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APDS-9960_lib.c
1864 lines (1514 loc) · 50.9 KB
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APDS-9960_lib.c
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/*
*/
#include <asf.h>
#include "APDS-9960_lib.h"
/**
* \brief Driver version
*/
#define APDS_9660_DRIVER_VERSION 0x00000001u
#define CONF_I2C_MASTER_MODULE SERCOM2
struct i2c_master_module i2c_master_instance;
/**
* \brief Private functions
*/
int32_t APDS_9660_read_RegisterMultiValue( struct i2c_master_module*module, uint8_t reg, uint8_t *value, const uint16_t n);
int32_t APDS_9660_write_RegisterMultiValue( struct i2c_master_module*module, uint8_t*value, const uint16_t n);
uint32_t APDS_9660_Init_Done=0;
struct i2c_master_packet packet;
void APDS_9660_configure_i2c_master(void);
/* Members */
Gesture_Data_Type GD;
int32_t gesture_ud_delta_;
int32_t gesture_lr_delta_;
int32_t gesture_ud_count_;
int32_t gesture_lr_count_;
int32_t gesture_near_count_;
int32_t gesture_far_count_;
int32_t gesture_state_;
int32_t gesture_motion_;
void APDS_9660_configure_i2c_master(void)
{
/* Initialize config structure and software module. */
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
/* Change buffer timeout to something longer. */
config_i2c_master.buffer_timeout = 10000;
/* Initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, CONF_I2C_MASTER_MODULE, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
}
uint32_t APDS_9660_Init( void)
{
uint8_t id;
uint8_t val[2];
APDS_9660_configure_i2c_master();
// id=I2CreadByte(APDS9960_I2C_ADDR, APDS9960_ID);
APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_ID, &id, 1);
if( (!(id == APDS9960_ID_1 || id == APDS9960_ID_2))||id==ERROR) return 1;
if(APDS_9660_SetMode(ALL, OFF)) return 1;
val[0]=APDS9960_ATIME;
val[1]=DEFAULT_ATIME;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_WTIME;
val[1]=DEFAULT_WTIME;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_PPULSE;
val[1]=DEFAULT_PROX_PPULSE;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_POFFSET_UR;
val[1]=DEFAULT_POFFSET_UR;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_POFFSET_DL;
val[1]=DEFAULT_POFFSET_DL;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_CONFIG1;
val[1]=DEFAULT_CONFIG1;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
if( APDS_9660_SetLEDDrive( DEFAULT_LDRIVE) ) return 1;
if( APDS_9660_SetProximityGain( DEFAULT_PGAIN) ) return 1;
if( APDS_9660_SetAmbientLightGain( DEFAULT_AGAIN) ) return 1;
if( APDS_9660_SetProxIntLowThresh( DEFAULT_PILT) ) return 1;
if( APDS_9660_SetProxIntHighThresh( DEFAULT_PIHT) ) return 1;
if( APDS_9660_SetLightIntLowThreshold( DEFAULT_AILT) ) return 1;
val[0]=APDS9960_CONFIG2;
val[1]=DEFAULT_CONFIG2;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_CONFIG3;
val[1]=DEFAULT_CONFIG3;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
if( APDS_9660_SetGestureEnterThresh(DEFAULT_GPENTH) ) return 1;
if( APDS_9660_SetGestureExitThresh(DEFAULT_GEXTH) ) return 1;
val[0]=APDS9960_GCONF1;
val[1]=DEFAULT_GCONF1;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
if( APDS_9660_SetGestureGain( DEFAULT_GGAIN) ) return 1;
if( APDS_9660_SetGestureLEDDrive( DEFAULT_GLDRIVE) ) return 1;
if( APDS_9660_SetGestureWaitTime( DEFAULT_GWTIME) ) return 1;
val[0]=APDS9960_GOFFSET_U;
val[1]=DEFAULT_GOFFSET;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_GOFFSET_D;
val[1]=DEFAULT_GOFFSET;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_GOFFSET_L;
val[1]=DEFAULT_GOFFSET;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_GOFFSET_R;
val[1]=DEFAULT_GOFFSET;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_GPULSE;
val[1]=DEFAULT_GPULSE;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_GCONF3;
val[1]=DEFAULT_GCONF3;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
if( APDS_9660_SetGestureIntEnable( DEFAULT_GIEN) ) return 1;
APDS_9660_Init_Done=1;
return 0;
}
/**
* @brief Enables or disables a feature in the APDS-9960
*
* @param[in] mode which feature to enable
* @param[in] enable ON (1) or OFF (0)
* @return 0 if operation success. 1 otherwise.
