rpi4-osdev/part12-wgt/samples/wgt15.c
2021-04-07 19:48:53 +01:00

83 lines
1.7 KiB
C

#include "include/wgt.h"
#include "include/mem.h"
#include "include/multicore.h"
// ######## REQUIRED FUNCTIONS ########
unsigned long state0 = 1000;
unsigned long state1 = 2000;
unsigned long rand(void)
{
unsigned long s1 = state0;
unsigned long s0 = state1;
state0 = s0;
s1 ^= s1 << 23;
s1 ^= s1 >> 17;
s1 ^= s0;
s1 ^= s0 >> 26;
state1 = s1;
return state0 + state1;
}
// ######## STUB FUNCTIONS ########
unsigned int kb = 0;
unsigned int kbhit(void) {
kb++;
return kb / 500;
}
void getch(void) {
wait_msec(0x500000);
kb = 0;
}
// ######## WGT EXAMPLES ########
void wgt15()
{
short y;
block screen1;
set_clock_rate(get_max_clock());
mem_init();
vga256 (); /* Initializes WGT system */
start_core2(minit); // Start the comms engine (core 2)
while (!comms_up); // Wait for comms up
screen1 = wnewblock (0, 0, 119, 129);
/* Virtual screens can now be any size, as long as they fit within one
segment (64k) */
wtextcolor (vgapal[15]);
wouttextxy (0, 0, NULL, "Click the mouse button in a few seconds");
wsetscreen (screen1); /* sets to screen1 */
for (y = 0; y < 200; y++)
{
wsetcolor (vgapal[y]);
wline (0, 0, 319, y); /* draw something on another screen */
wline (319, 199, 0, y);
}
while (!but); // wait for a mouse press
/* now use putblock to show what happened on the other screen */
wnormscreen (); /* make the putblock go onto the default screen */
wputblock (0, 10, screen1, 0);
wfreeblock (screen1);
/* remember to free that memory (64004 bytes for a screen) */
}
void main()
{
wgt15();
while (1);
}