receiving data problem of 8051

[anasfuad33eng]

hi,all i want to ask if i use usb to rs232 adapter will change the bits pattern of my binary data when i send binary byte from matlab via usb to rs232 adapter im try and try all formats of fwrite function to send binary data from matlab and display it to 8051 leds .i notice when i seend fwrite(s,00000001,'uint8') i receive 00000110 is the data change because i use usb to rs232 adapter or not? i think my 8051 kit company change the circut
of TXD,RXD pins the circut of my kit below please can any body to help me why when i send data from matlab i cant recieve the same data (i recieve other data)

 

[IanP]

First make sure that the baud rates at both ends are the same, and that the PC is sending a frame in the identical format with the 8051 (eg. 1 start-bit, 8 data bits, and 1 stop-bit) …
:wink:
IanP