Serial port 2, serial port 3, serial port 4, and send data, and then the serial port 5, forwarded the serial port 1, serial port 2, serial port 3, the serial port 4 to receive the data. STM32F407 series single-chip multi-serial transceiver test code, serial port 1,

Project\CORE\core_cm4.h
.......\....\core_cm4_simd.h
.......\....\core_cmFunc.h
.......\....\core_cmInstr.h
.......\....\startup_stm32f40_41xxx.s
.......\FWLIB\STM32F4x7_ETH_Driver\inc\stm32f4x7_eth.h
.......\.....\....................\...\stm32f4x7_eth_conf.h
.......\.....\....................\src\stm32f4x7_eth.c
.......\.....\........x_StdPeriph_Driver\inc\misc.h
.......\.....\..........................\...\stm32f4xx_adc.h
.......\.....\..........................\...\stm32f4xx_can.h
.......\.....\..........................\...\stm32f4xx_crc.h
.......\.....\..........................\...\stm32f4xx_cryp.h
.......\.....\..........................\...\stm32f4xx_dac.h
.......\.....\..........................\...\stm32f4xx_dbgmcu.h
.......\.....\..........................\...\stm32f4xx_dcmi.h
.......\.....\..........................\...\stm32f4xx_dma.h
.......\.....\..........................\...\stm32f4xx_dma2d.h
.......\.....\..........................\...\stm32f4xx_exti.h
.......\.....\..........................\...\stm32f4xx_flash.h
.......\.....\..........................\...\stm32f4xx_flash_ramfunc.h
.......\.....\..........................\...\stm32f4xx_fmc.h
.......\.....\..........................\...\stm32f4xx_fsmc.h
.......\.....\..........................\...\stm32f4xx_gpio.h
.......\.....\..........................\...\stm32f4xx_hash.h
.......\.....\..........................\...\stm32f4xx_i2c.h
.......\.....\..........................\...\stm32f4xx_iwdg.h
.......\.....\..........................\...\stm32f4xx_ltdc.h
.......\.....\..........................\...\stm32f4xx_pwr.h
.......\.....\..........................\...\stm32f4xx_rcc.h
.......\.....\..........................\...\stm32f4xx_rng.h
.......\.....\..........................\...\stm32f4xx_rtc.h
.......\.....\..........................\...\stm32f4xx_sai.h
.......\.....\..........................\...\stm32f4xx_sdio.h
.......\.....\..........................\...\stm32f4xx_spi.h
.......\.....\..........................\...\stm32f4xx_syscfg.h
.......\.....\..........................\...\stm32f4xx_tim.h
.......\.....\..........................\...\stm32f4xx_usart.h
.......\.....\..........................\...\stm32f4xx_wwdg.h
.......\.....\..........................\src\misc.c
.......\.....\..........................\...\stm32f4xx_adc.c
.......\.....\..........................\...\stm32f4xx_can.c
.......\.....\..........................\...\stm32f4xx_crc.c
.......\.....\..........................\...\stm32f4xx_cryp.c
.......\.....\..........................\...\stm32f4xx_cryp_aes.c
.......\.....\..........................\...\stm32f4xx_cryp_des.c
.......\.....\..........................\...\stm32f4xx_cryp_tdes.c
.......\.....\..........................\...\stm32f4xx_dac.c
.......\.....\..........................\...\stm32f4xx_dbgmcu.c
.......\.....\..........................\...\stm32f4xx_dcmi.c
.......\.....\..........................\...\stm32f4xx_dma.c
.......\.....\..........................\...\stm32f4xx_dma2d.c
.......\.....\..........................\...\stm32f4xx_exti.c
.......\.....\..........................\...\stm32f4xx_flash.c
.......\.....\..........................\...\stm32f4xx_flash_ramfunc.c
.......\.....\..........................\...\stm32f4xx_fmc.c
.......\.....\..........................\...\stm32f4xx_fsmc.c
.......\.....\..........................\...\stm32f4xx_gpio.c
.......\.....\..........................\...\stm32f4xx_hash.c
.......\.....\..........................\...\stm32f4xx_hash_md5.c
.......\.....\..........................\...\stm32f4xx_hash_sha1.c
.......\.....\..........................\...\stm32f4xx_i2c.c
.......\.....\..........................\...\stm32f4xx_iwdg.c
.......\.....\..........................\...\stm32f4xx_ltdc.c
.......\.....\..........................\...\stm32f4xx_pwr.c
.......\.....\..........................\...\stm32f4xx_rcc.c
.......\.....\..........................\...\stm32f4xx_rng.c
.......\.....\..........................\...\stm32f4xx_rtc.c
.......\.....\..........................\...\stm32

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