*/
uint32_t APDS_9660_SetMode(uint8_t mode, uint8_t enable)
{
uint8_t reg_val;
uint8_t val[2];
/* Read current ENABLE register */
if ( APDS_9660_GetMode( ®_val)) return 1;
/* Change bit(s) in ENABLE register */
enable = enable & 0x01;
if( mode >= 0 && mode <= 6 ) {
if (enable) {
reg_val |= (1 << mode);
} else {
reg_val &= ~(1 << mode);
}
} else if( mode == ALL ) {
if (enable) {
reg_val = 0x7F;
} else {
reg_val = 0x00;
}
}
val[0]=APDS9960_ENABLE;
val[1]=reg_val;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
return 0;
}
uint32_t APDS_9660_GetMode( uint8_t*mode)
{
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_ENABLE, mode, 1)) return 1;
return 0;
}
uint32_t APDS_9660_EnableLightSensor(uint8_t interrupts)
{
/* Set default gain, interrupts, enable power, and enable sensor */
if( APDS_9660_SetAmbientLightGain(DEFAULT_AGAIN) ) return 1;
if( interrupts ) {
if( APDS_9660_SetAmbientLightIntEnable(1) )
return 1;
} else {
if( APDS_9660_SetAmbientLightIntEnable(0) )
return 1;
}
if( APDS_9660_EnablePower() ) return 1;
if( APDS_9660_SetMode(AMBIENT_LIGHT, 1)) return 1;
return 0;
}
/**
* @brief Ends the light sensor on the APDS-9960
*
* @return 0 if sensor disabled correctly. 1 on error.
*/
uint32_t APDS_9660_DisableLightSensor( void)
{
if( APDS_9660_SetAmbientLightIntEnable(0) ) {
return 1;
}
if( APDS_9660_SetMode(AMBIENT_LIGHT, 0) ) {
return 1;
}
return 0;
}
/**
* @brief Starts the proximity sensor on the APDS-9960
*
* @param[in] interrupts true to enable hardware external interrupt on proximity
* @return 0 if sensor enabled correctly. 1 on error.
*/
uint32_t APDS_9660_EnableProximitySensor(uint8_t interrupts)
{
/* Set default gain, LED, interrupts, enable power, and enable sensor */
if( APDS_9660_SetProximityGain(DEFAULT_PGAIN) ) return 1;
if( APDS_9660_SetLEDDrive(DEFAULT_LDRIVE) ) return 1;
if( interrupts ) {
if( APDS_9660_SetProximityIntEnable(1) ) {
return 1;
}
} else {
if( APDS_9660_SetProximityIntEnable(0) ) {
return 1;
}
}
if( APDS_9660_EnablePower() ) return 1;
if( APDS_9660_SetMode(PROXIMITY, 1) ) return 1;
return 0;
}
/**
* @brief Ends the proximity sensor on the APDS-9960
*
* @return 0 if sensor disabled correctly. 1 on error.
*/
uint32_t APDS_9660_DisableProximitySensor( void)
{
if( APDS_9660_SetProximityIntEnable(0) ) return 1;
if( APDS_9660_SetMode(PROXIMITY, 0) ) return 1;
return 0;
}
/**
* @brief Starts the gesture recognition engine on the APDS-9960
*
* @param[in] interrupts true to enable hardware external interrupt on gesture
* @return 0 if engine enabled correctly. 1 on error.
