/**************************************************************************//**
* @brief
* Initializes and configures the Si1147 sensor.
* @param[in] i2c
* The I2C peripheral to use (not used).
* @param[in] addr
* The I2C address of the sensor.
* @param[in] lowpower
* Set to 1 to initialize without autonomous mode (low power) or set to 0
* to enable autonomous mode.
* @return
* Returns 0 on success.
*****************************************************************************/
int Si1147_ConfigureDetection(I2C_TypeDef *i2c, uint8_t addr, int lowpower)
{
s16 retval = 0;
SI114X_CAL_S si114x_cal;
si114x_handle->addr = addr;
si114x_handle->i2c = i2c;
/* Note that the Si114xReset() actually performs the following functions: */
/* 1. Pauses all prior measurements */
/* 2. Clear i2c registers that need to be cleared */
/* 3. Clears irq status to make sure INT* is negated */
/* 4. Delays 10 ms */
/* 5. Sends HW Key */
retval += Si114xReset(si114x_handle);
retval += Si114xWriteToRegister(si114x_handle, REG_PS_LED21, (LED1I << 4) + LED2I);
retval += Si114xWriteToRegister(si114x_handle, REG_PS_LED3, LED3I);
/* UV Coefficients */
si114x_get_calibration(si114x_handle, &si114x_cal, 1);
si114x_set_ucoef(si114x_handle, 0, &si114x_cal);
retval += Si114xParamSet(si114x_handle, PARAM_CH_LIST, GESTURE_TASKLIST | UV_TASKLIST);
retval += Si114xWriteToRegister(si114x_handle, REG_IRQ_ENABLE, GESTURE_IRQ);
retval += Si114xParamSet(si114x_handle, PARAM_PS_ADC_MISC, 0x24); /* PS_ADC_MISC to high signal range */
retval += Si114xParamSet(si114x_handle, PARAM_PS1_ADC_MUX, 0x00); /* PS1_ADCMUX, PS2_ADCMUX, PS3_ADCMUX to small photodiode */
retval += Si114xParamSet(si114x_handle, PARAM_PS2_ADC_MUX, 0x00);
retval += Si114xParamSet(si114x_handle, PARAM_PS3_ADC_MUX, 0x00);
/* Configure the ALS IR channel for the same settings as PS */
retval += Si114xParamSet(si114x_handle, PARAM_ALSIR_ADC_MISC, RANGE_EN);
retval += Si114xParamSet(si114x_handle, PARAM_ALSVIS_ADC_MISC, RANGE_EN);
if (!lowpower)
{
/* Set up how often the device wakes up to make measurements (10ms) */
retval += Si114xWriteToRegister(si114x_handle, REG_MEAS_RATE_MSB, (MEASRATE_FAST & 0xff00) >> 8);
retval += Si114xWriteToRegister(si114x_handle, REG_MEAS_RATE_LSB, MEASRATE_FAST & 0x00ff);
/* Enable Autonomous Operation */
retval += Si114xPsAlsAuto(si114x_handle);
}
/**************************************************************************//**
* @brief
* Initializes and configures the Si1146 sensor for UV index measurements.
* @param[in] fullInit
* The I2C peripheral to use (not used).
* @param[in] handle
* The si114x handle for programmer's toolkit
* @return
* Returns 0 on success.
*****************************************************************************/
int Si114x_ConfigureUV(int fullInit, HANDLE *handle)
{
s16 retval = 0;
SI114X_CAL_S si114x_cal;
/* Set handle */
si114x_handle = *handle;
/* Note that the Si114xReset() actually performs the following functions: */
/* 1. Pauses all prior measurements */
/* 2. Clear i2c registers that need to be cleared */
/* 3. Clears irq status to make sure INT* is negated */
/* 4. Delays 10 ms */
/* 5. Sends HW Key */
if (fullInit)
retval += Si114xReset(si114x_handle);
/* UV Coefficients */
si114x_get_calibration(si114x_handle, &si114x_cal, 0);
si114x_set_ucoef(si114x_handle, 0, &si114x_cal);
if (fullInit)
{
retval += Si114xParamSet(si114x_handle, PARAM_CH_LIST, UV_TASKLIST);
retval += Si114xWriteToRegister(si114x_handle, REG_IRQ_ENABLE, IE_ALS_EVRYSAMPLE);
retval += Si114xParamSet(si114x_handle, PARAM_PS_ADC_MISC, 0x24); /* PS_ADC_MISC to high signal range */
retval += Si114xParamSet(si114x_handle, PARAM_PS1_ADC_MUX, 0x00); /* PS1_ADCMUX, PS2_ADCMUX, PS3_ADCMUX to small photodiode */
retval += Si114xParamSet(si114x_handle, PARAM_PS2_ADC_MUX, 0x00);
retval += Si114xParamSet(si114x_handle, PARAM_PS3_ADC_MUX, 0x00);
}
/* Configure the ALS IR channel for the same settings as PS */
retval += Si114xParamSet(si114x_handle, PARAM_ALSIR_ADC_MISC, RANGE_EN);
retval += Si114xParamSet(si114x_handle, PARAM_ALSVIS_ADC_MISC, RANGE_EN);
/* If nothing went wrong after all of this time, the value */
/* returned will be 0. Otherwise, it will be some negative */
/* number */
return retval;
}
