Simulation chip for Wokwi Based on template: https://github.com/wokwi/inverter-chip
| Name | Description |
|---|---|
| SCK | SPI Clock |
| MOSI | Data IN |
| CS | Chip Select |
| DS | DS |
| RST | Reset |
| VCC | VCC |
| GND | Supply voltage |
| A0-7 | A GPIO (Bank 0) |
| B0-7 | B GPIO (Bank 1) |
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IODIR - I/O Direction
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IPOL - I/O Polarity Inversion
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IOCON - Configuration Register
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GPIO - Read/Write port information
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Note: Inturruption handling is not implemented at this time. PRs welcome.
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Note: Sequential Write/Read is not supported (Only Single Read/Write is currently supported).
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Note: Only BANK=0 mode is supported.
Tested with https://github.com/RobTillaart/MCP23S17.
To use this chip in your project, include it as a dependency in your diagram.json file:
"dependencies": {
"chip-mcp23s17": "github:martysweet/[email protected]"
}Then, add the chip to your circuit by adding a mcp23s17 item to the parts section of diagram.json:
"parts": {
...,
{ "type": "chip-mcp23s17", "id": "multiplexer" }
},
The actual source code for the chip lives in src/main.c, and the pins are described in chip.json.
The easiest way to build the project is to open it inside a Visual Studio Code dev container, and then run the make command.
You can test this project using the Wokwi extension for VS Code. Open the project with Visual Studio Code, press "F1" and select "Wokwi: Start Simulator".
If you want to make changes to the test project firmware, see the test folder, and then run make test to rebuild the .hex file. You'll need the arduino-cli, which is already installed in the dev container.
This project is licensed under the MIT license. See the LICENSE file for more details.