USB to USB flash Drive File Copier

[fokus_1116]

thx for your help..

pic18f4550pin VDIP2pin RS232 pin

RC.7 RX AD0 TXD PIN11
RC.6 TX AD1 RXD
RC.0 I/O AD2 RTS
AD3 CONNECT TO GND


GOT ANY IDEA WHERE GOES WRONG?

[mackrackit]

Another thing I forgot to ask that could be a concern.

What are you using for an OSC at the PIC and how are the configuation bits set?
Can you connect the PIC directly to Hyper-Terminal and receive text correctly ? If so then you know the PIC is running at the expected speed.

Try inverted mode with out a 232 chip and then try true mode with a 232 chip.
Doing these test should help find the problem.

[fokus_1116]

i am using 20Mhz
and may i know how to set the config bit for picbasic pro because
'__config _XT_OSC & _WDT_OFF & _PWRTE _ON & _CP_OFF'
content error when build it.

how i try connect the tx pin of the pic to hyper terminal
thank for your suggest..

[fokus_1116]

is that just connect the TX pin of the pic to the max232 pin11 ? because i cant get the output from hyperterminal..

[fokus_1116]

my configuration bits is set as the picture.. but still cant make the pic it display thing on the hyperterminal...still got any suggestion?

[mackrackit]

The first thing we need to do is make sure the PIC is running at the speed you think it is, or know what speed it is running at.

These USB chips can be confusing ( for me anyways ) when it comes to setting the PLL and all. Bruce has a good explanation here that I refer to.
http://www.picbasic.co.uk/forum/show...85&postcount=4
So if you set the configs as he has them the PIC should be running at 48MHz.
DEFINE OSC 48

To check the speed write a code that will blink an LED at one second on and one second off.

Then refer to the PBP manual under SEROUT2. There it shows how to connect the chip to a PC. Send some text to a terminal.

When this is all working we can "talk" to the VDIP.

[fokus_1116]

for me also confuse for that part...so i change the pic 18f4550 to pic16f873A..this will more easy (i think)...now i try make it working on hyperterminal ....