How to connect Raspberry Pi to DAC MCP 4921 using SPI Simulink blocks?

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Ben Depoorter
Ben Depoorter 2023-1-30
评论： Sylvain 2023-2-16
I want to set an output voltage with a RaspberryPi with an DAC MCP4921 using Simulink, in particular using the new block "SPI Register Write" available in the latest Simulink version (without writing C code or Matlab code). In this block is required a Register Address where SPI has to write the value from the slave. Can anyone help me?
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Sylvain
Sylvain 2023-2-16
Looking at the datasheet, the write command register is not defined.
Can you try the "SPI Master Transfer" block with a terminator for the output?
You should send the a vector of [2x1] uint8 for the upper half and the lower half.

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回答（1 个）

Mark McBroom
Mark McBroom 2023-2-5
Would you want to use the SPI Read/Write/Master blocks to communicate with this external device, similar to this example that uses SPI to communicate with an external EEPROM device?
https://www.mathworks.com/help/supportpkg/raspberrypi/ref/communicating-with-an-eeprom.html

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