On 8/29/2014 10:38 AM, Alan Cudmore wrote: > I was able to get the ds1307 i2c part working on the Pi. The tod.c > driver shell was calling setRealTimeToRTEMS() but it was failing in > rtems_clock_set because my driver was not returning the correct > rtems_tod format. > Now when I boot the Pi, the rtems time is synced to the battery backed RTC. That's great news!
--joel > Thanks, > Alan > > On 8/28/2014 1:26 PM, Joel Sherrill wrote: >> On 8/28/2014 12:16 PM, Alan Cudmore wrote: >>> I am testing out the Raspberry Pi I2C interface by implementing a >>> DS1307 RTC driver. >>> >>> I started with the libchip/rtc/ds1375.c driver, since it is very close >>> to the 1307. >>> >>> In the Raspberry Pi BSP, I added code to i2c_init.c to create a raw >>> device node for the RTC device, then I added the tod/todcfg.h similar >>> to the powerpc/mvme3100 BSP. >>> >>> Using the test functions I can read and write the device, but is there >>> anything else I need to do in order to tie it to the RTEMS time functions? >>> >>> For example: >>> In the shell ( main_date.c ) , the time() function just returns the >>> 1998 epoch. Also, the shell rtc command ( main_rtc.c ) calls >>> rtems_clock_get_tod, but returns a error. If I use the RTC command and >>> set the time, it does try to write to my device and subsequent calls >>> to rtems_clock_tod do not return an error. >>> >>> Am I missing any setup here? >>> >>> Finally, is RTC the same as TOD for RTEMS? >>> >> It is a source to set the TOD from. There are some ugly APIs provided >> by the RTC driver shell code. They really need new names but I haven't >> had any good ideas. :( >> >> See libbsp/shared/tod.c. >> >> setRealTimeFromRTEMS() is probably the missing call you are looking >> for. >>> Thanks, >>> Alan -- Joel Sherrill, Ph.D. Director of Research & Development joel.sherr...@oarcorp.com On-Line Applications Research Ask me about RTEMS: a free RTOS Huntsville AL 35805 Support Available (256) 722-9985 _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
