From: Joey Oravec <joravec@drewtech.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Interrupts in at91rm9200 u-boot.
Date: Wed, 11 Jul 2007 13:21:36 -0400 [thread overview]
Message-ID: <f733jb$b0v$1@sea.gmane.org> (raw)
In-Reply-To: 406A31B117F2734987636D6CCC93EE3C01CAD749@ehost011-3.exch011.intermedia.net
"Leonid" <Leonid@a-k-a.net> wrote in message
news:406A31B117F2734987636D6CCC93EE3C01CAD749 at ehost011-3.exch011.intermedia.net...
> I'm trying to implement simple USB device in u-boot for at91rm9200 and
> as a first step I want to see that I can work with interrupts there. I
> added temporary device initialization code to usb_lowlevel_init():
I used the USB Device port as a console for my at91sam9261, acting as a
usbser.sys compatible usb-to-serial port. It was a lot easier to use a
polling interface because there was some Atmel sample code available.
During early startup, I add the usb driver with device_register(). Each
function polls the status register, which works out fine since uboot calls
tstc constantly to look for a new character or putc to display something.
Finally I added a check for the device sense (power) to skip the
initialization completely if we know it's not connected to anything.
-joey
next prev parent reply other threads:[~2007-07-11 17:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-11 8:20 [U-Boot-Users] [patch] u-boot patch for ez-x5 Mi-hyun.Yoo
2007-07-11 17:08 ` [U-Boot-Users] Interrupts in at91rm9200 u-boot Leonid
2007-07-11 17:21 ` Joey Oravec [this message]
2007-07-12 2:25 ` Leonid
2007-07-12 15:09 ` Frank Mandarino
2007-07-12 15:36 ` Joey Oravec
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