Comments on: Kernel driver for the PIC18F4550 microcontroller http://hackaday.com/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/ Fresh hacks every day Tue, 24 Nov 2009 01:39:11 +0000 http://wordpress.com/ hourly 1 By: leblanc meneses http://hackaday.com/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/comment-page-1/#comment-35099 leblanc meneses Mon, 12 May 2008 20:03:46 +0000 http://hackaday.iheartcashews.com:8181/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/#comment-35099 alternatives:<br><br>linux driver:<br><a href="http://osrfx2.sourceforge.net/" rel="nofollow">http://osrfx2.sourceforge.net/</a><br><br>windows driver:<br><a href="http://www.codeproject.com/KB/system/kmdf_osr_usb_fx2.aspx" rel="nofollow">http://www.codeproject.com/KB/system/kmdf_osr_usb_fx2.aspx</a><br><br>uses: Cypress Semiconductor USB FX2 chipset alternatives:

linux driver:
http://osrfx2.sourceforge.net/

windows driver:
http://www.codeproject.com/KB/system/kmdf_osr_usb_fx2.aspx

uses: Cypress Semiconductor USB FX2 chipset

]]> By: PsiZ http://hackaday.com/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/comment-page-1/#comment-35098 PsiZ Sun, 11 May 2008 13:57:07 +0000 http://hackaday.iheartcashews.com:8181/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/#comment-35098 I forgot to mention another "real" reason actually, if you don't use a special /dev interface but want to replace it by a ttyS or parport emulation for example, its much more difficult, if it is even possible, to do that without being in kernel space I forgot to mention another “real” reason actually, if you don’t use a special /dev interface but want to replace it by a ttyS or parport emulation for example, its much more difficult, if it is even possible, to do that without being in kernel space

]]> By: PsiZ http://hackaday.com/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/comment-page-1/#comment-35097 PsiZ Sun, 11 May 2008 03:42:34 +0000 http://hackaday.iheartcashews.com:8181/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/#comment-35097 Actually when I did that module, I had thought about using isochronous instead of bulk at some point, but the main reason is simply because that was a way to learn very basic kernel programming for me (you have to start somewhere :) ).<br><br>Also I find it cleaner to have a working kernel-space backend then do the less-low-level stuff that doesn't know anything about the hardware protocol in user space.<br><br>And BTW, the bootloader uploader in the original package already uses the libusb, so that would not have been as fun as trying to write a small kernel driver :) Actually when I did that module, I had thought about using isochronous instead of bulk at some point, but the main reason is simply because that was a way to learn very basic kernel programming for me (you have to start somewhere :) ).

Also I find it cleaner to have a working kernel-space backend then do the less-low-level stuff that doesn’t know anything about the hardware protocol in user space.

And BTW, the bootloader uploader in the original package already uses the libusb, so that would not have been as fun as trying to write a small kernel driver :)

]]> By: bertrik http://hackaday.com/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/comment-page-1/#comment-35096 bertrik Sun, 11 May 2008 01:49:04 +0000 http://hackaday.iheartcashews.com:8181/2008/05/10/kernel-driver-for-the-pic18f4550-microcontroller/#comment-35096 Why not use libusb instead of a kernel driver? AFAIK libusb supports any USB transfer mode except isochronous. It's much safer to do this kind of thing in user-space. Why not use libusb instead of a kernel driver? AFAIK libusb supports any USB transfer mode except isochronous. It’s much safer to do this kind of thing in user-space.

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