- software timer is event based

- completed main functions



git-svn-id: http://moon:8086/svn/projects/HendiControl@31 fda53097-d464-4ada-af97-ba876c37ca34

Control/firmware/uart_echo/timer.c

@@ -6,16 +6,54 @@
  */ 
 
 #include <avr/io.h>
+#include <avr/interrupt.h>
 #include "timer.h"
+#include "message.h"
 
-void timer_init(uint16_t TIMER_RELOAD, TimerClockSel clockSel)
+static uint16_t timer_reload = 0;
+static Timer_t user_timer[16];
+static Fifo *g_pFifo = NULL;
+
+ISR (TIMER1_OVF_vect)    // Timer1 ISR
 {
-	
+	TCNT1 = timer_reload;
+
+	for (int i=0; i < 16; i++)
+	{
+		if (user_timer[i].isRunning)
+		{
+			if (user_timer[i].count > 0)
+			{
+				user_timer[i].count--;
+			}
+			else
+			{
+				Msg_t msg = {Timer, i};
+				if (fifo_push(g_pFifo, &msg))
+				{
+					user_timer[i].isRunning = 0;
+				}
+			}
+		}
+	}
+}
+
+void timer_init(Fifo *pFifo, uint16_t TIMER_RELOAD, TimerClockSel clockSel)
+{
+	g_pFifo = pFifo;
+	timer_reload = TIMER_RELOAD;
 	TCNT1 = TIMER_RELOAD;
 
 	TCCR1A = 0x00;
 	TCCR1B = (TCCR1B & TimerClockSel_mask) | clockSel;
 	TIMSK1 = (1 << TOIE1) ; // Enable timer1 overflow interrupt(TOIE1)
-	
+}
+
+void timer_start(TimerId timerId, uint16_t count)
+{
+	cli();
+	user_timer[timerId].count = count;
+	user_timer[timerId].isRunning = 1;
+	sei();
 }