USB CDC Communications for Dummies!

[xkocik00]

Hi guys,
can you help me with program USB CDC Communicator on uC PIC18F47J53?
I never use USB, this is my first try.
I tried use the sample code from USB18 (CDC_demo). I tried rewrite the code but without success.
Thx.

[xkocik00]

Proglem solved:

Must use #congif for PIC.

' USB sample program for PIC18F47J53 CDC serial port emulation
' Requires PBP 2.60 or later

Include "cdc_desc.bas" ' Include the HID descriptors

Define OSC 48

#CONFIG
CONFIG WDTEN = OFF ;WDT disabled (enabled by SWDTEN bit)
CONFIG PLLDIV = 3 ;Divide by 3 (12 MHz oscillator input)
CONFIG STVREN = ON ;stack overflow/underflow reset enabled
CONFIG XINST = OFF ;Extended instruction set disabled
CONFIG CPUDIV = OSC1 ;No CPU system clock divide
CONFIG CP0 = OFF ;Program memory is not code-protected
CONFIG OSC = HSPLL ;HS oscillator, PLL enabled, HSPLL used by USB
CONFIG FCMEN = OFF ;Fail-Safe Clock Monitor disabled
CONFIG IESO = OFF ;Two-Speed Start-up disabled
CONFIG WDTPS = 32768 ;1:32768
CONFIG DSWDTOSC = INTOSCREF ;DSWDT uses INTOSC/INTRC as clock
CONFIG RTCOSC = T1OSCREF ;RTCC uses T1OSC/T1CKI as clock
CONFIG DSBOREN = OFF ;Zero-Power BOR disabled in Deep Sleep
CONFIG DSWDTEN = OFF ;Disabled
CONFIG DSWDTPS = 8192 ;1:8,192 (8.5 seconds)
CONFIG IOL1WAY = OFF ;IOLOCK bit can be set and cleared
CONFIG MSSP7B_EN = MSK7 ;7 Bit address masking
CONFIG WPFP = PAGE_1 ;Write Protect Program Flash Page 0
CONFIG WPEND = PAGE_0 ;Start protection at page 0
CONFIG WPCFG = OFF ;Write/Erase last page protect Disabled
CONFIG WPDIS = OFF ;WPFP[5:0], WPEND, and WPCFG bits ignored
#ENDCONFIG


buffer Var Byte[16]
cnt Var Byte


OSCTUNE.6 = 1 ' Enable PLL for 18F47J50 family
Pause 10

USBInit ' Get USB going

'************************************************* ***************
'* Set PORTA, PORTB, PORTC, PORTD PORTE to input/output *
'************************************************* ***************
TRISA = %00100010 ' Set PORTA to output
TRISB = %00001000 ' Set PORTB to output
TRISC = %00---000 ' Set PORTC to output

PortA = %00000000 ' Set PORTA to 0
PortB = %00000000 ' Set PORTB to 0
PortC = %00000000 ' Set PORTC to 0
PortD = %00000000 ' Set PORTD to 0
PortE = %00000000 ' Set PORTE to 0


'************************************************* ***************
'* SET LCD *
'************************************************* ***************
' Define LCD registers and bits
Define LCD_DREG PORTD
Define LCD_DBIT 4
Define LCD_RSREG PORTB
Define LCD_RSBIT 0
Define LCD_EREG PORTB
Define LCD_EBIT 1
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 1500
DEFINE LCD_DATAUS 50

Pause 1000 ' Wait for LCD to start up

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

' Message received
buffer[0] = "O"
buffer[1] = "K"
buffer[2] = 13
buffer[3] = 10
buffer[4] = 0

outloop:
USBService ' Must service USB regularly
USBOut 3, buffer, 5, outloop

Goto idleloop ' Wait for next buffer

[tacbanon]

Hi.. I have windows 7 64bit machine... I download the 64_mchpcdc.inf provided by mackrackit...and copy and paste it in the Windows\sysWOW64 folder, I also reboot the machine but I'm getting exclamation icon(CDC - R232 Emulation Demo) in the devices and printers window. What do you think I'm doing bad? Please give advice.

Thanks in advance,
tacbanon

[mackrackit]

The driver provided with PBP now has 64 bit support added. So you do not need the one I linked to, although it should still work.
I think your problem might be that you copied it to a directory rather than letting the OS install it. Try deleting the file from the sysWOW directory, then do a reboot.
When your project is plugged into your PC windows should bring up the usual dialog asking to install a driver. Do not let windows look for it, point to where the file has been saved to and let windows do the installing. You then should see a virtual com-port in device manager.

[tacbanon]

Hello macrackit, thank you so much for replying...I got it working now.

[iw2fvo]

Good day,
I have PBP 250_b running on a windows_7 64 bit.
What files are required in my PBP to update it to the 2.60 version and use the USB programs ?
Where could I download them ?
Thanks for helping
Ambrogio

[mackrackit]

You will have to go to MeLabs website and pay for the upgrade.