For STM32F207 single-chip microcomputer serial port USART DMA operation, using DMA USART with serial debugging assistant to realize the transmission of the data block.

USART_DMA操作
.............\Libraries
.............\.........\CMSIS
.............\.........\.....\Include
.............\.........\.....\.......\arm_common_tables.h
.............\.........\.....\.......\arm_math.h
.............\.........\.....\.......\core_cm0.h
.............\.........\.....\.......\core_cm3.h
.............\.........\.....\.......\core_cm4.h
.............\.........\.....\.......\core_cm4_simd.h
.............\.........\.....\.......\core_cmFunc.h
.............\.........\.....\.......\core_cmInstr.h
.............\.........\GUI
.............\.........\...\stm32f2xx_lcd.c
.............\.........\...\stm32f2xx_lcd.h
.............\.........\STM32F2xx_libraries
.............\.........\...................\inc
.............\.........\...................\...\misc.h
.............\.........\...................\...\stm32f2xx_adc.h
.............\.........\...................\...\stm32f2xx_can.h
.............\.........\...................\...\stm32f2xx_crc.h
.............\.........\...................\...\stm32f2xx_cryp.h
.............\.........\...................\...\stm32f2xx_dac.h
.............\.........\...................\...\stm32f2xx_dbgmcu.h
.............\.........\...................\...\stm32f2xx_dcmi.h
.............\.........\...................\...\stm32f2xx_dma.h
.............\.........\...................\...\stm32f2xx_exti.h
.............\.........\...................\...\stm32f2xx_flash.h
.............\.........\...................\...\stm32f2xx_fsmc.h
.............\.........\...................\...\stm32f2xx_gpio.h
.............\.........\...................\...\stm32f2xx_hash.h
.............\.........\...................\...\stm32f2xx_i2c.h
.............\.........\...................\...\stm32f2xx_iwdg.h
.............\.........\...................\...\stm32f2xx_pwr.h
.............\.........\...................\...\stm32f2xx_rcc.h
.............\.........\...................\...\stm32f2xx_rng.h
.............\.........\...................\...\stm32f2xx_rtc.h
.............\.........\...................\...\stm32f2xx_sdio.h
.............\.........\...................\...\stm32f2xx_spi.h
.............\.........\...................\...\stm32f2xx_syscfg.h
.............\.........\...................\...\stm32f2xx_tim.h
.............\.........\...................\...\stm32f2xx_usart.h
.............\.........\...................\...\stm32f2xx_wwdg.h
.............\.........\...................\src
.............\.........\...................\...\misc.c
.............\.........\...................\...\stm32f2xx_adc.c
.............\.........\...................\...\stm32f2xx_can.c
.............\.........\...................\...\stm32f2xx_crc.c
.............\.........\...................\...\stm32f2xx_cryp.c
.............\.........\...................\...\stm32f2xx_cryp_aes.c
.............\.........\...................\...\stm32f2xx_cryp_des.c
.............\.........\...................\...\stm32f2xx_cryp_tdes.c
.............\.........\...................\...\stm32f2xx_dac.c
.............\.........\...................\...\stm32f2xx_dbgmcu.c
.............\.........\...................\...\stm32f2xx_dcmi.c
.............\.........\...................\...\stm32f2xx_dma.c
.............\.........\...................\...\stm32f2xx_exti.c
.............\.........\...................\...\stm32f2xx_flash.c
.............\.........\...................\...\stm32f2xx_fsmc.c
.............\.........\...................\...\stm32f2xx_gpio.c
.............\.........\...................\...\stm32f2xx_hash.c
.............\.........\...................\...\stm32f2xx_hash_md5.c
.............\.........\...................\...\stm32f2xx_hash_sha1.c
.............\.........\...................\...\stm32f2xx_i2c.c
.............\.........\...................\...\stm32f2xx_iwdg.c
.............\.........\...................\...\stm32f2xx_pwr.c
.............\.........\...................\...\stm32f2xx_rcc.c
.............\.........\...................\...\stm32f2xx_rng.c
.............\.........\...................\...\stm32f2xx_rtc.c
.............

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