USB Learning

**ruijc** · - 21st July 2014, 17:20

Hi guys,

I'm trying to write a program that could send a keystroke to the PC when a button is pressed.
I have the main program figured out...the problem is the descriptor files...

These last few days i've been reading alot of posts and examples but i always end up without a way out.

Some examples i tried do not compile ( errors ), the example tutorials created by Squibcakes use software that is not avaliable anymore...the only piece of code that worked ( also tested with hardware ) is the CDC_DEMO from the PBP folder.
I tried to modify the descriptor to act as a keyboard but i cannot understand ( not the same format as the tutorials ).

Is there anyone that could help me point to the right direction with tips or examples?

I thank in advance

Best Regards
Rui

**andywpg** · - 21st July 2014, 23:12

If you find out, please share it - I started something along the same lines, and kind of got scared off by the USB part. I just want something to send one character when a button is pressed.

**ruijc** · - 21st July 2014, 23:15

These are the files i'm working with ( main code and descriptor )
The descriptor is from a different thread ( http://www.picbasic.co.uk/forum/showthread.php?t=2872 )

Main:

Code:

buffer	Var	Byte[8]
loopcnt	Var	Byte
state	Var	Byte

DEFINE OSC 48
@ __CONFIG   _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@ __CONFIG   _CONFIG1H, _FOSC_HSPLL_HS_1H
@ __CONFIG    _CONFIG2H, _WDT_OFF_2H & _WDTPS_512_2H
@ __CONFIG    _CONFIG3H, _PBADEN_OFF_3H & _MCLRE_OFF_3H 
@ __CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L &_XINST_OFF_4L

TRISB=%11111111

B1	     VAR	PORTB.0	'
B2	     VAR	PORTB.1	'
B3	     VAR	PORTB.2	'
B4	     VAR	PORTB.3	'
B5	     VAR	PORTB.4	'
B6	     VAR	PORTB.5	'
B7	     VAR	PORTB.6	'
B8	     VAR	PORTB.7	'


'	Include	"DESCKB.ASM"	' Include the HID descriptors
'	INCLUDE "USB_ASM_Service.pbp"  ; USB Init and Service interrupt routines
	Pause 10

	USBInit
	
	buffer[0] = 0
	buffer[1] = 0
	buffer[2] = 0
    buffer[3] = 0
    buffer[4] = 0
	buffer[5] = 0
	buffer[6] = 0
    buffer[7] = 0

MAIN:

IF B1=1 THEN   
  
    buffer[0] = 0   '1st byte = modifier keys (i.e. ctrl, alt, shift)
	buffer[1] = 0   '2nd byte
	buffer[2] = $14 '3rd byte = q character  
    buffer[3] = 0
    
ENDIF

IF B2=1 THEN

    buffer[0] = $2  '1st byte = modifier keys (i.e. ctrl, alt, shift)
	buffer[1] = 0   '2nd byte
	buffer[2] = $14 '3rd byte = Q character  
    buffer[3] = 0

ENDIF

IF (B1=0) AND (B2=0) THEN

    buffer[0] = 0  
	buffer[1] = 0  
	buffer[2] = 0  
    buffer[3] = 0

ENDIF

endgame:
	USBService	' Must service USB regularly
	USBOut 1, buffer, 8, endgame  ' Send buffer to endpoint 1
	while(1)
	wend
Goto MAIN	' Do it forever

Descriptor:

Code:

; KBDDESC.ASM
;
; This file contains a set of descriptors for a standard keyboard.

#define	EP0_BUFF_SIZE		8	; 8, 16, 32, or 64
#define	MAX_NUM_INT		1	; For tracking Alternate Setting
#define	MAX_EP_NUMBER		1	; UEP1
#define	NUM_CONFIGURATIONS	1
#define	NUM_INTERFACES		1

#define	MODE_PP			_PPBM0
#define	UCFG_VAL		_PUEN|_TRINT|_FS|MODE_PP	; Full-speed
;#define	UCFG_VAL		_PUEN|_TRINT|MODE_PP	; Low-speed

;#define USE_SELF_POWER_SENSE_IO
;#define USE_USB_BUS_SENSE_IO

; DEVICE CLASS USAGE
#define USB_USE_HID

; HID
; Endpoints Allocation
#define	HID_INTF_ID		0x00
#define	HID_UEP			UEP1
#define	HID_BD_OUT		ep1Bo
#define	HID_INT_OUT_EP_SIZE	8
#define	HID_BD_IN		ep1Bi
#define	HID_INT_IN_EP_SIZE	8
#define	HID_NUM_OF_DSC		1

