leds.cc
// Copyright 2015 Olivier Gillet.
//
// Author: Olivier Gillet (ol.gillet@gmail.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 
// See http://creativecommons.org/licenses/MIT/ for more information.
//
// -----------------------------------------------------------------------------
//
// Driver for all the LEDs.

#include "marbles/drivers/leds.h"

#include <algorithm>

#include <stm32f4xx_conf.h>

namespace marbles {

using namespace std;

struct LedDefinition {
  GPIO_TypeDef* gpio;
  uint16_t pin[3];  // pins for R, G, B - assumed to be on the same GPIO
};

const LedDefinition led_definition[] = {
  { GPIOB, { 0, GPIO_Pin_10, 0 } },  // LED_T_DEJA_VU
  { GPIOB, { GPIO_Pin_13, GPIO_Pin_12, 0 } },  // LED_T_MODEL
  { GPIOC, { GPIO_Pin_7, GPIO_Pin_6, 0 } },  // LED_T_RANGE
  { GPIOB, { 0, GPIO_Pin_9, 0 } },  // LED_X_DEJA_VU
  { GPIOB, { GPIO_Pin_8, GPIO_Pin_7, 0 } },  // LED_X_CONTROL_MODE,
  { GPIOB, { GPIO_Pin_4, GPIO_Pin_5, 0 } },  // LED_X_RANGE
  { GPIOB, { 0, GPIO_Pin_3, 0 } }  // LED_X_EXT
};

void Leds::Init() {
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  
  GPIO_InitTypeDef gpio_init;
  gpio_init.GPIO_Mode = GPIO_Mode_OUT;
  gpio_init.GPIO_OType = GPIO_OType_PP;
  gpio_init.GPIO_Speed = GPIO_Speed_2MHz;
  gpio_init.GPIO_PuPd = GPIO_PuPd_NOPULL;
  
  for (int i = 0; i < LED_LAST; ++i) {
    LedDefinition d = led_definition[i];
    gpio_init.GPIO_Pin = d.pin[0] | d.pin[1] | d.pin[2];
    GPIO_Init(d.gpio, &gpio_init);
  }
  Clear();
}

void Leds::Clear() {
  fill(&colors_[0], &colors_[LED_LAST], LED_COLOR_OFF);
}

void Leds::Write() {
  for (int i = 0; i < LED_LAST; ++i) {
    LedDefinition d = led_definition[i];
    GPIO_WriteBit(d.gpio, d.pin[0], static_cast<BitAction>(
        (colors_[i] & 0x800000) >> 23));
    GPIO_WriteBit(d.gpio, d.pin[1], static_cast<BitAction>(
        (colors_[i] & 0x008000) >> 15));
  }
}

}  // namespace marbles