unsigned int) (ul / 4096);
}

#endif /* BSP430_SENSORS_HH10D_H */