From: John Tsiombikas Date: Sat, 13 Mar 2021 01:28:21 +0000 (+0200) Subject: initial commit X-Git-Tag: v1.0~13 X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=gba_blender;a=commitdiff_plain;h=ca3123df6cd875b1361533020c1f4eebfe9da295 initial commit --- ca3123df6cd875b1361533020c1f4eebfe9da295 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..100346d --- /dev/null +++ b/.gitignore @@ -0,0 +1,9 @@ +*.o +*.d +*.swp +*.elf +*.gba +*.png +*.raw +*.pal +pngdump diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..88f8d0e --- /dev/null +++ b/Makefile @@ -0,0 +1,72 @@ +src = $(wildcard src/*.c) +ssrc = $(wildcard src/*.s) +#dataobj = data/data.o +obj = $(src:.c=.o) $(ssrc:.s=.o) $(dataobj) +dep = $(src:.c=.d) +name = blender +elf = $(name).elf +bin = $(name).gba + +ARCH = arm-none-eabi- + +CPP = $(ARCH)cpp +CC = $(ARCH)gcc +AS = $(ARCH)as +OBJCOPY = $(ARCH)objcopy +EMU = vbam + +opt = -O1 -fomit-frame-pointer -mcpu=arm7tdmi -mtune=arm7tdmi -mthumb -mthumb-interwork +#dbg = -g + +CFLAGS = $(opt) $(dbg) -pedantic -Wall -MMD +ASFLAGS = -mthumb-interwork +LDFLAGS = -mthumb -mthumb-interwork -Wl,-print-gc-sections +EMUFLAGS = -T 100 -f 1 --agb-print + + +.PHONY: all +all: $(bin) $(bin_mb) + +$(bin): $(elf) + $(OBJCOPY) -O binary $(elf) $(bin) + gbafix $(bin) + +$(elf): $(obj) + $(CC) -o $(elf) $(obj) -specs=gba.specs $(LDFLAGS) + +-include $(dep) + +src/data.o: src/data.s data/bg.raw data/bg.pal + +tools/pngdump/pngdump: + $(MAKE) -C tools/pngdump + +%.raw: %.png tools/pngdump/pngdump + tools/pngdump/pngdump -o $@ $< + +%.pal: %.png tools/pngdump/pngdump + tools/pngdump/pngdump -o $@ -c $< + +.PHONY: clean +clean: + rm -f $(obj) $(bin) $(bin_mb) $(elf) $(elf_mb) + +.PHONY: cleandep +cleandep: + rm -f $(dep) + +.PHONY: install +install: $(bin) + if2a -n -f -W $< + +.PHONY: run +run: $(bin_mb) + if2a -m $< + +.PHONY: simrun +simrun: $(bin) + $(EMU) $(EMUFLAGS) $(bin) + +.PHONY: disasm +disasm: $(elf) + $(ARCH)objdump -d $< >$@ diff --git a/src/data.s b/src/data.s new file mode 100644 index 0000000..b178889 --- /dev/null +++ b/src/data.s @@ -0,0 +1,9 @@ + .section .rodata + + .globl bgimg_pixels + .globl bgimg_cmap + +bgimg_pixels: + .incbin "data/bg.raw" +bgimg_cmap: + .incbin "data/bg.pal" diff --git a/src/gbaregs.h b/src/gbaregs.h new file mode 100644 index 0000000..96f024a --- /dev/null +++ b/src/gbaregs.h @@ -0,0 +1,330 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#ifndef GBAREGS_H_ +#define GBAREGS_H_ + +#include + +#define VRAM_START_ADDR 0x6000000 +#define VRAM_BG_ADDR VRAM_START_ADDR +#define VRAM_OBJ_ADDR 0x6010000 +#define VRAM_LFB_OBJ_ADDR 0x6014000 +#define VRAM_LFB_FB0_ADDR VRAM_START_ADDR +#define VRAM_LFB_FB1_ADDR 0x600a000 + +/* address of character data block x (4 possible blocks, 16k each) */ +#define VRAM_CHR_BLOCK_ADDR(x) (VRAM_START_ADDR + ((x) << 14)) +/* address of screen data block x (32 possible blocks, 2k each) */ +#define VRAM_SCR_BLOCK_ADDR(x) (VRAM_START_ADDR + ((x) << 11)) + +/* fields of a background tile in screen memory */ +#define BGTILE_HFLIP 0x0400 +#define BGTILE_VFLIP 0x0800 +#define BGTILE_PAL(x) ((uint16_t)(x) << 12) + +/* color palette ram addresses for backgrounds and sprites */ +#define CRAM_BG_ADDR 0x5000000 +#define