stm32f401完整版电路原理图，包括主原理图，各部分细节原理图，包括USB等模块细节原理，适合新手学习，细化LED接口位置

STM32F407标准例程，可用于常规化功能的实现，直接调用，方便使用。

stm32f4xx官方usb例程，包括hid的主从设备例程，msc优盘例程，otg

电脑需先安装Keil MDK5。此固件库为Keil官方提供，直接双击安装即可，安装成功后在MDK5工程的Device中可以选择STM32该系列的ARM芯片。 Version: 2.14.0 (2019-07-24) Keil.STM32F4xx_DFP.2.14.0.pack Warning: --C99 is no longer enforced via the device description. Enable 'C99 Mode' in 'Options for Target' dialog's 'C/C++' tab. Updated Pack to include subset of STM32Cube_FW_F4 Firmware Package version V1.24.1 using HAL Drivers V1.7.6. Corrected RTE_Device.h UART5 pin configuration. MX_Device_h.ftl: Updated parsing of USART virtual mode. Updated generation of macros: Added handling for '(' and ')' symbols. Corrected launching STM32CubeMX via "play" button for existing projects overwrites with a new STM32CubeMX project file instead of loading existing project. Updated SVD files: Added SPI4RST missing field to STM32F401xE.svd, STM32F411xx.svd and STM32F412xG.svd. Updated Flash Algorithm: Added new target for STM32F4xx_1536.FLM including fix for GetSecNum() in this target. Updated Boards Examples: MCBSTM32F400: Added USB Device RNDIS example. GUI_VNC example GUIThread priority corrected from osPriorityIdle to osPriorityNormal. Updated File System Demo: corrected invalid free space value shown in case of unmounted drives. Graphics examples use Segger emWin version 5.50.0. All examples: Enable Event Recorder in debug targets. Updated LCDConf.c (ready for GUI_USE_ARGD = 1). Terminating app_main thread with osThreadExit() to avoid endless loop.

Updated Pack to STM32Cube_FW_F4 Firmware Package version V1.25.1 using HAL Drivers V1.7.9. STM32CubeMX integration (Version 6.0.1): Added support for Timebase Source TIMx (FrameworkCubeMX_gpdsc.ftl). Removed non-existent include path. CMSIS Flash Algorithm: Corrected STM32F42xxx_43xxx_OPT Algorithm. CMSIS SVD: Updated STM32F42*.svd, STM32F43*.svd files. CMSIS-Driver: I2C: Corrected 2 byte reception in master mode. MCI: Replaced empty delay loops with _NOP(). SPI: Corrected PowerControl function (to return error if Initialize was not called, to abort active transfer if power off was requested). Updated GetDataCount function to give accurate count in DMA mode. Corrected Control function (abort in DMA mode, software controlled slave select in slave mode, TI Frame Format selection, ignore bus speed for slave mode). Corrected Uninitialize function (to power off the peripheral if it is powered). Corrected SPI3_SCK pin configuration. Corrected DMA MemDataAlignment configuration. USART: Corrected DMA MemDataAlignment configuration. USBD_HS/USBH_HS: OTG_HS ULPI clock disabled in low power if internal PHY is used to enable proper operation of OTG_HS port in FS mode during CPU sleep. CAN/EMAC/USBD/USBH: Removed macros already provided by cmsis_compiler.h. Updated Boards Examples: Migrated CubeMX projects to V6.0.1 and updated config files. Changed variant selection to "MDK-Plus" where possible. Updated all USB Host/Device examples with user templates from MDK-Middleware v7.11.1. Terminating app_main thread with osThreadExit() to avoid endless loop Updated MS Windows UBS driver files.

STM32F4系列芯片支持包，欢迎下载。

Keil.STM32F4xx_DFP.1.0.5.PACK官网下载速度太慢了，提供给有需要的同学

本固件包是STM32F4系列芯片的固件包，使用于KEIL软件，版本为最新的2.15版本,由于ARM官网下载太慢，故传到百度网盘以便大家能够快速下载使用起来

Keil.STM32F4xx_DFP.2.5.0固件包

STM32F4xx中文参考手册.pdf