File content as of revision 0:b28a2dfe05fd:

/**
 * @file    NCP5623B.cpp
 * @brief   Device driver - NCP5623B Triple LED Driver IC w/RTOS support
 * @author  Tim Barr
 * @version 1.0
 * @see     http://www.onsemi.com/pub/Collateral/NCP5623B-D.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 "NCP5623B.h"
#include "mbed_debug.h"
#include "rtos.h"
 
NCP5623B::NCP5623B(I2C &i2c)
{
    _i2c =  &i2c;

    NCP5623B::init();
    
    return;
}

uint8_t NCP5623B::init(void)
{
    uint8_t result = 0;
    
    _i2c->frequency(400000);
    
    // Turn off all LEDs and initialize all registers
	result |= NCP5623B::writeRegister(NCP5623B::DIMDWNSET, 0x00);
    result |= NCP5623B::writeRegister(NCP5623B::DIMTIME, 0x01);
    osDelay (1000);
    result |= NCP5623B::writeRegister(NCP5623B::LEDCURR, 0x00);
	result |= NCP5623B::writeRegister(NCP5623B::PWMLED1, 0x00);
	result |= NCP5623B::writeRegister(NCP5623B::PWMLED2, 0x00);
	result |= NCP5623B::writeRegister(NCP5623B::PWMLED3, 0x00);

    if(result != 0)
    {
        debug("ILS29011:init failed\n\r");
    }
    
     return result;
}

	/** Shutdown LEDS
	 *  @return status of command
	 */
uint8_t NCP5623B::shutdown(void) const
{
	uint8_t result = 0;

    result |= NCP5623B::writeRegister(NCP5623B::SHUTDWN, 0x00);
    return result;

}

/** Set static LED Current
 *  data - value of current draw for all LEDs range 0-31
 *  @return status of command
 */
uint8_t NCP5623B::setLEDCurrent(uint8_t data) const
{
	uint8_t result = 0;

    result |= NCP5623B::writeRegister(NCP5623B::LEDCURR, data);
    return result;
}

	/** Set PWM mode for specific LED
	 *  @lednum - selects LED
	 *  @data - PWM value to set  range 0-31 0-100% Pulse width
	 *  @return status of command
	 */
uint8_t NCP5623B::setPWM(LEDNUM lednum, int8_t data ) const
{
	uint8_t result = 0;

	switch (lednum) {
	case NCP5623B::LED_1:
		result |= NCP5623B::writeRegister(NCP5623B::PWMLED1, data);
		break;
	case NCP5623B::LED_2:
		result |= NCP5623B::writeRegister(NCP5623B::PWMLED2, data);
		break;
	case NCP5623B::LED_3:
		result |= NCP5623B::writeRegister(NCP5623B::PWMLED3, data);
		break;
	}
    return result;
}

    /** Set Dimming mode for all LEDs
     *  @dimdir - direction of dimming
     *  @endstep - ending step of ramp up or ramp down range 0-31
     *  @steptime - time per step range 0-31 in 8 msec multiples
     *  @return status of command
     */
    uint8_t NCP5623B::setDimming(DIMDIRECTION dimdir, uint8_t endstep, uint8_t steptime) const
{
    	uint8_t result = 0;

    	if (dimdir == NCP5623B::DIMDWN)
    		result |= NCP5623B::writeRegister(NCP5623B::DIMDWNSET, endstep);
    	else
    		result |= NCP5623B::writeRegister(NCP5623B::DIMUPSET, endstep);

        result |= NCP5623B::writeRegister(NCP5623B::DIMTIME, steptime);

        return result;
}
    /** Write to a register (exposed for debugging reasons)
     * @param reg - The register to be written
     * @param data - The data to be written
     */
uint8_t NCP5623B::writeRegister(NCP5623B::REGISTER const reg, uint8_t const data) const
{
    char buf[1];
    uint8_t result = 0;

    buf[0] = reg | (data & NCP5623B::DATAMASK);
    
//    __disable_irq();  // // Tickers and other timebase events can jack up the I2C bus for some devices
    result |= _i2c->write(_i2c_addr, buf, 1);
//    __enable_irq();  // Just need to block during the transaction

    if(result != 0)
    {
        debug("NCP5623B:writeRegister failed\n\r");
    }
    
    return result;
}