Add and cleanup comments

[bertos.git] / drv / timer_dsp56k.h

diff --git a/drv/timer_dsp56k.h b/drv/timer_dsp56k.h
index 2b61e584a9c7d0856441c592e6236d6e5f6fa630..025b5a8e6b1ad002c47d54aa66b7efec3e5ffe18 100755 (executable)
--- a/drv/timer_dsp56k.h
+++ b/drv/timer_dsp56k.h
@@ -3,7 +3,7 @@
  * <!--
  * Copyright 2004 Giovanni Bajo
  * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
- * All Rights Reserved.
+ * This file is part of DevLib - See devlib/README for information.
  * -->
  *
  * \version $Id$
@@ -15,6 +15,12 @@
 
 /*
  * $Log$
+ * Revision 1.3  2004/06/06 18:30:34  bernie
+ * Import DSP56800 changes from SC.
+ *
+ * Revision 1.2  2004/06/03 11:27:09  bernie
+ * Add dual-license information.
+ *
  * Revision 1.1  2004/05/23 18:23:30  bernie
  * Import drv/timer module.
  *
@@ -25,14 +31,13 @@
 
 #include <DSP56F807.h>
 #include <compiler.h>
+#include <hw.h>
 
-//! The system timer for events is currently TMRA0. We prefer A/B over C/D because
-//  A/B share the pin with the quadrature decoder module, and we do not need
-//  pins for our system timer.
-//  If you want to change this setting, you need also to modify the IRQ vector table.
-#define REG_SYSTEM_TIMER          (REG_TIMER_A + 0)
-#define SYSTEM_TIMER_IRQ_VECTOR   42   /* TMRA0 */
+// Calculate register pointer and irq vector from hw.h setting
+#define REG_SYSTEM_TIMER          PP_CAT(REG_TIMER_, SYSTEM_TIMER)
+#define SYSTEM_TIMER_IRQ_VECTOR   PP_CAT(IRQ_TIMER_, SYSTEM_TIMER)
 
+//! Prescaler for the system timer
 #define TIMER_PRESCALER           16
 
 //! Frequency of the hardware high precision timer
@@ -65,8 +70,6 @@ static void timer_hw_init(void)
 
        // Small preprocessor trick to generate the REG_TIMER_CTRL_PRIMARY_IPBYNN macro
        //  needed to set the prescaler
-       #define PP_CAT2(x,y)                      x ## y
-       #define PP_CAT(x,y)                       PP_CAT2(x,y)
        #define REG_CONTROL_PRESCALER             PP_CAT(REG_TIMER_CTRL_PRIMARY_IPBY, TIMER_PRESCALER)
 
        // Setup the counter and start counting