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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"
/* Private typedef -----------------------------------------------------------*/
typedef enum
{
SHIELD_NOT_DETECTED = 0,
SHIELD_DETECTED
}ShieldStatus;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USBD_HandleTypeDef USBD_Device;
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static ShieldStatus TFT_ShieldDetect(void);
static void Error_Handler(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F413xx HAL library initialization */
HAL_Init();
/* Configure the System clock to have a frequency of 100 MHz */
SystemClock_Config();
/* Check the availability of adafruit 1.8" TFT shield on top of STM32NUCLEO
board. This is done by reading the state of IO PC.01 pin (mapped to JoyStick
available on adafruit 1.8" TFT shield). If the state of PC.01 is high then
the adafruit 1.8" TFT shield is available. */
if(TFT_ShieldDetect() != SHIELD_DETECTED)
{
Error_Handler();
}
/* 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)
{
Toggle_Leds();
}
}
/**
* @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) = 5
* 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_BYPASS;
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();
}
/* Select PLLI2S 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();
}
}
/**
* @brief Check the availability of adafruit 1.8" TFT shield on top of STM32NUCLEO
* board. This is done by reading the state of IO PC.01 pin (mapped to
* JoyStick available on adafruit 1.8" TFT shield). If the state of PC.01
* is high then the adafruit 1.8" TFT shield is available.
* @param None
* @retval SHIELD_DETECTED: 1.8" TFT shield is available
* SHIELD_NOT_DETECTED: 1.8" TFT shield is not available
*/
static ShieldStatus TFT_ShieldDetect(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Enable GPIO clock */
__HAL_RCC_GPIOC_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
if(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_1) != 0)
{
return SHIELD_DETECTED;
}
else
{
return SHIELD_NOT_DETECTED;
}
}
/**
* @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;
}
}
/**
* @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)
{
}
}
/**
* @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--;
}
}
}
#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)
{
}
}
#endif
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