Quantum Leaps
Dining Philosophers Problem (DPP) example for the QP active object framework. Demonstrates: event-driven programming, hierarchical state machines in C++, modeling and graphical state machine design, code generation, preemptive multitasking, software tracing, power saving mode, direct event posting, publish-subscribe. More information available in the [[/users/QL/notebook|Quantum Leaps Notebook pages]]. See also [[http://www.state-machine.com|state-machine.com]].
Diff: bsp.cpp
- Revision:
- 2:2e62e514f323
- Parent:
- 0:efb9ac8d1a88
- Child:
- 3:81ceb3127876
--- a/bsp.cpp Mon Feb 14 01:24:01 2011 +0000
+++ b/bsp.cpp Wed Feb 16 17:12:38 2011 +0000
@@ -1,7 +1,7 @@
//////////////////////////////////////////////////////////////////////////////
// Product: BSP for "Dining Philosophers Problem" example, QK kernel
// Last Updated for Version: 4.1.06
-// Date of the Last Update: Feb 10, 2011
+// Date of the Last Update: Feb 16, 2011
//
// Q u a n t u m L e a P s
// ---------------------------
@@ -131,7 +131,11 @@
void QK::onIdle(void) {
QF_INT_LOCK(dummy);
- LED_PORT->FIOSET = LED4_BIT; // turn the LED4 on
+ LED_PORT->FIOSET = LED4_BIT; // turn the LED4 on
+ __NOP(); // delay a bit to see some light intensity
+ __NOP();
+ __NOP();
+ __NOP();
LED_PORT->FIOCLR = LED4_BIT; // turn the LED4 off
QF_INT_UNLOCK(dummy);
@@ -145,9 +149,15 @@
}
}
#else
- // put the CPU and peripherals to the low-power mode
- // you might need to customize the clock management for your application,
- // see the datasheet for your particular Cortex-M3 MCU.
+ // Put the CPU and peripherals to the low-power mode. You might need to
+ // customize the clock management for your application, see the datasheet
+ // for your particular Cortex-M3 MCU.
+ //
+ // Specifially for the mbed board, see the articles:
+ // * "Power Management" http://mbed.org/cookbook/Power-Management; and
+ // * "Interface Powerdown" at
+ // http://mbed.org/users/simon/notebook/interface-powerdown/
+ //
__WFI();
#endif
}