CRAM_OBJ_ADDR 0x5000200 + +/* interrupt handler */ +#define INTR_VECTOR (*(volatile uint32_t*)0x3007ffc) + +/* battery backed RAM address */ +#define SRAM_ADDR 0xe000000 + +/* I/O space */ + +#define REG_BASE 0x4000000 +#define REG8(x) (*(volatile uint8_t*)(REG_BASE + (x))) +#define REG16(x) (*(volatile uint16_t*)(REG_BASE + (x))) +#define REG32(x) (*(volatile uint32_t*)(REG_BASE + (x))) + +/* ---- display registers ---- */ +#define REG_DISPCNT REG16(0x00) +#define REG_GREENSWAP REG16(0x02) +#define REG_DISPSTAT REG16(0x04) +#define REG_VCOUNT REG16(0x06) +#define REG_BG0CNT REG16(0x08) +#define REG_BG1CNT REG16(0x0a) +#define REG_BG2CNT REG16(0x0c) +#define REG_BG3CNT REG16(0x0e) +/* scrolling registers */ +#define REG_BG0HOFS REG16(0x10) +#define REG_BG0VOFS REG16(0x12) +#define REG_BG1HOFS REG16(0x14) +#define REG_BG1VOFS REG16(0x16) +#define REG_BG2HOFS REG16(0x18) +#define REG_BG2VOFS REG16(0x1a) +#define REG_BG3HOFS REG16(0x1c) +#define REG_BG3VOFS REG16(0x1e) +/* BG rotation and scaling registers */ +#define REG_BG2PA REG16(0x20) +#define REG_BG2PB REG16(0x22) +#define REG_BG2PC REG16(0x24) +#define REG_BG2PD REG16(0x26) +#define REG_BG2X REG32(0x28) +#define REG_BG2Y REG32(0x2c) +#define REG_BG3PA REG16(0x30) +#define REG_BG3PB REG16(0x32) +#define REG_BG3PC REG16(0x34) +#define REG_BG3PD REG16(0x36) +#define REG_BG3X REG32(0x38) +#define REG_BG3Y REG32(0x3c) +/* window registers */ +#define REG_WIN0H REG16(0x40) +#define REG_WIN1H REG16(0x42) +#define REG_WIN0V REG16(0x44) +#define REG_WIN1V REG16(0x46) +#define REG_WININ REG16(0x48) +#define REG_WINOUT REG16(0x4a) + +#define REG_MOSAIC REG16(0x4c) +/* color effects */ +#define REG_BLDCNT REG16(0x50) +#define REG_BLDALPHA REG16(0x52) +#define REG_BLDY REG16(0x54) + +/* ---- sound registers ---- */ +#define REG_SOUND1CNT_L REG16(0x60) +#define REG_SOUND1CNT_H REG16(0x62) +#define REG_SOUND1CNT_X REG16(0x64) +#define REG_SOUND2CNT_L REG16(0x68) +#define REG_SOUND2CNT_H REG16(0x6c) +#define REG_SOUND3CNT_L REG16(0x70) +#define REG_SOUND3CNT_H REG16(0x72) +#define REG_SOUND3CNT_X REG16(0x74) +#define REG_SOUND4CNT_L REG16(0x78) +#define REG_SOUND4CNT_H REG16(0x7c) +#define REG_SOUNDCNT_L REG16(0x80) +#define REG_SOUNDCNT_H REG16(0x82) +#define REG_SOUNDCNT_X REG16(0x84) +#define REG_SOUNDBIAS REG16(0x88) +#define WAVE_RAM_PTR ((unsigned char*)(REG_BASE + 0x90)) +#define REG_FIFO_A REG32(0xa0) +#define REG_FIFO_B REG32(0xa4) +#define FIFO_A_PTR ((unsigned char*)(REG_BASE + 0xa0)) +#define FIFO_B_PTR ((unsigned char*)(REG_BASE + 0xa4)) + +/* ---- DMA registers ---- */ +#define REG_DMA0SAD REG32(0xb0) +#define REG_DMA0DAD REG32(0xb4) +#define REG_DMA0CNT_L REG16(0xb8) +#define REG_DMA0CNT_H REG16(0xba) +#define REG_DMA1SAD REG32(0xbc) +#define REG_DMA1DAD REG32(0xc0) +#define REG_DMA1CNT_L REG16(0xc4) +#define REG_DMA1CNT_H REG16(0xc6) +#define REG_DMA2SAD REG32(0xc8) +#define REG_DMA2DAD REG32(0xcc) +#define REG_DMA2CNT_L REG16(0xd0) +#define REG_DMA2CNT_H REG16(0xd2) +#define REG_DMA3SAD REG32(0xd4) +#define REG_DMA3DAD REG32(0xd8) +#define REG_DMA3CNT_L REG16(0xdc) +#define REG_DMA3CNT_H REG16(0xde) + +/* ---- timer registers ---- */ +#define REG_TM0CNT_L REG16(0x100) +#define REG_TM0CNT_H REG16(0x102) +#define