test(die-temp): unit test for die temperature

test calculation function Signed-off-by: Cyril Fougeray <[email protected]>
worldcoin · Dec 23, 2024 · fb340f0 · fb340f0
1 parent 7d52b3f
commit fb340f0
Showing 1 changed file with 19 additions and 8 deletions.
diff --git a/main_board/src/temperature/sensors/temperature.c b/main_board/src/temperature/sensors/temperature.c
@@ -46,15 +46,13 @@ BUILD_ASSERT((int)(MAIN_BOARD_OVERTEMP_C - OVERTEMP_TO_NOMINAL_DROP_C) > 0 &&
              "Unsigned integer will underflow");
 
 static const uint16_t *cal1_addr =
-    (uint16_t *)DT_PROP(DT_INST(0, st_stm32_temp_cal), ts_cal1_addr);
-static const int16_t cal1_temp =
-    DT_PROP(DT_INST(0, st_stm32_temp_cal), ts_cal1_temp);
+    (uint16_t *)DT_PROP(DT_NODELABEL(die_temp), ts_cal1_addr);
+static const int16_t cal1_temp = DT_PROP(DT_NODELABEL(die_temp), ts_cal1_temp);
 static const uint16_t *cal2_addr =
-    (uint16_t *)DT_PROP(DT_INST(0, st_stm32_temp_cal), ts_cal2_addr);
-static const int16_t cal2_temp =
-    DT_PROP(DT_INST(0, st_stm32_temp_cal), ts_cal2_temp);
+    (uint16_t *)DT_PROP(DT_NODELABEL(die_temp), ts_cal2_addr);
+static const int16_t cal2_temp = DT_PROP(DT_NODELABEL(die_temp), ts_cal2_temp);
 static const uint16_t cal_vref_mv =
-    DT_PROP(DT_INST(0, st_stm32_temp_cal), ts_cal_vrefanalog);
+    DT_PROP(DT_NODELABEL(die_temp), ts_cal_vrefanalog);
 
 struct sensor_and_channel; // forward declaration
 
@@ -489,7 +487,7 @@ init_sensor_and_channel(struct sensor_and_channel *x)
 }
 
 static int16_t
-calculate_die_temperature(uint16_t vref_mv, uint16_t ts_data_raw)
+calculate_die_temperature(const uint16_t vref_mv, const uint16_t ts_data_raw)
 {
     int32_t temperature_degrees = ((int32_t)cal2_temp - (int32_t)cal1_temp) *
                                   ts_data_raw * vref_mv / cal_vref_mv /
@@ -938,6 +936,19 @@ overtemp_callback(struct sensor_and_channel *sensor_and_channel)
 
 #include <zephyr/ztest.h>
 
+ZTEST(hil, test_calculate_die_temperature)
+{
+    uint16_t vref_mv = 2048;
+    uint16_t ts_data_raw = 1530;
+
+    int16_t temperature = calculate_die_temperature(vref_mv, ts_data_raw);
+    zassert_equal(temperature, 31);
+
+    ts_data_raw = 0;
+    temperature = calculate_die_temperature(vref_mv, ts_data_raw);
+    zassert_equal(temperature, -277);
+}
+
 ZTEST(hil, test_overtemp)
 {
 #define FAKE_SENSOR_OVERTEMP_C 50