int Si1147_MeasureUVAndObjectPresent(I2C_TypeDef *i2c, uint8_t addr, uint16_t *uvIndex, int *objectDetect)
{
uint16_t data;
int retval = 0;
int gestureMode;
*objectDetect = 0;
si114x_handle->addr = addr;
si114x_handle->i2c = i2c;
Si1147_GetInterruptOutputEnable(i2c,addr,&gestureMode);
if ( !gestureMode ) /* Force only if not already running swipe detection. */
{
Si114xPsAlsForce(si114x_handle);
while ((Si114xReadFromRegister(si114x_handle, REG_IRQ_STATUS) & 1) == 0)
; /*wait for measurement data */
}
data = Si114xReadFromRegister(si114x_handle, REG_AUX_DATA0); /*read sample data from si114x */
data |= Si114xReadFromRegister(si114x_handle, REG_AUX_DATA1) << 8;
/*round to nearest*/
*uvIndex = data + 50;
*uvIndex /= 100;
if ( !gestureMode ) /* Check for object only if not already running swipe detection. */
{
data = Si114xReadFromRegister(si114x_handle, REG_PS1_DATA0); /*read sample data from si114x */
data |= Si114xReadFromRegister(si114x_handle, REG_PS1_DATA1) << 8;
if (data > PS_HOVER_THRESHOLD)
{
*objectDetect = 1;
}
}
/*clear irq*/
Si114xWriteToRegister(si114x_handle, REG_IRQ_STATUS, 0xff);
return retval;
}
/**************************************************************************//**
* @brief
* Reads the UV index measurement data from the
* Si114x.
* @param[out] uvIndex
* The UV index read from the sensor
* @return
* Returns 0.
*****************************************************************************/
int Si114x_MeasureUVIndex(u16 *uvIndex)
{
u16 data;
volatile u8 regval;
int retval = 0;
Si114xPsAlsForce(si114x_handle);
regval = Si114xReadFromRegister(si114x_handle, REG_AUX_DATA0); /*read sample data from si114x */
data = regval;
regval = Si114xReadFromRegister(si114x_handle, REG_AUX_DATA1);
data |= regval << 8;
//check for saturation after the forced measurement and clear it if found
//otherwise the next si114x cmd will not be performed. Also this must be
//done after reading the AUX_DATA register
regval = Si114xReadFromRegister(si114x_handle, REG_RESPONSE);
while((regval & 0x80) != 0) //response == 0x8x means saturation occured
{ // Send the NOP Command to clear the error...we cannot use Si114xNop()
// because it first checks if REG_RESPONSE < 0 and if so it does not
// perform the cmd. Since we have a saturation REG_RESPONSE will be <0
Si114xWriteToRegister(si114x_handle, REG_COMMAND, 0x00);
regval = Si114xReadFromRegister(si114x_handle, REG_RESPONSE);
}
/*round to nearest*/
*uvIndex = data + 50;
*uvIndex /= 100;
/*clear irq*/
if(*uvIndex > 10)
*uvIndex = data + 50;
Si114xWriteToRegister(si114x_handle, REG_IRQ_STATUS, 0xff);
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;
}