2007-07-26 05:07 AM
2007-07-16 05:18 AM
Hello,
I'm using a ST10F269. I noticed a conflict between CAN2 node and RTC. When I change the configuration of the RTC, it also modifies the configuration of the CAN2 registers. I saw on another ST forum that one guy had the same issue. This is not written in any errata sheet I have seen. My problem: When I read the RTC counter value, sometimes I get a value lower than the previous. For example, if I sample the RTC every second, sometimes I will read a value lower than the previous. Let's say I read 0x00101234 then I will read 0x00101200. The RTC is set in a free running mode without alamr and with a resolution of 499.8µs Any idea? Have you seen this problem?2007-07-18 03:37 AM
Hello,
Thanks for your answer. Before I answer your question. Can you tell me why ST is not giving us any errat sheet with this CAN2 vs RTC bug?? Timer 4 is used as 1s tick. (Group 0 and Priority 4) In the isr I have this code ulTemp = (unsigned long)RTCL + (((unsigned long)RTCH) << 16); rt_trace_buf[rt_trace_in].ucTraceData = TraceData; rt_trace_buf[rt_trace_in].uiTraceID = TraceCode; rt_trace_buf[rt_trace_in].ulTraceTime = ulTemp; if (rt_trace_buf[rt_trace_in].ulTraceTime < rt_trace_buf [rt_trace_in-1].ulTraceTime) { printf(''RTT error\n''); } and sometimes, I see the ''RTT error'' message on my terminal. I would say it happens 2 times every 10 seconds. I have a lot of interrupts. But when I read RTC values I disable interrupt (IEN = 0) to be sure nothing will prevent me to read it. This answer your question? Any idea??? Thanks a lot for your attention, Best regards Thibault2007-07-26 05:07 AM
ANY IDEA??????????????????????????,