In Simulink, the "For Each" block is used to perform iterative operations on each element or subarray of an input signal. However, modifying the size of a lookup table (or any other parameter that affects the model's structure) during simulation is generally not supported directly within a "For Each" block. This is because Simulink models are typically compiled before simulation, and changes to the structure (like the size of a lookup table) require recompilation.
I've tried out various methods to come up with a workaround.
- Using MLFB block to mimic the behaviour of LUT (by passing an additional mask parameter "index" and partitioning it to access the data from the original struct). This approach fails, with the error message: Mixed field types in structure arrays are not supported. Type at 'param(1).x1' differed from type at 'param(2).x1'.
- Similarly, I tried using the partitioned value of "index" mask parameter to directly set the LUT Block parameter. This approach too, seems to fail with an error message mentioning that LUT Block parameters are runtime and cannot be changed during execution.
Given that the above solutions do not work as well, I think your requirement may not be catered by the intended use of "For Each" block in Simulink, and you may have to replicate your subsystem to create this functionality.