*/
uint32_t APDS_9660_EnableGestureSensor(uint8_t interrupts)
{
uint8_t val[2];
/* Enable gesture mode
Set ENABLE to 0 (power off)
Set WTIME to 0xFF
Set AUX to LED_BOOST_300
Enable PON, WEN, PEN, GEN in ENABLE
*/
APDS_9660_ResetGestureParameters();
val[0]=APDS9960_WTIME;
val[1]=0xFF;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
val[0]=APDS9960_PPULSE;
val[1]=DEFAULT_GESTURE_PPULSE;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
if( APDS_9660_SetLEDBoost(LED_BOOST_300) ) return 1;
if( interrupts ) {
if( APDS_9660_SetGestureIntEnable(1) ) {
return 1;
}
} else {
if( APDS_9660_SetGestureIntEnable(0) ) {
return 1;
}
}
if( APDS_9660_SetGestureMode(1) ) return 1;
if( APDS_9660_EnablePower() ) return 1;
if( APDS_9660_SetMode(WAIT, 1) ) return 1;
if( APDS_9660_SetMode(PROXIMITY, 1) ) return 1;
if( APDS_9660_SetMode(GESTURE, 1) ) return 1;
return 0;
}
/**
* @brief Ends the gesture recognition engine on the APDS-9960
*
* @return 0 if engine disabled correctly. 1 on error.
*/
uint32_t APDS_9660_DisableGestureSensor( void)
{
APDS_9660_ResetGestureParameters();
if( APDS_9660_SetGestureIntEnable(0) ) return 1;
if( APDS_9660_SetGestureMode(0) ) return 1;
if( APDS_9660_SetMode(GESTURE, 0) ) return 1;
return 0;
}
/**
* @brief Determines if there is a gesture available for reading
*
* @param[out] 1 if gesture available. 0 otherwise.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_IsGestureAvailable( uint8_t*gest)
{
uint8_t val;
/* Read value from GSTATUS register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GSTATUS, &val, 1)) return 1;
/* Shift and mask out GVALID bit */
val &= APDS9960_GVALID;
*gest=val;
return 0;
}
int32_t APDS_9660_ReadGesture( uint8_t*dir)
{
uint8_t fifo_level = 0;
uint8_t fifo_data[128];
char *fptr;
fptr= fifo_data;
uint8_t gstatus;
uint8_t mode, gesture;
int motion;
int i;
/* Make sure that power and gesture is on and data is valid */
if ( APDS_9660_GetMode(&mode)) return 1;
if ( APDS_9660_IsGestureAvailable(&gesture)) return 1;
if( !gesture || !( mode & 0x41) ) {
*dir= DIR_NONE;
return 0;
}
/* Keep looping as long as gesture data is valid */
while(1) {
/* Wait some time to collect next batch of FIFO data */
delay_ms(FIFO_PAUSE_TIME);
/* Get the contents of the STATUS register. Is data still valid? */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GSTATUS, &gstatus, 1)) return 1;
/* If we have valid data, read in FIFO */
if( (gstatus & APDS9960_GVALID) == APDS9960_GVALID ) {
/* Read the current FIFO level */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GFLVL, &fifo_level, 1)) return 1;
/* If there's stuff in the FIFO, read it into our data block */ //NEED TO FIGURE OUT WHAT THIS IS DOING.