; ******************************************************************
; This table is polled by the host immediately after USB Reset has been released.
; This table defines the maximum packet size EP0 can take.
; See section 9.6.1 of the Rev 1.0 USB specification.
; These fields are application DEPENDENT. Modify these to meet
; your specifications.
; ******************************************************************
DeviceDescriptor
	retlw	(EndDeviceDescriptor-DeviceDescriptor)/2	; bLength Length of this descriptor
	retlw	DSC_DEV		; bDescType This is a DEVICE descriptor
	retlw	0x10		; bcdUSBUSB Revision 1.10 (low byte)
	retlw	0x01		; high byte
	retlw	0x00		; bDeviceClass
	retlw	0x00		; bDeviceSubClass
	retlw	0x00		; bDeviceProtocol
	retlw	EP0_BUFF_SIZE	; bMaxPacketSize for EP0
	retlw	0xD8		; idVendor - 0x04D8 is Microchip Vendor ID (low byte)
	retlw	0x04		; (high byte)
	retlw	0x02		; idProduct (low byte)
	retlw	0x00		; (high byte)
	retlw	0x01		; bcdDevice (low byte)
	retlw	0x00		; (high byte)
	retlw	0x01		; iManufacturer
	retlw	0x02		; iProduct
	retlw	0x03		; iSerialNumber
	retlw	NUM_CONFIGURATIONS	; bNumConfigurations
EndDeviceDescriptor

; ******************************************************************
; This table is retrieved by the host after the address has been set.
; This table defines the configurations available for the device.
; See section 9.6.2 of the Rev 1.0 USB specification (page 184).
; These fields are application DEPENDENT. 
; Modify these to meet your specifications.
; ******************************************************************
; Configuration pointer table
USB_CD_Ptr
Configs
	db	low Config1, high Config1
	db	low Config1, high Config1

; Configuration Descriptor
Config1
	retlw	(Interface1-Config1)/2	; bLength Length of this descriptor
	retlw	DSC_CFG		; bDescType2 = CONFIGURATION
Config1Len
	retlw	low ((EndConfig1-Config1)/2)	; Length of this configuration
	retlw	high ((EndConfig1-Config1)/2)
	retlw	0x01		; bNumInterfaces Number of interfaces
	retlw	0x01		; bConfigValue Configuration Value
	retlw	0x04		; iConfigString Index for this config = #01
	retlw	0xA0		; bmAttributes attributes - bus powered
	retlw	0x50		; Max power consumption (2X mA)
Interface1
	retlw	(HIDDescriptor1-Interface1)/2	; length of descriptor
	retlw	DSC_INTF
	retlw	0x00		; number of interface, 0 based array
	retlw	0x00		; alternate setting
	retlw	0x01		; number of endpoints used in this interface
	retlw	0x03		; interface class - assigned by the USB
	retlw	0x01		; boot device
	retlw	0x01		; interface protocol - keyboard
	retlw	0x05		; index to string descriptor that describes this interface
HIDDescriptor1
	retlw	(Endpoint1-HIDDescriptor1)/2	; descriptor size (9 bytes)
	retlw	0x21		; descriptor type (HID)
	retlw	0x01		; HID class release number (1.00)
	retlw	0x01
	retlw	0x00		; Localized country code (none)
	retlw	0x01		; # of HID class descriptor to follow (1)
	retlw	0x22		; Report descriptor type (HID)
ReportDescriptor1Len
	retlw	low ((EndReportDescriptor1-ReportDescriptor1)/2)
	retlw	high ((EndReportDescriptor1-ReportDescriptor1)/2)
Endpoint1
	retlw	(EndConfig1-Endpoint1)/2	; length of descriptor
	retlw	DSC_EP
	retlw	0x81		; EP1, In
	retlw	0x03		; Interrupt
	retlw	0x08		; This should be the size of the endpoint buffer
	retlw	0x00
	retlw	0x0A		; polling interval (10ms)
EndConfig1

