DIvan2000/SegaMouseRAW
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Merge pull request 'dev' (#1) from dev into main

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Reviewed-on: #1
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DIvan2000 2025-09-22 20:35:12 +04:00
commit 4b5ae0e516
1 changed files with 37 additions and 28 deletions
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65
src/main.c
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@ -5,34 +5,43 @@
#define MOUSE_DELAY 32
static inline void delay() {
for(int i=0;i<MOUSE_DELAY;i++) asm volatile("nop");
static inline void delay(void) {
__asm__ volatile (
"move.w %0,%%d0\n\t"
"1: subq.w #1,%%d0\n\t"
"bne.s 1b"
:
: "i"(MOUSE_DELAY)
: "d0"
);
}
int main() {
VDP_setTextPlane(0);
VDP_drawText("Sega Mega Mouse RAW reader", 2, 16);
VDP_drawText("Sega Mega Mouse RAW reader", 7, 27);
VDP_drawText("RAW nibbles:", 14,0);
u8 nibbles[16] = {0};
s16 x = 0;
s16 y = 0;
u8 nibbles[16];
int x = 0;
int y = 0;
char buf[40]; //буфер строки для вывода на экран
while(TRUE) {
SYS_doVBlankProcess();
VDP_clearTextArea(0, 0, 40, 13);
// считываем нибблы напрямую
VDP_clearTextArea(0, 1, 40, 13);
//опрос мыши
Z80_HALT = 0x0100;
*MOUSE_PORT = 0x60; delay();
*MOUSE_PORT = 0x60; delay();
nibbles[0] = *MOUSE_PORT & 0x0F;
for(int i=1;i<10;i++) {
*MOUSE_PORT = (i&1)?0x00:0x20;
*MOUSE_PORT = (i&1)?0x20:0x00;
delay();
nibbles[i] = *MOUSE_PORT & 0x0F;
delay();
@ -40,29 +49,29 @@ int main() {
*MOUSE_PORT = 0x60; delay();
Z80_HALT = 0x0000;
//конец опроса мыши
// выводим нибблы на экран
char buf[64];
int dx = (nibbles[6] << 4) | nibbles[7];
int dy = (nibbles[8] << 4) | nibbles[9];
if (nibbles[3]&8) dy = 255;
if (nibbles[3]&4) dx = 255;
if (nibbles[3]&2) dy = -dy;
if (nibbles[3]&1) dx = -dx;
sprintf(buf, "%X%X%X%X %X %X %X%X %X%X", nibbles[0],nibbles[1],nibbles[2],nibbles[3],nibbles[4],nibbles[5],nibbles[6],nibbles[7],nibbles[8],nibbles[9]);
VDP_drawText(buf, 13,1);
//считаем dx dy
s16 dx = (nibbles[6] << 4) | nibbles[7];
s16 dy = (nibbles[8] << 4) | nibbles[9];
if (nibbles[4]&8) dy = 255;
if (nibbles[4]&4) dx = 255;
if (nibbles[4]&2) dy = dy|0xFF00; //sign-extend to 16-bit
if (nibbles[4]&1) dx = dx|0xFF00;
x+=dx;
y+=dy;
sprintf(buf, "dx: %+04d dy: %+04d x: %+04d y: %+04d", dx,dy,x/64,y/64);
VDP_drawText(buf, 2, 12);
sprintf(buf, "buttons: %c%c%c%c", (nibbles[4]&8&&1)+'0',(nibbles[4]&4&&1)+'0',(nibbles[4]&2&&1)+'0',(nibbles[4]&1&&1)+'0');
//выводим на экран полезные данные
sprintf(buf, "buttons: %c%c%c%c", (nibbles[5]&8&&1)+'0',(nibbles[5]&4&&1)+'0',(nibbles[5]&2&&1)+'0',(nibbles[5]&1&&1)+'0');
VDP_drawText(buf, 2, 10);
sprintf(buf, "dx: %+04d dy: %+04d x: %+04d y: %+04d", dx,dy,x,y);
VDP_drawText(buf, 2, 12);
}
return 0;
}