USB Pic Basic Pro Serial Data Gönderimi

18F4550 microcontroller ile USB denemeleri için bir pic basic pro
derlemesi örneği altta görülüyor.
18F4550 yerine 18F2550 de kullanılabilir. 18F2550 yi kullanırken
derlemede ve chip device seçeneğinde değiştirmeyi unutmayın.

' Name        : USBCDC.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : MPASM
' Target PIC  : PIC18F4550 or similar type
' Hardware    : LAB-XUSB Experimenter Board
' Oscillator  : 20MHz external
' Keywords    : USBSERVICE, USBINIT, USBIN, USBOUT
' Description : PICBASIC PRO program for PIC18F4550 CDC serial port emulation.
' Compilation of this program requires that specific support files be available
' in the source directory. You may also need to modify the file USBDESC.ASM so
' that the proper descriptor files are included. For detailed information, see
' the file PBP\USB18\USB.TXT.
'

Include "cdc_desc.bas" ' Include the HID descriptors

buffer Var Byte[16]
cnt    Var Byte
LED    Var PORTB.0

Define OSC 48

   USBInit
   Low LED      ' LED off

' Wait for USB input
idleloop:
   USBService   ' Must service USB regularly
   cnt = 16     ' Specify input buffer size
   USBIn 3, buffer, cnt, idleloop

' Message received
   Toggle LED

   buffer[0] = "M"
   buffer[1] = "e"
   buffer[2] = "r"
   buffer[3] = "h"
   buffer[4] = "a"
   buffer[5] = "b"
   buffer[6] = "a"
   buffer[7] = ""
   buffer[8] = "U"
   buffer[9] = "S"
   buffer[10] = "B"
   buffer[11] = 13
   buffer[12] = 10
   buffer[13] = 0

outloop:
   USBService           ' Must service USB regularly
   USBOut 3, buffer, 14, outloop
   Goto idleloop        ' Wait for next buffer

   End