ReportDescriptor1
	retlw   0x05
	retlw   0x01    ; usage page (generic desktop)
	retlw   0x09
	retlw   0x06    ; usage (keyboard)
	retlw   0xA1
	retlw   0x01    ; collection (application)
	retlw   0x05
	retlw   0x07    ;   usage (Key codes)
	retlw   0x19
	retlw   0xE0    ;   usage minimum (224)
	retlw   0x29
	retlw   0xE7    ;   usage minimum (231)
	retlw   0x15
	retlw   0x00    ;     logical minimum (0)
	retlw   0x25
	retlw   0x01    ;     logical maximum (1)
	retlw   0x75
	retlw   0x01    ;     report size (1)
	retlw   0x95
	retlw   0x08    ;     report count (8)
	retlw   0x81
	retlw   0x02    ;     Input (data,variable,absolute)
	retlw   0x95
	retlw   0x01    ;     report count (1)
	retlw   0x75
	retlw   0x08    ;     report size (8)
	retlw   0x81
	retlw   0x01    ;     Input (constant)
	retlw   0x95
	retlw   0x05    ;     report count (5)
	retlw   0x75
	retlw   0x01    ;     report size (1)
	retlw   0x05
	retlw   0x08    ;     usage page (page# for leds)
	retlw   0x19
	retlw   0x01    ;     Usage minimum (1)
	retlw   0x29
	retlw   0x05    ;     Usage maximum (5)
	retlw   0x91
	retlw   0x02    ;     output (data,variable,absolute)
	retlw   0x95
	retlw   0x01    ;     report count (1)
	retlw   0x75
	retlw   0x03    ;     report size (3)
	retlw   0x91
	retlw   0x01    ;     output (constant)
	retlw   0x95
	retlw   0x06    ;     report count (6)
	retlw   0x75
	retlw   0x08    ;     report size (8)
	retlw   0x15
	retlw   0x00    ;     logical minimum (0)
	retlw   0x25
	retlw   0x65    ;     logical maximum (101)
	retlw   0x05
	retlw   0x07    ;     usage page (keycodes)
	retlw   0x19
	retlw   0x00    ;     usage minimum (0)
	retlw   0x29
	retlw   0x65    ;     usage maximum (101)
	retlw   0x81
	retlw   0x00    ;     input (data, array)	
	retlw   0xC0    ;   end collection
EndReportDescriptor1


langids
	retlw   low lang_1
	retlw   high lang_1
	retlw   low lang_2      ; String indexes of different languages
	retlw   high lang_2

lang_1				; English
	retlw   low  String0    ; LangIDs
	retlw   high String0
	retlw   low  String1_l1    
	retlw   high String1_l1
	retlw   low  String2_l1
	retlw   high String2_l1
	retlw   low  String3_l1
	retlw   high String3_l1
	retlw   low  String4_l1
	retlw   high String4_l1
	retlw   low  String5_l1
	retlw   high String5_l1

lang_2
	retlw   low  String0    ; Also point to LangID
	retlw   high String0
	retlw   low  String1_l2
	retlw   high String1_l2
	retlw   low  String2_l2
	retlw   high String2_l2
	retlw   low  String3_l2
	retlw   high String3_l2
	retlw   low  String4_l2
	retlw   high String4_l2
	retlw   low  String5_l2
	retlw   high String5_l2

; String pointer table
USB_SD_Ptr
Strings
	db	low String0, high String0
	db	low String1_l1, high String1_l1
	db	low String2_l1, high String2_l1
	db	low String3_l1, high String3_l1
	db	low String4_l1, high String4_l1
	db	low String5_l1, high String5_l1

String0
	retlw   (String1_l1-String0)/2	; Length of string 
	retlw   DSC_STR		; Descriptor type 3
	retlw   0x09		; Language ID (as defined by MS 0x0409)
	retlw   0x04
	retlw   0x04		; Some other language ID for testing
	retlw   0x08

String1_l1
	retlw   (String2_l1-String1_l1)/2	; Length of string
	retlw   DSC_STR		; Descriptor type 3
	retlw   'L'
	retlw   0x00
	retlw   'o'
	retlw   0x00
	retlw   'r'
	retlw   0x00
	retlw   'd'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'N'
	retlw   0x00
	retlw   'i'
	retlw   0x00
	retlw   'k'
	retlw   0x00
	retlw   'o'
	retlw   0x00
	retlw   'n'
	retlw   0x00
String2_l1
	retlw   (String3_l1-String2_l1)/2
	retlw   DSC_STR
	retlw   'K'
	retlw   0x00
	retlw   'B'
	retlw   0x00
	retlw   'DX'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'N'
	retlw   0x00
	retlw   'C'
	retlw   0x00
	retlw   'O'
	retlw   0x00
	retlw   'D'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'R'
	retlw   0x00
String3_l1
	retlw   (String4_l1-String3_l1)/2
	retlw   DSC_STR
	retlw   'V'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw   '.'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw   '0'
	retlw   0x00
	retlw	'F'
	retlw	0x00
	retlw	'S'
	retlw	0x00
String4_l1
	retlw   (String5_l1-String4_l1)/2
	retlw   DSC_STR
	retlw   'C'
	retlw   0x00
	retlw   'f'
	retlw   0x00
	retlw	'g'
	retlw   0x00
	retlw	'1'
	retlw   0x00
String5_l1
	retlw   (String6_l1-String5_l1)/2
	retlw   DSC_STR
	retlw   'E'
	retlw   0x00
	retlw   'P'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw   'I'
	retlw   0x00
	retlw   'n'
	retlw   0x00
String6_l1

