usb to serial and back on the fly with ucase$

[Darrel Taylor]

It looks like the External USB Transceiver pins are active. (VPO VMO etc.)

Have you changed the UCFG register?
You should not.

[f_lez]

It looks like the External USB Transceiver pins are active. (VPO VMO etc.)

Have you changed the UCFG register?
You should not.

it has a ucfg register? i just downloaded the usbcdc demo and compiled it, when i said i fixed the incs i meant the inc issue with the 18f2550 fuses and the invalid path in one of the incs i found.



by flashing the leds on portb etc i know i am running internally at the right speed so my clock divs are ok.

all i have is pic on a board with leds on the ports and a usb connector, nothing fancy, was hoping to achive success with the KISS principle..

precompiled stuff seems to work, i used this board about two years ago with the simple usb demo, but i need to make it do serial...

I did just find another path {c:\pbp\pic¬1.47\} that i need to edit but the phone just went and i have to go drive someone shopping!

thanks for the reply, i'll update when they stop dragging me back to the real world

[f_lez]

ok now i want to scream at it..........

buffer	Var	Byte[16]
cnt	Var	Byte
flash var byte   

LED0	Var	PORTB.0
LED1	Var	PORTB.1
LED2	Var	PORTB.2
LED3	Var	PORTB.3
LED4	Var	PORTB.4
 
CMCON = 7            ; turn off comparators 
ADCON1 = 15            ; turn off analog inputs

define OSC 48

trisa=0
trisb=0

    high led0
    high led1
    high led2
    high led3
    high led4

pause (1000)
    low led4
pause (1000)
    low led3
pause (1000)
    low led2
pause (1000)
    low led1
pause (1000)
    low led0
pause (1000)  ; end of the pretty countdown


    portb=9
    pause 1000
   ; usbinit
    portb=8 
    pause 1000   ; never gets to here if i un-rem usbinit
    portb=16

; Wait for USB input
idleloop:
;   USBService	' Must service USB regularly
;	cnt = 16	' Specify input buffer size
    
    if flash=0 then
	portb=1
	flash=1
	else
	portb=0
	flash=0
	endif
;	
;   USBIn 3, buffer, cnt, idleloop

pause 1250
    goto idleloop

with the usb bits rem'd out, the led's flash as expected, as soon as i un=rem usbinit, it hangs at usbinit

[f_lez]

actually, after displaying '9' on portb, it goes immeditaly to showing '1', and i mean immediate, no one second pause displaying '8'

to get to '1' it must pass '8', but then if it got to '1', it should flash between '1' and '0'.........and it does not - ant that last pause is 125 not 1250........

now i am confused

[Darrel Taylor]

I see that you changed the label Loop to IdleLoop.

Was that because you have PBP 2.60?

If so, you'll need to make some changes.
USB is different now.

ADDED: If it is 2.60 ... Check out this ...
http://www.picbasic.co.uk/forum/show...0301#post80301

[f_lez]

I see that you changed the label Loop to IdleLoop.

Was that because you have PBP 2.60?

If so, you'll need to make some changes.
USB is different now.

ADDED: If it is 2.60 ... Check out this ...
http://www.picbasic.co.uk/forum/show...0301#post80301

no it was idleloop as down loaded from here
http://www.melabs.com/resources/samp...pbp/usbcdc.bas

' USB sample 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.

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] = "H"
	buffer[1] = "e"
	buffer[2] = "l"
	buffer[3] = "l"
	buffer[4] = "o"
	buffer[5] = " "
	buffer[6] = "W"
	buffer[7] = "o"
	buffer[8] = "r"
	buffer[9] = "l"
	buffer[10] = "d"
	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

using 2.47

I changed the chip type to 2550 in MCS, copied the usb support files into my pbp directory, and compiled..


hey prestnot......

so added a few led statements and lost more hair, and i'm still here, its not going to win the war, battles its winning on but i'm not keeping count....

is there any fuses that may stop usb working ?

maybe i have something wrong in that area because the basic programs so short theres not a lot of possibility of error, so thinking its something thats not to be seen going on, or not going on.

[Darrel Taylor]

I changed the chip type to 2550 in MCS, copied the usb support files into my pbp directory, and compiled..

Did you read the USB.TXT file?
They don't go in the PBP folder. They go in your project's folder.
Now you've messed up the .bas files for all the USB chips, and will have to restore them from the CD or a backup.

Did you modify the USBDESC.ASM file to point to the CDC descriptors?

Do you have a .22uF or higher capacitor on VUSB?

Are your configs set for a 4Mhz crystal, with USB regulator enabled?

ASM
        __CONFIG    _CONFIG1L, _PLLDIV_1_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
        __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
        __CONFIG    _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _VREGEN_ON_2L
ENDASM

And restore the program back to what it was originally (download it again).
It won't work the way you've modified it.