DIvan2000/SegaMouseRAW
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refactoring

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DIvan2000 2025-09-23 03:03:14 +04:00
parent b0789a7bc8
commit e51a86a726
4 changed files with 127 additions and 57 deletions
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1
.gitignore vendored
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out/ out/
*.bin

17
inc/mouse.h Normal file
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#ifndef MOUSE_H
#define MOUSE_H
#include "genesis.h"
typedef struct {
u8 valid; // =1 если мышь (сигнатура совпала)
u8 buttons;
s16 dx;
s16 dy;
u8 nibbles[10]; // для вывода RAW
} MouseData;
// Чтение мыши с порта
MouseData read_mouse(volatile u8* port);
#endif

104
src/main.c
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#include "genesis.h" #include "genesis.h"
#include "mouse.h"
#define MOUSE_PORT ((volatile u8*)0xA10003) #define PORT1 ((volatile u8*)0xA10003)
#define Z80_HALT *((volatile u16*)0xA11100) #define PORT2 ((volatile u8*)0xA10005)
#define MOUSE_DELAY 16
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() { int main() {
VDP_setTextPlane(0); VDP_setTextPlane(0);
VDP_drawText("Sega Mega Mouse RAW reader", 7, 27); VDP_drawText("Sega Mega Mouse RAW reader", 7, 27);
VDP_drawText("RAW nibbles:", 14,0); VDP_drawText("RAW nibbles:", 14,0);
u8 nibbles[16] = {0};
s16 x = 0;
s16 y = 0;
s16 x1=0,y1=0, x2=0,y2=0;
u8 frame = 0; u8 frame = 0;
char buf[40]; //буфер строки для вывода на экран char buf[40]; //буфер строки для вывода на экран
while(TRUE) { while(TRUE) {
//опрос мыши MouseData m1 = read_mouse(PORT1);
Z80_HALT = 0x0100; sprintf(buf, "+%X%X%X%X %X %X %X%X %X%X",
*MOUSE_PORT = 0x60; delay(); m1.nibbles[0], m1.nibbles[1], m1.nibbles[2], m1.nibbles[3],
m1.nibbles[4], m1.nibbles[5], m1.nibbles[6], m1.nibbles[7],
m1.nibbles[8], m1.nibbles[9]);
VDP_clearTextArea(1,2,1,20);
VDP_drawText(buf, 1, 2 + frame%20);
nibbles[0] = *MOUSE_PORT & 0x0F; if(m1.valid) {
x1 += m1.dx; y1 += m1.dy;
if(x1>9999) x1=-9999; else if(x1<-9999) x1=9999;
if(y1>9999) y1=-9999; else if(y1<-9999) y1=9999;
sprintf(buf, "buttons: %c%c%c%c",
((m1.buttons>>3)&1)+'0',
((m1.buttons>>2)&1)+'0',
((m1.buttons>>1)&1)+'0',
((m1.buttons>>0)&1)+'0');
VDP_drawText(buf, 2, 23);
for(int i=1;i<10;i++) { sprintf(buf, "PORT1: dx:%+04d dy:%+04d x:%+05d y:%+05d", m1.dx,m1.dy,x1,y1);
*MOUSE_PORT = (i&1)?0x20:0x00; VDP_drawText(buf, 1, 24);
delay(); } else {
nibbles[i] = *MOUSE_PORT & 0x0F; VDP_clearTextArea(2,23,13,1);
delay(); sprintf(buf, "PORT1: Mouse not recognized");
VDP_drawText(buf, 1, 24);
} }
*MOUSE_PORT = 0x60; delay(); MouseData m2 = read_mouse(PORT2);
Z80_HALT = 0x0000; sprintf(buf, "%X%X%X%X %X %X %X%X %X%X+",
//конец опроса мыши m2.nibbles[0], m2.nibbles[1], m2.nibbles[2], m2.nibbles[3],
m2.nibbles[4], m2.nibbles[5], m2.nibbles[6], m2.nibbles[7],
m2.nibbles[8], m2.nibbles[9]);
VDP_clearTextArea(38,2,1,20);
VDP_drawText(buf, 24, 2 + frame%20);
//выводим нибблы на экран if(m2.valid) {
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]); x2 += m2.dx; y2 += m2.dy;
VDP_clearTextArea(12,1,1,22); if(x2>9999) x2=-9999; else if(x2<-9999) x2=9999;
VDP_drawText(buf, 12,1+frame%22); if(y2>9999) y2=-9999; else if(y2<-9999) y2=9999;
//считаем dx dy sprintf(buf, "buttons: %c%c%c%c",
s16 dx = (nibbles[6] << 4) | nibbles[7]; ((m2.buttons>>3)&1)+'0',
s16 dy = (nibbles[8] << 4) | nibbles[9]; ((m2.buttons>>2)&1)+'0',
if (nibbles[4]&8) dy = 255; ((m2.buttons>>1)&1)+'0',
if (nibbles[4]&4) dx = 255; ((m2.buttons>>0)&1)+'0');
if (nibbles[4]&2) dy = dy|0xFF00; //sign-extend to 16-bit VDP_drawText(buf, 25, 23);
if (nibbles[4]&1) dx = dx|0xFF00;
x+=dx;
y+=dy;
//ограничиваем x и y sprintf(buf, "PORT2: dx:%+04d dy:%+04d x:%+05d y:%+05d", m2.dx,m2.dy,x2,y2);
x = (x > 9999) ? -9999 : (x < -9999 ? 9999 : x); VDP_drawText(buf, 1, 25);
y = (y > 9999) ? -9999 : (y < -9999 ? 9999 : y); } else {
sprintf(buf, "PORT2: Mouse not recognized");
//выводим на экран полезные данные VDP_clearTextArea(25,23,13,1);
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, 1, 25);
VDP_drawText(buf, 2, 24); }
sprintf(buf, "dx: %+04d dy: %+04d x: %+05d y: %+05d", dx,dy,x,y);
VDP_drawText(buf, 2, 25);
//счётчик кадров для вывода истории нибблов //счётчик кадров для вывода истории нибблов
frame++; frame++;

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src/mouse.c Normal file
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#include "mouse.h"
#define MOUSE_DELAY 16
#define Z80_HALT *((volatile u16*)0xA11100)
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"
);
}
MouseData read_mouse(volatile u8* port) {
u8 nibbles[16];
MouseData md = {0};
Z80_HALT = 0x0100;
*port = 0x60; delay();
nibbles[0] = *port & 0x0F;
for(int i=1; i<10; i++) {
*port = (i&1) ? 0x20 : 0x00;
delay();
nibbles[i] = *port & 0x0F;
delay();
}
*port = 0x60; delay();
Z80_HALT = 0x0000;
// копируем нибблы для вывода RAW
for(int i=0;i<10;i++) md.nibbles[i] = nibbles[i];
// проверка сигнатуры 0BFF
if (nibbles[0]==0x0 && nibbles[1]==0xB && nibbles[2]==0xF && nibbles[3]==0xF) {
md.valid = 1;
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 |= 0xFF00; // sign-extend
if (nibbles[4] & 1) dx |= 0xFF00;
md.dx = dx;
md.dy = dy;
md.buttons = nibbles[5];
}
return md;
}