String1_l2			; Language 2, Chinese. Strings can be totally different than english
	retlw   (String2_l2-String1_l2)/2	; Length of string
	retlw   DSC_STR		; Descriptor type 3
	retlw   'L'
	retlw   0x00
	retlw   'o'
	retlw   0x00
	retlw   'r'
	retlw   0x00
	retlw   'd'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'N'
	retlw   0x00
	retlw   'i'
	retlw   0x00
	retlw   'k'
	retlw   0x00
	retlw   'o'
	retlw   0x00
	retlw   'n'
	retlw   0x00
String2_l2
	retlw   (String3_l2-String2_l2)/2
	retlw   DSC_STR
	retlw   'K'
	retlw   0x00
	retlw   'B'
	retlw   0x00
	retlw   'D'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'N'
	retlw   0x00
	retlw   'C'
	retlw   0x00
	retlw   'O'
	retlw   0x00
	retlw   'D'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'R'
	retlw   0x00
String3_l2
	retlw   (String4_l2-String3_l2)/2
	retlw   DSC_STR
	retlw   'V'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw   '.'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw	'F'
	retlw	0x00
	retlw	'S'
	retlw	0x00
String4_l2
	retlw   (String5_l2-String4_l2)/2
	retlw   DSC_STR
	retlw   'C'
	retlw   0x00
	retlw   'f'
	retlw   0x00
	retlw   'g'
	retlw   0x00
	retlw   '1'
	retlw   0x00
String5_l2
	retlw   (String6_l2-String5_l2)/2
	retlw   DSC_STR
	retlw   'E'
	retlw   0x00
	retlw   'P'
	retlw   0x00
	retlw   '1'
	retlw   0x00
	retlw   'I'
	retlw   0x00
	retlw   'n'
	retlw   0x00
String6_l2

The mcu is a 18F2550.
When trying to compile i get alot of errors and i dont undestand why

**towlerg** · - 22nd July 2014, 16:17

This NOT PicBasic nor does it use a Pic but it does do what you want and since source is available, you should be able to extract the
descriptors - http://blog.flipwork.nl/?x=entry:entry081009-142605.

One common piece of advise when dealing with descriptors, is to take a working example and make incrementally changes, testing with
each iteration.

George

**ruijc** · - 22nd July 2014, 17:43

Hello George,

Thank you so much for your help

.

You are right when you say to get a working example and do some changes.
That is what i'm trying to get...a working example.

All the examples i get here do not compile and i dont know why.
The one i posted ( descriptor ) is from this forum and it was suposed to be working but it does not compile

If someone would explain me why this does not compile maybe i would be able to fix it and move to the next stage.

Regards
Rui

**AvionicsMaster1** · - 22nd July 2014, 19:07

Any chance you could post the errors? Some of the people around here can often narrow the issue when seeing those.

**ruijc** · - 22nd July 2014, 19:49

Greetings,

Thanks...you are right...

If i compile with the descriptors commented i get these:

Code:

	' Include	"DESCKB.ASM"	' Include the HID descriptors

Name: Errors1.jpg
Views: 19422
Size: 322.7 KB

If i add the descriptor include it will open the desckb.asm file and outline in red lines in it.

Regards
Rui

**ruijc** · - 22nd July 2014, 19:54

Also...

I'm using these 2 files + all of the files inside the USB18 folder from PBP.

Regards
Rui

**towlerg** · - 23rd July 2014, 02:01

As far as I know all the samples in ..\USB18 will compile (I just tried a couple to confirm). One thing that often goes wrong when I use PicBasic is that I forget to set the correct microcontroller.

You are right when you say to get a working example and do some changes.
That is what i'm trying to get...a working example.

The point is that you start with working descriptors.

George

**ruijc** · - 23rd July 2014, 13:55

Hi there,

One thing that often goes wrong when I use PicBasic is that I forget to set the correct microcontroller.

Not in this case...i have the correct microcontroller selected.

The point is that you start with working descriptors.