REG_TM1CNT_L REG16(0x104) +#define REG_TM1CNT_H REG16(0x106) +#define REG_TM2CNT_L REG16(0x108) +#define REG_TM2CNT_H REG16(0x10a) +#define REG_TM3CNT_L REG16(0x10c) +#define REG_TM3CNT_H REG16(0x10e) + +#define REG_TMCNT_L(x) REG16(0x100 + ((x) << 2)) +#define REG_TMCNT_H(x) REG16(0x102 + ((x) << 2)) + +/* ---- communication registers (serial/joybus/gpio) ---- */ +#define REG_SIODATA32 REG32(0x120) +#define REG_SIOMULTI0 REG16(0x120) +#define REG_SIOMULTI1 REG16(0x122) +#define REG_SIOMULTI2 REG16(0x124) +#define REG_SIOMULTI3 REG16(0x126) +#define REG_SIOCNT REG16(0x128) +#define REG_SIOMLT_SEND REG16(0x12a) +#define REG_SIODATA8 REG16(0x12a) +#define REG_RCNT REG16(0x134) +#define REG_JOYCNT REG16(0x140) +#define REG_JOY_RECV REG32(0x150) +#define REG_JOY_TRANS REG32(0x154) +#define REG_JOYSTAT REG16(0x158) + +/* ---- keypad registers ---- */ +#define REG_KEYINPUT REG16(0x130) +#define REG_KEYCNT REG16(0x132) + +/* ---- interrupts ---- */ +#define REG_IE REG16(0x200) +#define REG_IF REG16(0x202) +#define REG_WAITCNT REG16(0x204) +#define REG_IME REG16(0x208) + +#define REG_POSTFLG REG8(0x300) +#define REG_HALTCNT REG8(0x301) +#define REG_INTMEMCNT REG32(0x800) + +/* REG_DISPSTAT bits */ +#define DISPSTAT_VBLANK 0x01 +#define DISPSTAT_HBLANK 0x02 +#define DISPSTAT_VMATCH 0x04 +#define DISPSTAT_IEN_VBLANK 0x08 +#define DISPSTAT_IEN_HBLANK 0x10 +#define DISPSTAT_IEN_VMATCH 0x20 +#define DISPSTAT_VCOUNT(x) ((uint16_t)(x) << 8) + +/* REG_DISPCNT bits */ +#define DISPCNT_MODE(x) (x) +#define DISPCNT_FB1 0x0010 +#define DISPCNT_HBLANK_OBJPROC 0x0020 +#define DISPCNT_OBJMAP_1D 0x0040 +#define DISPCNT_FORCE_BLANK 0x0080 +#define DISPCNT_BG0 0x0100 +#define DISPCNT_BG1 0x0200 +#define DISPCNT_BG2 0x0400 +#define DISPCNT_BG3 0x0800 +#define DISPCNT_OBJ 0x1000 +#define DISPCNT_WIN0 0x2000 +#define DISPCNT_WIN1 0x4000 +#define DISPCNT_WINOBJ 0x8000 + +/* REG_BGXCNT bits */ +#define BGCNT_PRIO(x) ((uint16_t)(x)) +#define BGCNT_CHR_BASE(x) ((uint16_t)(x) << 2) +#define BGCNT_MOSAIC 0x0040 +#define BGCNT_256COL 0x0080 +#define BGCNT_SCR_BASE(x) ((uint16_t)(x) << 8) +#define BGCNT_WRAP 0x2000 + +#define BGCNT_SZ(x) ((uint16_t)(x) << 14) +#define BGCNT_SZ_TX_256X256 BGCNT_SZ(0) +#define BGCNT_SZ_RS_128X128 BGCNT_SZ(0) +#define BGCNT_SZ_TX_512X256 BGCNT_SZ(1) +#define BGCNT_SZ_RS_256X256 BGCNT_SZ(1) +#define BGCNT_SZ_TX_256X512 BGCNT_SZ(2) +#define BGCNT_SZ_RS_512X512 BGCNT_SZ(2) +#define BGCNT_SZ_TX_512X512 BGCNT_SZ(3) +#define BGCNT_SZ_RS_1024X1024 BGCNT_SZ(3) + +/* REG_IF bits */ +#define IF_VBLANK 0x0001 +#define IF_HBLANK 0x0002 +#define IF_VMATCH 0x0004 +#define IF_TIMER0 0x0008 +#define IF_TIMER1 0x0010 +#define IF_TIMER2 0x0020 +#define IF_TIMER3 0x0040 +#define IF_COMM 0x0080 +#define IF_DMA0 0x0100 +#define IF_DMA1 0x0200 +#define IF_DMA2 0x0400 +#define IF_DMA3 0x0800 +#define IF_KEY 0x1000 +#define IF_GPAK 0x2000 + +/* REG_TMXCNT bits */ +#define TMCNT_PRESCL_CLK1 0 +#define TMCNT_PRESCL_CLK64 1 +#define TMCNT_PRESCL_CLK256 2 +#define TMCNT_PRESCL_CLK1024 3 + +#define TMCNT_CASCADE 0x04 +#define TMCNT_IE 0x40 +#define TMCNT_EN 0x80 + +/* REG_KEY* bits */ +#define KEY_A 0x0001 +#define KEY_B 0x0002 +#define KEY_SELECT 0x0004 +#define KEY_START 0x0008 +#define KEY_RIGHT 