USB to USB flash Drive File Copier

[mackrackit]

Can you post the code?

When you setup the firm ware for the VDIP, what baud rate did you give it?

You were able to communicate with the VDIP using a terminal, correct?
What baud rate did you use then?

[newbie]

The code i used was same as the code that i posted above...

I used the default baud rate which is i think 9600...do you think i should change it to 2400?

I also found out that it can be risky for flash drives.. it broke my disk just now..

[mackrackit]

The baud rate in your code is not for 9600. The baud you are using is from my code.
You need 84, I think...

What do you mean broke? What happened?

[newbie]

I tried changing the baud rate of the vdip to 2400 using its SBD command but it does not work...the vdip only works properly when the computer terminal's baud rate is 9600. you used the 2400 baud rate in your program right? how about your vdip? what was its baud rate?

[newbie]

about my flash drive after using it for testing it suddenly could not be read by the computer. It can be detected normally and even assigns to a proper letter but when i open it, the computer prompts "please insert a disk in drive F " or something like that...

anyways moving on...
Ive read that 4Mhz oscillators are pretty much unreliable with 9600 baud rate so i might have to change it.. the problem is I cant get any program running in my pic when i change its clock to 20Mhz..is there any other component that needs to be changed?

[mackrackit]

When you set up the VDIP's firmware there is a place to set the baud rate and hand shaking. If I remember correctly this is on the first tab of the firmware set up program.

I had mine set for 4800 7E1.

The OSC needs to match the DEFINE in your code.

[newbie]

Ive changed the baud rate of the pic in the program to 84 and when nothing changed, i tried 8276. I based the baud rate codes from the table in this page:
http://melabs.com/resources/ser2modes.htm
..but still the program hangs up when it encounter a serin2 command. still the flowin is low so no infinite loop is happening.

any other suggestions?

[mackrackit]

Re-read this.
http://www.picbasic.co.uk/forum/showthread.php?t=7700

Post your current code and a schematic.

[newbie]

INCLUDE "modedefs.bas"

DEFINE LCD_DREG     PORTB
DEFINE LCD_DBIT     0
DEFINE LCD_RSREG    PORTD
DEFINE LCD_RSBIT    1
DEFINE LCD_EREG     PORTD
DEFINE LCD_EBIT     3
DEFINE LCD_RWREG    PORTD
DEFINE LCD_RWBIT    2
DEFINE LCD_BITS     8
DEFINE LCD_LINES    4
Define LCD_CHARS    20
DEFINE LCD_COMMANDUS    2000
DEFINE LCD_DATAUS   50

VinTXD VAR PORTC.7 'AD0
VinRXD VAR PORTC.6 'AD1
FlowIn VAR PORTC.5 'AD2

        Pause 500       ' Wait for LCD to startup

mainloop:	
		Lcdout $fe, 1,  "********************"
        Lcdout $fe,$C0, "   PORTABLE FILE    " 
		Lcdout $fe,$94, "  TRANSFER DEVICE   "  
		Lcdout $fe,$d4,	"********************"
        Pause 3000       ' Wait 2 secondS
		


NUMS	VAR	BYTE[16]

X1	VAR	BYTE
X2	VAR	BYTE
X3	VAR	BYTE
X4	VAR	BYTE
X5	VAR	BYTE
X6	VAR	BYTE
X7	VAR	BYTE
X8	VAR	BYTE
X9	VAR	BYTE
X10	VAR	BYTE
X11	VAR	BYTE
X12	VAR	BYTE

StartDisk:


HIGH VinRXD
PAUSEUS 1000
SEROUT2 VinRXD,8588,["ECS",13]
LCDOUT $FE,1, "1"
HIGH VinRXD
PAUSEUS 1000
SEROUT2 VinRXD,8588,["IPA",13]
LCDOUT $FE,1, "2"
HIGH VinRXD
PAUSEUS 1000
SEROUT2 VinRXD,8588,["A:",13]
LCDOUT $FE,1, "3"
HIGH VinRXD
PAUSEUS 100
SEROUT2 VinRXD,8588,["DIR",13]
LCDOUT $FE,1, "4"
PAUSEUS 1000
WAIT1
IF FLOWIN = 1 THEN WAIT1
SERIN2 VinTXD,8588,[STR NUMS\12]
LCDOUT $FE,1, "5"

