/**************************************************************************//**
* @brief
* Set the VIS_RANGE bit of the optical sensor
* Si114x.
* @param[in] vis_range_bit
* the boolean value to set the bit to
* @return
* Returns 0.
*****************************************************************************/
int Si114x_EnableVisRange(int vis_range_bit)
{ s16 retval = 0;
if( vis_range_bit == 1 )
retval += Si114xParamSet(si114x_handle, PARAM_ALSVIS_ADC_MISC, RANGE_EN);
else
retval += Si114xParamSet(si114x_handle, PARAM_ALSVIS_ADC_MISC, 0);
return retval;
}
/**************************************************************************//**
* @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;
}
int main()
{
// variable declarations
int usr_sel;
int s16_current = 0x0bbb;
int s16_tasklist = -1;
int s16_measrate = 0x84;
int gest_cnt = 0;
s16 SI114x_ret_val = -1;
u8 SI114x_write_val;
u8 SI114x_ret_val_array[8];
u8* SI114x_ptr = &SI114x_ret_val_array;
// data structure declarations
SI114X_IRQ_SAMPLE samples;
gesture_t gest = NONE;
HANDLE si114x_handle;
si114x_handle = 0;
// main program
printf("\nGesture Sensor program starting... Please wait...\n\n");
// initializing the I2C bus @ addr = I2C_OPENCORES_0_BASE
printf("Initializing I2C bus...\n");
I2C_init(I2C_OPENCORES_0_BASE, (alt_32) 50000000, (alt_32) 200000);
// reset the Si1143 Gesture IC
printf("Resetting Si1143 Gesture Sensor...\n");
SI114x_ret_val = Si114xReset(si114x_handle);
if ( SI114x_ret_val != 0 ) // if reset is successful...
{
printf("Si1143 Reset completed successfully!\n");
// set IR LED current values to a default level
printf("Setting LED current values...\n");
u8 i21, i3;
i21 = 0xbb; // current = LEDI_202;
i3 = 0x0b;
SI114x_ret_val+=Si114xWriteToRegister(si114x_handle, REG_PS_LED21, i21);
SI114x_ret_val+=Si114xWriteToRegister(si114x_handle, REG_PS_LED3 , i3);
}
else // if reset fails, exit
{
printf("Si1143 Reset failed... Exiting...\n");
return -1;
}
// gesture recognition loop
printf("Entering main loop...\n Loop exits after 32 gestures are recognized.\n");
// have Si1143 measure all three proximity channels, the visual channel, and the IR channel
s16_tasklist = PS1_TASK + PS2_TASK + PS3_TASK + ALS_VIS_TASK + ALS_IR_TASK;
SI114x_ret_val+=Si114xParamSet(si114x_handle, PARAM_CH_LIST, s16_tasklist);
while ( gest_cnt <= 32 ){
// make measurement
SI114x_ret_val = Si114xPsAlsForce(si114x_handle);
//usleep(10000); // uncomment if you need a pause in measurements
if ( SI114x_ret_val > 0 ){ // if measurement is successful...
// retrieve data from sensor and put it in struct "samples"
DECA_si1143_irq_pop(si114x_handle, &samples);
// process data in gesture algorithm
gest = ProcessSi1143Samples(&samples);
// report the gesture and increment counter
if ( gest != NONE ) gest_cnt++;
if ( gest == UP ) printf("UP swipe detected!\n");
if ( gest == DOWN ) printf("DOWN swipe detected!\n");
if ( gest == LEFT ) printf("LEFT swipe detected!\n");
if ( gest == RIGHT ) printf("RIGHT swipe detected!\n");
if ( gest == TAP ) printf("TAP detected!\n");
}
else printf("Unable to force measurement...\n");
}
return 0;
}
