STM32實現USB串口源碼，可與電腦通信

ID:368436 · 發表于 2018-9-29 09:43

采用STM32的USB接口實現串口功能，可方便STM32的調試通信等功能。

3,例程KEIL MDK版本？ V4.22A
4,例程軟件庫版本？未使用
5,例程驅動庫版本？ V3.5.0
6,例程是用多大尺寸的液晶屏測試的?  未使用
7,例程是用多少G的SD卡測試?          未使用
8,程序設置下載是否復位運行？  是

STM32單片機源程序如下:

/****************************Copyright(c)*****************************
**--------------File Info---------------------------------------------------------------------------------
** File name: main.c
** Last modified Date: 2014-03-14
** Last Version: V1.00
** Descriptions:
**
**----------------------------------------------------------------------------------------------------
** Created by: hzq
** Created date: 2014-03-14
** Version: V1.00
** Descriptions: 下載程序，3.2寸屏顯示對應的信息，等待USB枚舉完成，安裝驅動之后，可以識別出虛擬串口。
** USB口接在USB2上。
**
**----------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
*****************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc_core.h"
#include "usbd_usr.h"
#include "usb_conf.h"
#include "usbd_desc.h"
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @{
*/
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN USB_OTG_CORE_HANDLE USB_OTG_dev __ALIGN_END ;
/**
* @}
*/
/** @defgroup APP_VCP_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @defgroup APP_VCP_Private_Functions
* @{
*/
/**
* @brief Program entry point
* @param None
* @retval None
*/
int main(void)
{
__IO uint32_t i = 0;
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32fxxx_xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32fxxx.c file
*/
USBD_Init(&USB_OTG_dev,
#ifdef USE_USB_OTG_HS
USB_OTG_HS_CORE_ID,
#else
USB_OTG_FS_CORE_ID,
#endif
&USR_desc,
&USBD_CDC_cb,
&USR_cb);
/* Main loop */
while (1)
{
if (i++ == 0x100000)
{
STM_EVAL_LEDToggle(LED1);
STM_EVAL_LEDToggle(LED2);
STM_EVAL_LEDToggle(LED3);
STM_EVAL_LEDToggle(LED4);
i = 0;
}
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief assert_failed
* 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
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/