Exactly, like i said in my first post.
My problem with the PBP examples is that i'm having problems correlating them with the other examples posted all over the forum ( that dont compile here ) and therefore make the necessary changes to keyboard.

Too bad PBP does not have keyboard demos

**pedja089** · - 23rd July 2014, 15:56

There is example...
HID USB Keypad.zip

**pedja089** · - 23rd July 2014, 15:56

There is example...
Attachment 7401

**towlerg** · - 23rd July 2014, 17:08

Hi

Exactly, like i said in my first post.
My problem with the PBP examples is that i'm having problems correlating them with the other examples posted all over the forum ( that dont compile here ) and therefore make the necessary changes to keyboard.

Sorry, forgot that PicBasic didn't have a keyboard example.

Let's just hope that some kind soul has a working HID Keyboard descriptor.

This is a long shot but in the USB readme it says that the descriptors for the samples are derived from the original Microchip Solutions package. I've attached the keyboard and mouse descriptors from that package (you can download them yourself from Microchip's site). Using the PicBasic mouse descriptor you have compared to the Microchip version and hopefully understand how to convert the Microchip keyboard descriptor.

George

Keyboard_descriptors.txt Mouse_descriptors.txt

**towlerg** · - 23rd July 2014, 17:32

Please disregard my last post.

From forum search there appear to be several examples of working keyboard descriptors. For example http://www.picbasic.co.uk/forum/showthread.php?t=2872 post #2

**ruijc** · - 23rd July 2014, 18:45

Greetings guys,

@ towlerg,

From forum search there appear to be several examples of working keyboard descriptors. For example http://www.picbasic.co.uk/forum/showthread.php?t=2872 post #2

I did checked them...in fact, the descriptor i'm using is the one from the link you posted...but like i said...they dont compile

@pedja089,

Thanks alot for the files. I opened the main file and just tried to compile...no success

I get alot of errors when compiling....

Name: Errors_1.jpg
Views: 16707
Size: 286.2 KB

I'm very confused !!!
These should compile...why cant i compile ??

Regards
Rui

**pedja089** · - 23rd July 2014, 21:53

Add DT_INTS-18 files.
http://darreltaylor.com/DT_INTS-18/home.html
I downloaded that example few years ago from forum, and I'm sure that it worked with PBP2.50.

**ruijc** · - 23rd July 2014, 23:01

Hi pedja089,

you are right...it did compile fine

thanks...

However...it's not being recognized with windows XP

Damn...i have no luck with USB stuff !!!!
If i code the pbp demo it recognizes, this one does not...

**pedja089** · - 23rd July 2014, 23:07

You probably need to set fuses according to your board...
EDIT:
Copy fuses from demo to keyboard...

**ruijc** · - 23rd July 2014, 23:22

Did that

didnt worked

**ruijc** · - 26th July 2014, 21:09

Well,

after burning my eyes out until now trying to get this thing working i'm just about to give up !!!!

I made some small changes to my main code and tryed many descriptors and configurations.
All descriptors in this forum, or dont compile, or are not accepted by the PC, etc.

I was able to modify some so that they would compile and accept by the PC as keyboard but i got strange results...

With the same main code, some descriptors jam my PC keyboard inputs like one of the keys got stucked ( mostly control key or Alt Gr ). Disconnecting the circuit dos not solve...only a restart.
I also noticed that if i changed the value from "usage minimum" retlw 0x19/retlw 0xE0 to retlw 0x19/retlw 0x04 i stopped getting the key stucked simptom.
Weird is that most keyboard descriptor examples use E0 value

Anyway...

With the 04 value, when turning the circuit on i get a group of characters non stop "cdefh".
A second descriptor with also the 04 value sends out "CDEH37W*" non stop.

They both send characters even without any button being pressed...and with button pressed the output has the same characters.

Again, here are both main code and descriptor

Code:

'****************************************************************
'*  Name    : HID_USB_Keypad.BAS                                *
'*  Author  : Peter MacLeod                                     *
'*  Date    : 01/30/2011                                        *
'*  Version : 1.01                                              *
'*  Notes   :                                                   *
'****************************************************************

'@ CONFIG PLLDIV = 12		;1=4MHz, 2=8MHz, 3=12MHz, 4=16MHz, 5=20MHz, 6=24MHz, 10=40MHz, 12=48MHz
'@ CONFIG FOSC = ECIO_EC		;XT_XT, XTPLL_XT, HS, HSPLL_HS, ECIO_EC

