Keep temperature valid for 15 minutes

3 files changed, 8 insertions, 5 deletions

diff --git a/src/temperature/main.c b/src/temperature/main.c
index 2ee9bc6..06b753f 100644
--- a/src/temperature/main.c
+++ b/src/temperature/main.c
@@ -97,7 +97,9 @@ static void detect_button_press(void *pvParameters)
 
             char t[32];
             // For debugging purposes only. snprinf has issues with %f
-            snprintf(t, 32, "%d.%02d", (int)temperature_get(), (int)(temperature_get() * 100.0 - (int)(temperature_get()) * 100.0));
+            float temp = 0;
+            int temp_valid = temperature_get(&temp);
+            snprintf(t, 32, "%d.%02d", (int)temp, (int)(temp * 100.0 - (int)temp * 100.0));
             debug_print(t);
 
             int32_t pressure = 0;
diff --git a/src/temperature/temperature.c b/src/temperature/temperature.c
index b9e95e2..575fa79 100644
--- a/src/temperature/temperature.c
+++ b/src/temperature/temperature.c
@@ -12,6 +12,7 @@ void temperature_update() {
     temperature_value = ((ADC_GetConversionValue(ADC1) * TEMP_V_BOARD / 0xFFF) - TEMP_V25) / TEMP_AVG_SLOPE + 25.0;
 }
 
-float temperature_get() {
-    return temperature_value;
+int temperature_get(float *temp) {
+    *temp = temperature_value;
+    return 1;
 }
diff --git a/src/temperature/temperature.h b/src/temperature/temperature.h
index ebe8f8b..0c1ba2e 100644
--- a/src/temperature/temperature.h
+++ b/src/temperature/temperature.h
@@ -5,5 +5,5 @@
 // Conpute the current temperature
 void temperature_update();
 
-// Return the current temperature
-float temperature_get();
+// Return 1 if the the current temperature is valid, and write it into temp
+int temperature_get(float *temp);