Use STM32 timers 1 and USART1 implement MODBUS slave function, with read coil, write coil, a single register read and write single register functions, strictly follow the ModBus communications specifications.

modbus从站STM32\Dev_Driver\inc\Device.h
...............\..........\...\Gpio.h
...............\..........\...\LCD.h
...............\..........\...\Modbus.h
...............\..........\...\Usart.h
...............\..........\src\Device.c
...............\..........\...\Gpio.c
...............\..........\...\LCD.c
...............\..........\...\Modbus.c
...............\..........\...\Usart.c
...............\EWARM\Debug\Exe\test.out
...............\.....\.....\Obj\8025.pbi.cout
...............\.....\.....\...\core_cm3.o
...............\.....\.....\...\core_cm3.pbi
...............\.....\.....\...\core_cm3.pbi.cout
...............\.....\.....\...\Device.o
...............\.....\.....\...\Device.pbi
...............\.....\.....\...\Device.pbi.cout
...............\.....\.....\...\Gpio.o
...............\.....\.....\...\Gpio.pbi
...............\.....\.....\...\Gpio.pbi.cout
...............\.....\.....\...\I2C_Driver.pbi.cout
...............\.....\.....\...\LCD.o
...............\.....\.....\...\LCD.pbi
...............\.....\.....\...\LCD.pbi.cout
...............\.....\.....\...\main.o
...............\.....\.....\...\main.pbi
...............\.....\.....\...\main.pbi.cout
...............\.....\.....\...\misc.o
...............\.....\.....\...\misc.pbi
...............\.....\.....\...\misc.pbi.cout
...............\.....\.....\...\Modbus.o
...............\.....\.....\...\Modbus.pbi
...............\.....\.....\...\Modbus.pbi.cout
...............\.....\.....\...\startup_stm32f10x_cl.o
...............\.....\.....\...\startup_stm32f10x_hd.o
...............\.....\.....\...\startup_stm32f10x_md.o
...............\.....\.....\...\stm32f10x_adc.o
...............\.....\.....\...\stm32f10x_adc.pbi
...............\.....\.....\...\stm32f10x_adc.pbi.cout
...............\.....\.....\...\stm32f10x_bkp.o
...............\.....\.....\...\stm32f10x_bkp.pbi.cout
...............\.....\.....\...\stm32f10x_exti.o
...............\.....\.....\...\stm32f10x_exti.pbi.cout
...............\.....\.....\...\stm32f10x_fsmc.o
...............\.....\.....\...\stm32f10x_fsmc.pbi
...............\.....\.....\...\stm32f10x_fsmc.pbi.cout
...............\.....\.....\...\stm32f10x_gpio.o
...............\.....\.....\...\stm32f10x_gpio.pbi
...............\.....\.....\...\stm32f10x_gpio.pbi.cout
...............\.....\.....\...\stm32f10x_it.o
...............\.....\.....\...\stm32f10x_it.pbi
...............\.....\.....\...\stm32f10x_it.pbi.cout
...............\.....\.....\...\stm32f10x_pwr.o
...............\.....\.....\...\stm32f10x_pwr.pbi.cout
...............\.....\.....\...\stm32f10x_rcc.o
...............\.....\.....\...\stm32f10x_rcc.pbi
...............\.....\.....\...\stm32f10x_rcc.pbi.cout
...............\.....\.....\...\stm32f10x_rtc.o
...............\.....\.....\...\stm32f10x_rtc.pbi.cout
...............\.....\.....\...\stm32f10x_tim.o
...............\.....\.....\...\stm32f10x_tim.pbi
...............\.....\.....\...\stm32f10x_tim.pbi.cout
...............\.....\.....\...\stm32f10x_usart.o
...............\.....\.....\...\stm32f10x_usart.pbi
...............\.....\.....\...\stm32f10x_usart.pbi.cout
...............\.....\.....\...\system_stm32f10x.o
...............\.....\.....\...\system_stm32f10x.pbi
...............\.....\.....\...\system_stm32f10x.pbi.cout
...............\.....\.....\...\test.pbd
...............\.....\.....\...\test.pbd.browse
...............\.....\.....\...\Usart.o
...............\.....\.....\...\Usart.pbi
...............\.....\.....\...\Usart.pbi.cout
...............\.....\EW65A3.tmp
...............\.....\Project.eww
...............\.....\Release\Obj\core_cm3.pbi
...............\.....\.......\...\core_cm3.pbi.cout
...............\.....\.......\...\Gpio.pbi
...............\.....\.......\...\Gpio.pbi.cout
...............\.....\.......\...\LCD.pbi
...............\.....\.......\...\LCD.pbi.cout
...............\.....\.......\...\misc.pbi
...............\.....\.......\...\misc.pbi.cout
...............\.....\.......\...\stm32f10x_fsmc.pbi
...............\.....\.......\...\stm32f10x_fsmc.pbi.cout
...............\.....\.......\...\stm32f10x_gpio.pbi
...............\.....\

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