@   __CONFIG   _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@   __CONFIG   _CONFIG1H, _FOSC_HSPLL_HS_1H
'@ __CONFIG    _CONFIG2H, _WDT_OFF_2H & _WDTPS_512_2H
'@ __CONFIG    _CONFIG3H, _PBADEN_OFF_3H & _MCLRE_OFF_3H 

'OSCTUNE.6 = 1		' Enable PLL for 18F87J50 family

DEFINE OSC 48

INCLUDE "KYPD_DESC.pbp"
'include "KBDDESC.pbp"
'include "DESCUSBProject.bas"
'include "KBDDESCMOJA.bas"
   
'DEFINE LOADER_USED 1
'DEFINE RESET_ORG        1100h
'DEFINE INTERRUPT_ORG    1108h
 
'ASM
'INT_LIST  macro		; IntSource,       Label,       Type,  ResetFlag?
'        INT_Handler   USB_INT,  _SERVICE_USB,       ASM,  yes
'        ;INT_Handler   RBC_INT,  _SERVICE_KYPD,      PBP,  yes
'    endm
'    INT_CREATE		; Creates the interrupt processor
'ENDASM

'-------------------------------------------------------------------------------
' System Settings
'-------------------------------------------------------------------------------
i						VAR BYTE
BufferOut				Var Byte[8] 

ADCON1 = 15				' Set all I/Os to Digital
INTCON2.7 = 1			' Disable PortB Pullups         
CMCON = 7				' Disable Comparators
'-------------------------------------------------------------------------------
' Keypad Settings
'-------------------------------------------------------------------------------
TRISB = %01111111       'Set PORTB as inputs for keypad

Keypad_Debounce			CON 60
KeyPress                   VAR BYTE
KeyPress_Old            VAR BYTE

Keypad_Prev             VAR PORTB.0
Keypad_Next             VAR PORTB.1
Keypad_Play             VAR PORTB.2
Keypad_Stop             VAR PORTB.3
Keypad_Eject            VAR PORTB.4

Keypad_Mute             VAR PORTB.5
Keypad_VolUp            VAR PORTB.6
led                             VAR PORTB.7

Keypress = 0
'KeyPress_Old = 0
'-------------------------------------------------------------------------------
'START USB AND INTERRUPTS
'-------------------------------------------------------------------------------
PAUSE 500              'TIME TO SETTLE
USBINIT                'INITIALIZE USB
USBSERVICE             'SERVICE USB
'UIE = $7F              'ENABLE USB INTERRUPTS
'UEIE = $9F             'ENABLE USB ERROR INTERRUPTS
'@ INT_ENABLE  USB_INT
;@ INT_ENABLE  RBC_INT
'-------------------------------------------------------------------------------

	BufferOut[0] = 0
	BufferOut[1] = 0
	BufferOut[2] = 0
        BufferOut[3] = 0
        BufferOut[4] = 0
	BufferOut[5] = 0
	BufferOut[6] = 0
        BufferOut[7] = 0
    
    low led
    pause 100
    high led
    pause 2500
    low led
    pause 100

'-------------------------------------------------------------------------------
' Main Subroutine
'-------------------------------------------------------------------------------
Main: 

if Keypad_Prev=1 then

	BufferOut[0] = 0
	BufferOut[1] = 0
	BufferOut[2] = $15
    BufferOut[3] = 0
    
else

	BufferOut[0] = 0
	BufferOut[1] = 0
	BufferOut[2] = 0
    BufferOut[3] = 0

endif

gosub SERVICE_USB
GOSUB DoUSBOut

GOTO Main  
'-------------------------------------------------------------------------------
' Transmit data on the USB bus
'-------------------------------------------------------------------------------
DoUSBOut:
    USBService                         
    USBOut 1, BufferOut, 8, DoUSBOut
    RETURN
'-------------------------------------------------------------------------------
SERVICE_USB:
    USBSERVICE
'@ INT_RETURN
return

Code:

'****************************************************************
'*  Name    : KYPD_DESC.BAS                                     *
'*  Author  : Peter MacLeod                                     *
'*  Date    : 25/07/2014                                        *
'*  Version : 1.01                                              *
'*  Notes   : USB HID CNC Keypad Descriptor                     *
'****************************************************************

'USBMEMORYADDRESS Con	$400	' USB RAM starts here (set in device header file)
USBMEMORYSIZE	Con	256	' USB RAM size in bytes
USBReservedMemory Var Byte[USBMEMORYSIZE] USBMEMORYADDRESS	' Reserve memory used by USB assembler code

