怎么使用eTimer捕获下降沿事件的时间戳

大家好，
我在SPC560 P40 L3上工作，我想在SECSRC''计数器＃0输入引脚'上捕获下降沿事件的时间戳。
我在C [11]引脚交替功能上的etimer0通道0上映射了一个方波信号。
我可以通过Trace 32看到我的信号从高状态转换到低状态。所以我认为我的信号正确映射到输入。
这是我的eTimer频道0配置：
我的信号具有12.5 kHz的滴答时间和16 Mhz的SYSCLOCK。
不幸的是，CAPT 1注册没有事件。
首先，我想知道一些时间同步问题，但当我选择''计算主要来源的上升沿，而次要输入高有效'时，CNTR就停止了。所以我怀疑计数器＃0输入引脚与我的输入信号没有关联。当我用SIPS寄存器更改SECSRC极性时，我可以手动查看CAPT 1上的值，但仅此而已。
我的eTimer配置寄存器有任何错误吗？我也想知道如何使用128预分频器同步IP总线时钟和传感器信号滴答时间。
谢谢。
最好的祝福，
弗洛伦特广场



以下为原文




Hello everyone,
I work on a SPC560 P40 L3 and I would to capture timestamps on falling edge events on SECSRC ''Counter #0 input pin''.
I have one square signal mapped on eTimer0 channel 0 on the C[11] pin alternate function.
I could see my signal shift from high state to low state with Trace 32. So I think my signal is correctly mapped to the input.
Here is my eTimer channel 0 configuration  :
I have a signal with a 12,5 kHz tick time and a 16 Mhz SYSCLOCK.
Unfortunately, there is no events on CAPT 1 register.
First, I was wondering for some time synchronization issues but when I select ''Count rising edges of primary source while secondary input high active'' CNTR just stop. So I suspect that the counter #0 input pin is not linked with my input signal. I could manually see values on CAPT 1 when I change SECSRC polarity with the SIPS register, but thats all.
Is there any mistakes with my eTimer configuration register ? I am also wondering how I could synchronize IP bus clock and my sensor signal tick time with just a 128 prescaler.
Thanks.
Best regards,
Florent Plazas