SERIN2/SEROUT2 - first data received is always garbage

[picster]

Great illustration here of the need to have predefined states. I had been "tossing out" the first byte of data received, now I don't need to do that. Thanks guys.

Picster

[Scampy]

Slightly off topic, is this only true for SERIN2 / SEROUT2, and not applicable when using HSERIN / HSEROUT and the dedicated hardware /PINS on a PIC. I've always tend to use PICs with serial ports and used the excellent PIC MultiCALC tool by mister_e ( http://www.picbasic.co.uk/forum/showthread.php?t=4994 ) to give me the defines.

[Ioannis]

Depends if you use it directly on RS-232 bus or with a driver which is actually an inverter.

Bus should stay at the predefined idle state which is -12 Volts meaning that TTL logic level of the controller is at High (3 or 5 volts).

So, the answer is yes, either Serout or Hserout.

But if you drive directly the RS-232 bus, TTL should be reversed in the Serout2 setup and Hserout should only be used if there is a special setting in the PIC's UART that reverses the TTL state.

Hope this is not too complicated.

Ioannis