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Driver for Proximity / Ambient Light Sensor VCNL40xx from Vishay
Diff: VCNL40x0.cpp
- Revision:
- 0:1f3d09f0060a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/VCNL40x0.cpp Sat Nov 30 19:44:13 2013 +0000 @@ -0,0 +1,287 @@ +/* +Copyright (c) 2012 Vishay GmbH, www.vishay.com +author: DS, version 1.21 + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#include "VCNL40x0.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0::VCNL40x0(PinName sda, PinName scl, unsigned char addr) : _i2c(sda, scl), _addr(addr) { + _i2c.frequency(1000000); // set I2C frequency to 1MHz +} + +VCNL40x0::~VCNL40x0() { +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetCommandRegister (unsigned char Command) { + + _send[0] = REGISTER_COMMAND; // VCNL40x0 Configuration reister + _send[1] = Command; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadCommandRegister (unsigned char *Command) { + + _send[0] = REGISTER_COMMAND; // VCNL40x0 Configuration register + _i2c.write(VCNL40x0_ADDRESS,_send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1,_receive, 1); // Read 1 byte on I2C + + *Command = (unsigned char)(_receive[0]); + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadID (unsigned char *ID) { + + _send[0] = REGISTER_ID; // VCNL40x0 product ID revision register + _i2c.write(VCNL40x0_ADDRESS, _send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1, _receive, 1); // Read 1 byte on I2C + + *ID = (unsigned char)(_receive[0]); + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetCurrent (unsigned char Current) { + + _send[0] = REGISTER_PROX_CURRENT; // VCNL40x0 IR LED Current register + _send[1] = Current; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadCurrent (unsigned char *Current) { + + _send[0] = REGISTER_PROX_CURRENT; // VCNL40x0 IR LED current register + _i2c.write(VCNL40x0_ADDRESS,_send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1,_receive, 1); // Read 1 byte on I2C + + *Current = (unsigned char)(_receive[0]); + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetProximityRate (unsigned char ProximityRate) { + + _send[0] = REGISTER_PROX_RATE; // VCNL40x0 Proximity rate register + _send[1] = ProximityRate; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetAmbiConfiguration (unsigned char AmbiConfiguration) { + + _send[0] = REGISTER_AMBI_PARAMETER; // VCNL40x0 Ambilight configuration + _send[1] = AmbiConfiguration; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetInterruptControl (unsigned char InterruptControl) { + + _send[0] = REGISTER_INTERRUPT_CONTROL; // VCNL40x0 Interrupt Control register + _send[1] = InterruptControl; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadInterruptControl (unsigned char *InterruptControl) { + + _send[0] = REGISTER_INTERRUPT_CONTROL; // VCNL40x0 Interrupt Control register + _i2c.write(VCNL40x0_ADDRESS,_send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1,_receive, 1); // Read 1 byte on I2C + + *InterruptControl = (unsigned char)(_receive[0]); + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetInterruptStatus (unsigned char InterruptStatus) { + + _send[0] = REGISTER_INTERRUPT_STATUS; // VCNL40x0 Interrupt Status register + _send[1] = InterruptStatus; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetModulatorTimingAdjustment (unsigned char ModulatorTimingAdjustment) { + + _send[0] = REGISTER_PROX_TIMING; // VCNL40x0 Modulator Timing Adjustment register + _send[1] = ModulatorTimingAdjustment; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadInterruptStatus (unsigned char *InterruptStatus) { + + _send[0] = REGISTER_INTERRUPT_STATUS; // VCNL40x0 Interrupt Status register + _i2c.write(VCNL40x0_ADDRESS,_send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1,_receive, 1); // Read 1 byte on I2C + + *InterruptStatus = (unsigned char)(_receive[0]); + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadProxiValue (unsigned int *ProxiValue) { + + _send[0] = REGISTER_PROX_VALUE; // VCNL40x0 Proximity Value register + _i2c.write(VCNL40x0_ADDRESS, _send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1, _receive, 2); // Read 2 bytes on I2C + *ProxiValue = ((unsigned int)_receive[0] << 8 | (unsigned char)_receive[1]); + + return VCNL40x0_ERROR_OK; + +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadAmbiValue (unsigned int *AmbiValue) { + + _send[0] = REGISTER_AMBI_VALUE; // VCNL40x0 Ambient Light Value register + _i2c.write(VCNL40x0_ADDRESS, _send, 1); // Write 1 byte on I2C + _i2c.read(VCNL40x0_ADDRESS+1, _receive, 2); // Read 2 bytes on I2C + *AmbiValue = ((unsigned int)_receive[0] << 8 | (unsigned char)_receive[1]); + + return VCNL40x0_ERROR_OK; + +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetLowThreshold (unsigned int LowThreshold) { + + unsigned char LoByte=0, HiByte=0; + + LoByte = (unsigned char)(LowThreshold & 0x00ff); + HiByte = (unsigned char)((LowThreshold & 0xff00)>>8); + + _send[0] = REGISTER_INTERRUPT_LOW_THRES; // VCNL40x0 Low Threshold Register, Hi Byte + _send[1] = HiByte; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + _send[0] = REGISTER_INTERRUPT_LOW_THRES+1; // VCNL40x0 Low Threshold Register, Lo Byte + _send[1] = LoByte; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; + +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::SetHighThreshold (unsigned int HighThreshold) { + + unsigned char LoByte=0, HiByte=0; + + LoByte = (unsigned char)(HighThreshold & 0x00ff); + HiByte = (unsigned char)((HighThreshold & 0xff00)>>8); + + _send[0] = REGISTER_INTERRUPT_HIGH_THRES; // VCNL40x0 High Threshold Register, Hi Byte + _send[1] = HiByte; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + _send[0] = REGISTER_INTERRUPT_HIGH_THRES+1; // VCNL40x0 High Threshold Register, Lo Byte + _send[1] = LoByte; + _i2c.write(VCNL40x0_ADDRESS,_send, 2); // Write 2 bytes on I2C + + return VCNL40x0_ERROR_OK; + +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadProxiOnDemand (unsigned int *ProxiValue) { + + unsigned char Command=0; + + // enable prox value on demand + SetCommandRegister (COMMAND_PROX_ENABLE | COMMAND_PROX_ON_DEMAND); + + // wait on prox data ready bit + do { + ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_PROX_DATA_READY)); + + ReadProxiValue (ProxiValue); // read prox value + + SetCommandRegister (COMMAND_ALL_DISABLE); // stop prox value on demand + + return VCNL40x0_ERROR_OK; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +VCNL40x0Error_e VCNL40x0::ReadAmbiOnDemand (unsigned int *AmbiValue) { + + unsigned char Command=0; + + // enable ambi value on demand + SetCommandRegister (COMMAND_PROX_ENABLE | COMMAND_AMBI_ON_DEMAND); + + // wait on ambi data ready bit + do { + ReadCommandRegister (&Command); // read command register + } while (!(Command & COMMAND_MASK_AMBI_DATA_READY)); + + ReadAmbiValue (AmbiValue); // read ambi value + + SetCommandRegister (COMMAND_ALL_DISABLE); // stop ambi value on demand + + return VCNL40x0_ERROR_OK; +}