Hi Martin,
Simulink primarily interfaces with AXI-connected peripherals on the PL (Programmable Logic) side.
You can try the below approaches to control MIO pins directly from the PS (Processing System):
- In Simulink, you can use MATLAB Function blocks to write custom C code that interacts with the PS registers directly. In this way, you could set MIO pins configured as GPIO without needing to go through the PL.
- You would need to use memory-mapped I/O register addresses for the GPIO configuration. By embedding C code into Simulink via MATLAB Function blocks or S-Function blocks, you can control these registers to set the MIO pin state.
- Create your Simulink model for the Zynq platform using the Embedded Coder support package for Xilinx devices.
- Use blocks from the Zynq library to interface with the PS, but direct control of MIO pins might not be available directly from Simulink blocks.
- Use Embedded Coder to generate C code for the processing system. This code will be integrated into the ARM processor on the Zynq.
- Once the code is generated, you may need to manually modify it to include control over the MIO pins. This involves adding specific register writes to control the GPIO settings.
- You can do this by editing the generated C code to include the necessary GPIO configuration and control commands.
- After modifying the code, you can use Xilinx SDK (or Vitis) to compile and deploy the application to the Zynq board.
- In your C code, make sure to include the necessary Xilinx libraries and headers that facilitate GPIO control.
You can refer the below link for more info on “S-function” and “MATLAB function” blocks