0x0010 +#define KEY_LEFT 0x0020 +#define KEY_UP 0x0040 +#define KEY_DOWN 0x0080 +#define KEY_RT 0x0100 +#define KEY_LT 0x0200 + +#define KEYCNT_IE 0x4000 +#define KEYCNT_IAND 0x8000 + +/* REG_SOUNDCNT_L bits */ +#define SCNT_SS_LVOL(x) ((x) & 7) +#define SCNT_SS_RVOL(x) (((x) & 7) << 4) +#define SCNT_SS_VOL(x) (SCNT_SS_LVOL(x) | SCNT_SS_RVOL(x)) +#define SCNT_SS1_EN_R 0x0100 +#define SCNT_SS2_EN_R 0x0200 +#define SCNT_SS3_EN_R 0x0400 +#define SCNT_SS4_EN_R 0x0800 +#define SCNT_SS_EN_R(x) (SCNT_SS1_EN_R << (x)) +#define SCNT_SS1_EN_L 0x1000 +#define SCNT_SS2_EN_L 0x2000 +#define SCNT_SS3_EN_L 0x4000 +#define SCNT_SS4_EN_L 0x8000 +#define SCNT_SS_EN_L(x) (SCNT_SS1_EN_L << (x)) +#define SCNT_SS1_EN (SCNT_SS1_EN_R | SCNT_SS1_EN_L) +#define SCNT_SS2_EN (SCNT_SS2_EN_R | SCNT_SS2_EN_L) +#define SCNT_SS3_EN (SCNT_SS3_EN_R | SCNT_SS3_EN_L) +#define SCNT_SS4_EN (SCNT_SS4_EN_R | SCNT_SS4_EN_L) +#define SCNT_SS_EN(x) (SCNT_SS_EN_L(x) | SCNT_SS_EN_R(x)) + +#define SCNT_SS1 0 +#define SCNT_SS2 1 +#define SCNT_SS3 2 +#define SCNT_SS4 3 + +/* REG_SOUNDCNT_X bits */ +#define SCNT_MASTER_EN 0x0080 + +/* REG_SOUNDCNT_H bits */ +#define SCNT_SS_VOL_QRT 0x0000 +#define SCNT_SS_VOL_HALF 0x0001 +#define SCNT_SS_VOL_FULL 0x0002 +#define SCNT_DSA_VOL_HALF 0 +#define SCNT_DSA_VOL_FULL 0x0004 +#define SCNT_DSB_VOL_HALF 0 +#define SCNT_DSB_VOL_FULL 0x0008 +#define SCNT_DSA_EN_R 0x0100 +#define SCNT_DSA_EN_L 0x0200 +#define SCNT_DSA_TIMER0 0 +#define SCNT_DSA_TIMER1 0x0400 +#define SCNT_DSA_CLRFIFO 0x0800 +#define SCNT_DSB_EN_R 0x1000 +#define SCNT_DSB_EN_L 0x2000 +#define SCNT_DSB_TIMER0 0 +#define SCNT_DSB_TIMER1 0x4000 +#define SCNT_DSB_CLRFIFO 0x8000 + +/* REG_DMAxCNT_H bits */ +#define DMACNT_DST_INC 0 +#define DMACNT_DST_DEC 0x0020 +#define DMACNT_DST_FIXED 0x0040 +#define DMACNT_SRC_INC 0 +#define DMACNT_SRC_DEC 0x0080 +#define DMACNT_SRC_FIXED 0x0100 +#define DMACNT_REPEAT 0x0200 +#define DMACNT_16BIT 0 +#define DMACNT_32BIT 0x0400 +#define DMACNT_VBLANK 0x1000 +#define DMACNT_HBLANK 0x2000 +#define DMACNT_SOUND 0x3000 +#define DMACNT_IEN 0x4000 +#define DMACNT_EN 0x8000 + + +#endif /* GBAREGS_H_ */ diff --git a/src/gfx.h b/src/gfx.h new file mode 100644 index 0000000..5ea579a --- /dev/null +++ b/src/gfx.h @@ -0,0 +1,37 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#ifndef GFX_H_ +#define GFX_H_ + +#include "gbaregs.h" + +#define wait_vblank() while(REG_VCOUNT < 160) + +#define swap_buffers() \ + do { \ + static int vis; \ + vis ^= 0x10; \ + REG_DISPCNT = DISPCNT_BG2 | 4 | vis; \ + } while(0) + +#define set_bg_color(idx, r, g, b) \ + do { \ + ((uint16_t*)CRAM_BG_ADDR)[idx] = (uint16_t)(r) | ((uint16_t)(g) << 5) | ((uint16_t)(b) << 10); \ + } while(0) + +#endif /* GFX_H_ */ diff --git a/src/intr.c b/src/intr.c new file mode 100644 index 0000000..5c2f2c9 --- /dev/null +++ b/src/intr.c @@ -0,0 +1,51 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#include "intr.h" + +#define MAX_INTR 14 +static void (*intr_table[MAX_INTR])(void); + +__attribute__ ((target("arm"))) +static void intr_handler(void) +{ + int i; + uint16_t iflags; + + clr_intr(); + iflags = REG_IF & 0x3fff; + + + for(i=0; i + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#ifndef _INTR_H_ +#define _INTR_H_ + +#include "gbaregs.h" + +/* interrupts */ +enum { + INTR_VBLANK, + INTR_HBLANK, + INTR_VCOUNT, + INTR_TIMER0, + INTR_TIMER1, + INTR_TIMER2, + INTR_TIMER3, + INTR_COMM, + INTR_DMA0, + INTR_DMA1, + INTR_DMA2, + INTR_DMA3, + INTR_KEY, + INTR_GPAK +}; + +void intr_init(void); + +/* set/clear interrupts */ +#define set_intr() \ + do { REG_IME |= 0x0001; } while(0) +#define clr_intr() \ + do { REG_IME &= 0xfffe; } while(0) + +/* set an interrupt handler */ +void interrupt(int intr, void (*handler)(void)); + +/* mask/unmask an interrupt */ +#define mask(intr) do {REG_IE &= ~(1 << (intr));} while(0) +#define unmask(intr) do {REG_IE |= 1 << (intr);} while(0) + +#endif /* _INTR_H_ */ diff --git a/src/keyb.c b/src/keyb.c new file mode 100644 index 0000000..1523461 --- /dev/null +++ b/src/keyb.c @@ -0,0 +1,62 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#include "keyb.h" +#include "gbaregs.h" +#include "timer.h" + +#define NUM_KEYS 10 + +static int rep_start, rep_rep; +static unsigned long first_press[16], last_press[16]; +static uint16_t repmask; + +void key_repeat(int start, int rep, uint16_t mask) +{ + rep_start = start; + rep_rep = rep; + repmask = mask; +} + +void update_keyb(void) +{ + static uint16_t prevstate; + int i; + unsigned long msec = timer_msec; + + keystate = ~REG_KEYINPUT; + keydelta = keystate ^ prevstate; + prevstate = keystate; + + for(i=0; i= rep_start && msec - last_press[i] >= rep_rep) { + keydelta |= bit; + last_press[i] = msec; + } + } + } + } +} diff --git a/src/keyb.h b/src/keyb.h new file mode 100644 index 0000000..930a250 --- /dev/null +++ b/src/keyb.h @@ -0,0 +1,32 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#ifndef KEYB_H_ +#define KEYB_H_ + +#include + +#define KEYPRESS(key) ((keystate & (key)) && (keydelta & (key))) +#define KEYRELEASE(key) ((keystate & (key)) == 0 && (keydelta & (key))) + +uint16_t keystate, keydelta; + +void key_repeat(int start, int rep, uint16_t mask); + +void update_keyb(void); + +#endif /* KEYB_H_ */ diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..0eeaa5a --- /dev/null +++ b/src/main.c @@ -0,0 +1,75 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#include +#include "gbaregs.h" +#include "timer.h" +#include "keyb.h" +#include "intr.h" +#include "gfx.h" + +static void handle_keys(void); + +extern struct { unsigned char r, g, b; } bgimg_cmap[]; +extern unsigned char bgimg_pixels[]; + +int main(void) +{ + int i; + uint16_t *cptr; + unsigned char r, g, b; + + intr_init(); + reset_msec_timer(); + set_intr(); + + /* mode 4: 240x160 8bpp */ + REG_DISPCNT = DISPCNT_BG2 | 4; + + cptr = (uint16_t*)CRAM_BG_ADDR; + for(i=0; i<128; i++) { + r = bgimg_cmap[i].r >> 3; + g = bgimg_cmap[i].g >> 3; + b = bgimg_cmap[i].b >> 3; + *cptr++ = r | (g << 5) | (b << 10); + } + memcpy((void*)VRAM_LFB_FB0_ADDR, bgimg_pixels, 240 * 160); + memcpy((void*)VRAM_LFB_FB1_ADDR, bgimg_pixels, 240 * 160); + + /*key_repeat(500, 75, KEY_LEFT | KEY_RIGHT | KEY_DOWN | KEY_UP);*/ + + for(;;) { + wait_vblank(); + swap_buffers(); + } + + return 0; +} + +static void handle_keys(void) +{ + update_keyb(); + + if(KEYPRESS(KEY_UP)) { + } + if(KEYPRESS(KEY_DOWN)) { + } + if(KEYPRESS(KEY_LEFT)) { + } + if(KEYPRESS(KEY_RIGHT)) { + } +} diff --git