43 lines
2.6 KiB
Markdown
Executable File
43 lines
2.6 KiB
Markdown
Executable File
# MAX22200
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## How to use
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To access the MAX22200's registers, the TMC-API offers two functions: **max22200_readRegister** and **max22200_writeRegister**.
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Each of these functions takes in an **icID**, which is used to identify the IC when multiple ICs are connected. This identifier is passed down to the callback functions (see How to Integrate).
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## How to integrate: overview
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1. Include all the files of the TMC-API/ic/max22200/MAX22200 folder into the custom project.
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2. Include the MAX22200.h file in the custom source code.
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3. Implement the necessary callback functions (see below).
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## Accessing the MAX22200 via SPI
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One important thing to make sure is that the MISO pin of SPI is connected externally to the 3.3V via a 330 ohms resistor as show in the picture below.
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The following diagram depicts how to access the MAX22200 via SPI using the TMC-API.
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The description of the functions, in the above flowchart, are as follows:
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- The functions max22200_readRegister and max22200_writeRegister are used to read and write the registers respectively. These functions check the current active bus and call the bus-specific function i.e readRegisterSPI or writeRegisterSPI.
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- These bus specific functions construct the datagram and further call the bus specific callback 'max22200_readWriteSPI'.
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- This callback function further calls the hardware specific read/write function for SPI and needs to be implemented externally.
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### How to integrate: Callback functions
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Implement the following callback functions to access the chip via SPI:
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1. **max22200_readWriteSPI()**, which is a HAL wrapper function that provides the necessary hardware access. This function should also set the CMD pin to high for writing a register and set it low for reading a register. Please refer to the datasheet of the IC for further details.
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## Further info
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### Dependency graph for the ICs with new register R/W mechanism
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This graph illustrates the relationships between files within the TMC-API library, highlighting dependencies and identifying the files that are essential for integrating the library into custom projects.
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### Example usage: TMC-Evalsystem
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**For a reference usage of the TMC-API**, visit the [TMC-Evalsystem](https://github.com/analogdevicesinc/TMC-EvalSystem)
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## Migration status
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The MAX22200 has been reworked to the access system described above. For more infos on the status of this and other ICs, check out the [migration page](https://github.com/analogdevicesinc/TMC-API/issues/53). |