Hi Luis,
I just checked a roach in our configuration and it reports the same error. The DTT configuration is bundled with the shipped version of uboot and likely doesn't point to the correct i2c device. if you gain access to the uboot prompt and enter => rmon You will see a dump of roach specific sensors, Temp, Voltage, Current, and fan RPM AFIK these are also available in sysfs at: /sys/class/i2c-adapter/i2c-0/0-000f But back to topic, it it okay to ignore. Regards Adam On Tue, Mar 29, 2011 at 12:40 AM, Luis Quintero <[email protected]> wrote: > All, > > I received three brand new Roach boards few weeks ago, and I noted an error > while U-Boot is initializing: DTT: 1 FAILED INIT. See attachment for more > information. > > According to the CASPER wiki page, I have the latest U-Boot version[1]. > This info is from one of my boards: U-Boot 2008.10-svn3231 (Jul 15 2010 - > 14:58:38). > > I wonder if I can ignore this warning/error or if someone knows how to fix > this problem? Is here: http://casper.berkeley.edu/svn/trunk/roach/sw/ the > latest source-code/binaries versions of everything (bootloader, kernel, > etc)? > > I was looking around in the U-Boot config[2] (first time playing with this > bootloader!), trying to find the temperature sensor (DTT) definition. Is the > this temperature sensor the AD7414-0 IC connected to the I2C (I2C0_xxx) port > of the PowerPC? > > According to the U-Boot messages, I2C is ready. Is there a way to interact > this I2C device using U-Boot commands? I typed "iprobe" to discover chip > addresses, getting: > > Valid chip addresses: 0F 4D 50 52 53 54 55 > > But I can not see the 0x49 address in this list. The valid addresses for > the AD7414-0 chip are 0x48, 0x49 and 0x4A, depending of the STTM_AS pin. Is > possible that this is causing the failure? What are the I2C devices > available in the board? > > Am I right about all this? > > [1] CASPER, LatestVersions, http://casper.berkeley.edu/wiki/LatestVersions > [2] > http://casper.berkeley.edu/svn/trunk/roach/sw/uboot/include/configs/roach.h > > Thanks, > > -- Luis Quintero, Arecibo Observatory > > -- *Adam Barta* c: +27 72 105 8611 g: +1 323 744 0311 e: [email protected] w: www.qip.co.za
