Embedded Real-Time System Programming
Lab Exorcise 3:
1) Run the NetBurner Mod5282 Interrupts Application Note’s example program that services interrupts from
the IRQ switch. See below.
2) Write a program that uses the IRQ switch in unique application of your choice. For example, you might
use the LED’s to simulate a game with a ball moving, do something with the displays, or do something that
includes the A/D converter you are now familiar with. Use some assembly language in your program,
perhaps in the service routine. Show your creativity.
NetBurner Mod5282 Interrupts Application Note’s example program:
#include "predef.h"
#include <stdio.h>
#include <ctype.h>
#include <startnet.h>
#include <autoupdate.h>
#include <dhcpclient.h>
#include <../mod5282/system/sim5282.h>
#include <cfinter.h>
/* An interrupt setup helper defined in bsp.c */
extern "C"
{
/* This function sets up the 5282 interrupt controller */
void SetIntc(int intc,long func, int vector, int level,int prio );
}
/* We are going to use a Semaphore to communicate between the IRQ1 pin ISR and the main
application */
OS_SEM IrqPostSem;
/* Declare our interrupt procedure....
name: our_irq1_pin_isr
masking level (The value of the ColdFire SR during the interrupt:
use 0x2700 to mask all interrupts.
0x2500 to mask levels 1-5 etc...
0x2100 to mask level 1 */
INTERRUPT(out_irq1_pin_isr, 0x2100 )
{
/* WARNING WARNING WARNING
Only a very limited set of RTOS functions can be called from within an interrupt service
routine.
Basically, only OS POST functions and LED functions should be used
No I/O (read, write or printf may be called), since they can block. */
sim.eport.epfr=0x02; /* Clear the interrupt edge 0 0 0 0 0 0 1 0 */
OSSemPost(&IrqPostSem);
}
extern "C"
{
void UserMain(void * pd);
void putdisp(unsigned short w);
}
/* Helper function to display a decimal number */
void PutDispDecimal(WORD val, BOOL blank_zero )
{
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