Re: [uslcom][patch] Add GPIO support

2011-11-12 Thread JD Louw
On Sat, Nov 12, 2011 at 9:39 AM, Hans Petter Selasky hsela...@c2i.net wrote: On Friday 11 November 2011 22:06:19 JD Louw wrote: This patch adds custom IOCTLs to read and write the 4 GPIO pins on the cp2103 usb-to-serial chip. Time from IOCTL to actual pin change is pretty slow though. Hi,

Re: [uslcom][patch] Add GPIO support

2011-11-12 Thread Hans Petter Selasky
On Friday 11 November 2011 22:06:19 JD Louw wrote: JD Louw jdl@gmail.com Hi, In IOCTL's you shouldn't cast *(uint8_t *)ptr to *(int *)ptr and forth and back, because this only works on little endian machines. Else your patch looks very good. I'm impressed. Please download the latest

[uslcom][patch] Add GPIO support

2011-11-11 Thread JD Louw
This patch adds custom IOCTLs to read and write the 4 GPIO pins on the cp2103 usb-to-serial chip. Time from IOCTL to actual pin change is pretty slow though. Index: serial/uslcom.c === --- serial/uslcom.c (revision 227453) +++

Re: [uslcom][patch] Add GPIO support

2011-11-11 Thread Hans Petter Selasky
On Friday 11 November 2011 22:06:19 JD Louw wrote: This patch adds custom IOCTLs to read and write the 4 GPIO pins on the cp2103 usb-to-serial chip. Time from IOCTL to actual pin change is pretty slow though. Hi, How slow is it? Have you tried reducing the interval of the intervalled control