Date: Fri, 02 Mar 2007 10:17:44 -0700 (MST) From: Warner Losh <imp@bsdimp.com> To: krassi@bulinfo.net Cc: freebsd-arm@FreeBSD.org Subject: Re: IIC support? Message-ID: <20070302.101744.115917142.imp@bsdimp.com> In-Reply-To: <45E83CAB.1090005@bulinfo.net> References: <45E83CAB.1090005@bulinfo.net>
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> I have problems to access the iic eeprom from userland. Even after set > SCAN_IICBUS in iicbus.c nothing has been detected. I have made some > tests from the bootloader to read/write from/to the eeprom and they work. > Is there any known problems with TWI or any differences between board > settings? The IIC bus is not a self enumerating bus. Bad things happen when you go out and try to 'probe' it, although often you can get away with that. FreeBSD takes a conservative approach. You need hints for each iic device on bus that you have on your board. Warner
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