a/src/timer.c b/src/timer.c new file mode 100644 index 0000000..a00b0fc --- /dev/null +++ b/src/timer.c @@ -0,0 +1,72 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#include "intr.h" +#include "timer.h" + +#define F_CLK 16780000 +/* clock is 16.78MHz + * - no prescale: 59.595ns + * - prescale 64: 3.814us + * - prescale 256: 15.256us + * - prescale 1024: 61.025us + */ + +static void timer_intr(void); + +void init_timer(int tm, unsigned long rate_hz, void (*intr)(void)) +{ + static const unsigned long clk[] = {F_CLK, F_CLK / 64, F_CLK / 256, F_CLK / 1024}; + unsigned long count; + int pscl = 0; + + do { + count = clk[pscl] / rate_hz; + } while(count >= 65536 && ++pscl < 4); + + if(pscl >= 4) return; /* impossible rate */ + + REG_TMCNT_H(tm) = 0; + REG_TMCNT_L(tm) = 65536 - count; + if(intr) { + interrupt(INTR_TIMER0 + tm, intr); + unmask(INTR_TIMER0 + tm); + REG_TMCNT_H(tm) = TMCNT_IE; + } + REG_TMCNT_H(tm) |= TMCNT_EN | pscl; +} + +void reset_msec_timer(void) +{ + REG_TM0CNT_H &= ~TMCNT_EN; + interrupt(INTR_TIMER0, timer_intr); + timer_msec = 0; + REG_TM0CNT_L = 65535 - 16779; + REG_TM0CNT_H |= TMCNT_IE | TMCNT_EN; + unmask(INTR_TIMER0); +} + +void delay(unsigned long ms) +{ + unsigned long end = timer_msec + ms; + while(timer_msec < end); +} + +static void timer_intr(void) +{ + timer_msec++; +} diff --git a/src/timer.h b/src/timer.h new file mode 100644 index 0000000..214296c --- /dev/null +++ b/src/timer.h @@ -0,0 +1,49 @@ +/* +blender for the Gameboy Advance +Copyright (C) 2021 John Tsiombikas + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ +#ifndef _TIMER_H_ +#define _TIMER_H_ + +#include "gbaregs.h" + +#define enable_timer(x) \ + do { REG_TMCNT_H(x) |= TMCNT_EN; } while(0) + +#define disable_timer(x) \ + do { REG_TMCNT_H(x) &= ~TMCNT_EN; } while(0) + +volatile unsigned long timer_msec; + +void init_timer(int tm, unsigned long rate_hz, void (*intr)(void)); + +void reset_msec_timer(void); + +void delay(unsigned long ms); + +#ifdef __thumb__ +#define udelay(x) asm volatile ( \ + "0: sub %0, %0, #1\n\t" \ + "bne 0b\n\t" \ + :: "r"(x) : "cc") +#else +#define udelay(x) asm volatile ( \ + "0: subs %0, %0, #1\n\t" \ + "bne 0b\n\t" \ + :: "r"(x) : "cc") +#endif + +#endif /* _TIMER_H_ */ diff --git a/tools/pngdump/Makefile b/tools/pngdump/Makefile new file mode 100644 index 0000000..fcd3f4b --- /dev/null +++ b/tools/pngdump/Makefile @@ -0,0 +1,9 @@ +LDFLAGS = -lpng -lz + +pngdump: main.o image.o + $(CC) -o $@ $^ $(LDFLAGS) + +clean: + $(RM) main.o + $(RM) image.o + $(RM) pngdump diff --git a/tools/pngdump/image.c b/tools/pngdump/image.c new file mode 100644 index 0000000..0ae86f9 --- /dev/null +++ b/tools/pngdump/image.c @@ -0,0 +1,237 @@ +#include +#include +#include +#include +#include +#include +#include "image.h" + +int alloc_image(struct image *img, int x, int y, int bpp) +{ + memset(img, 0, sizeof *img); + img->width = x; + img->height = y; + img->bpp = bpp; + img->scansz = img->pitch = x * bpp / 8; + + if(!