/* 
 * The MIT License (MIT)
 *
 * Copyright (c) 2018, hathach (tinyusb.org)
 *
 * 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.
 *
 * This file is part of the TinyUSB stack.
 */

#include "../board.h"
#include "LPC51U68.h"
#include "fsl_gpio.h"

#define LED_PORT      0
#define LED_PIN       29
#define LED_STATE_ON  0

// WAKE button
#define BUTTON_PORT   0
#define BUTTON_PIN    24

void board_init(void)
{
  /* Board pin, clock, debug console init */
  /* attach 12 MHz clock to FLEXCOMM0 (debug console) */
  //    CLOCK_AttachClk(BOARD_DEBUG_UART_CLK_ATTACH);
  /* enable clock for GPIO*/
  CLOCK_EnableClock(kCLOCK_Gpio0);
  CLOCK_EnableClock(kCLOCK_Gpio1);

#if CFG_TUSB_OS == OPT_OS_NONE
  // 1ms tick timer
  SysTick_Config(SystemCoreClock / 1000);
#elif CFG_TUSB_OS == OPT_OS_FREERTOS
  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
#endif

  GPIO_PortInit(GPIO, LED_PORT);
  GPIO_PortInit(GPIO, BUTTON_PORT);

  // LED
  gpio_pin_config_t const led_config = { kGPIO_DigitalOutput, 0};
  GPIO_PinInit(GPIO, LED_PORT, LED_PIN, &led_config);
  board_led_write(true);

  // Button
  gpio_pin_config_t const button_config = { kGPIO_DigitalInput, 0};
  GPIO_PinInit(GPIO, BUTTON_PORT, BUTTON_PIN, &button_config);
}

//--------------------------------------------------------------------+
// Board porting API
//--------------------------------------------------------------------+

void board_led_write(bool state)
{
  GPIO_PinWrite(GPIO, LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
}

uint32_t board_button_read(void)
{
  // active low
  return 1-GPIO_PinRead(GPIO, BUTTON_PORT, BUTTON_PIN);
}

int board_uart_read(uint8_t* buf, int len)
{
  (void) buf;
  (void) len;
  return 0;
}

int board_uart_write(void const * buf, int len)
{
  (void) buf;
  (void) len;
  return 0;
}

#if CFG_TUSB_OS == OPT_OS_NONE
volatile uint32_t system_ticks = 0;
void SysTick_Handler(void)
{
  system_ticks++;
}

uint32_t board_millis(void)
{
  return system_ticks;
}
#endif