MSC_Standalone
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Outline
Includes
#include "main.h"
Private variables
USBD_Device
Private function prototypes
Private functions
main()
SystemClock_Config()
Toggle_Leds()
Error_Handler()
HAL_Delay(volatile uint32_t)
Files
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CodeScopeSTM32 Libraries and SamplesMSC_StandaloneSrc/main.c
 
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/** ****************************************************************************** * @file USB_Device/MSC_Standalone/Src/main.c * @author MCD Application Team * @brief USB device Mass storage demo main file ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------ */ #include "main.h" Includes /* Private typedef ----------------------------------------------------------- */ /* Private define ------------------------------------------------------------ */ /* Private macro ------------------------------------------------------------- */ /* Private variables --------------------------------------------------------- */ USBD_HandleTypeDef USBD_Device; Private variables /* Private function prototypes ----------------------------------------------- */ static void SystemClock_Config(void); static void Error_Handler(void); Private function prototypes /* Private functions --------------------------------------------------------- */ /** * @brief Main program * @param None * @retval None *//* ... */ int main(void) { /* STM32F412xx HAL library initialization */ HAL_Init(); /* Configure the System clock to have a frequency of 100 MHz */ SystemClock_Config(); /* Configure LED_RED and LED_BLUE */ BSP_LED_Init(LED_RED); BSP_LED_Init(LED_BLUE); /* Init Device Library */ USBD_Init(&USBD_Device, &MSC_Desc, 0); /* Add Supported Class */ USBD_RegisterClass(&USBD_Device, USBD_MSC_CLASS); /* Add Storage callbacks for MSC Class */ USBD_MSC_RegisterStorage(&USBD_Device, &USBD_DISK_fops); /* Start Device Process */ USBD_Start(&USBD_Device); /* Run Application (Interrupt mode) */ while (1) { }while (1) { ... } }{ ... } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 100000000 * HCLK(Hz) = 100000000 * AHB Prescaler = 1 * APB1 Prescaler = 2 * APB2 Prescaler = 1 * HSE Frequency(Hz) = 8000000 * PLL_M = 8 * PLL_N = 200 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 2 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 3 * The USB clock configuration from PLLI2S: * PLLI2SM = 8 * PLLI2SN = 192 * PLLI2SQ = 4 * @param None * @retval None *//* ... */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; HAL_StatusTypeDef ret = HAL_OK; /* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE(); /* 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); /* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 8; RCC_OscInitStruct.PLL.PLLN = 200; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if (ret != HAL_OK) { Error_Handler(); }if (ret != HAL_OK) { ... } /* Select PLLSAI output as USB clock source */ PeriphClkInitStruct.PLLI2S.PLLI2SM = 8; PeriphClkInitStruct.PLLI2S.PLLI2SQ = 4; PeriphClkInitStruct.PLLI2S.PLLI2SN = 192; PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CK48; PeriphClkInitStruct.Clk48ClockSelection = RCC_CK48CLKSOURCE_PLLI2SQ; HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct); /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 * clocks dividers *//* ... */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3); if (ret != HAL_OK) { Error_Handler(); }if (ret != HAL_OK) { ... } }{ ... } /** * @brief Toggle LEDs to shows user input state. * @param None * @retval None *//* ... */ void Toggle_Leds(void) { static uint32_t ticks; if (ticks++ == 100) { BSP_LED_Toggle(LED_RED); BSP_LED_Toggle(LED_BLUE); ticks = 0; }if (ticks++ == 100) { ... } }{ ... } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None *//* ... */ static void Error_Handler(void) { /* User may add here some code to deal with this error */ while (1) { }while (1) { ... } }{ ... } /** * @brief This function provides accurate delay (in milliseconds) based * on SysTick counter flag. * @note This function is declared as __weak to be overwritten in case of other * implementations in user file. * @param Delay: specifies the delay time length, in milliseconds. * @retval None *//* ... */ void HAL_Delay(__IO uint32_t Delay) { while (Delay) { if (SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) { Delay--; }if (SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) { ... } }while (Delay) { ... } }{ ... } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None *//* ... */ void assert_failed(uint8_t * file, uint32_t line) { /* User can add his own implementation to report the file name and line * number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, * line) *//* ... */ /* Infinite loop */ while (1) { }while (1) { ... } }assert_failed (uint8_t * file, uint32_t line) { ... } /* ... */#endifPrivate functions