X1 = NUMS[0]
X2 = NUMS[1]
X3 = NUMS[2]
X4 = NUMS[3]
X5 = NUMS[4]
X6 = NUMS[5]
X7 = NUMS[6]
X8 = NUMS[7]
X9 = NUMS[8]
X10	= NUMS[9]
X11	= NUMS[10]
X12	= NUMS[11]

PAUSE 100
LCDOUT $FE,1,X1,X2,X3,X4,X5,X6,X7,X8,x9,x10,x11,x12
PAUSE 2000
goto StartDisk

here is my code. its almost the same as the one that i posted earlier..

i changed the baud rate back to 8588 in the program and tried to change the vdip's baud rate to 4800 in the comport monitor using the SBD $710200 (change baud rate to 4800) command but the monitor just printed weird characters and then the comport monitor stopped responding. When i restarted the connection, the vdip was still working properly in 9600 baud rate and not in 4800.

i also tried to change the baud rate of the vdip using a newly modified firmware with 4800 set as its baud rate. I saved it in a flash drive and inserted it to the vdip but when I entered the command FWU ftrfb.ftd (firmware upgrade ftrfb.ftd), the monitor printed "No Upgrade". obviously that was a failure.

I haven't made a circuit diagram yet since im still testing with breadboards. I do have a working PIC development board where i interfaced the lcd and the vdip..here are the pin connections.

LCD DATA LINES - PORTB
LCD RS BIT - PORTD.1
LCD RW BIT - PORTD.2
LCD E BIT - PORTD.3

VinTXD(AD0) - PORTC.7
VinRXD(AD1) - PORTC.6
RTS(AD2) - PORTC.5
CTS(AD3) - GND

OSC 4MHZ

[newbie]

line feed is 10 right? if i would have the line feed to an IF statement, how would i get the compiler to understand that I am pertaining to 10 as the line feed and not the number itself? would i need to put a preceding sign like # or $ or should i just put 10 without the "" marks?

Just have the string terminate when EOF is returned.

are you talking about the array of bytes as the string in here? or is there a way to save the group of characters into one string constant?

[newbie]

hi! here's what has happening to my project so far... ive been interfacing a vdip2, a pic16f877a and a 4x20LCD. i can already print the responses of the vdip to the LCD..but my problem is that some characters appear in between the file names which do not appear when the vdip is connect to the pc. ive searched the ascii tables http://www.ascii-code.com/ to see if these characters have an equivalent hex code so that i can use it for the wait() command in picbasic pro..but i did not find the characters in the table. i first thought that it was a line feed but when i used the code $0A(line feed) for the serial wait() command, it did not work... do you have any idea on these characters are? ive attached some images, you might want to take a look on what these characters look like...

[mackrackit]

Looks like you about have it!!! Good job!!!

Look at the data sheet for the display and there should be a "Character Font Table". Those characters show up there.

Why the commands are being sent to your display and how to fix it I do not know...
Thinking....

[newbie]

i have a data sheet of the display...some of the characters of the are found in there but some aren't. these reason i have my eyes set on these weird character is because i think they would be the key to sorting the file names since the appear in between them.basing on the pictures above, do you have any idea on how i can sort the file names so that i can print only one file name per line? ive been trying joe's suggestion but so far i have no success.

[Archangel]

i have a data sheet of the display...some of the characters of the are found in there but some aren't. these reason i have my eyes set on these weird character is because i think they would be the key to sorting the file names since the appear in between them.basing on the pictures above, do you have any idea on how i can sort the file names so that i can print only one file name per line? ive been trying joe's suggestion but so far i have no success.

Hi Newbie,
Sometimes weird characters are due to the clock or baud being off. They can occur if the LCD's power is not bypassed adequately with a capacitor. What I do to check things like this is to make a counter loop which outputs a count from 0 to xxx and also outputs a space after and also outputs the counter variables actual count, and I watch for the character to appear and see what number makes it so.