Shadowtrance
dbf850c434
- M5 Unit Modules library + M5 Unit Test app - Minor fixes for TodoList, TwoEleven, Snake, Brainfuck and Breakout - Fixed SerialConsole to use the uart controller as it was broken in one of the many updates - Fixed keyboard input in TwoEleven, Breakout, Magic8Ball and Snake - Bluetooth Media Keys app, supports pressing physical keys to trigger the corresponding buttonmatrix button - Epub Reader app
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
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* UnitPaHub.h - M5Stack PaHub v2 I2C multiplexer (TCA9548A, addr 0x70)
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*
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* 6-channel I2C mux. Selecting a channel routes the downstream bus to that
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* port only. Selecting channel 255 (or calling deselect()) disables all ports.
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*
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* Usage:
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* UnitPaHub hub;
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* if (hub.begin(dev)) {
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* hub.select(0); // enable channel 0
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* enc.begin(dev); // devices on channel 0 now reachable
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* hub.deselect(); // disable all channels when done
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* }
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*
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* Note: for devices that stay selected for extended periods (e.g. polling),
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* leave the channel selected - only call deselect() if you need to prevent
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* address conflicts between units on different channels.
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*/
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#pragma once
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#include <UnitCommon.h>
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#include <cstdint>
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class UnitPaHub {
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public:
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UnitPaHub() = default;
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UnitPaHub(const UnitPaHub&) = delete;
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UnitPaHub& operator=(const UnitPaHub&) = delete;
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static constexpr uint8_t DEFAULT_ADDR = 0x70;
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static constexpr uint8_t NUM_CHANNELS = 6;
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static constexpr uint8_t NO_CHANNEL = 0xFF;
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// Pass a I2C controller device
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bool begin(Device* dev, uint8_t addr = DEFAULT_ADDR);
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bool isPresent() const { return dev_ != nullptr; }
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// Select a single channel (0-5). Returns false on error.
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bool select(uint8_t channel);
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// Disable all channels.
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bool deselect();
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uint8_t currentChannel() const { return channel_; }
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private:
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Device* dev_ = nullptr;
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uint8_t addr_ = DEFAULT_ADDR;
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uint8_t channel_ = NO_CHANNEL;
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};
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