espressif_tinyusb/hw/bsp/stm32h743eval/stm32h743eval.c

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2019 William D. Jones (thor0505@comcast.net),
 * 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 "../board.h"

#include "stm32h7xx_hal.h"

//--------------------------------------------------------------------+
// Forward USB interrupt events to TinyUSB IRQ Handler
//--------------------------------------------------------------------+
void OTG_FS_IRQHandler(void)
{
  tud_int_handler(0);
}

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

#define LED_PORT              GPIOA
#define LED_PIN               GPIO_PIN_4
#define LED_STATE_ON          1

// Tamper push-button
#define BUTTON_PORT           GPIOC
#define BUTTON_PIN            GPIO_PIN_13
#define BUTTON_STATE_ACTIVE   0

// enable all LED, Button, Uart, USB clock
static void all_rcc_clk_enable(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();  // LED, USB D+, D-
  __HAL_RCC_GPIOC_CLK_ENABLE();  // Button
//  __HAL_RCC_GPIOD_CLK_ENABLE();  // Uart tx, rx
//  __HAL_RCC_USART3_CLK_ENABLE(); // Uart module
}

/* PWR, RCC, GPIO (All): AHB4 (D3 domain)
   USB{1,2} OTG_{H,F}S: AHB1 (D2 domain)
*/

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow :
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 400000000 (CPU Clock)
  *            HCLK(Hz)                       = 200000000 (AXI and AHBs Clock)
  *            AHB Prescaler                  = 2
  *            D1 APB3 Prescaler              = 2 (APB3 Clock  100MHz)
  *            D2 APB1 Prescaler              = 2 (APB1 Clock  100MHz)
  *            D2 APB2 Prescaler              = 2 (APB2 Clock  100MHz)
  *            D3 APB4 Prescaler              = 2 (APB4 Clock  100MHz)
  *            HSE Frequency(Hz)              = 25000000
  *            PLL_M                          = 5
  *            PLL_N                          = 160
  *            PLL_P                          = 2
  *            PLL_Q                          = 4
  *            PLL_R                          = 2
  *            PLL3_M                         = 25
  *            PLL3_N                         = 336
  *            PLL3_P                         = 2
  *            PLL3_Q                         = 7
  *            PLL3_R                         = 2
  *            VDD(V)                         = 3.3
  *            Flash Latency(WS)              = 4
  * @param  None
  * @retval None
  */

void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;

  /*!< Supply configuration update enable */
  HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

  /* The voltage scaling allows optimizing the power consumption when the device is
     clocked below the maximum system frequency, to update the voltage scaling value
     regarding system frequency refer to product datasheet.  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  while ((PWR->D3CR & (PWR_D3CR_VOSRDY)) != PWR_D3CR_VOSRDY) {}

  /* Enable HSE Oscillator and activate PLL with HSE as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
  RCC_OscInitStruct.CSIState = RCC_CSI_OFF;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  /* PLL1 for System Clock */
  RCC_OscInitStruct.PLL.PLLM = 5;
  RCC_OscInitStruct.PLL.PLLN = 160;
  RCC_OscInitStruct.PLL.PLLFRACN = 0;
  RCC_OscInitStruct.PLL.PLLP = 2;
  RCC_OscInitStruct.PLL.PLLR = 2;
  RCC_OscInitStruct.PLL.PLLQ = 4;

  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOMEDIUM;
  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  /* PLL3 for USB Clock */
  PeriphClkInitStruct.PLL3.PLL3M = 25;
  PeriphClkInitStruct.PLL3.PLL3N = 336;
  PeriphClkInitStruct.PLL3.PLL3FRACN = 0;
  PeriphClkInitStruct.PLL3.PLL3P = 2;
  PeriphClkInitStruct.PLL3.PLL3R = 2;
  PeriphClkInitStruct.PLL3.PLL3Q = 7;

  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
  PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL3;
  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);

  /* Select PLL as system clock source and configure  bus clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_D1PCLK1 | RCC_CLOCKTYPE_PCLK1 | \
  RCC_CLOCKTYPE_PCLK2  | RCC_CLOCKTYPE_D3PCLK1);

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV1;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4);

  /*activate CSI clock mondatory for I/O Compensation Cell*/
  __HAL_RCC_CSI_ENABLE() ;

  /* Enable SYSCFG clock mondatory for I/O Compensation Cell */
  __HAL_RCC_SYSCFG_CLK_ENABLE() ;

  /* Enables the I/O Compensation Cell */
  HAL_EnableCompensationCell();
}

void board_init(void)
{
  SystemClock_Config();
  all_rcc_clk_enable();

  #if CFG_TUSB_OS  == OPT_OS_NONE
    // 1ms tick timer
    SysTick_Config(SystemCoreClock / 1000);
  #endif
  
  GPIO_InitTypeDef  GPIO_InitStruct;

  // LED
  GPIO_InitStruct.Pin = LED_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);

  // Button
  GPIO_InitStruct.Pin = BUTTON_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(BUTTON_PORT, &GPIO_InitStruct);

#if CFG_TUSB_RHPORT0_MODE & OPT_MODE_DEVICE

  // USB1 HS (ULPI Phy), internal FS PHY
  // PB12 ID, PB13 VBUS, PB14 DM, PB15 DP

#endif

#if CFG_TUSB_RHPORT1_MODE & OPT_MODE_DEVICE
  // USB2 FS Pin Init
  // PA9 VUSB, PA10 ID, PA11 DM, PA12 DP

  /* Configure DM DP Pins */
  GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG2_HS;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* Configure VBUS Pin */
  GPIO_InitStruct.Pin = GPIO_PIN_9;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* This for ID line debug */
  GPIO_InitStruct.Pin = GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG2_HS;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  // https://community.st.com/s/question/0D50X00009XkYZLSA3/stm32h7-nucleo-usb-fs-cdc
  // TODO: Board init actually works fine without this line.
  HAL_PWREx_EnableUSBVoltageDetector();
  __HAL_RCC_USB2_OTG_FS_CLK_ENABLE();

  // Enable VBUS sense (B device) via pin PA9
  USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_VBDEN;
#endif
}

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

void board_led_write(bool state)
{
  HAL_GPIO_WritePin(LED_PORT, LED_PIN, state);
}

uint32_t board_button_read(void)
{
  return (BUTTON_STATE_ACTIVE == HAL_GPIO_ReadPin(BUTTON_PORT, BUTTON_PIN)) ? 1 : 0;
}

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

void HardFault_Handler (void)
{
  asm("bkpt");
}

// Required by __libc_init_array in startup code if we are compiling using
// -nostdlib/-nostartfiles.
void _init(void)
{

}