Force events into the future

Author: mjrgh

targets/TARGET_Freescale/TARGET_KLXX/us_ticker.c

@@ -185,13 +185,14 @@ static void lptmr_isr(void) {
 }
 
 void us_ticker_set_interrupt(timestamp_t timestamp) {
-    int delta = (int)((uint32_t)timestamp - us_ticker_read());
+    uint32_t tcur = us_ticker_read();
+    int delta = (int)((uint32_t)timestamp - tcur);
     if (delta <= 0) {
-        // This event was in the past:
-        us_ticker_irq_handler();
-        return;
-    }
-    
+        // This event was in the past.  Force it into the very near
+	// future instead.
+	timestamp = tcur + 2;
+    } 
+	
     us_ticker_int_counter   = (uint32_t)(delta >> 16);
     us_ticker_int_remainder = (uint16_t)(0xFFFF & delta);
     if (us_ticker_int_counter > 0) {