On Mon, 21 May 2001 18:52:24 -0600, Greg Hartung wrote: >For > >ABCDEFGHIJKLMNOPQRSTUVWXYZ > >I get > >oaua?c?iuiyiyiyo?uy?yuyy > >(U and W didn't produce anything > >Raw log shows the following hex output: > >F8 E3 FC E6 FE E7 FE EC FB EF FF EE FF EF FF F8 FE FB FF FE FF FC FF FF vs. 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54;56 57;59 5A Assuming start bit is a zero, stop bit is a one, LSB transmitted first. All of the received chars have high bits set to ones, suggesting that receive bit rate is too slow. Let us take 50 xmit and F8 rcvd. Laying them out LSB on the left like an oscilloscope, the bits could possibly line up like bit 0 1 2 3 4 5 6 7 xmit 0 0 0 0 1 0 1 0 1 1 1 1 recv 0 0 0 1 1 1 1 1 Or take 44 xmit and E6 recv: bit 0 1 2 3 4 5 6 7 xmit 0 1 0 1 0 1 0 1 1 1 1 1 recv 0 1 1 0 0 1 1 1 So it looks to me like maybe the receive bit rate is approximately 2/3 of what it ought to be, relative to the transmit bit rate. Perhaps not constant. This theory does not explain all the symptoms yet, but perhaps you could check the speeds and get back to us with any more info that yields. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads