tinyUSB/hw/bsp/stm32c0/boards/stm32c071nucleo/board.h

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2020, Ha Thach (tinyusb.org)
 * Copyright (c) 2023, HiFiPhile
 *
 * 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.
 */

/* metadata:
   name: STM32C071 Nucleo
   url: https://www.st.com/en/evaluation-tools/nucleo-g071rb.html
*/

#ifndef BOARD_H_
#define BOARD_H_

// Green LED
#define GREEN_LED_PORT         GPIOA
#define GREEN_LED_PIN          GPIO_PIN_5
#define GREEN_LED_STATE_ON     1

// Blue LED
#define BLUE_LED_PORT          GPIOC
#define BLUE_LED_PIN           GPIO_PIN_9
#define BLUE_LED_STATE_ON      0

// Generic LED
#define LED_PORT GREEN_LED_PORT
#define LED_PIN GREEN_LED_PIN
#define LED_STATE_ON GREEN_LED_STATE_ON

// Button
#define BUTTON_PORT           GPIOC
#define BUTTON_PIN            GPIO_PIN_13
#define BUTTON_STATE_ACTIVE   0

// Enable UART serial communication with the ST-Link
#define UART_DEV              USART2
#define UART_CLK_EN           __HAL_RCC_USART2_CLK_ENABLE
#define UART_GPIO_PORT        GPIOA
#define UART_GPIO_AF          GPIO_AF1_USART2
#define UART_TX_PIN           GPIO_PIN_2
#define UART_RX_PIN           GPIO_PIN_3

static inline void board_clock_init(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_CRSInitTypeDef RCC_CRSInitStruct = {0};

  /* -1- Enable HSIUSB48  Oscillator */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;

  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  /* -2- Initializes the CPU, AHB and APB buses clocks */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSIUSB48;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;

  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);


  __HAL_RCC_CRS_CLK_ENABLE();

  // Configures CRS
  RCC_CRSInitStruct.Prescaler = RCC_CRS_SYNC_DIV1;
  RCC_CRSInitStruct.Source = RCC_CRS_SYNC_SOURCE_USB;
  RCC_CRSInitStruct.Polarity = RCC_CRS_SYNC_POLARITY_RISING;
  RCC_CRSInitStruct.ReloadValue = __HAL_RCC_CRS_RELOADVALUE_CALCULATE(48000000,1000);
  RCC_CRSInitStruct.ErrorLimitValue = 34;
  RCC_CRSInitStruct.HSI48CalibrationValue = 32;

  HAL_RCCEx_CRSConfig(&RCC_CRSInitStruct);
}

#endif /* BOARD_H_ */