    Goto	kypd_desc_end	' Skip over all of the USB assembler code
    Asm

#define USB_EP0_BUFF_SIZE	8	; 8, 16, 32, or 64
#define USB_MAX_NUM_INT		1
#define USB_MAX_EP_NUMBER	1
#define NUM_CONFIGURATIONS	1
#define NUM_INTERFACES		1

#define UCFG_VAL	USB_PULLUP_ENABLE|USB_INTERNAL_TRANSCEIVER|USB_FULL_SPEED|USB_PING_PONG__NO_PING_PONG

#define USB_POLLING
#define HID_INTF_ID		    0x00
#define HID_EP			    1
#define HID_INT_OUT_EP_SIZE	1
#define HID_INT_IN_EP_SIZE	1
#define HID_NUM_OF_DSC		1

    include	"usb_hid.asm"	; Include rest of USB files, starting with HID class code

DeviceDescriptor
	retlw	(EndDeviceDescriptor-DeviceDescriptor)/2     ; Length of this descriptor
	retlw	USB_DESCRIPTOR_DEVICE	           ; DEVICE descriptor type
	retlw	0x10	                           ; USB Spec Release Number (low)
	retlw	0x01		                       ; (high)
	retlw	0x00		                       ; Class Code
	retlw	0x00		                       ; Subclass code
	retlw	0x00		                       ; Protocol code
	retlw	USB_EP0_BUFF_SIZE                  ; Max packet size for EP0
	retlw	0x81		                       ; Vendor ID  (low byte)
	retlw	0x17		                       ;            (high byte)
	retlw	0xD1		                       ; Product ID (low byte)
	retlw	0x07		                       ;            (high byte)
	;retlw	0x6F		                       ; Product ID (low byte)
	;retlw	0x09		                       ;            (high byte)
	retlw	0x01		                       ; Device release number (low)
	retlw	0x00		                       ; (high)
	retlw	0x01		                       ; Manufacturer string index
	retlw	0x02		                       ; Product string index
	retlw	0x00		                       ; Device serial number string index
	retlw	NUM_CONFIGURATIONS                 ; Number of possible configurations
EndDeviceDescriptor

USB_CD_Ptr
Configs
	db	low Config1, high Config1
	db	upper Config1, 0

Config1
	retlw	(Interface1-Config1)/2               ; Size of this descriptor in bytes
	retlw	USB_DESCRIPTOR_CONFIGURATION         ; CONFIGURATION descriptor type
Config1Len
	retlw	low ((EndConfig1 - Config1)/2)       ; Length of this configuration (low)
	retlw	high ((EndConfig1 - Config1)/2)      ; (high)
	retlw	NUM_INTERFACES                       ; Number of interfaces in this cfg
	retlw	0x01                                 ; Index value of this configuration
	retlw	0x00                                 ; Configuration string index
	retlw	_DEFAULT|_SELF	                     ; Attributes - bus powered
	retlw	0x32                                 ; Max power consumption (2X mA)
Interface1
	retlw	(HIDDescriptor1-Interface1)/2        ; Size of this descriptor in bytes
	retlw	USB_DESCRIPTOR_INTERFACE             ; INTERFACE descriptor type
	retlw	0x00                                 ; Interface Number
	retlw	0x00                                 ; Alternate Setting Number
	retlw	0x01                                 ; Number of endpoints in this interface
	retlw	HID_INTF                             ; Class code
	retlw	BOOT_INTF_SUBCLASS                   ; Subclass code
	retlw	0x00                                 ; Protocol code
	retlw	0x00                                 ; Interface string index
HIDDescriptor1
	retlw	(Endpoint1In-HIDDescriptor1)/2       ; Size of this descriptor in bytes
	retlw	DSC_HID                              ; HID descriptor type
	retlw	0x11                                 ; HID Spec Release Number in BCD format - 1.11 (low byte)
	retlw	0x01                                 ; (high byte)
	retlw	0x00                                 ; Country Code (0x00 for Not supported)
	retlw	HID_NUM_OF_DSC                       ; Number of class descriptors
	retlw	DSC_RPT                              ; Report descriptor type (HID)
ReportDescriptor1Len
	retlw	low ((EndReportDescriptor1-ReportDescriptor1)/2)
	retlw	high ((EndReportDescriptor1-ReportDescriptor1)/2)
Endpoint1In
	retlw	(EndConfig1-Endpoint1In)/2           ; length of descriptor
	retlw	USB_DESCRIPTOR_ENDPOINT              ; ENDPOINT descriptor type
	retlw	HID_EP|_EP_IN                        ; EP1, In
	retlw	_INT		                         ; Interrupt
	retlw	low (HID_INT_IN_EP_SIZE)             ; This should be the size of the endpoint buffer
	retlw	high (HID_INT_IN_EP_SIZE)
	retlw	0x0A                                 ; polling interval (10ms)
EndConfig1


