tinyusb/hw/bsp/stm32g0/boards/stm32g0b1nucleo/board.h

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2020, Ha Thach (tinyusb.org)
 * Copyright (c) 2034, 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.
 */

#ifndef BOARD_H_
#define BOARD_H_

#ifdef __cplusplus
 extern "C" {
#endif

// G0B1RE Nucleo does not has usb connection. We need to manually connect
// - PA12 for D+, CN10.12
// - PA11 for D-, CN10.14

// LED
#define LED_PORT              GPIOA
#define LED_PIN               GPIO_PIN_5
#define LED_STATE_ON          0

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

// UART Enable for STLink VCOM
#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


//--------------------------------------------------------------------+
// RCC Clock
//--------------------------------------------------------------------+
#if 1
// Clock configure for STM32G0B1RE Nucleo
static inline void board_clock_init(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure. */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 8;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  /** 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_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);

  // Configure CRS clock source
  __HAL_RCC_CRS_CLK_ENABLE();
  RCC_CRSInitTypeDef RCC_CRSInitStruct = {0};
  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);

  /* Select HSI48 as USB clock source */
  RCC_PeriphCLKInitTypeDef usb_clk = {0 };
  usb_clk.PeriphClockSelection = RCC_PERIPHCLK_USB;
  usb_clk.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
  HAL_RCCEx_PeriphCLKConfig(&usb_clk);

  // Enable HSI48
  RCC_OscInitTypeDef osc_hsi48 = {0};
  osc_hsi48.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
  osc_hsi48.HSI48State = RCC_HSI48_ON;
  HAL_RCC_OscConfig(&osc_hsi48);
}
#else

// Clock configure for STM32G0 nucleo with B0 mcu variant for someone that is skilled enough
// to rework and solder the B0 chip. Note: SB17 may need to be soldered as well (check user manual)
static inline void board_clock_init(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct = { 0 };

  /** Configure the main internal regulator output voltage */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure. */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 12;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  /* Select HSI48 as USB clock source */
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
  PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);

  /** 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_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
}
#endif

#ifdef __cplusplus
 }
#endif

#endif /* BOARD_H_ */