Hi @Senlent ,
I would like to know the order of signals that is stored in the BCTU FIFO considering trigger offsets.
ADC0 signals are grouped together and a single trigger triggers it (no cross triggering). The same is done with ADC1 and ADC2.
Now, since I have offset the triggers, I would expect that the BCTU FIFO is filled in the order of the offset.
Consider the example that I sent you (all in OPWMT mode):
EMIOS_0_3 has an offset value of 1
EMIOS_0_1 has an offset of 312
EMIOS_0_2 has an offset of 416
Here is my BCTU configuration
When I plotted the eMIOS trigger I can see the trigger offset on the oscilloscope.
Considering that the BCTU FIFO is empty at the start, I expect that the EMIOS_0_3 will be the first to generate a trigger to the BCTU. The signals ADC0_A_RD and ADC0_B_RD will be sampled first and will be filled in the BCTU FIFO[0] and BCTU FIFO[1].
The next trigger will be EMIOS_0_1 and will sample the signals ADC1_A and ADC1_B. These 2 values will be stored in the BCTU FIFO[2] and BCTU FIFO[3] respectively.
Finally the last trigger EMIOS_0_2 which will sample ADC2_A and ADC2_B and store it in BCTU FIFO[2] and BCTU FIFO[3] respectively.
But when I read the first 6 BCTU FIFO values using Bctu_Ip_GetFifoResult API I see the following order
This is not as per the expectation. Could you help me with what is going wrong?
P.S.: The sample time for all the ADC's are the same.
Hi@Ayaz
This is probably because the interval between your emios triggering BCTU is too short, causing a timing error. You can increase the trigger interval and try again.
Hi@Samuel_DCosta
Please ignore the previous answer
1.Would the 'BCTU Trigger' be triggered every time the ADC is triggered by the BCTU (BCTU output trigger) or the eMIOS triggers the BCTU (BCTU input trigger)?
According to the BCTU MCR->TRGF register,it should be the fisrt one which is BCTU output trigger to ADC.
2.Also, if we have a MPC (cross trigger) where the 6 signals were triggered in the below way:
- signal 1 and signal 2 parallelly sampled
- signal 3 and signal 4 parallelly sampled
- signal 5 and signal 6 parallelly sampled
Would we still see the 'BCTU Trigger' triggered 6 times or 3?
This is related to your BCTU configuration. You need to give me a specific configuration so that I can answer your question.
In short, there is no problem with your project and your's understanding is right.
I modified your demo and tested it.（Please refer to the attachments）
The incorrect data order in the FIFO may be caused by the following reasons.
You will find that this is because there are some problems in the first cycle of PWM, which leads to inconsistent FIFO storage order.
I modified the trigger points of OPWMT to Ch3, Ch1, Ch2, the watermask value is 3, and the sampling is 4 times each time the trigger is triggered, for a total of 12 samples.
