dev #4
1
.gitignore
vendored
1
.gitignore
vendored
@ -1,2 +1 @@
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out/
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*.bin
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17
inc/mouse.h
17
inc/mouse.h
@ -1,17 +0,0 @@
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#ifndef MOUSE_H
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#define MOUSE_H
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#include "genesis.h"
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typedef struct {
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u8 valid; // =1 если мышь (сигнатура совпала)
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u8 buttons;
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s16 dx;
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s16 dy;
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u8 nibbles[10]; // для вывода RAW
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} MouseData;
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// Чтение мыши с порта
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void read_mouse(MouseData* dst, volatile u8* port);
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#endif
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Binary file not shown.
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Before Width: | Height: | Size: 194 B |
128
src/main.c
128
src/main.c
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#include "genesis.h"
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#include "mouse.h"
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#define PORT1 ((volatile u8*)0xA10003)
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#define PORT2 ((volatile u8*)0xA10005)
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#define MOUSE_PORT ((volatile u8*)0xA10003)
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#define Z80_HALT *((volatile u16*)0xA11100)
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#define MOUSE_DELAY 32
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static inline void delay(void) {
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__asm__ volatile (
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"move.w %0,%%d0\n\t"
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"1: subq.w #1,%%d0\n\t"
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"bne.s 1b"
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:
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: "i"(MOUSE_DELAY)
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: "d0"
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);
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}
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int main() {
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VDP_setTextPlane(0);
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VDP_drawText("Sega Mega Mouse RAW reader", 7, 27);
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VDP_setTextPlane(0);
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VDP_drawText("Sega Mega Mouse RAW reader", 7, 27);
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VDP_drawText("RAW nibbles:", 14,0);
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s16 x1=0,y1=0, x2=0,y2=0;
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u8 frame = 0;
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char buf[40]; //буфер строки для вывода на экран
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u8 nibbles[16] = {0};
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s16 x = 0;
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s16 y = 0;
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while(TRUE) {
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MouseData m1;
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read_mouse(&m1, PORT1);
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sprintf(buf, "+%X%X%X%X %X %X %X%X %X%X",
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m1.nibbles[0], m1.nibbles[1], m1.nibbles[2], m1.nibbles[3],
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m1.nibbles[4], m1.nibbles[5], m1.nibbles[6], m1.nibbles[7],
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m1.nibbles[8], m1.nibbles[9]);
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VDP_clearTextArea(1,2,1,20);
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VDP_drawText(buf, 1, 2 + frame%20);
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char buf[40]; //буфер строки для вывода на экран
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if(m1.valid) {
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x1 += m1.dx; y1 += m1.dy;
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if(x1>9999) x1=-9999; else if(x1<-9999) x1=9999;
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if(y1>9999) y1=-9999; else if(y1<-9999) y1=9999;
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while(TRUE) {
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sprintf(buf, "buttons: %c%c%c%c",
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((m1.buttons>>3)&1)+'0',
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((m1.buttons>>2)&1)+'0',
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((m1.buttons>>1)&1)+'0',
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((m1.buttons>>0)&1)+'0');
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VDP_drawText(buf, 2, 23);
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SYS_doVBlankProcess();
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VDP_clearTextArea(0, 1, 40, 13);
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sprintf(buf, "PORT1: dx:%+04d dy:%+04d x:%+05d y:%+05d", m1.dx,m1.dy,x1,y1);
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VDP_drawText(buf, 1, 24);
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} else {
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VDP_clearTextArea(2,23,13,1);
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sprintf(buf, "PORT1: Mouse not recognized");
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VDP_drawText(buf, 1, 24);
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}
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MouseData m2;
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read_mouse(&m2, PORT2);
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sprintf(buf, "%X%X%X%X %X %X %X%X %X%X+",
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m2.nibbles[0], m2.nibbles[1], m2.nibbles[2], m2.nibbles[3],
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m2.nibbles[4], m2.nibbles[5], m2.nibbles[6], m2.nibbles[7],
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m2.nibbles[8], m2.nibbles[9]);
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VDP_clearTextArea(38,2,1,20);
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VDP_drawText(buf, 24, 2 + frame%20);
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//опрос мыши
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Z80_HALT = 0x0100;
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*MOUSE_PORT = 0x60; delay();
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if(m2.valid) {
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x2 += m2.dx; y2 += m2.dy;
