ARM monitors the serial port, the received characters are sent to a character and then sent to the serial port, ie the PC keyboard to send data via HyperTerminal, the board will receive the data and then back to the PC, in the HyperTerminal display.

Exp1 ARM串口实验
................\Exp1.mcp
................\Exp1_Data
................\.........\CWSettingsWindows.stg
................\.........\Debug
................\.........\.....\Exp1.axf
................\.........\.....\ObjectCode
................\.........\.....\..........\cpu.o
................\.........\.....\..........\exception.o
................\.........\.....\..........\heap.o
................\.........\.....\..........\ISR.o
................\.........\.....\..........\lib.o
................\.........\.....\..........\main.o
................\.........\.....\..........\pagetable.o
................\.........\.....\..........\retarget.o
................\.........\.....\..........\stack.o
................\.........\.....\..........\Startup.o
................\.........\.....\..........\UHAL.o
................\.........\.....\system.bin
................\.........\.....\TargetDataWindows.tdt
................\.........\Release
................\.........\.......\TargetDataWindows.tdt
................\inc
................\...\bitfield.h
................\...\cpu.h
................\...\gpio.h
................\...\lib.h
................\...\reg2410.h
................\init
................\....\exception.s
................\....\heap.s
................\....\pagetable.s
................\....\readme.txt
................\....\retarget.c
................\....\scat_ram.scf
................\....\scat_ram_release.scf
................\....\scat_rom.scf
................\....\stack.s
................\src
................\...\cpu.c
................\...\lib.c
................\...\main.c
................\startup
................\.......\2410addr.s
................\.......\Startup.s
................\uhal
................\....\isr.c
................\....\UHAL.c

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