if( fifo_level > 0) {
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GFIFO_U, &fifo_data[0], (fifo_level * 4))) return 1;
/* If at least 1 set of data, sort the data into U/D/L/R */
if((fifo_level * 4) >= 4 ) {
for( i = 0; i < (fifo_level * 4); i += 4 ) {
GD.u_data[GD.sindex] = fifo_data[i + 0];
GD.d_data[GD.sindex] = fifo_data[i + 1];
GD.l_data[GD.sindex] = fifo_data[i + 2];
GD.r_data[GD.sindex] = fifo_data[i + 3];
GD.sindex++;
GD.total_gestures++;
}
/* Filter and process gesture data. Decode near/far state */
APDS_9660_ProcessGestureData();
APDS_9660_DecodeGesture();
/* Reset data */
GD.sindex = 0;
GD.total_gestures = 0;
}
}
} else {
/* Determine best guessed gesture and clean up */
delay_ms(FIFO_PAUSE_TIME);
APDS_9660_DecodeGesture();
motion = gesture_motion_;
APDS_9660_ResetGestureParameters();
*dir=motion;
return 0;
}
} // while(1)...
//
return 0;
}
/**
* Turn the APDS-9960 on
*
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_EnablePower( void)
{
if( APDS_9660_SetMode(POWER, 1) ) return 1;
return 0;
}
/**
* Turn the APDS-9960 off
*
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_DisablePower( void)
{
if( APDS_9660_SetMode(POWER, 0) ) return 1;
return 0;
}
/*******************************************************************************
* Ambient light and color sensor controls
******************************************************************************/
/**
* @brief Reads the ambient (clear) light level as a 16-bit value
*
* @param[out] val value of the light sensor.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_ReadAmbientLight(uint16_t*val)
{
uint8_t val_byte[2];
/* Read value from clear channel, low byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CDATAL, &val_byte[0], 1)) return 1;
/* Read value from clear channel, high byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CDATAH, &val_byte[1], 1)) return 1;
*val = (uint16_t)(val_byte[0] + (val_byte[1] << 8));
return 0;
}
/**
* @brief Reads the red light level as a 16-bit value
*
* @param[out] val value of the light sensor.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_ReadRedLight(uint16_t*val)
{
uint8_t val_byte[2];
// val = 0;
/* Read value from clear channel, low byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_RDATAL, &val_byte[0], 1)) return 1;
/* Read value from clear channel, high byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_RDATAH, &val_byte[1], 1)) return 1;
*val = (uint16_t)(val_byte[0] + (val_byte[1] << 8));
return 0;
}
/**
* @brief Reads the green light level as a 16-bit value
*
* @param[out] val value of the light sensor.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_ReadGreenLight(uint16_t*val)
{
uint8_t val_byte[2];
//val = 0;
/* Read value from clear channel, low byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GDATAL, &val_byte[0], 1)) return 1;
/* Read value from clear channel, high byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_GDATAH, &val_byte[1], 1)) return 1;
*val = (uint16_t)(val_byte[0] + (val_byte[1] << 8));
return 0;
}
/**
* @brief Reads the red light level as a 16-bit value
*
* @param[out] val value of the light sensor.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_ReadBlueLight(uint16_t*val)
{
uint8_t val_byte[2];
//val = 0;
/* Read value from clear channel, low byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_BDATAL, &val_byte[0], 1)) return 1;
/* Read value from clear channel, high byte register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_BDATAH, &val_byte[1], 1)) return 1;
*val = (uint16_t)(val_byte[0] + (val_byte[1] << 8));
return 0;
}
/*******************************************************************************
* Proximity sensor controls
******************************************************************************/
/**
* @brief Reads the proximity level as an 8-bit value
*
* @param[out] val value of the proximity sensor.
