I am working on a gameboy project for a class asignment. I was told, that we needed to have a separate “functions” file, and “main” file. I am going insane doing this. I have made a header file “myLib.h”, and in it I include definitions, and prototypes of the functions that are in “myLib.c”. In my main file, I call a function from “myLib.c”, and it compiles, but will not work. I have added “myLib.c” to my make file. The files are below:
myLib.h
typedef unsigned short u16;
typedef unsigned char u8;
typedef unsigned int u32;
#define REG_DISPCTL *(unsigned short *)0x4000000
#define MODE3 3
#define BG2_ENABLE (1<<10)
#define SCANLINECOUNTER *(volatile u16 *)0x4000006
#define COLOR(r, g, b) ((r) | (g)<<5 | (b)<<10)
#define RED COLOR(31,0,0)
#define GREEN COLOR(0,31,0)
#define BLUE COLOR(0,0,31)
#define MAGENTA COLOR(31, 0, 31)
#define YELLOW COLOR(31, 31, 0)
#define CYAN COLOR(0,31,31)
#define WHITE COLOR(31,31,31)
#define BLACK 0
#define OFFSET(r, c, numcols) ((r)*(numcols) + (c))
extern unsigned short *videoBuffer;
// Buttons
#define BUTTON_A (1<<0)
#define BUTTON_B (1<<1)
#define BUTTON_SELECT (1<<2)
#define BUTTON_START (1<<3)
#define BUTTON_RIGHT (1<<4)
#define BUTTON_LEFT (1<<5)
#define BUTTON_UP (1<<6)
#define BUTTON_DOWN (1<<7)
#define BUTTON_R (1<<8)
#define BUTTON_L (1<<9)
#define BUTTONS *(unsigned int *)0x4000130
#define KEY_DOWN_NOW(key) (~(BUTTONS) & key)
/* DMA */
typedef struct
{
const volatile void *src;
const volatile void *dst;
u32 cnt;
} DMA_CONTROLLER;
#define DMA ((volatile DMA_CONTROLLER *) 0x040000B0)
#define REG_DMA0SAD *(const volatile u32*)0x40000B0 // source address
#define REG_DMA0DAD *(volatile u32*)0x40000B4 // destination address
#define REG_DMA0CNT *(volatile u32*)0x40000B8 // control register
// DMA channel 1 register definitions
#define REG_DMA1SAD *(const volatile u32*)0x40000BC // source address
#define REG_DMA1DAD *(volatile u32*)0x40000C0 // destination address
#define REG_DMA1CNT *(volatile u32*)0x40000C4 // control register
// DMA channel 2 register definitions
#define REG_DMA2SAD *(const volatile u32*)0x40000C8 // source address
#define REG_DMA2DAD *(volatile u32*)0x40000CC // destination address
#define REG_DMA2CNT *(volatile u32*)0x40000D0 // control register
// DMA channel 3 register definitions
#define REG_DMA3SAD *(volatile u32*)0x40000D4 // source address
#define REG_DMA3DAD *(volatile u32*)0x40000D8 // destination address
#define REG_DMA3CNT *(volatile u32*)0x40000DC // control register
// Defines
#define DMA_CHANNEL_0 0
#define DMA_CHANNEL_1 1
#define DMA_CHANNEL_2 2
#define DMA_CHANNEL_3 3
#define DMA_DESTINATION_INCREMENT (0 << 21)
#define DMA_DESTINATION_DECREMENT (1 << 21)
#define DMA_DESTINATION_FIXED (2 << 21)
#define DMA_DESTINATION_RESET (3 << 21)
#define DMA_SOURCE_INCREMENT (0 << 23)
#define DMA_SOURCE_DECREMENT (1 << 23)
#define DMA_SOURCE_FIXED (2 << 23)
#define DMA_REPEAT (1 << 25)
#define DMA_16 (0 << 26)
#define DMA_32 (1 << 26)
#define DMA_NOW (0 << 28)
#define DMA_AT_VBLANK (1 << 28)
#define DMA_AT_HBLANK (2 << 28)
#define DMA_AT_REFRESH (3 << 28)
#define DMA_IRQ (1 << 30)
#define DMA_ON (1 << 31)
// Prototypes
void setPixel(int , int , u16 );
void drawRect(int row, int col, int height, int width, u16 color);
void waitForVblank();
void fillScreen(u16 color);
void delay(int);
myLib.c
#include "myLib.h"
unsigned short *videoBuffer = (unsigned short *)0x6000000;
void setPixel(int row, int col, u16 color)
{
videoBuffer[OFFSET(row, col, 240)] = color;
}
void drawRect(int row, int col, int height, int width,
volatile u16 color)
{
int r;
for(r=0;r<height; r++)
{
REG_DMA3SAD = (u32)&color;
REG_DMA3DAD = (u32)(&videoBuffer[OFFSET(row+r, col, 240)]);
REG_DMA3CNT = width | DMA_SOURCE_FIXED |
DMA_DESTINATION_INCREMENT | DMA_ON;
}
}
void waitForVblank()
{
while(SCANLINECOUNTER > 160);
while(SCANLINECOUNTER < 160);
