Serin Help - ASCII to Decimal

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- 12th October 2009, 17:07
Dino308gt4

Serin Help - ASCII to Decimal

I've Googled till my fingers bled, but still can't get this to work. I'm reading serial data from a Windows XP machine in the following format: "F100". I'm using serin on a 16f877. The data is being sent as characters from the Window machine.

<code>
Byte1 var Byte
Byte2 var Byte

Serin 1,N2400, Byte1, Byte2
</code>

I want to read Byte1 as "F", and Byte2 as decimal 100. I can read the "F", but I'm not sure how to get the 100 as a number. I've tried # and []. Should be easy right? So far I'm failing miserably!

Can anyone help? Thank you in advance.
- 12th October 2009, 17:55
Kamikaze47

if the pc is sending the ascii characters F 1 0 0 then it is actually sending four bytes.

you can either receive all four and then use some math to translate the characters 1 0 0 into a decimal 100, or if you can change what the PC is sending, you can send F d since ascii d is decimal 100.
- 12th October 2009, 17:59
aratti

In order to receive "F100" you need 4 bytes "F" "1" "0" "0" , so try

Byte1 var Byte
Byte2 var Byte
Byte3 var Byte
Byte4 var Byte

Serin 1,N2400, Byte1, Byte2, Byte3, Byte4

Al.
- 12th October 2009, 18:01
Dino308gt4

That makes perfect sense (both replies). Thank you for your help!
- 12th October 2009, 22:17
Darrel Taylor

Or maybe ...

Code:

Byte1 var Byte Byte2 var Byte SERIN2 1, 16780,[Byte1, DEC3 Byte2]
- 12th October 2009, 23:00
Dino308gt4

Quote:

Originally Posted by Darrel Taylor

Or maybe ...

Code:

Byte1 var Byte Byte2 var Byte SERIN2 1, 16780,[Byte1, DEC3 Byte2]

I'll try this. Thank you.