当ACS9521工作在slave模式,上图红色框内的目的在于产生path delay,它用于实现slave与master的相位同步(时间同步)。 当ACS9521工作在master模式,Frequency and Time Generator产生的PTPoutClk[3:0]与1PPS/1Hz/1PPns[1:0]时间同步,后者与PTPInClk[7:0]中的一个时间同步,所以最终,这三个都是时间同步的。 PTP Por...
当ACS9521工作在slave模式,上图红色框内的目的在于产生path delay,它用于实现slave与master的相位同步(时间同步)。 当ACS9521工作在master模式,Frequency and Time Generator产生的PTPoutClk[3:0]与1PPS/1Hz/1PPns[1:0]时间同步,后者与PTPInClk[7:0]中的一个时间同步,所以最终,这三个都是时间同步的。 PTP Por...
当ACS9521工作在slave模式,上图红色框内的目的在于产生path delay,它用于实现slave与master的相位同步(时间同步)。 当ACS9521工作在master模式,Frequency and Time Generator产生的PTPoutClk[3:0]与1PPS/1Hz/1PPns[1:0]时间同步,后者与PTPInClk[7:0]中的一个时间同步,所以最终,这三个都是时间同步的。 PTP Por...
req.type=PTP_CLK_REQ_PPS; enable=arg?1:0; err=ops->enable(ops,&req,enable); break; casePTP_SYS_OFFSET: sysoff=kmalloc(sizeof(*sysoff),GFP_KERNEL); if(!sysoff){ err=-ENOMEM; break; } if(copy_from_user(sysoff,(void__user*)arg, ...
The timestamp device cannot detect the 1 PPS trigger. Check hardware configuration. 1007 Invalid G.82651 profile master clock class (%d) reported, new master rejected, master port ID = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x.%d Invalid clock class for G.8265.1 profile. The allowed values ...
.pps = true, .n_ext_ts = 6, .n_per_out = 5, }; static void __ptp_ocp_clear_drift_locked(struct ptp_ocp *bp) { u32 ctrl, select; select = ioread32(&bp->reg->select); iowrite32(OCP_SELECT_CLK_REG, &bp->reg->select); iowrite32(0, &bp->reg->drift_ns); ctrl =...
表 22. PPS Synchronization Test Results(1) MEAN –869 ps (1) Synchronized to master using IEEE 1588 PTP STANDARD DEVIATION 7.87 ns NO OF SAMPLES 1000 7.4.3 Clock Synchronization Test Results Testing the PPS signal time synchronization was achieved by analyzing the clock output signals from both...
For many older systems, the PPS signal is the only way to measure the success of time synchronization. The primary disadvantage to this measurement is that this effectively samples the error every second. Because there is not necessarily a correlation between the second transition and the clock ...
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