I used the KEIL software to program the AT89C51ED2 chip, and I
used the USB port to view the data transfer by PUTTY. But in the
PUTTY, I can't get accurate information.
The code looks fine, the COM port is also set successfully, there
was no problem with the connection of the circuit, but there has a
problem in the display of putty.
In the PUTTY, according to ASCII. enter a should get b. but in
here a got q, b got r, d got t, and GPRMC got w\SM{
is UART have the problem? or
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