File content as of revision 1:c279bc3af90c:

#include "LEDDriver.h"
#include "mbed.h"
#define DEBUG "LEDDriver"
#include "Logger.h"
#include <cassert>

LEDDriver::LEDDriver(I2C &i2c) : I2CPeripheral(i2c, 0x60 /* I2C address of the LED controller */) {
    // cf. LP5562TME/NOPB datasheet page 14
    // Supply 3.6V to VDD (hardware - done)
    // Supply 1.8V to EN (hardware - done)
    wait_ms(1); // wait 1 ms
    write_reg(0x00, 0xC0); // chip_en to 1, log_en to 1
    wait_us(500); // wait 500 usec
    write_reg(0x08, 0x61); // set PWM freq high, enable power save mode, start internal clock
    write_reg(0x70, 0x00); // configure all LEDs to be controlled from I2C registers
    
    setColor(Colors::black);
}

void LEDDriver::setColor(const uint8_t r, const uint8_t g, const uint8_t b) {
    write_reg(0x04, r);
    write_reg(0x03, g);
    write_reg(0x02, b);
}

void LEDDriver::setColor(const float r, const float g, const float b)
{
    setColor(r * 255, g * 255, b * 255);
}

void LEDDriver::setColor(const Color color)
{
    const uint8_t r = (color >> 16) & 0xff;
    const uint8_t g = (color >> 8) & 0xff;
    const uint8_t b = (color >> 0) & 0xff;
    setColor(r, g, b);
}

LEDDriver& LEDDriver::operator=(const Color& c) {
    setColor(c);
    return *this;
}

void LEDDriver::setOutputCurrent(const float mA) {
    assert(mA <= 25.5);
    assert(mA >= 0.1);
    write_reg(0x05, mA * 10);
    write_reg(0x06, mA * 10);
    write_reg(0x07, mA * 10);
    INFO("Output current => %0.1f mA", mA);
}