A C library for interfacing with Microchip's MCP23 series GPIO expanders on Linux systems. Supports MCP23S08 (SPI), MCP23S09 (SPI), and MCP23009 (I2C) devices.
linux microcontroller embedded i2c spi c-library mcp23008 spidev mcp23s08 mcp23009 mcp23s09 hardware-abstraction-layer
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Updated
Oct 30, 2025 - C