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if(x2>9999) x2=-9999; else if(x2<-9999) x2=9999;
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if(y2>9999) y2=-9999; else if(y2<-9999) y2=9999;
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nibbles[0] = *MOUSE_PORT & 0x0F;
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sprintf(buf, "buttons: %c%c%c%c",
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((m2.buttons>>3)&1)+'0',
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((m2.buttons>>2)&1)+'0',
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((m2.buttons>>1)&1)+'0',
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((m2.buttons>>0)&1)+'0');
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VDP_drawText(buf, 25, 23);
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sprintf(buf, "PORT2: dx:%+04d dy:%+04d x:%+05d y:%+05d", m2.dx,m2.dy,x2,y2);
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VDP_drawText(buf, 1, 25);
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} else {
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sprintf(buf, "PORT2: Mouse not recognized");
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VDP_clearTextArea(25,23,13,1);
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VDP_drawText(buf, 1, 25);
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}
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for(int i=1;i<10;i++) {
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*MOUSE_PORT = (i&1)?0x20:0x00;
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delay();
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nibbles[i] = *MOUSE_PORT & 0x0F;
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delay();
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}
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*MOUSE_PORT = 0x60; delay();
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Z80_HALT = 0x0000;
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//конец опроса мыши
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// выводим нибблы на экран
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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]);
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VDP_drawText(buf, 13,1);
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//считаем dx dy
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s16 dx = (nibbles[6] << 4) | nibbles[7];
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s16 dy = (nibbles[8] << 4) | nibbles[9];
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if (nibbles[4]&8) dy = 255;
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if (nibbles[4]&4) dx = 255;
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if (nibbles[4]&2) dy = dy|0xFF00; //sign-extend to 16-bit
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if (nibbles[4]&1) dx = dx|0xFF00;
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x+=dx;
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y+=dy;
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//выводим на экран полезные данные
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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');
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VDP_drawText(buf, 2, 10);
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sprintf(buf, "dx: %+04d dy: %+04d x: %+04d y: %+04d", dx,dy,x,y);
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VDP_drawText(buf, 2, 12);
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//счётчик кадров для вывода истории нибблов
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frame++;
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}
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//конец кадра
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VDP_waitVSync();
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}
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return 0;
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return 0;
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}
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47
src/mouse.c
47
src/mouse.c
@ -1,47 +0,0 @@
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#include "mouse.h"
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#define MOUSE_DELAY 16
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#define Z80_HALT *((volatile u16*)0xA11100)
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static inline void delay(void) {
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__asm__ volatile (
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"move.w %0,%%d0\n\t"
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"1: subq.w #1,%%d0\n\t"
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"bne.s 1b"
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:
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: "i"(MOUSE_DELAY)
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: "d0"
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);
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}
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void read_mouse(MouseData* dst, volatile u8* port) {
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dst->valid = 0;
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Z80_HALT = 0x0100;
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*port = 0x60; delay();
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dst->nibbles[0] = *port & 0x0F;
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for(int i=1; i<10; i++) {
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*port = (i&1) ? 0x20 : 0x00;
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delay();
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dst->nibbles[i] = *port & 0x0F;
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delay();
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}
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*port = 0x60; delay();
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Z80_HALT = 0x0000;
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// проверка сигнатуры 0BFF
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if (dst->nibbles[0]==0x0 && dst->nibbles[1]==0xB && dst->nibbles[2]==0xF && dst->nibbles[3]==0xF) {
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dst->valid = 1;
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dst->dx = (dst->nibbles[6] << 4) | dst->nibbles[7];
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dst->dy = (dst->nibbles[8] << 4) | dst->nibbles[9];
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if (dst->nibbles[4] & 8) dst->dy = 255;
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if (dst->nibbles[4] & 4) dst->dx = 255;
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if (dst->nibbles[4] & 2) dst->dy |= 0xFF00; // sign-extend
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if (dst->nibbles[4] & 1) dst->dx |= 0xFF00;
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dst->buttons = dst->nibbles[5];
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}
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}
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