/* Copyright 2018 James Laird-Wah
 *
 * 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 2 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/>.
 */

#include "leds.h"
#include "i2c_master.h"
#include "led_tables.h"
#include "rgb_matrix.h"
#include <string.h>
#include "model01.h"

#define I2C_TIMEOUT     1000

void set_all_leds_to(uint8_t r, uint8_t g, uint8_t b) {
  uint8_t buf[] = {
    TWI_CMD_LED_SET_ALL_TO,
    b, g, r
  };
  i2c_transmit(I2C_ADDR(LEFT), buf, sizeof(buf), I2C_TIMEOUT);
  i2c_transmit(I2C_ADDR(RIGHT), buf, sizeof(buf), I2C_TIMEOUT);
  _delay_us(10);
}

void set_led_to(int led, uint8_t r, uint8_t g, uint8_t b) {
  uint8_t buf[] = {
    TWI_CMD_LED_SET_ONE_TO,
    led & 0x1f,
    b, g, r
  };
  int hand = (led >= 32) ? RIGHT : LEFT;
  i2c_transmit(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
  _delay_us(10);
}

#ifdef RGB_MATRIX_ENABLE

static struct {
  uint8_t b;
  uint8_t g;
  uint8_t r;
} __attribute__((packed)) led_state[64];

static void set_color(int index, uint8_t r, uint8_t g, uint8_t b) {
  led_state[index].r = r;
  led_state[index].g = g;
  led_state[index].b = b;
}

static void set_color_all(uint8_t r, uint8_t g, uint8_t b) {
  for (int i=0; i<RGB_MATRIX_LED_COUNT; i++)
    set_color(i, r, g, b);
}

static void init(void) {
  // Enable high current pathway to LEDs - this does violate the USB spec though! (1.6 amps...)
  DDRE |= _BV(6);
  PORTE &= ~_BV(6);

  // Overcurrent check input
  DDRB &= ~_BV(4);
  PORTB &= ~_BV(4);
}

static void flush(void) {
  uint8_t *bank_data = (uint8_t*)&led_state[0];
  uint8_t command[1 + 8*3];
  for (int hand=0; hand<2; hand++) {
    int addr = I2C_ADDR(hand);

    for (int bank=0; bank<4; bank++) {
      command[0] = TWI_CMD_LED_BASE + bank;
      memcpy(&command[1], bank_data, 8*3);
      i2c_transmit(addr, command, sizeof(command), I2C_TIMEOUT);
      _delay_us(100);

      bank_data += 8*3;
    }
  }
}

const rgb_matrix_driver_t rgb_matrix_driver = {
  .init = init,
  .flush = flush,
  .set_color = set_color,
  .set_color_all = set_color_all
};

#endif

/* vim: set ts=2 sw=2 et: */