This program completed the STM32F405RG 485 driver, you can use printf function output.

STM32F405RG- 485
STM32F405RG- 485\Libraries
STM32F405RG- 485\Libraries\CMSIS
STM32F405RG- 485\Libraries\CMSIS\Device
STM32F405RG- 485\Libraries\CMSIS\Device\ST
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Include
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h~RFf4548ea.TMP
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Include\system_stm32f4xx.h
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Release_Notes.html
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f4xx.s
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f4xx.s
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar\startup_stm32f4xx.s
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\system_stm32f4xx.c
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TASKING
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TASKING\cstart_thumb2.asm
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TrueSTUDIO
STM32F405RG- 485\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\TrueSTUDIO\startup_stm32f4xx.s
STM32F405RG- 485\Libraries\CMSIS\Include
STM32F405RG- 485\Libraries\CMSIS\Include\arm_common_tables.h
STM32F405RG- 485\Libraries\CMSIS\Include\arm_math.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cm0.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cm3.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cm4.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cm4_simd.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cmFunc.h
STM32F405RG- 485\Libraries\CMSIS\Include\core_cmInstr.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\misc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_adc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_can.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_crc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_cryp.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dac.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dbgmcu.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dcmi.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_dma.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_exti.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_flash.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_fsmc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_gpio.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_hash.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_i2c.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_iwdg.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_pwr.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rcc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rng.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_rtc.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_sdio.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_spi.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_syscfg.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_tim.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_usart.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\inc\stm32f4xx_wwdg.h
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\Release_Notes.html
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\misc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_adc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_can.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_crc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_aes.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_des.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_cryp_tdes.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dac.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dbgmcu.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dcmi.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_dma.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_exti.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_flash.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_fsmc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_gpio.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash_md5.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_hash_sha1.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_i2c.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_iwdg.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_pwr.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rcc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rng.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_rtc.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_sdio.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_spi.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_syscfg.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_tim.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_usart.c
STM32F405RG- 485\Libraries\STM32F4xx_StdPeriph_Driver\src\stm32f4xx_wwdg.c
STM32F405RG- 485\Project
STM32F405RG- 485\Project\Listing
STM32F405RG- 485\Project\Listing\Project.map
STM32F405RG- 485\Project\Listing\startup_stm32f2xx.lst
STM32F405RG- 485\Project\Listing\startup_stm32f4xx.lst
STM32F405RG- 485\Project\Output

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