mirror of
https://github.com/Threnklyn/esphome-dev.git
synced 2026-06-02 02:58:26 +02:00
Keith Burzinski
86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/esphal.h"
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#include "esphome/components/i2c/i2c.h"
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namespace esphome {
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namespace mcp23017 {
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/// Modes for MCP23017 pins
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enum MCP23017GPIOMode : uint8_t {
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MCP23017_INPUT = INPUT, // 0x00
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MCP23017_INPUT_PULLUP = INPUT_PULLUP, // 0x02
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MCP23017_OUTPUT = OUTPUT // 0x01
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};
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enum MCP23017GPIORegisters {
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// A side
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MCP23017_IODIRA = 0x00,
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MCP23017_IPOLA = 0x02,
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MCP23017_GPINTENA = 0x04,
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MCP23017_DEFVALA = 0x06,
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MCP23017_INTCONA = 0x08,
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MCP23017_IOCONA = 0x0A,
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MCP23017_GPPUA = 0x0C,
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MCP23017_INTFA = 0x0E,
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MCP23017_INTCAPA = 0x10,
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MCP23017_GPIOA = 0x12,
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MCP23017_OLATA = 0x14,
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// B side
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MCP23017_IODIRB = 0x01,
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MCP23017_IPOLB = 0x03,
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MCP23017_GPINTENB = 0x05,
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MCP23017_DEFVALB = 0x07,
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MCP23017_INTCONB = 0x09,
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MCP23017_IOCONB = 0x0B,
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MCP23017_GPPUB = 0x0D,
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MCP23017_INTFB = 0x0F,
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MCP23017_INTCAPB = 0x11,
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MCP23017_GPIOB = 0x13,
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MCP23017_OLATB = 0x15,
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};
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class MCP23017 : public Component, public i2c::I2CDevice {
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public:
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MCP23017() = default;
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void setup() override;
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bool digital_read(uint8_t pin);
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void digital_write(uint8_t pin, bool value);
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void pin_mode(uint8_t pin, uint8_t mode);
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void set_open_drain_ints(const bool value) { open_drain_ints_ = value; }
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float get_setup_priority() const override;
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protected:
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// read a given register
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bool read_reg_(uint8_t reg, uint8_t *value);
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// write a value to a given register
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bool write_reg_(uint8_t reg, uint8_t value);
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// update registers with given pin value.
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void update_reg_(uint8_t pin, bool pin_value, uint8_t reg_a);
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uint8_t olat_a_{0x00};
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uint8_t olat_b_{0x00};
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bool open_drain_ints_;
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};
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class MCP23017GPIOPin : public GPIOPin {
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public:
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MCP23017GPIOPin(MCP23017 *parent, uint8_t pin, uint8_t mode, bool inverted = false);
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void setup() override;
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void pin_mode(uint8_t mode) override;
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bool digital_read() override;
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void digital_write(bool value) override;
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protected:
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MCP23017 *parent_;
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};
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} // namespace mcp23017
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} // namespace esphome
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