(img->pixels = malloc(y * img->scansz))) { + fprintf(stderr, "failed to allocate %dx%d (%dbpp) pixel buffer\n", x, y, bpp); + return -1; + } + + /* just a guess, assume the user will fill the details, but set up reasonable + * defaults just in case... + */ + if(bpp <= 8) { + img->nchan = 1; + img->cmap_ncolors = 1 << bpp; + } else if(bpp <= 24) { + img->nchan = 3; + } else { + img->nchan = 4; + } + return 0; +} + +int load_image(struct image *img, const char *fname) +{ + int i; + FILE *fp; + png_struct *png; + png_info *info; + int chan_bits, color_type; + png_uint_32 xsz, ysz; + png_color *palette; + unsigned char **scanline; + unsigned char *dptr; + + if(!(fp = fopen(fname, "rb"))) { + fprintf(stderr, "failed to open: %s: %s\n", fname, strerror(errno)); + return -1; + } + + if(!(png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0))) { + fclose(fp); + return -1; + } + if(!(info = png_create_info_struct(png))) { + fclose(fp); + png_destroy_read_struct(&png, 0, 0); + return -1; + } + if(setjmp(png_jmpbuf(png))) { + fclose(fp); + png_destroy_read_struct(&png, &info, 0); + return -1; + } + + png_init_io(png, fp); + png_read_png(png, info, 0, 0); + + png_get_IHDR(png, info, &xsz, &ysz, &chan_bits, &color_type, 0, 0, 0); + img->width = xsz; + img->height = ysz; + img->nchan = png_get_channels(png, info); + img->bpp = img->nchan * chan_bits; + img->scansz = img->pitch = xsz * img->bpp / 8; + img->cmap_ncolors = 0; + + if(color_type == PNG_COLOR_TYPE_PALETTE) { + png_get_PLTE(png, info, &palette, &img->cmap_ncolors); + memcpy(img->cmap, palette, img->cmap_ncolors * sizeof *img->cmap); + } + + if(!(img->pixels = malloc(ysz * img->scansz))) { + perror("failed to allocate pixel buffer"); + fclose(fp); + png_destroy_read_struct(&png, &info, 0); + return -1; + } + dptr = img->pixels; + + scanline = (unsigned char**)png_get_rows(png, info); + for(i=0; iscansz); + dptr += img->pitch; + } + + fclose(fp); + png_destroy_read_struct(&png, &info, 0); + return 0; +} + +int save_image(struct image *img, const char *fname) +{ + int i, chan_bits, coltype; + FILE *fp; + png_struct *png; + png_info *info; + png_text txt; + unsigned char **scanline = 0; + unsigned char *pptr; + + if(!(fp = fopen(fname, "wb"))) { + fprintf(stderr, "save_image: failed to open: %s: %s\n", fname, strerror(errno)); + return -1; + } + + if(!(png = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0))) { + fclose(fp); + return -1; + } + if(!(info = png_create_info_struct(png))) { + png_destroy_write_struct(&png, 0); + fclose(fp); + return -1; + } + + txt.compression = PNG_TEXT_COMPRESSION_NONE; + txt.key = "Software"; + txt.text = "img2tiles"; + txt.text_length = 0; + + if(setjmp(png_jmpbuf(png))) { + png_destroy_write_struct(&png, &info); + free(scanline); + fclose(fp); + return -1; + } + + switch(img->nchan) { + case 1: + if(img->cmap_ncolors > 0) { + coltype = PNG_COLOR_TYPE_PALETTE; + } else { + coltype = PNG_COLOR_TYPE_GRAY; + } + break; + case 2: + coltype = PNG_COLOR_TYPE_GRAY_ALPHA; + break; + case 3: + coltype = PNG_COLOR_TYPE_RGB; + break; + case 4: + coltype = PNG_COLOR_TYPE_RGB_ALPHA; + break; + } + + chan_bits = img->bpp / img->nchan; + png_set_IHDR(png, info, img->width, img->height, chan_bits, coltype, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); + png_set_text(png, info, &txt, 1); + + if(img->cmap_ncolors > 0) { + png_set_PLTE(png, info, (png_color*)img->cmap, img->cmap_ncolors); + } + + if(!