add functions for bit setting and checking

due_obd2/due_obd2.ino

@@ -310,6 +310,9 @@ void on_main_enter()
     display.setColor(VGA_AQUA);
 }
 
+/**
+ * @brief      Main loop of the main state. Queries the OBD2 scanner for values and updates the display.
+ */
 void on_main_run()
 {
     if (update_slow)

due_obd2/obd2_elm327.cpp

@@ -52,6 +52,21 @@ void obd2_elm327_get_state(obd2_elm327_t *elm327, char *state)
     strcpy(state, bt_states[elm327->bt_state]);
 }
 
+char obd2_el327_is_bit_set(obd2_elm327_t *elm327, uint16_t pos)
+{
+    return elm327->value_updates & (1 << pos);
+}
+
+void obd2_el327_set_bit(obd2_elm327_t *elm327, uint16_t pos)
+{
+    elm327->value_updates |= (1 << pos);
+}
+
+void obd2_el327_clear_bit(obd2_elm327_t *elm327, uint16_t pos)
+{
+    elm327->value_updates &= ~(1 << pos);
+}
+
 void obd2_elm327_check_connection(obd2_elm327_t *elm327)
 {
     if (elm327->bt_state != BT_CONNECTED)

due_obd2/obd2_elm327.h

@@ -132,6 +132,23 @@ void obd2_elm327_check_connection(obd2_elm327_t *elm327);
  */
 void obd2_elm327_get_state(obd2_elm327_t *elm327, char *state);
 
+/**
+ * @brief checks if a bit is set in the value_updates variable
+ * 
+ * @returns 1 if the bit is set, 0 if not
+ */
+char obd2_el327_is_bit_set(obd2_elm327_t *elm327, uint16_t pos);
+
+/**
+ * @brief sets a bit in the value_updates variable
+ */
+void obd2_el327_set_bit(obd2_elm327_t *elm327, uint16_t pos);
+
+/**
+ * @brief clears a bit in the value_updates variable
+ */
+void obd2_el327_clear_bit(obd2_elm327_t *elm327, uint16_t pos);
+
 #ifdef __cplusplus
  }
 #endif