Combining two discrete SERIN bytes

PKilbourn

In my application, using SERIN, my BS2 is receiving two 8-bit bytes, for example "05" and "D0".· The serial sender convention is that a HEX (base 16) word is meaningful.· In this example, the sender wants me to receive 05D0, which equates to 1488.· I am trying to determine how PBasic can combine (convert?) the two bytes to a single base 16 byte.
I am using a simple SERIN command: SERIN RxDs, B2400, [noparse][[/noparse]char1, char2].
For information, the sender is a USDigital A2 optical encoder, being used to measure the angle of rotation of a rotating assembly.

Mike Green

Declare a word variable, like VALUE. You can then write SERIN RxDs, B2400, [noparse][[/noparse] VALUE.HIGHBYTE, VALUE.LOWBYTE ]

This uses the first received byte as the high order 8 bits and the 2nd received byte as the low order 8 bits.
Obviously, if your data comes in the opposite order, reverse the items. You can then refer to the 16 bit
value as VALUE.

PKilbourn

Thank you, Mike, for digesting my concern, and crafting a reply.

I don't know if it is the best way, but I found a way to make things work.· I took the first byte, took the last nib, and then shifted it left 8 bits.· I then XOR'ed it with the second byte.· For example, this took 05 and D5 to become 5D5, which I then assigned to a variable.· I'm happy; it worked.· Now I can proceed with the guts of the thing; making the algorithms work.

PKilbourn

Mike,

Thanks very much for the VALUE.HIGHBYTE and VALUE.LOWBYTE approach.· Far more simple than my work-around.· It worked fine and saved unnecessary lines of code.

Payne