SC44B0的测试程序，此程序为4*4键盘的测试程序，基于扫描式读取键值并在LED上显示文件列表: key ...\1.mak ...\1.mpj ...\1.mws ...\DbgRam ...\......\1.elf ...\......\1.mpj ...\......\1.mws ...\......\ldscript_ram.ld ...\......\ldscript_rom.ld ...\......\main44b0.o ...\......\uart_ev44b0.o ...\EV44B0.INC ...\hw_init44b0.S ...\init_ram.S ...\key.C ...\key.C.bak ...\ldscript_ram.ld ...\ldscript_rom.ld ...\main44b0.c ...\uart_ev44b0.c ...\uart_ev44b0.h……