I have a question about the ComputeElectricAngle modue.
the value of Nmax in model workspace is 10000 , how to calculate the theta.
(speed_reference(rad/s) - Speed_Max(rad/s))*(2*pi/60)*PP*Nmax*(C_LST/2/pi)*(2^31)*pi?
I am confusing what exactly does this formula mean?
can you help me answer it ,
thank you very much
best regards
hao
Hi Leon,
In respect with the:
#define FMSTR_REC_BUFF_SIZE 12278 /* built-in buffer size */
You need to check the map file generated for the your application and check how much space you have available in RAM.
This is a parameter that depends on the data size of your application. Ideally you want this buffer to big as big as possible but keep in mind that RAM size is limited - therefore you need a trade off.
Once you found how much space you have available in RAM you can then allocate that space for the FreeMASTER buffer.
1) Is there an Option to increase the "current on-board Recorder Memory" and so the number of samples in freemaster or is it a fix value which depends on the embeeded Hardware (in my case HVP-MC3PH) ?
Nothing automatically. you will need to compute it as shown above.
2) The x-Axis is labeled with "Index" and not with "time". Also if I create a new recorder. How to Change this ?
Looks to a SW glitch probably due to import between different versions of FreeMASTER. Try to unselect and select back the option "Append units name to the label"
It seems to do the trick on my side - i hope it works for you too.
Best regards,
Daniel
Hi Leon,
1) If I choose Short_INTR = 1 then the communication is not possible (with Poll Driven it works)
I'm not expert in FreeMASTER but i see there are some restrictions in using the drivers and the options from one platform to the other. Please check the manual attached.
2) Where do I find the information how much space I have available in RAM exactly in the map file ?
It is quite simple and depends on how you wish to tackle the problem.
- programmatic approach: you check where is the buffer defined:
/* statically allocated recorder buffer (FMSTR_REC_OWNBUFF is FALSE) */
static FMSTR_U8 pcm_pOwnRecBuffer[FMSTR_REC_BUFF_SIZE];The pcm_pOwnRecBuffer is statically defined in freemaster_rec.c file. This means it will be past of the BSS section for freemaster_rec.o
All you have to do now is to check the map file for mapping of BSS section of the freemaster_rec.o module
From linker file you compute how much space you still have available till the end of the segment
2. lazy approach: simply increase the size of the buffer and compare the memory files
Now increase the size until you get a linker error. You can do this very fast from Windows CMD by calling the *.bat file from the generated folder.
In this case i tried to allocate
/* built-in recorder buffer (use when FMSTR_REC_OWNBUFF is 0) */
#define FMSTR_REC_BUFF_SIZE 20000 /* built-in buffer size */and it failed, indicating the *.bss section and the memory regions involved.
3) For what are the Options Receive FIFO queue size, Support for Application Commands, Target-side address translation (TSA)) - should I use the Default KV values or your S32K ?
You should use the values from KV.
Best regards,
Daniel
