added software timer instantiation + config (unused)

units/1wire/_ow_internal.h

@@ -19,6 +19,7 @@ struct priv {
 
     GPIO_TypeDef *port;
     uint32_t ll_pin;
+    TimerHandle_t busyWaitTimer; // timer used to wait for ds1820 measurement completion
 };
 
 // Prototypes

units/1wire/unit_1wire.c

@@ -76,12 +76,21 @@ static void U1WIRE_writeIni(Unit *unit, IniWriter *iw)
 
 // ------------------------------------------------------------------------
 
+static void U1WIRE_TimerCb(TimerHandle_t xTimer)
+{
+
+}
+
 /** Allocate data structure and set defaults */
 static error_t U1WIRE_preInit(Unit *unit)
 {
     struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
     if (priv == NULL) return E_OUT_OF_MEM;
 
+    // the timer is not started until needed
+    priv->busyWaitTimer = xTimerCreate("1w_tim", 750, false, unit, U1WIRE_TimerCb);
+    if (priv->busyWaitTimer == NULL) return E_OUT_OF_MEM;
+
     // some defaults
     priv->pin_number = 0;
     priv->port_name = 'A';
@@ -122,6 +131,9 @@ static void U1WIRE_deInit(Unit *unit)
     // Release all resources
     rsc_teardown(unit);
 
+    // Delete the software timer
+    assert_param(pdPASS == xTimerDelete(priv->busyWaitTimer, 1000));
+
     // Free memory
     free_ck(unit->data);
 }