Mouse example is not working in Pic18F2450
Hello all,
I am new to USB.
I have been trying for more than a week to get the mouse example working in Pic18F2450 but it either doesn't get recognized by PC or it says unknown usb device.
I am using PicBasic Pro 2.60 and Pic uses external 24Mhz crystal in low speed usb.
Here is the code:
Code:
Include "hid_desc.bas" ' Include the HID descriptors
Define OSC 24
buffer Var Byte[3]
loopcnt Var Byte
state Var Byte
Pause 10
USBInit ' Get USB going
buffer[0] = 0
buffer[1] = 0
buffer[2] = 0
movecursor:
For state = 0 To 3 ' Move through each state
For loopcnt = 1 To 16 ' 16 steps in each direction
Branch state, [up, right, down, left]
up:
buffer[1] = 0
buffer[2] = -2
Goto endgame
down:
buffer[1] = 0
buffer[2] = 2
Goto endgame
left:
buffer[1] = -2
buffer[2] = 0
Goto endgame
right:
buffer[1] = 2
buffer[2] = 0
endgame:
USBService ' Must service USB regularly
USBOut 1, buffer, 3, endgame ' Send buffer to endpoint 1
Next loopcnt
Next state
Goto movecursor ' Do it forever
Descriptor code:
Code:
' hid_desc.bas
'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 hid_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 UCFG_VAL USB_PULLUP_ENABLE|USB_INTERNAL_TRANSCEIVER|USB_LOW_SPEED|USB_PING_PONG__NO_PING_PONG
;#define USE_SELF_POWER_SENSE_IO
;#define USE_USB_BUS_SENSE_IO
#define USB_POLLING
; HID
; Endpoints Allocation
#define HID_INTF_ID 0x00
#define HID_EP 1
#define HID_INT_OUT_EP_SIZE 3
#define HID_INT_IN_EP_SIZE 3
#define HID_NUM_OF_DSC 1
include "usb_hid.asm" ; Include rest of USB files, starting with HID class code
; ******************************************************************
; 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 ; Size of this descriptor in bytes
retlw USB_DESCRIPTOR_DEVICE ; DEVICE descriptor type
retlw 0x10 ; USB Spec Release Number in BCD format - 1.10 (low byte)
retlw 0x01 ; (high byte)
retlw 0x00 ; Class Code
retlw 0x00 ; Subclass code
retlw 0x00 ; Protocol code
retlw USB_EP0_BUFF_SIZE ; Max packet size for EP0
retlw 0xD8 ; Vendor ID - 0x04D8 is Microchip Vendor ID (low byte)
retlw 0x04 ; (high byte)
retlw 0x00 ; Product ID: Mouse in a circle fw demo (low byte)
retlw 0x00 ; (high byte)
retlw 0x03 ; Device release number in BCD format (low byte)
retlw 0x00 ; (high byte)
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
; ******************************************************************
; 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 upper Config1, 0
; Configuration Descriptor
Config1
retlw (Interface1-Config1)/2 ; Size of this descriptor in bytes
retlw USB_DESCRIPTOR_CONFIGURATION ; CONFIGURATION descriptor type
Config1Len
retlw low ((EndConfig1-Config1)/2) ; Total length of data for this cfg
retlw high ((EndConfig1-Config1)/2)
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
retlw 50 ; 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 intf
retlw HID_INTF ; Class code
retlw BOOT_INTF_SUBCLASS ; Subclass code
retlw HID_PROTOCOL_MOUSE ; Protocol code
retlw 0x00 ; Interface string index
HIDDescriptor1
retlw (Endpoint1-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)
Endpoint1
retlw (EndConfig1-Endpoint1)/2 ; Size of this descriptor in bytes
retlw USB_DESCRIPTOR_ENDPOINT ; ENDPOINT descriptor type
retlw HID_EP|_EP_IN ; Endpoint Address
retlw _INT ; Attributes
retlw low (HID_INT_IN_EP_SIZE) ; Size of the endpoint buffer in bytes (low byte)
retlw high (HID_INT_IN_EP_SIZE) ; (high byte)
retlw 0x0A ; Polling interval (10ms)
EndConfig1
ReportDescriptor1
retlw 0x05