}
void fillScreen(volatile u16 color)
{
REG_DMA3SAD = (u32)&color;
REG_DMA3DAD = (u32)videoBuffer;
REG_DMA3CNT = (160*240) | DMA_SOURCE_FIXED |
DMA_DESTINATION_INCREMENT | DMA_ON;
}
void delay(int n)
{
int i;
volatile int x;
for(i=0; i<10000*n; i++)
{
x = x + 1;
}
}
main.c
#include <stdio.h>
#include <stdlib.h>
#include "myLib.h"
int main() {
int i = 0;
int j = 0;
for(i = 0; i < 160; i++){
for(j = 0; j < 240; j++){
{
setPixel(i, j, RED);
}
}
}
return (EXIT_SUCCESS);
}
Makefile
########################################
## CS1372 Dual GBA/Console Makefile ##
## Updated: 1/08/2010 - Drew Bratcher ##
########################################
# Student instructions:
# - Ensure that the paths are correct
# - Edit the SOURCES line with a space-separated list of your .c files
# - Keep updating SOURCES every time you add a new source file
# - Select "Release" in NetBeans if this is a GBA project
# - Select "Debug" in NetBeans if this is a console project
# - Make sure the Linker Output in NetBeans is set to "Program" for all configurations
# --- Project Settings (Change these for your proejct)
# PRODUCT_NAME should match your Linker Output in NetBeans
# SOURCES should be The .c files in your project
PRODUCT_NAME = Program
###### LIST ALL C Files in your project here
SOURCES = main.c myLib.c
###### --- System Settings (Update these for your system)
###### Mac example paths
DKPATH = C:/CS1372-Tools/devkitARM/devkitARM/bin
CCPATH = C:/cygwin/bin
VBASIM = C:/CS1372-Tools/VisualBoyAdvance-1.7.2/VisualBoyAdvance.exe
#DKPATH = C:/devkitARM/bin
#CCPATH = C:/cygwin/bin
#VBASIM = C:/
FIND = find
COPY = cp -r
# --- File Names
ELF_NAME = $(PRODUCT_NAME).elf
ROM_NAME = $(PRODUCT_NAME).gba
BIN_NAME = $(PRODUCT_NAME)
# --- Debug and Release Selection
# Don't change this or it'll break your Makefile
# If you need to override the selection, uncomment one:
#CONF = Debug
#CONF = Release
ifeq ($(CONF),Debug)
DEBUG = yes
endif
ifndef DEBUG
# ============ RELEASE MODE
# --- GBA Settings
MODEL = -mthumb-interwork -mthumb
SPECS = -specs=gba.specs
# --- Archiver
AS = $(DKPATH)/arm-eabi-as
ASFLAGS = -mthumb-interwork
# --- Compiler
CC = $(DKPATH)/arm-eabi-gcc
CFLAGS = $(MODEL) -O2 -Wall -pedantic -Wextra -Werror -ansi -std=c99 -D_ROM=$(ROM_NAME) -D_VBA=$(VBASIM)
CC_WRAP = $(CCPATH)/gcc
CFLAGS_WRAP = -O2 -Wall -pedantic -Wextra -Werror -ansi -std=c99 -D_ROM='"$(ROM_NAME)"' -D_VBA='"$(VBASIM)"'
# --- Linker
LD = $(DKPATH)/arm-eabi-gcc
LDFLAGS = $(SPECS) $(MODEL) -lm
# --- Object/Executable Packager
OBJCOPY = $(DKPATH)/arm-eabi-objcopy
OBJCOPYFLAGS = -O binary
# --- ROM Fixer
GBAFIX = $(DKPATH)/gbafix
# --- Delete
RM = rm -f
OBJECTS = $(filter-out gba_wrapper%,$(SOURCES:.c=.o))
# --- Main build target
all : build $(BIN_NAME)
run : build
$(VBASIM) $(ROM_NAME)
build : UNZIP $(ROM_NAME)
$(BIN_NAME) : gba_wrapper.c
$(CC_WRAP) $(CFLAGS_WRAP) -o $@ $^
# --- Build .elf file into .gba ROM file
$(ROM_NAME) : $(ELF_NAME)
$(OBJCOPY) $(OBJCOPYFLAGS) $(ELF_NAME) $(ROM_NAME)
$(GBAFIX) $(ROM_NAME)
# --- Build .o files into .elf file
$(ELF_NAME) : $(OBJECTS)
$(LD) $(OBJECTS) $(LDFLAGS) -o $@
# -- Build .c files into .o files
$(OBJECTS) : %.o : %.c
$(CC) $(CFLAGS) -c $< -o $@
# ============ RELEASE MODE
else
# ============ DEBUG MODE
# --- Compiler
CC = $(CCPATH)/gcc
CFLAGS = -D_DEBUG -O2 -Wall -pedantic -Wextra -Werror -ansi -std=c99 -ggdb
all : build
run : build
./$(BIN_NAME)
clean :
build : UNZIP $(BIN_NAME)
$(BIN_NAME) : $(SOURCES)
$(CC) -o $(BIN_NAME) $(CFLAGS) $(SOURCES)
# ============ DEBUG MODE
endif
# ============ Common
UNZIP :
-@$(FIND) . -iname "*.zip" -exec unzip -n {} \; -exec echo "This project must be rebuilt" \; -exec rm {} \;
clean:
$(RM) $(ROM_NAME)
$(RM) $(ELF_NAME)
$(RM) $(BIN_NAME)
$(RM) *.o
# ============ Common
I was missing the line
REG_DISPCTL = MODE3 | BG2_ENABLE;