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_ReadProximity(uint8_t*val)
{
//val = 0;
/* Read value from proximity data register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_PDATA, val, 1)) return 1;
return 0;
}
/*******************************************************************************
* High-level gesture controls
******************************************************************************/
/**
* @brief Resets all the parameters in the gesture data member
*/
void APDS_9660_ResetGestureParameters( void)
{
GD.sindex = 0;
GD.total_gestures = 0;
gesture_ud_delta_ = 0;
gesture_lr_delta_ = 0;
gesture_ud_count_ = 0;
gesture_lr_count_ = 0;
gesture_near_count_ = 0;
gesture_far_count_ = 0;
gesture_state_ = 0;
gesture_motion_ = DIR_NONE;
}
uint32_t APDS_9660_ProcessGestureData( void)
{
uint8_t u_first = 0;
uint8_t d_first = 0;
uint8_t l_first = 0;
uint8_t r_first = 0;
uint8_t u_last = 0;
uint8_t d_last = 0;
uint8_t l_last = 0;
uint8_t r_last = 0;
int ud_ratio_first;
int lr_ratio_first;
int ud_ratio_last;
int lr_ratio_last;
int ud_delta;
int lr_delta;
int i;
/* If we have less than 4 total gestures, that's not enough */
if( GD.total_gestures <= 4 ) {
return false;
}
/* Check to make sure our data isn't out of bounds */
if( (GD.total_gestures <= 32) && \
(GD.total_gestures > 0) ) {
/* Find the first value in U/D/L/R above the threshold */
for( i = 0; i < GD.total_gestures; i++ ) {
if( (GD.u_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.d_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.l_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.r_data[i] > GESTURE_THRESHOLD_OUT) ) {
u_first = GD.u_data[i];
d_first = GD.d_data[i];
l_first = GD.l_data[i];
r_first = GD.r_data[i];
break;
}
}
/* If one of the _first values is 0, then there is no good data */
if( (u_first == 0) || (d_first == 0) || \
(l_first == 0) || (r_first == 0) ) {
return false;
}
/* Find the last value in U/D/L/R above the threshold */
for( i = GD.total_gestures - 1; i >= 0; i-- ) {
if( (GD.u_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.d_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.l_data[i] > GESTURE_THRESHOLD_OUT) &&
(GD.r_data[i] > GESTURE_THRESHOLD_OUT) ) {
u_last = GD.u_data[i];
d_last = GD.d_data[i];
l_last = GD.l_data[i];
r_last = GD.r_data[i];
break;
}
}
}
/* Calculate the first vs. last ratio of up/down and left/right */
ud_ratio_first = ((u_first - d_first) * 100) / (u_first + d_first);
lr_ratio_first = ((l_first - r_first) * 100) / (l_first + r_first);
ud_ratio_last = ((u_last - d_last) * 100) / (u_last + d_last);
lr_ratio_last = ((l_last - r_last) * 100) / (l_last + r_last);
/* Determine the difference between the first and last ratios */
ud_delta = ud_ratio_last - ud_ratio_first;
lr_delta = lr_ratio_last - lr_ratio_first;
/* Accumulate the UD and LR delta values */
gesture_ud_delta_ += ud_delta;
gesture_lr_delta_ += lr_delta;
/* Determine U/D gesture */
if( gesture_ud_delta_ >= GESTURE_SENSITIVITY_1 ) {
gesture_ud_count_ = 1;
} else if( gesture_ud_delta_ <= -GESTURE_SENSITIVITY_1 ) {
gesture_ud_count_ = -1;
} else {
gesture_ud_count_ = 0;
}
/* Determine L/R gesture */
if( gesture_lr_delta_ >= GESTURE_SENSITIVITY_1 ) {
gesture_lr_count_ = 1;
} else if( gesture_lr_delta_ <= -GESTURE_SENSITIVITY_1 ) {
gesture_lr_count_ = -1;
} else {
gesture_lr_count_ = 0;
}
/* Determine Near/Far gesture */
if( (gesture_ud_count_ == 0) && (gesture_lr_count_ == 0) ) {
if( (abs(ud_delta) < GESTURE_SENSITIVITY_2) && \
(abs(lr_delta) < GESTURE_SENSITIVITY_2) ) {
if( (ud_delta == 0) && (lr_delta == 0) ) {
gesture_near_count_++;
} else if( (ud_delta != 0) || (lr_delta != 0) ) {
gesture_far_count_++;
}
if( (gesture_near_count_ >= 10) && (gesture_far_count_ >= 2) ) {
if( (ud_delta == 0) && (lr_delta == 0) ) {
gesture_state_ = NEAR_STATE;
} else if( (ud_delta != 0) && (lr_delta != 0) ) {
gesture_state_ = FAR_STATE;
}
return true;
}
}
} else {
if( (abs(ud_delta) < GESTURE_SENSITIVITY_2) && \
(abs(lr_delta) < GESTURE_SENSITIVITY_2) ) {
if( (ud_delta == 0) && (lr_delta == 0) ) {
gesture_near_count_++;
}
if( gesture_near_count_ >= 5 ) {
gesture_ud_count_ = 0;
gesture_lr_count_ = 0;
gesture_ud_delta_ = 0;
gesture_lr_delta_ = 0;
}
}
}
return false;
}
/**
* @brief Determines swipe direction or near/far state
*
* @return 1 if near/far event. 0 otherwise.