    ENDASM
    ASM


ReportDescriptor1

    retlw   0x05
	retlw   0x01    ; usage page (generic desktop)
	retlw   0x09
	retlw   0x06    ; usage (keyboard)
	retlw   0xA1
	retlw   0x01    ; collection (application)
	retlw   0x05
	retlw   0x07    ;   usage (Key codes)
	retlw   0x19
	retlw   0x04    ;   usage minimum (224)   e0   04
	retlw   0x29
	retlw   0xE7    ;   usage minimum (231)
	retlw   0x15
	retlw   0x00    ;     logical minimum (0)
	retlw   0x25
	retlw   0x01    ;     logical maximum (1)
	retlw   0x75
	retlw   0x01    ;     report size (1)
	retlw   0x95
	retlw   0x08    ;     report count (8)
	retlw   0x81
	retlw   0x02    ;     Input (data,variable,absolute)
	retlw   0x95
	retlw   0x01    ;     report count (1)     
	retlw   0x75
	retlw   0x08    ;     report size (8)
	retlw   0x81
	retlw   0x01    ;     Input (constant)
	retlw   0x95
	retlw   0x05    ;     report count (5)
	retlw   0x75
	retlw   0x01    ;     report size (1)
	retlw   0x05
	retlw   0x08    ;     usage page (page# for leds)
	retlw   0x19
	retlw   0x01    ;     Usage minimum (1)
	retlw   0x29
	retlw   0x05    ;     Usage maximum (5)
	retlw   0x91
	retlw   0x02    ;     output (data,variable,absolute)
	retlw   0x95
	retlw   0x01    ;     report count (1)
	retlw   0x75
	retlw   0x03    ;     report size (3)
	retlw   0x91
	retlw   0x01    ;     output (constant)
	retlw   0x95
	retlw   0x06    ;     report count (6)
	retlw   0x75
	retlw   0x08    ;     report size (8)
	retlw   0x15
	retlw   0x00    ;     logical minimum (0)
	retlw   0x25
	retlw   0x65    ;     logical maximum (101)
	retlw   0x05
	retlw   0x07    ;     usage page (keycodes)
	retlw   0x19
	retlw   0x00    ;     usage minimum (0)
	retlw   0x29
	retlw   0x65    ;     usage maximum (101)
	retlw   0x81
	retlw   0x00    ;     input (data, array)	
	retlw   0xC0    ;   end collection


EndReportDescriptor1

USB_SD_Ptr
Strings
	db	low String0, high String0
	db	upper String0, 0
	db	low String1, high String1
	db	upper String1, 0
	db	low String2, high String2
	db	upper String2, 0

String0
	retlw   (String1-String0)/2	       ; Size of this descriptor in bytes
	retlw   USB_DESCRIPTOR_STRING      ; STRING descriptor type
	retlw   0x09                       ; Language ID as defined by MS - 0x0409 (low byte)
	retlw   0x04                       ; (high byte)

String1
	retlw	(String2-String1)/2
	retlw   USB_DESCRIPTOR_STRING
	retlw   'R'
	retlw   0x00
	retlw   'J'
	retlw   0x00
	retlw   'C'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'L'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'C'
	retlw   0x00
	retlw   'T'
	retlw   0x00
	retlw   'R'
	retlw   0x00
	retlw   'O'
	retlw   0x00
	retlw   'N'
	retlw   0x00
	retlw   'I'
	retlw   0x00
	retlw   'C'
	retlw   0x00

String2
	retlw	(EndStringDescriptors-String2)/2
	retlw	USB_DESCRIPTOR_STRING
	retlw   'H'
	retlw   0x00
	retlw   'I'
	retlw   0x00
	retlw   'D'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'K'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'Y'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   'T'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'S'
	retlw   0x00
	retlw   'T'
	retlw   0x00
	retlw   'E'
	retlw   0x00
	retlw   'R'
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   ' '
	retlw   0x00
	retlw   '0'
	retlw   0x00
	retlw   '1'
	retlw   0x00
EndStringDescriptors

	Endasm

kypd_desc_end			' End of skipped over USB assembler code

Although these are original from Peter MacLeod, they have suffered many changes in an effort of getting things to start working.

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