Complete Example of Profiling A-3
Code A-3. EOnCE_stopwatch.c
/*
* Header file contains definitions of EOnCE memory-mapped register addresse s,
* and definition of the WRITE_IOREG() macro.
*/
#include "EOnCE_registers.h"
#include "EOnCE_stopwatch.h"
unsigned long CLOCK_SPEED = 300000000;
static volatile long EOnCE_stopwatch_timer_flag; /*Global dummby variable*/
void EOnCE_stopwatch_timer_init()
{WRITE_IOREG(EDCA1_REFA,(long)&EOnCE_stopwatch_timer_flag);
/* Address to snoop for on XABA */
WRITE_IOREG(EDCA1_REFB,(long)&EOnCE_stopwatch_timer_flag);
/* Address to snoop for on XABB */
WRITE_IOREG(EDCA1_MASK,MAX_32_BIT);
/* No masking is performed in address comparison */
WRITE_IOREG(EDCA1_CTRL,0x3f06);
/* Detect writes on both XABA and XABB */
}
void EOnCE_LED_init()
{*((long *)EE_CTRL) &= ~(3<<2); /* Toggle EE1 when event1 h appens */
}
void EOnCE_stopwatch_timer_start()
{
WRITE_IOREG(ECNT_VAL,MAX_32_BIT); /* Coun tdown wil l sta rt at (2* *32)- 1 */
WRITE_IOREG(ECNT_EXT,0); /* Ex tension will c ount up from z ero */
WRITE_IOREG(ECNT_CTRL,0x12c);
/* Counting will be triggered by detection on EDCA1 */
EOnCE_stopwatch_timer_flag = 0;
/* This write to the flag triggers the counter */
}
void EOnCE_stopwatch_timer_stop(unsigned long *clock_ext, unsigned long *cl ock_va l)
{
WRITE_IOREG(ECNT_CTRL,0); /* Disable event counter */
READ_IOREG(ECNT_VAL,*clock_val); /* Save ECNT_VAL in program variable */
READ_IOREG(ECNT_EXT,*clock_ext); /* Save ECNT_EXT in program variable */
*clock_val = (MAX_32_BIT-*clock_val); /* Adju st for c ountdown */
}
void EOnCE_LED_off()
{
EOnCE_stopwatch_timer_flag = 0; /* Cre ate an E DCA1 even t */
}
unsigned long Convert_clock2time(unsigned long clock_ext, unsigned long clock_ val, short option )
{
unsigned long result;
switch(option)
{
case EONCE_SECOND:
result= clock_ext*MAX_32_BIT/CLOCK_SPEED + clo ck_val/C LOCK_SPEE D;
break;
case EONCE_MILLISECOND:
result= clock_ext*MAX_32_BIT/(CLOCK_SPEED/1000 )
+ clock_val/(CLOCK_SPEED/1000);
break;
case EONCE_MICROSECOND:
result= clock_ext*MAX_32_BIT/(CLOCK_SPEED/1000 000)
+ clock_val/(CLOCK_SPEED/1000000);
break;
default: result=0; /* err or condi tion */
break;
}
return result;
}