*/
uint32_t APDS_9660_DecodeGesture( void)
{
/* Return if near or far event is detected */
if( gesture_state_ == NEAR_STATE ) {
gesture_motion_ = DIR_NEAR;
return 1;
} else if ( gesture_state_ == FAR_STATE ) {
gesture_motion_ = DIR_FAR;
return 1;
}
/* Determine swipe direction */
if( (gesture_ud_count_ == -1) && (gesture_lr_count_ == 0) ) {
gesture_motion_ = DIR_UP;
} else if( (gesture_ud_count_ == 1) && (gesture_lr_count_ == 0) ) {
gesture_motion_ = DIR_DOWN;
} else if( (gesture_ud_count_ == 0) && (gesture_lr_count_ == 1) ) {
gesture_motion_ = DIR_RIGHT;
} else if( (gesture_ud_count_ == 0) && (gesture_lr_count_ == -1) ) {
gesture_motion_ = DIR_LEFT;
} else if( (gesture_ud_count_ == -1) && (gesture_lr_count_ == 1) ) {
if( abs(gesture_ud_delta_) > abs(gesture_lr_delta_) ) {
gesture_motion_ = DIR_UP;
} else {
gesture_motion_ = DIR_RIGHT;
}
} else if( (gesture_ud_count_ == 1) && (gesture_lr_count_ == -1) ) {
if( abs(gesture_ud_delta_) > abs(gesture_lr_delta_) ) {
gesture_motion_ = DIR_DOWN;
} else {
gesture_motion_ = DIR_LEFT;
}
} else if( (gesture_ud_count_ == -1) && (gesture_lr_count_ == -1) ) {
if( abs(gesture_ud_delta_) > abs(gesture_lr_delta_) ) {
gesture_motion_ = DIR_UP;
} else {
gesture_motion_ = DIR_LEFT;
}
} else if( (gesture_ud_count_ == 1) && (gesture_lr_count_ == 1) ) {
if( abs(gesture_ud_delta_) > abs(gesture_lr_delta_) ) {
gesture_motion_ = DIR_DOWN;
} else {
gesture_motion_ = DIR_RIGHT;
}
} else {
return 0;
}
return 1;
}
/*******************************************************************************
* Getters and setters for register values
******************************************************************************/
/**
* @brief Returns the lower threshold for proximity detection
*
* @param[out] the lower proximity threshold
* @return 0 if operation successful. 1 otherwise.
*/
uint8_t APDS_9660_GetProxIntLowThresh( uint8_t*thrs)
{
//uint8_t val;
/* Read value from PILT register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_PILT, thrs, 1)) return 1;
return 0;
}
/**
* @brief Sets the lower threshold for proximity detection
*
* @param[in] threshold the lower proximity threshold
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_SetProxIntLowThresh(uint8_t threshold)
{
uint8_t val[2];
val[0] = APDS9960_PILT;
val[1] = threshold;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
return 0;
}
/**
* @brief Returns the high threshold for proximity detection
*
* @param[out] threshold the high proximity threshold
* @return 0 if operation successful. 1 otherwise.
