Move battery measurement to its own class

1 files changed, 37 insertions, 0 deletions

diff --git a/src/drivers/include/adc.hpp b/src/drivers/include/adc.hpp
new file mode 100644
index 00000000..3e94a9ee
--- /dev/null
+++ b/src/drivers/include/adc.hpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include "esp_adc/adc_cali.h"
+#include "esp_adc/adc_oneshot.h"
+#include "esp_err.h"
+#include "result.hpp"
+
+namespace drivers {
+
+/*
+ * Handles measuring the battery's current voltage.
+ */
+class AdcBattery {
+ public:
+  static auto Create() -> AdcBattery* { return new AdcBattery(); }
+  AdcBattery();
+  ~AdcBattery();
+
+  /**
+   * Returns the current battery level in millivolts.
+   */
+  auto Millivolts() -> uint32_t;
+
+ private:
+  adc_oneshot_unit_handle_t adc_handle_;
+  adc_cali_handle_t adc_calibration_handle_;
+};
+
+}  // namespace drivers