P1 port connected 8-bit light-emitting diode, P2 8 port access switch, serial port outlet and the PC-connected. Programming: MCU read from the P2 port switch status, sent to the PC via the serial port machine PC machine data sent to the microcontroller (PC machine each time you send a byte) is displayed in eight light-emitting diode. Requirements: a toggle switch to send data to a PC, do not toggle switch does not send.

8051_pc\ex11.asm
8051_pc
.......\ex11li.asm

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