USBDemo, something to learn USB a little bit

[mister_e]

interesting. So i can't confirm if it's a MPASM problem (5.06 now) or a PBP V2.46 problem.

I know they fixed the config fuse problem in 2.47, but can't say if they have only edit the .INC file (LIST line) or they also change something else.

Anyways, if it's working

[Squibcakes]

Mr_E
Yeah ok well thanks for your input anyway - always welcome I'm happy to edit the the .inc file and leave it at that.

Great news! I finally got the CDC virtual comport working!!!!!!

Now I can send data via USB (virtual comport) and out of the Pic 18F4550 USART! and vice versa!

I'm stoked that this actually works!

Squib

[xxdymhbh]

Thanks for your sharing!

[Noise.be]

Thanx for share

I have a problem when I program the PIC with the version of the zip and that I makes all the connection necessary,
I connect it on the USB and Windows says to me every 3 minutes Unrecognized device

20MHz
10nF on pin 18
resistor 1k5 on pin 23 ?

what did I wrong?

[mister_e]

This example use a 4MHz crystal (as stated in the code and in post #1), and i suggest something higher than 220nF and you don't need the 1.5K resistor as i set the internal one.

Now if you want to stick with the 20MHZ crystal, you'll need to modify the first __CONFIG line to

    __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L

all should be fine after that.

[Darrel Taylor]

For 20mhz, you also need ...

    __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H & _FCMEM_OFF_1H & _IESO_OFF_1H

[mister_e]

<table><tr><td></td><td>Newbie mistake from me... At least heaven's voice saved the day </td></tr></table>

[SterlingY]

This message will now be rendered useless. I wanted to delete it, but since I can't, I've put this stupid line here.

[Josuetas]

Hi, This really is a nice post, I am going to work with it, i will have to use 18f2550 since it is the available part around here.

1. Any problem with it being the 2550? someone said "Thank god you didn´t choose the 2550" before.

2. I guess i`ve read the answer to this but...: Usb Communications require somehow a "master"(host) and a "slave"? if this is so, i would never be able to communicate two pics through USB would I?, where i am going is that i intend to control USB devices but this could never be done if this is true, has anyone figured something without buyign those ugly USB HOST controllers? they really are a pain in the a.. you can´t find them at all(not here).

I have a uC develpment to control by serial (rS232) port some GSM phones, but the newer models dont support serial but USB, what should be done to transfer data between a uc and them?

It seems to me like an step backwards the fact that usb had lost the simplicity of RS232 communications in this matter.

thanks for the hobby time again

[precision]

Can i use this demo with DasyLab Or Labview ? I using both software from long time for DAQ.
Thanks

.

[bj49]

Thanks to Mister_E's USB demo and DT's ints18 and this forum I have my USB board PICF4550@ 48 Mhz running a single DS1820 displaying on VB6 and it took less than 1/2 a day and its stable and fast!

This is my first post and I would like to congratulate this forum for the information that is available and the generosity of people like mister_e and darren taylor and others for sharing their experience;it is invaluable for me
This demo should be pinned!

[Demon]

I'm able to use Steve's demo along with Darrel's include, but it only works when the MeLabs U2 USB programmer is connected. If I unplug the programmer, the 18F4550 is no longer recognized:

'***************************************************************************
'*  Name    : USBLabX1_RH.pbp                                              *
'*  Author  : Steve Monfette/Darrel Taylor/Demon                    *
'*  Date    : Jan 11 2012                                                  *
'*  Version : 3.0                                                          *
'*  Notes   : This is a re-creation of mister-e's USBdemo for DT_HID       *
'*          : Meant to work with mister-e's GUI                            *
'*          : Modified for Lab X1                                          *
'*  Hardware : PIC 18F4550, 20mhz crystal                                  *
'*           : Lab X1 Experimental Board, 9.5V wall adapter                *
'*           : MeLabs U2 Programmer v4.32                                  *
'*  Software : PIC Basic Pro v2.60C                                        *
'*           : MicroCode Studio Plus v2.2.1.1                              *
'*           : MPASM WIN Assembler v4.02 (mplab tools/MPASM Suite)         *
'*  PIC mods : plastic USB connector hot-glued onto top of PIC             *
'*           : D- wired to C4 (pin 23) directly to top of pins             *
'*           : D+ wired to C5 (pin 24) directly to top of pins             *
'*           : two 0.1uF ceramic caps in parallel across VUSB and VSS      *
'***************************************************************************
'--- if you use these, you must comment the ones in the .inc file ---
@   __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@   __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
@   __CONFIG    _CONFIG2L, _PWRT_OFF_2L & _BOR_ON_2L & _BORV_46_2L & _VREGEN_ON_2L
@   __CONFIG    _CONFIG2H, _WDT_OFF_2H
@   __CONFIG    _CONFIG3H, _CCP2MX_ON_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
@   __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L

DEFINE OSC 48

DEFINE  LCD_DREG      PORTD         ' Set LCD data port
DEFINE  LCD_DBIT      4             ' Set starting data bit
DEFINE  LCD_RSREG     PORTE         ' Set LCD register select port
DEFINE  LCD_RSBIT     0             ' Set LCD register select bit
DEFINE  LCD_EREG      PORTE         ' Set LCD enable port
DEFINE  LCD_EBIT      1             ' Set LCD enable bit
DEFINE  LCD_BITS      4             ' Set LCD bus size
DEFINE  LCD_LINES     2             ' Set number of lines on LCD
DEFINE  LCD_COMMANDUS 2000          ' Set command delay time in microseconds
DEFINE  LCD_DATAUS    50            ' Set data delay time in microseconds

