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SX28 serin question — Parallax Forums

SX28 serin question

martinbushnellmartinbushnell Posts: 1
edited 2013-12-23 17:09 in General Discussion
I know that much has been written about SERIN for the SX28 but I'm a bit confused about the subroutine required for receiving strings.
Can anyone suggest how I recreate the following statement from a Stamp BS2 programme for use with the SX28

SERIN rxpin, baud, [WAIT("SENDRX")]

Many thanks

Martin

Comments

  • ZootZoot Posts: 2,227
    edited 2013-12-23 17:09
    SERIN just gets a byte, so you generally want to wrap it in a subroutine. Presume that each call to my_ser_in gets one byte
    
Main:


Wait_For_Header:
    tmpB1 = my_ser_in
    IF tmpB1 <> "S" THEN Wait_For_Header
    tmpB1 = my_ser_in
    IF tmpB1 <> "E" THEN Wait_For_Header
    tmpB1 = my_ser_in
    IF tmpB1 <> "N" THEN Wait_For_Header
    tmpB1 = my_ser_in
    IF tmpB1 <> "D" THEN Wait_For_Header
    tmpB1 = my_ser_in
    IF tmpB1 <> "R" THEN Wait_For_Header
    tmpB1 = my_ser_in
    IF tmpB1 <> "X" THEN Wait_For_Header
' only here if correct header received, so next two bytes (??) are data

    tmpB1 = my_ser_in
    tmpB2 = my_ser_in

   IF tmpB1= "." THEN Do_Something
   IF tmpB1= "," THEN Do_Something_Else

' etc

  GOTO Main



FUNCTION my_ser_in
     SERIN ..... your code into one byte, say, "tmpB1"
     RETURN tmpB1
     ENDFUNC
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