基于STM32 keil mdk4开发平台RS485通讯测试程序，很经典值得参考
资源文件列表
485_test/CORE/core_cm3.c , 17273
485_test/CORE/core_cm3.h , 85714
485_test/CORE/startup_stm32f10x_hd.s , 15503
485_test/CORE/startup_stm32f10x_md.s , 12765
485_test/HARDWARE/KEY/key.c , 1813
485_test/HARDWARE/KEY/key.h , 1114
485_test/HARDWARE/LCD/font.h , 16156
485_test/HARDWARE/LCD/lcd.c , 82493
485_test/HARDWARE/LCD/lcd.h , 9283
485_test/HARDWARE/LED/led.c , 1298
485_test/HARDWARE/LED/led.h , 638
485_test/HARDWARE/RS485/rs485.c , 3871
485_test/HARDWARE/RS485/rs485.h , 603
485_test/keilkilll.bat , 399
485_test/OBJ/RS485.hex , 82332
485_test/STM32F10x_FWLib/inc/misc.h , 8982
485_test/STM32F10x_FWLib/inc/stm32f10x_adc.h , 21690
485_test/STM32F10x_FWLib/inc/stm32f10x_bkp.h , 7555
485_test/STM32F10x_FWLib/inc/stm32f10x_can.h , 27559
485_test/STM32F10x_FWLib/inc/stm32f10x_cec.h , 6573
485_test/STM32F10x_FWLib/inc/stm32f10x_crc.h , 2162
485_test/STM32F10x_FWLib/inc/stm32f10x_dac.h , 15233
485_test/STM32F10x_FWLib/inc/stm32f10x_dbgmcu.h , 3818
485_test/STM32F10x_FWLib/inc/stm32f10x_dma.h , 20754
485_test/STM32F10x_FWLib/inc/stm32f10x_exti.h , 6824
485_test/STM32F10x_FWLib/inc/stm32f10x_flash.h , 25445
485_test/STM32F10x_FWLib/inc/stm32f10x_fsmc.h , 27016
485_test/STM32F10x_FWLib/inc/stm32f10x_gpio.h , 20175
485_test/STM32F10x_FWLib/inc/stm32f10x_i2c.h , 30029
485_test/STM32F10x_FWLib/inc/stm32f10x_iwdg.h , 3828
485_test/STM32F10x_FWLib/inc/stm32f10x_pwr.h , 4383
485_test/STM32F10x_FWLib/inc/stm32f10x_rcc.h , 30452
485_test/STM32F10x_FWLib/inc/stm32f10x_rtc.h , 3857
485_test/STM32F10x_FWLib/inc/stm32f10x_sdio.h , 21863
485_test/STM32F10x_FWLib/inc/stm32f10x_spi.h , 17725
485_test/STM32F10x_FWLib/inc/stm32f10x_tim.h , 52427
485_test/STM32F10x_FWLib/inc/stm32f10x_usart.h , 16548
485_test/STM32F10x_FWLib/inc/stm32f10x_wwdg.h , 2966
485_test/STM32F10x_FWLib/src/misc.c , 7046
485_test/STM32F10x_FWLib/src/stm32f10x_adc.c , 47201
485_test/STM32F10x_FWLib/src/stm32f10x_bkp.c , 8463
485_test/STM32F10x_FWLib/src/stm32f10x_can.c , 45103
485_test/STM32F10x_FWLib/src/stm32f10x_cec.c , 11656
485_test/STM32F10x_FWLib/src/stm32f10x_crc.c , 3347
485_test/STM32F10x_FWLib/src/stm32f10x_dac.c , 19087
485_test/STM32F10x_FWLib/src/stm32f10x_dbgmcu.c , 5149
485_test/STM32F10x_FWLib/src/stm32f10x_dma.c , 29607
485_test/STM32F10x_FWLib/src/stm32f10x_exti.c , 6959
485_test/STM32F10x_FWLib/src/stm32f10x_flash.c , 62551
485_test/STM32F10x_FWLib/src/stm32f10x_fsmc.c , 35484
485_test/STM32F10x_FWLib/src/stm32f10x_gpio.c , 23221
485_test/STM32F10x_FWLib/src/stm32f10x_i2c.c , 45781
485_test/STM32F10x_FWLib/src/stm32f10x_iwdg.c , 4916
485_test/STM32F10x_FWLib/src/stm32f10x_pwr.c , 8759
485_test/STM32F10x_FWLib/src/stm32f10x_rcc.c , 51271
485_test/STM32F10x_FWLib/src/stm32f10x_rtc.c , 8598
485_test/STM32F10x_FWLib/src/stm32f10x_sdio.c , 28933
485_test/STM32F10x_FWLib/src/stm32f10x_spi.c , 30224
485_test/STM32F10x_FWLib/src/stm32f10x_tim.c , 109159
485_test/STM32F10x_FWLib/src/stm32f10x_usart.c , 38308
485_test/STM32F10x_FWLib/src/stm32f10x_wwdg.c , 5735
485_test/SYSTEM/delay/delay.c , 5037
485_test/SYSTEM/delay/delay.h , 1517
485_test/SYSTEM/sys/sys.c , 616
485_test/SYSTEM/sys/sys.h , 2672
485_test/SYSTEM/usart/usart.c , 5177
485_test/SYSTEM/usart/usart.h , 1303
485_test/USER/main.c , 1845
485_test/USER/RS485.Opt , 2425
485_test/USER/RS485.Uv2 , 3771
485_test/USER/stm32f10x.h , 633941
485_test/USER/stm32f10x_conf.h , 3273
485_test/USER/stm32f10x_it.c , 2418
485_test/USER/stm32f10x_it.h , 1983
485_test/USER/system_stm32f10x.c , 36577
485_test/USER/system_stm32f10x.h , 2085
485_test/USMART/readme.txt , 2566
485_test/USMART/usmart.c , 15580
485_test/USMART/usmart.h , 5483
485_test/USMART/usmart_config.c , 2176
485_test/USMART/usmart_str.c , 11560
485_test/USMART/usmart_str.h , 3233