' Name        : SERIN.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : PM or MPASM
' Target PIC  : 12F, 16F, 18F
' Hardware    : PC serial connection for result display
' Oscillator  : 4MHz internal or external
' Keywords    : SERIN, SEROUT
' Description : PICBASIC PRO Code that demonstrates the use of SERIN & SEROUT commands
' with UPPER CASE serial filter.
'

Include "modedefs.bas"  ' Include serial modes

SO Con 0                ' Define serial out pin
SI Con 1                ' Define serial in pin
B0 Var byte

mainloop:
   Serin SI,N2400,B0    ' B0 = input character
   If (B0 < "a") or (B0 > "z") Then print  ' If lower case, convert to upper
   B0 = B0 - $20

print:
   Serout SO,N2400,[B0] ' Send character
   Goto mainloop        ' Forever

   End