(scanline = malloc(img->height * sizeof *scanline))) { + png_destroy_write_struct(&png, &info); + fclose(fp); + return -1; + } + + pptr = img->pixels; + for(i=0; iheight; i++) { + scanline[i] = pptr; + pptr += img->pitch; + } + png_set_rows(png, info, scanline); + + png_init_io(png, fp); + png_write_png(png, info, 0, 0); + png_destroy_write_struct(&png, &info); + free(scanline); + fclose(fp); + return 0; +} + + +int cmp_image(struct image *a, struct image *b) +{ + int i; + unsigned char *aptr = a->pixels; + unsigned char *bptr = b->pixels; + + if(a->width != b->width || a->height != b->height || a->bpp != b->bpp || a->nchan != b->nchan) { + return -1; + } + + for(i=0; iheight; i++) { + if(memcmp(aptr, bptr, a->scansz) != 0) { + return -1; + } + aptr += a->pitch; + bptr += b->pitch; + } + return 0; +} + +void blit(struct image *src, int sx, int sy, int w, int h, struct image *dst, int dx, int dy) +{ + int i; + unsigned char *sptr, *dptr; + + assert(src->bpp == dst->bpp); + assert(src->nchan == dst->nchan); + + if(sx < 0) { w += sx; sx = 0; } + if(sy < 0) { h += sy; sy = 0; } + if(dx < 0) { w += dx; sx -= dx; dx = 0; } + if(dy < 0) { h += dy; sy -= dy; dy = 0; } + if(sx + w >= src->width) w = src->width - sx; + if(sy + h >= src->height) h = src->height - sy; + if(dx + w >= dst->width) w = dst->width - dx; + if(dy + h >= dst->height) h = dst->height - dy; + + if(w <= 0 || h <= 0) return; + + sptr = src->pixels + sy * src->pitch + sx * src->bpp / 8; + dptr = dst->pixels + dy * dst->pitch + dx * dst->bpp / 8; + + for(i=0; ibpp / 8); + dptr += dst->pitch; + sptr += src->pitch; + } +} diff --git a/tools/pngdump/image.h b/tools/pngdump/image.h new file mode 100644 index 0000000..b9f24b4 --- /dev/null +++ b/tools/pngdump/image.h @@ -0,0 +1,26 @@ +#ifndef IMAGE_H_ +#define IMAGE_H_ + +struct cmapent { + unsigned char r, g, b; +}; + +struct image { + int width, height; + int bpp; + int nchan; + int scansz, pitch; + int cmap_ncolors; + struct cmapent cmap[256]; + unsigned char *pixels; +}; + +int alloc_image(struct image *img, int x, int y, int bpp); +int load_image(struct image *img, const char *fname); +int save_image(struct image *img, const char *fname); + +int cmp_image(struct image *a, struct image *b); + +void blit(struct image *src, int sx, int sy, int w, int h, struct image *dst, int dx, int dy); + +#endif /* IMAGE_H_ */ diff --git a/tools/pngdump/main.c b/tools/pngdump/main.c new file mode 100644 index 0000000..a2b37fd --- /dev/null +++ b/tools/pngdump/main.c @@ -0,0 +1,125 @@ +#include +#include +#include +#include +#include "image.h" + +void print_usage(const char *argv0); + +int main(int argc, char **argv) +{ + int i, mode = 0; + int text = 0; + char *fname = 0, *outfname = 0; + struct image img; + FILE *out = stdout; + + for(i=1; i 0) { + printf("colormap entries: %d\n", img.cmap_ncolors); + } else { + printf("color channels: %d\n", img.nchan); + } + break; + } + + fclose(out); + return 0; +} + +void print_usage(const char *argv0) +{ + printf("Usage: %s [options] \n", argv0); + printf("Options:\n"); + printf(" -p: dump pixels (default)\n"); + printf(" -c: dump colormap (palette) entries\n"); + printf(" -i: print image information\n"); + printf(" -t: dump as text\n"); + printf(" -h: print usage and exit\n"); +}