;--- Setup Interrupts ------------------------------------------------------
INCLUDE "DT_INTS-18.bas"        ; Base Interrupt System
INCLUDE "ReEnterPBP-18.bas"     ; PBP Re-entry for external interrupt

ASM
INT_LIST  macro    ; IntSource,     Label,   Type, ResetFlag?
        INT_Handler   USB_Handler
        INT_Handler   INT_INT,   _ToggleLED1, PBP,    yes
    endm
    INT_CREATE               ; Creates the interrupt processor
endasm

@   INT_ENABLE   INT_INT        ; enable external (INT) interrupts

;--- Setup USB -------------------------------------------------------------
INCLUDE "DT_HID260.pbp"

DEFINE USB_VENDORID    6017
DEFINE USB_PRODUCTID   2000
DEFINE USB_VERSION     1
DEFINE USB_VENDORNAME  "Mr E/DT/RH"
DEFINE USB_PRODUCTNAME "USBLabX1"
DEFINE USB_SERIAL      "001"
DEFINE USB_INSIZE      8    ;  IN report is PIC to PC (8,16,32,64)
DEFINE USB_OUTSIZE     8    ; OUT report is PC to PIC
DEFINE USB_POLLIN      10   ; Polling times in mS, MIN=1 MAX=10
DEFINE USB_POLLOUT     10

; --- Each USB status LED is optional, comment them if not used ------------
; --- They can be assigned to any pin, and no further action is required --- 
DEFINE USB_LEDPOLARITY 1       ; LED ON State [0 or 1]  (default = 1)
DEFINE USB_PLUGGEDLED  PORTD,0 ; LED indicates if USB is connected
DEFINE USB_TXLED       PORTD,1 ;  "      "     data being sent to PC
DEFINE USB_RXLED       PORTD,2 ;  "      "     data being received from PC

;--- Setup ADC -------------------------------------------------------------
DEFINE ADC_BITS 8  ; Number of bits in ADCIN result

    TRISA = %00000011               ' Set port A pins to 6 output, 2 input
    TRISB = %00001111               ' Set port B pins to 4 output, 4 input
                                    ' B0 = External Interrupt
    TRISC = %00000000               ' Set all port C pins to output
    TRISD = %00000000               ' Set all port D pins to output
    TRISE = %00000000               ' Set all port E pins to output

;--- Variables -------------------------------------------------------------
Value0      VAR  WORD : Value0 = 0
Value1      VAR  WORD : Value1 = 0
DUTY1       VAR  WORD
DUTY2       VAR  WORD
LED1        VAR PORTD.3
WS_CHAR     VAR BYTE
WS_BYTE     VAR BYTE
WS_LOOPW    VAR WORD
;--- Initialize ------------------------------------------------------------
    ADCON2.7 = 0       ; left justify    (Change this if ADFM in diff register)
    ADCON1 = %00001101     ; AN0 & AN1 analog
    INTCON2 = %00000000    ; Pull-up resistors, falling edge

    PORTB = %00000000      ; Set output on keypad to prevent floating pins


    PAUSE   2000                     ' Wait for USB to initalize
    LCDOUT  $FE,1,"LabX1 18F4550 USB"
    PORTD = 0                       ' Clear LEDs from LCD operations
    ARRAYWRITE USBTXBuffer, ["Lab X1  "]
    IF Plugged THEN GOSUB DoUSBOut     ; only send when USB is connected
    
;--- The Main Loop ---------------------------------------------------------
Main:
    FOR WS_LOOPW = 0 to 1000           ; Check for incomming USB data while waiting
@       ON_USBRX_GOSUB  _HandleRX
        PAUSE 1
    NEXT WS_LOOPW
    
    ADCIN 0, Value0            ; Send A/D about once/sec
    ADCIN 1, Value1
    ARRAYWRITE USBTXBuffer, [Value0, Value1, PORTD.3, 0, 0, 0, 0, 0]
    IF Plugged THEN GOSUB DoUSBOut     ; only send when USB is connected

    GOTO Main
end

;---- Receive incoming data PORTB LEDS and CCP PWM dutycycle ---------------
HandleRX:
    ARRAYREAD  USBRXBuffer,[WS_BYTE, DUTY1.LowByte, DUTY1.HighByte, _
                                    DUTY2.LowByte, DUTY2.HighByte]
    LCDOUT  $FE,$C0,BIN WS_BYTE
    PORTD = 0                       ' Clear LEDs from LCD operations
return

'---[INT - interrupt handler]---------------------------------------------------
ToggleLED1:
    TOGGLE LED1
    ARRAYWRITE USBTXBuffer, ["Button  "]
    IF Plugged THEN GOSUB DoUSBOut     ; only send when USB is connected
    PORTB = 0               ' Set output on keypad to prevent floating pins
@ INT_RETURN

On the Lab X1:
- PWM logic is not active.
- buttons 1, 2, 3 and 4 on the keypad activate Port A2 LED.
- AN 0 and 1 work as expected.

On the PC:
- Port B is displayed on the LCD.

Any idea why Windows XP Home would need the USB programmer connected in order to recognize the PIC?

Everything works fine if I reconnect the programmer.

Robert

[hyilmaz]

DataToSend's array size is 8. i want to make it 16. i mean i want to send 16 variable at the same time. not 8. can anybody help me?