From 371f0a20cad4dfcb3237db6f72a7e35403950938 Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Fri, 30 Jun 2023 20:48:40 +1000
Subject: Clean up gpios interface

---
 src/drivers/include/gpio_expander.hpp | 148 ----------------------------------
 1 file changed, 148 deletions(-)
 delete mode 100644 src/drivers/include/gpio_expander.hpp

(limited to 'src/drivers/include/gpio_expander.hpp')

diff --git a/src/drivers/include/gpio_expander.hpp b/src/drivers/include/gpio_expander.hpp
deleted file mode 100644
index 8108d176..00000000
--- a/src/drivers/include/gpio_expander.hpp
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#pragma once
-
-#include <stdint.h>
-
-#include <atomic>
-#include <functional>
-#include <memory>
-#include <mutex>
-#include <optional>
-#include <tuple>
-#include <utility>
-
-#include "driver/i2c.h"
-#include "esp_check.h"
-#include "esp_err.h"
-#include "esp_log.h"
-#include "freertos/FreeRTOS.h"
-
-namespace drivers {
-
-/**
- * Wrapper for interfacing with the PCA8575 GPIO expander. Includes basic
- * low-level pin setting methods, as well as higher level convenience functions
- * for reading, writing, and atomically interacting with the SPI chip select
- * pins.
- *
- * Each method of this class can be called safely from any thread, and all
- * updates are guaranteed to be atomic. Any access to chip select related pins
- * should be done whilst holding `cs_lock` (preferably via the helper methods).
- */
-class GpioExpander {
- public:
-  static auto Create() -> GpioExpander*;
-  ~GpioExpander();
-
-  /*
-   * Convenience function for running some arbitrary pin writing code, then
-   * flushing a `Write()` to the expander. Example usage:
-   *
-   * ```
-   * gpio_.with([&](auto& gpio) {
-   *	gpio.set_pin(AUDIO_POWER_ENABLE, true);
-   * });
-   * ```
-   */
-  template <typename F>
-  auto with(F fn) -> void {
-    std::invoke(fn);
-    Write();
-  }
-
-  /**
-   * Sets the ports on the GPIO expander to the values currently represented
-   * in `ports`.
-   */
-  auto Write(void) -> bool;
-
-  /**
-   * Reads from the GPIO expander, populating `inputs` with the most recent
-   * values.
-   */
-  auto Read(void) -> bool;
-
-  /* Maps each pin of the expander to its number in a `pack`ed uint16. */
-  enum Pin {
-    // Port A
-    SD_MUX_SWITCH = 0,
-    SD_MUX_EN_ACTIVE_LOW = 1,
-    KEY_UP = 2,
-    KEY_DOWN = 3,
-    KEY_LOCK = 4,
-    DISPLAY_RESET_ACTIVE_LOW = 5,
-    // UNUSED = 6,
-    SD_CARD_POWER_ENABLE_ACTIVE_LOW = 7,
-
-    // Port B
-    PHONE_DETECT = 8,
-    AMP_EN = 9,
-    VOL_Z_CROSS = 10,
-    VOL_UP_DOWN = 11,
-    VOL_LEFT = 12,
-    VOL_RIGHT = 13,
-    // UNUSED = 14,
-    // UNUSED = 15,
-  };
-
-  /* Nicer value names for use with the SD_MUX_SWITCH pin. */
-  enum SdController {
-    SD_MUX_ESP = 0,
-    SD_MUX_SAMD = 1,
-  };
-
-  /**
-   * Returns the current driven status of each of the ports. The first byte is
-   * port a, and the second byte is port b.
-   */
-  std::atomic<uint16_t>& ports() { return ports_; }
-
-  /*
-   * Sets a single specific pin to the given value. `true` corresponds to
-   * HIGH, and `false` corresponds to LOW.
-   *
-   * Calls to this method will be buffered in memory until a call to `Write()`
-   * is made.
-   */
-  void set_pin(Pin pin, bool value);
-
-  /**
-   * Returns the input status of each of the ports. The first byte is port a,
-   * and the second byte is port b.
-   */
-  const std::atomic<uint16_t>& inputs() const { return inputs_; }
-
-  /* Returns the most recently cached value of the given pin. Only valid for
-   * pins used as inputs; to check what value we're driving a pin, use
-   * `ports()`.
-   */
-  bool get_input(Pin pin) const;
-
-  auto listener() -> std::weak_ptr<std::function<void(void)>>& {
-    return listener_;
-  }
-
-  auto set_listener(const std::weak_ptr<std::function<void(void)>>& l) -> void {
-    listener_ = l;
-  }
-
-  // Not copyable or movable. There should usually only ever be once instance
-  // of this class, and that instance will likely have a static lifetime.
-  GpioExpander(const GpioExpander&) = delete;
-  GpioExpander& operator=(const GpioExpander&) = delete;
-
- private:
-  GpioExpander();
-
-  std::atomic<uint16_t> ports_;
-  std::atomic<uint16_t> inputs_;
-
-  std::weak_ptr<std::function<void(void)>> listener_;
-};
-
-}  // namespace drivers
-- 
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