/*
  ToshibaLED I2C driver
*/
/*
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/* LED driver for TCA62724FMG */

#include "ToshibaLED_I2C.h"

#include <utility>

#include <AP_HAL/AP_HAL.h>

extern const AP_HAL::HAL& hal;

#define TOSHIBA_LED_BRIGHT  0xFF    // full brightness
#define TOSHIBA_LED_MEDIUM  0x80    // medium brightness
#define TOSHIBA_LED_DIM     0x11    // dim
#define TOSHIBA_LED_OFF     0x00    // off

// #define TOSHIBA_LED_I2C_ADDR 0x55    // default I2C bus address
#define TOSHIBA_LED_I2C_ADDR 0x56    // default I2C bus address

#define TOSHIBA_LED_PWM0    0x01    // pwm0 register
#define TOSHIBA_LED_PWM1    0x02    // pwm1 register
#define TOSHIBA_LED_PWM2    0x03    // pwm2 register
#define TOSHIBA_LED_ENABLE  0x04    // enable register

ToshibaLED_I2C::ToshibaLED_I2C(uint8_t bus)
    : RGBLed(TOSHIBA_LED_OFF, TOSHIBA_LED_BRIGHT, TOSHIBA_LED_MEDIUM, TOSHIBA_LED_DIM)
    , _bus(bus)
{
}

bool ToshibaLED_I2C::hw_init(void)
{
    // first look for led on external bus
    _dev = std::move(hal.i2c_mgr->get_device(_bus, TOSHIBA_LED_I2C_ADDR));
    
    if (!_dev) {
        return false;
    }
    WITH_SEMAPHORE(_dev->get_semaphore());

    _dev->set_retries(10);

    // enable the led
    bool ret = _dev->write_register(TOSHIBA_LED_ENABLE, 0x03);
    if (!ret) {
        return false;
    }

    // update the red, green and blue values to zero
    uint8_t val[4] = { TOSHIBA_LED_PWM0, _led_off, _led_off, _led_off };
    ret = _dev->transfer(val, sizeof(val), nullptr, 0);

    _dev->set_retries(1);

    if (ret) {
        _dev->register_periodic_callback(20000, FUNCTOR_BIND_MEMBER(&ToshibaLED_I2C::_timer, void));
    }
    return ret;
}

// set_rgb - set color as a combination of red, green and blue values
bool ToshibaLED_I2C::hw_set_rgb(uint8_t red, uint8_t green, uint8_t blue)
{
    // rgb = {red, green, blue};
    // _need_update = true;
    // return true;


    static uint8_t cnt;
    static uint8_t l_mode,l_red,l_green,l_blue;
    rgb = {red, green, blue};
    
    cnt++;

    if(l_mode != rgb_mode || l_red != rgb.r || l_green != rgb.g || l_blue != rgb.b || cnt > 50)
    {
        cnt =0;
        _need_update = true;
        l_mode = rgb_mode ;
        l_red = rgb.r ;
        l_green = rgb.g ;
        l_blue = rgb.b;
    }
    return true;
    
}

void ToshibaLED_I2C::set_rgb_mode(uint8_t mode)
{
    rgb_mode = mode;
}

void ToshibaLED_I2C::_timer(void)
{
    if (!_need_update) {
        return;
    }
    _need_update = false;

    /* 4-bit for each color */
    uint8_t val[4] = { TOSHIBA_LED_PWM0, (uint8_t)(rgb.b >> 4),
                       (uint8_t)(rgb.g / 16), (uint8_t)(rgb.r / 16) };

    val[0] = rgb_mode;
    val[1] = rgb.r;
    val[2] = rgb.g;
    val[3] = rgb.b;
    _dev->transfer(val, sizeof(val), nullptr, 0);
}