*/
uint8_t APDS_9660_GetProxIntHighThresh( uint8_t*thrs)
{
/* Read value from PIHT register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_PILT, thrs, 1)) return 1;
return 0;
}
/**
* @brief Sets the high threshold for proximity detection
*
* @param[in] threshold the high proximity threshold
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_SetProxIntHighThresh(uint8_t threshold)
{
uint8_t val[2];
val[0] = APDS9960_PIHT;
val[1] = threshold;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
return 0;
}
/**
* @brief Returns LED drive strength for proximity and ALS
*
* Value LED Current
* 0 100 mA
* 1 50 mA
* 2 25 mA
* 3 12.5 mA
*
* @param[out] led drive current
* @return 0 if operation successful. 1 otherwise.
*
*/
uint8_t APDS_9660_GetLEDDrive( uint8_t*leddrv)
{
uint8_t val;
/* Read value from CONTROL register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CONTROL, &val, 1)) return 1;
/* Shift and mask out LED drive bits */
*leddrv = (val >> 6) & 0x03;//0b00000011;
return 0;
}
/**
* @brief Sets the LED drive strength for proximity and ALS
*
* Value LED Current
* 0 100 mA
* 1 50 mA
* 2 25 mA
* 3 12.5 mA
*
* @param[in] drive the value (0-3) for the LED drive strength
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_SetLEDDrive(uint8_t drive)
{
uint8_t val[2];
/* Read value from CONTROL register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CONTROL, &val[1], 1)) return 1;
/* Set bits in register to given value */
drive &= 0x03;
drive = drive << 6;
val[1] &= 0x3F;
val[1] |= drive;
/* Write register value back into CONTROL register */
val[0] = APDS9960_CONTROL;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
return 0;
}
/**
* @brief Returns receiver gain for proximity detection
*
* Value Gain
* 0 1x
* 1 2x
* 2 4x
* 3 8x
*
* @param[out] receive gain
* @return 0 if operation successful. 1 otherwise.
*/
uint8_t APDS_9660_GetProximityGain(uint8_t*gain)
{
uint8_t val;
/* Read value from CONTROL register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CONTROL, &val, 1)) return 1;
/* Shift and mask out PDRIVE bits */
*gain = (val >> 2) & 0x03;
return 0;
}
/**
* @brief Sets the receiver gain for proximity detection
*
* Value Gain
* 0 1x
* 1 2x
* 2 4x
* 3 8x
*
* @param[in] drive the value (0-3) for the gain
* @return 0 if operation successful. 1 otherwise.
*/
uint32_t APDS_9660_SetProximityGain(uint8_t drive)
{
uint8_t val[2];
/* Read value from CONTROL register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CONTROL, &val[1], 1)) return 1;
/* Set bits in register to given value */
drive &=0x03;
drive = drive << 2;
val[1] &= 0xF3;
val[1] |= drive;
/* Write register value back into CONTROL register */
val[0] = APDS9960_CONTROL;
if ( APDS_9660_write_RegisterMultiValue( &i2c_master_instance, &val[0], 2)) return 1;
return 0;
}
/**
* @brief Returns receiver gain for the ambient light sensor (ALS)
*
* Value Gain
* 0 1x
* 1 4x
* 2 16x
* 3 64x
*
* @param[out] drive the value (0-3) for the gain
* @return 0 if operation successful. 1 otherwise.
*/
uint8_t APDS_9660_GetAmbientLightGain(uint8_t*gain)
{
uint8_t val;
/* Read value from CONTROL register */
if ( APDS_9660_read_RegisterMultiValue( &i2c_master_instance, APDS9960_CONTROL, &val, 1)) return 1;
/* Shift and mask out ADRIVE bits */
*gain = val & 0x03;
return 0;
}