|
Pic can ONLY act as Slave and NOT as Master (Host)!
1st of all ,Happy New year!
Now to your question:
You have to know that pic can be used only as 'slave' controller and not as 'master' so i is NOT possible to access devices 'from' the pic like usb sticks etc.
USB is a "master-slave" bus with exactly one master and multiple slaves.
The slaves are called peripherals. The master is called a host. Only the
host can initiate USB transfers; the peripherals (PIC) always respond, never
initiate!
Last edited by bitmaniac; - 2nd January 2007 at 17:36.
|
USB story
Well, thank you for your reply , it's clear
when looking to this item
http://www.mecanique.co.uk/products/usb/easyhid.html
could you tell me if I'm right ?
PIC (same in this example) is connected to a PC through the USB interface
Do you think that I will be able to see a "TEXT FILE" in the PC hard disk
and get the datas with a USBread command (or something else)
If it is possible, I can prepare the TEXT file with a simple method
and feed my PIC (with OSD program imbedded) ?
thanks in advance
Francois F1CHF
|
Yup you could dump a .txt, .bin, .hex or else file from your PC to your PIC by building your own PC software.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
USB story
Oh year !
Sure I can do it that way, the complete story is that the PIC / OSD system is installed ALONE in a TVA repeater (Radio amateur television) and there is no
PC on the remote site ! that why the solution with the USB key directly
connected to the PIC will be superb, but if it is not possible
I will try with BIG I2C eprom ... I will built a USB/I2C key !
hi ...
Francois F1CHF
|
I don't know about availability in your location, but I have used the AMTEL AT45DB321C Dataflash very successfully. If you're looking for a large storage, PIC friendly solution, it works a treat.Originally Posted by F1CHF
Steve B
|
I knew it reminded me something....
i don't know how far those one could go...
http://www.saelig.com/miva/merchant....tegory_Code=FF
http://www.crownhill.co.uk/product.php?prod=1578
http://www.crownhill.co.uk/product.php?prod=1556
but seems to be interesting... worth to read it carefully...
Last edited by mister_e; - 11th January 2007 at 18:10.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
I got it ...
My god, i have too much item now ..
I have to understand first
and to order after !
Thanks for your usefull help.
Francois
Members who have read this thread : 0You do not have permission to view the list of names.
Posting Permissions
Bookmarks