esp32-s2_dfu/hw/bsp/esp32s2_saola_1/esp32s2_saola_1.c

/* 
 * The MIT License (MIT)
 *
 * Copyright (c) 2020, Ha Thach (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 "bsp/board.h"
#include "driver/gpio.h"
#include "hal/usb_hal.h"

//--------------------------------------------------------------------+
// MACRO TYPEDEF CONSTANT ENUM DECLARATION
//--------------------------------------------------------------------+

// TODO use saola-1 on-board neopixel (WS2812)
#define LED_PIN               21

#define BUTTON_PIN            0
#define BUTTON_STATE_ACTIVE   0

// Initialize on-board peripherals : led, button, uart and USB
void board_init(void)
{
  // LED
  gpio_pad_select_gpio(LED_PIN);
  gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);

  // Button
  gpio_pad_select_gpio(BUTTON_PIN);
  gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
  gpio_set_pull_mode(BUTTON_PIN, BUTTON_STATE_ACTIVE ? GPIO_PULLDOWN_ONLY : GPIO_PULLUP_ONLY);

  // USB Controller Hal init
  usb_hal_context_t hal = {
    .use_external_phy = false // use built-in PHY
  };
  usb_hal_init(&hal);
}

// Turn LED on or off
void board_led_write(bool state)
{
  gpio_set_level(LED_PIN, state);
}

// Get the current state of button
// a '1' means active (pressed), a '0' means inactive.
uint32_t board_button_read(void)
{
  return gpio_get_level(BUTTON_PIN) == BUTTON_STATE_ACTIVE;
}

// Get characters from UART
int board_uart_read(uint8_t* buf, int len)
{
  (void) buf; (void) len;
  return 0;
}

// Send characters to UART
int board_uart_write(void const * buf, int len)
{
  (void) buf; (void) len;
  return 0;
}