feat(telemetry): add configurable DS18B20 sensor

test/test_ds18b20/test_main.cpp

@@ -0,0 +1,52 @@
+#include "TestUtil.h"
+#include "modules/Telemetry/Sensor/DS18B20Protocol.h"
+#include <cstdlib>
+#include <unity.h>
+
+void setUp(void) {}
+void tearDown(void) {}
+
+void test_decodes_positive_12_bit_temperature()
+{
+    const uint8_t scratchpad[9] = {0x91, 0x01}; // 25.0625 C
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 25.0625f, ds18b20::decodeTemperature(scratchpad));
+}
+
+void test_decodes_negative_12_bit_temperature()
+{
+    const uint8_t scratchpad[9] = {0x5E, 0xFF}; // -10.125 C
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, -10.125f, ds18b20::decodeTemperature(scratchpad));
+}
+
+void test_accepts_ds18b20_operating_range()
+{
+    TEST_ASSERT_TRUE(ds18b20::isSaneTemperature(-55.0f));
+    TEST_ASSERT_TRUE(ds18b20::isSaneTemperature(125.0f));
+    TEST_ASSERT_FALSE(ds18b20::isSaneTemperature(-55.1f));
+    TEST_ASSERT_FALSE(ds18b20::isSaneTemperature(125.1f));
+}
+
+void test_recognizes_resolution_configuration()
+{
+    uint8_t scratchpad[ds18b20::SCRATCHPAD_SIZE]{};
+    for (uint8_t resolution = 9; resolution <= 12; ++resolution) {
+        scratchpad[ds18b20::SCRATCHPAD_CONFIG_INDEX] = ds18b20::configForResolution(resolution);
+        TEST_ASSERT_TRUE(ds18b20::hasResolution(scratchpad, resolution));
+    }
+
+    scratchpad[ds18b20::SCRATCHPAD_CONFIG_INDEX] = ds18b20::configForResolution(9);
+    TEST_ASSERT_FALSE(ds18b20::hasResolution(scratchpad, 12));
+}
+
+void setup()
+{
+    initializeTestEnvironment();
+    UNITY_BEGIN();
+    RUN_TEST(test_decodes_positive_12_bit_temperature);
+    RUN_TEST(test_decodes_negative_12_bit_temperature);
+    RUN_TEST(test_accepts_ds18b20_operating_range);
+    RUN_TEST(test_recognizes_resolution_configuration);
+    exit(UNITY_END());
+}
+
+void loop() {}