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How to send an array of data from PC to 89C51 via RS232?

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Hello,
This reason mybe:
1. The wrong connection with RS232 cable

Please test your cable from computer COM1/COM2, with the end of cable not connect to MCU but connect with cable DB9 pin 2 and pin 3.

And open the hyper terminal with 9600,n,8,1. Type some char from keyboard, you mast see some char echo in hyperterminal dump window.

2. The wrong setting in hyper terminal. Please set the handshaking with "NONE" Setiing.

I try it with no any problem.

THX
 

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