/**
* Copyright (c) 2017 - 2019, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, 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.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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*/
#include "bh1745.h"
#define BH1745_SENSOR_WRITE(p_instance, msg) \
nrf_twi_sensor_write(p_instance->p_sensor_data, \
p_instance->sensor_addr, \
msg, \
ARRAY_SIZE(msg), \
true)
ret_code_t bh1745_init(bh1745_instance_t * p_instance)
{
ASSERT(p_instance != NULL);
if (p_instance->p_sensor_data->p_twi_mngr->p_queue->size < BH1745_MIN_QUEUE_SIZE)
{
return NRF_ERROR_INVALID_LENGTH;
}
static const uint8_t msg1[] = {
BH1745_REG_MODE_CONTROL1,
0x00,
0x00,
0x00
};
ret_code_t err = BH1745_SENSOR_WRITE(p_instance, msg1);
if (err != NRF_SUCCESS)
{
return err;
}
static const uint8_t msg2[] = {
BH1745_REG_INTERRUPT,
0x00,
0x01,
0xFF,
0xFF,
0x00,
0x00
};
return BH1745_SENSOR_WRITE(p_instance, msg2);
}
ret_code_t bh1745_sw_reset(bh1745_instance_t * p_instance)
{
ASSERT(p_instance != NULL);
static const uint8_t send_msg[] = {
BH1745_REG_SYSTEM_CONTROL,
BH1745_SW_RESET_MASK
};
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}
ret_code_t bh1745_int_reset(bh1745_instance_t * p_instance)
{
ASSERT(p_instance != NULL);
static const uint8_t send_msg[] = {
BH1745_REG_SYSTEM_CONTROL,
BH1745_INT_RESET_MASK
};
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}
ret_code_t bh1745_meas_cfg(bh1745_instance_t * p_instance,
bh1745_meas_time_t meas_time,
bool enable,
bh1745_gain_t gain)
{
ASSERT(p_instance != NULL);
if (meas_time > BH1745_MEAS_TIME_5120MS)
{
meas_time = BH1745_MEAS_TIME_5120MS;
}
if (gain > BH1745_GAIN_16X)
{
gain = BH1745_GAIN_16X;
}
uint8_t send_msg[] = {
BH1745_REG_MODE_CONTROL1,
0,
0,
0x02
};
NRF_TWI_SENSOR_REG_SET(send_msg[1], BH1745_MEAS_TIME_MASK, BH1745_MEAS_TIME_POS, meas_time);
NRF_TWI_SENSOR_REG_SET(send_msg[2], BH1745_RGBC_EN_MASK, BH1745_RGBC_EN_POS, enable);
NRF_TWI_SENSOR_REG_SET(send_msg[2], BH1745_ADC_GAIN_MASK, BH1745_ADC_GAIN_POS, gain);
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}
ret_code_t bh1745_data_read(bh1745_instance_t * p_instance,
bh1745_data_callback_t user_callback,
bh1745_data_t * p_data)
{
ASSERT(p_instance != NULL);
ASSERT(p_data != NULL);
ret_code_t err_code;
err_code = nrf_twi_sensor_reg_read(p_instance->p_sensor_data,
p_instance->sensor_addr,
BH1745_REG_MODE_CONTROL2,
NULL,
&p_data->valid,
1);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
err_code = nrf_twi_sensor_reg_read(p_instance->p_sensor_data,
p_instance->sensor_addr,
BH1745_REG_RED_DATA_LSB,
(nrf_twi_sensor_reg_cb_t) user_callback,
(uint8_t *) &p_data->red,
BH1745_DATA_REG_NUM);
return err_code;
}
ret_code_t bh1745_int_cfg(bh1745_instance_t * p_instance,
bool latch,
bh1745_int_source_t source,
bool enable,
bh1745_persistence_t persistance)
{
ASSERT(p_instance != NULL);
uint8_t int_reg = 0;
NRF_TWI_SENSOR_REG_SET(int_reg, BH1745_INT_ENABLE_MASK, BH1745_INT_ENABLE_POS, enable);
NRF_TWI_SENSOR_REG_SET(int_reg, BH1745_INT_SOURCE_MASK, BH1745_INT_SOURCE_POS, source);
NRF_TWI_SENSOR_REG_SET(int_reg, BH1745_INT_LATCH_MASK, BH1745_INT_LATCH_POS, latch);
uint8_t send_msg[] = {
BH1745_REG_INTERRUPT,
int_reg,
persistance
};
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}
ret_code_t bh1745_high_thr_set(bh1745_instance_t * p_instance,
uint16_t threshold)
{
ASSERT(p_instance != NULL);
uint8_t send_msg[] = {
BH1745_REG_TH_LSB,
LSB_16(threshold),
MSB_16(threshold)
};
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}
ret_code_t bh1745_low_thr_set(bh1745_instance_t * p_instance,
uint16_t threshold)
{
ASSERT(p_instance != NULL);
uint8_t send_msg[] = {
BH1745_REG_TL_LSB,
LSB_16(threshold),
MSB_16(threshold)
};
return BH1745_SENSOR_WRITE(p_instance, send_msg);
}