Class module for ISL29011 Ambient Light Sensor
Dependents: mDotEVBM2X MTDOT-EVBDemo-DRH MTDOT-BOX-EVB-Factory-Firmware-LIB-108 MTDOT-UDKDemo_Senet ... more
ISL29011.cpp
- Committer:
- falingtrea
- Date:
- 2015-07-06
- Revision:
- 0:b37e4acdfa7b
- Child:
- 1:f5b5a0477f46
File content as of revision 0:b37e4acdfa7b:
/** * @file ISL29011.cpp * @brief Device driver - ISL29011 Ambient Light/IR Proximity Sensor IC * @author Tim Barr * @version 1.0 * @see http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29011.pdf * * Copyright (c) 2015 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "ISL29011.h" #include "mbed_debug.h" ISL29011::ISL29011(I2C &i2c, InterruptIn* isl_int = NULL) { _i2c = &i2c; _isl_int = isl_int; ISL29011::init(); return; } uint8_t ISL29011::init(void) { uint8_t result = 0; _i2c->frequency(400000); // Reset all registers to POR values result = ISL29011::writeRegister(COMMAND1, 0x00); if (result == 0){ if (_isl_int == NULL) _polling_mode = true; else _polling_mode = false; result = ISL29011::writeRegister(COMMAND2, 0x00); result = ISL29011::writeRegister(INT_LT_LSB, 0x00); result = ISL29011::writeRegister(INT_LT_MSB, 0x00); result = ISL29011::writeRegister(INT_HT_LSB, 0xFF); result = ISL29011::writeRegister(INT_HT_MSB, 0xFF); } if(result != 0) { debug("ILS29011:init failed\n\r"); } return result; } /** Get the data * @return The last valid LUX reading from the ambient light sensor */ uint16_t ISL29011::getData(void) { if (_polling_mode) { char datain[2]; ISL29011::readRegister(DATA_LSB, datain, 2); _lux_data = (datain[1] << 8) | datain[0]; } return _lux_data; } /** Setup the ISL29011 measurement mode * @return status of command */ uint8_t ISL29011::setMode(OPERATION_MODE op_mode) const { uint8_t result = 0; char datain[1]; char dataout; result |= ISL29011::readRegister(COMMAND1,datain); dataout = (datain[0] & 0x1F) | op_mode; result |= ISL29011::writeRegister(COMMAND1, dataout); return result; } /** Set Interrupt Persistence Threshold * @return status of command */ uint8_t ISL29011::setPersistence(INT_PERSIST int_persist) const { uint8_t result = 0; char datain[1]; char dataout; result |= ISL29011::readRegister(COMMAND1,datain); dataout = (datain[0] & 0xFC) | int_persist; result |= ISL29011::writeRegister(COMMAND1, dataout); return result; } /** Set Proximity measurement parameters * @return status of command */ uint8_t ISL29011::setProximity(PROX_SCHEME prox_scheme, MOD_FREQ mod_freq, LED_DRIVE led_drive) const { uint8_t result = 0; char datain[1]; char dataout; result |= ISL29011::readRegister(COMMAND2,datain); dataout = (datain[0] & 0x0F) | prox_scheme | mod_freq | led_drive; result |= ISL29011::writeRegister(COMMAND2, dataout); return result; } /** Set ADC Resolution * @return status of command */ uint8_t ISL29011::setResolution(ADC_RESOLUTION adc_resolution) const { uint8_t result = 0; char datain[1]; char dataout; result |= ISL29011::readRegister(COMMAND2,datain); dataout = (datain[0] & 0xF3) | adc_resolution; result |= ISL29011::writeRegister(COMMAND2, dataout); return result; } /** Set the LUX Full Scale measurement range * @return status of command */ uint8_t ISL29011::setRange(LUX_RANGE lux_range ) const { uint8_t result = 0; char datain[1]; char dataout; result |= ISL29011::readRegister(COMMAND2,datain); dataout = (datain[0] & 0xFC) | lux_range; result |= ISL29011::writeRegister(COMMAND2, dataout); return result; } uint8_t ISL29011::writeRegister(uint8_t const reg, uint8_t const data) const { char buf[2] = {reg, data}; uint8_t result = 0; buf[0] = reg; buf[1] = data; // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices result |= _i2c->write(_i2c_addr, buf, 2); // __enable_irq(); // Just need to block during the transaction if(result != 0) { debug("ISL29011:writeRegister failed\n\r"); } return result; } uint8_t ISL29011::readRegister(uint8_t const reg, char* data, uint8_t count) const { uint8_t result = 0; char reg_out[1]; reg_out[0] = reg; // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices result |= _i2c->write(_i2c_addr,reg_out,1,true); // __enable_irq(); // Just need to block during the transaction if(result != 0) { debug("ISL29011::readRegister failed write\n\r"); return result; } // __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices result |= _i2c->read(_i2c_addr,data,count,false); // __enable_irq(); // Just need to block during the transaction if(result != 0) { debug("ISL29011::readRegister failed read\n\r"); } return result; }