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#include <stdio.h>
#include <psxgpu.h>
#include <psxapi.h>
#include <psxetc.h>
/* OT and Packet Buffer sizes */
#define OT_LEN 256
#define PACKET_LEN 1024
/* Screen resolution */
#define SCREEN_XRES 320
#define SCREEN_YRES 240
/* Screen center position */
#define CENTERX SCREEN_XRES>>1
#define CENTERY SCREEN_YRES>>1
/* Double buffer structure */
typedef struct {
DISPENV disp; /* Display environment */
DRAWENV draw; /* Drawing environment */
} DB;
/* Double buffer variables */
DB db[2];
int db_active = 0;
/* Function declarations */
void init();
void display();
volatile int timer_calls = 0;
volatile short *timer2_ctrl = (short*)0x1F801124;
void timer_func()
{
timer_calls++;
}
volatile int vsync_count = 0;
volatile int tick_count = 0;
volatile int tick_value = 0;
void vsync_func()
{
vsync_count++;
if( vsync_count > 60 )
{
tick_value = timer_calls-tick_count;
tick_count = timer_calls;
vsync_count = 0;
}
}
/* Main function */
int main() {
int counter;
/* Init graphics and GTE */
init();
EnterCriticalSection();
//SetRCnt(RCntCNT2, 0xF040, RCntMdINTR);
// NTSC clock base
counter = 4304000/560;
// PAL clock base
//counter = 5163000/560;
SetRCnt(RCntCNT2, counter, RCntMdINTR);
*timer2_ctrl = 0x1E58;
InterruptCallback(6, timer_func);
StartRCnt(RCntCNT2);
ChangeClearRCnt(2, 0);
ExitCriticalSection();
VSyncCallback(vsync_func);
/* Main loop */
while( 1 ) {
FntPrint(-1, "TIMER COUNT=%d\n", timer_calls);
FntPrint(-1, "TICKS/SEC=%d\n", tick_value);
/* Swap buffers and draw text */
display();
}
return 0;
}
void init() {
/* Reset the GPU, also installs a VSync event handler */
ResetGraph( 0 );
//SetVideoMode(MODE_PAL);
/* Set display and draw environment areas */
/* (display and draw areas must be separate, otherwise hello flicker) */
SetDefDispEnv( &db[0].disp, 0, 0, SCREEN_XRES, SCREEN_YRES );
SetDefDrawEnv( &db[0].draw, SCREEN_XRES, 0, SCREEN_XRES, SCREEN_YRES );
/* Enable draw area clear and dither processing */
setRGB0( &db[0].draw, 63, 0, 127 );
db[0].draw.isbg = 1;
db[0].draw.dtd = 1;
/* Define the second set of display/draw environments */
SetDefDispEnv( &db[1].disp, SCREEN_XRES, 0, SCREEN_XRES, SCREEN_YRES );
SetDefDrawEnv( &db[1].draw, 0, 0, SCREEN_XRES, SCREEN_YRES );
//db[0].disp.screen.y = 24;
//db[1].disp.screen.y = 24;
setRGB0( &db[1].draw, 63, 0, 127 );
db[1].draw.isbg = 1;
db[1].draw.dtd = 1;
/* Apply the drawing environment of the first double buffer */
PutDrawEnv( &db[0].draw );
FntLoad(960, 0);
FntOpen(0, 8, 320, 216, 0, 100);
}
void display() {
FntFlush(-1);
/* Wait for GPU to finish drawing and vertical retrace */
DrawSync( 0 );
VSync( 0 );
/* Swap buffers */
db_active ^= 1;
/* Apply display/drawing environments */
PutDrawEnv( &db[db_active].draw );
PutDispEnv( &db[db_active].disp );
/* Enable display */
SetDispMask( 1 );
}
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