STM32F4 MCU serial-dma hardware configuration, testing procedures, help beginners learn valuable information

USART_DMA\Debug\Exe\usart.out
.........\.....\...\USART_DMA.out
.........\.....\List\usart.map
.........\.....\....\USART_DMA.map
.........\.....\Obj\main.o
.........\.....\...\startup_stm32f4xx.o
.........\.....\...\system_stm32f4xx.o
.........\.....\...\usart.pbd
.........\.....\...\USART_DMA.pbd
.........\inc\core_cm4.h
.........\...\core_cm4_simd.h
.........\...\core_cmFunc.h
.........\...\core_cmInstr.h
.........\...\stm32f4xx.h
.........\...\system_stm32f4xx.h
.........\settings\usart.cspy.bat
.........\........\usart.dbgdt
.........\........\usart.dni
.........\........\usart.wsdt
.........\........\USART_DMA.cspy.bat
.........\........\USART_DMA.dbgdt
.........\........\USART_DMA.dni
.........\........\usart_dma.wsdt
.........\.tartup\startup_stm32f4xx.s
.........\stm32f4xx_flash.icf
.........\stm32f4xx_flash_extsram.icf
.........\stm32f4xx_sram.icf
.........\USART_DMA.dep
.........\USART_DMA.ewd
.........\USART_DMA.ewp
.........\usart_dma.eww
.........\..er\main.c
.........\....\system_stm32f4xx.c
.........\Debug\Exe
.........\.....\List
.........\.....\Obj
.........\Debug
.........\inc
.........\settings
.........\startup
.........\user
USART_DMA

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