retlw 0x01 ; usage page (generic desktop)
retlw 0x09
retlw 0x02 ; usage (mouse)
retlw 0xA1
retlw 0x01 ; collection (application)
retlw 0x09
retlw 0x01 ; usage (pointer)
retlw 0xA1
retlw 0x00 ; collection (linked)
retlw 0x05
retlw 0x09 ; usage page (buttons)
retlw 0x19
retlw 0x01 ; usage minimum (1)
retlw 0x29
retlw 0x03 ; usage maximum (3)
retlw 0x15
retlw 0x00 ; logical minimum (0)
retlw 0x25
retlw 0x01 ; logical maximum (1)
retlw 0x95
retlw 0x03 ; report count (3)
retlw 0x75
retlw 0x01 ; report size (1)
retlw 0x81
retlw 0x02 ; input (3 button bits)
retlw 0x95
retlw 0x01 ; report count (1)
retlw 0x75
retlw 0x05 ; report size (5)
retlw 0x81
retlw 0x01 ; input (constant 5 bit padding)
retlw 0x05
retlw 0x01 ; usage page (generic desktop)
retlw 0x09
retlw 0x30 ; usage (X)
retlw 0x09
retlw 0x31 ; usage (Y)
retlw 0x15
retlw 0x81 ; logical minimum (-127)
retlw 0x25
retlw 0x7F ; logical maximum (127)
retlw 0x75
retlw 0x08 ; report size (8)
retlw 0x95
retlw 0x02 ; report count (2)
retlw 0x81
retlw 0x06 ; input (2 position bytes X & Y)
retlw 0xC0 ; end collection
retlw 0xC0 ; end collection
EndReportDescriptor1
; String pointer table
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
; Language code string descriptor
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)
; Manufacturer string descriptor
String1
retlw (String2-String1)/2 ; Size of this descriptor in bytes
retlw USB_DESCRIPTOR_STRING ; STRING descriptor type
retlw 'M'
retlw 0x00
retlw 'i'
retlw 0x00
retlw 'c'
retlw 0x00
retlw 'r'
retlw 0x00
retlw 'o'
retlw 0x00
retlw 'c'
retlw 0x00
retlw 'h'
retlw 0x00
retlw 'i'
retlw 0x00
retlw 'p'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'T'
retlw 0x00
retlw 'e'
retlw 0x00
retlw 'c'
retlw 0x00
retlw 'h'
retlw 0x00
retlw 'n'
retlw 0x00
retlw 'o'
retlw 0x00
retlw 'l'
retlw 0x00
retlw 'o'
retlw 0x00
retlw 'g'
retlw 0x00
retlw 'y'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'I'
retlw 0x00
retlw 'n'
retlw 0x00
retlw 'c'
retlw 0x00
retlw '.'
retlw 0x00
; Product string descriptor
String2
retlw (EndStringDescriptors-String2)/2 ; Size of this descriptor in bytes
retlw USB_DESCRIPTOR_STRING ; STRING descriptor type
retlw 'M'
retlw 0x00
retlw 'o'
retlw 0x00
retlw 'u'
retlw 0x00
retlw 's'
retlw 0x00
retlw 'e'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'I'
retlw 0x00
retlw 'n'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'a'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'C'
retlw 0x00
retlw 'i'
retlw 0x00
retlw 'r'
retlw 0x00
retlw 'c'
retlw 0x00
retlw 'l'
retlw 0x00
retlw 'e'
retlw 0x00
retlw ' '
retlw 0x00
retlw 'D'
retlw 0x00
retlw 'e'
retlw 0x00
retlw 'm'
retlw 0x00
retlw 'o'
retlw 0x00
EndStringDescriptors
Endasm
hid_desc_end ' End of skipped over USB assembler code
Any idea?
Re: Mouse example is not working in Pic18F2450
Did you set fuse PLLDIV = 6?
PLL expect 4MHz input clock. So you must set correct divider for your crystal oscillator.
Re: Mouse example is not working in Pic18F2450
It is no trival task to set the clock fuses correctly on an unfamiliar PIC. I suggest that you set your fuses for the required rate, then write a program that flashes a LED at a known rate (eg 1 per sec), then ensure that reality agrees by manuallly timing by conting flashes.
Your enquiry re. low speed piqued my interest. Having never used low speed I did a little googling and came up with some contradictory "answers". See http://www.compuphase.com/electronics/usb_lowspeed.htm and http://www.rosseeld.be/DRO/PIC/18F24..._Usb_Clock.htm
