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tune.c
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tune.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include "address_map_arm_brl4.h"
typedef unsigned int fix_3_29; // 3:29 fixed point
// returns a float f to fixed point representation
#define float2fix(a) ((fix_3_29)((a)*536870912.0) & 0xFFFFFFFF)
// Graphics macros
#define SLIDER_X_INDENT 50
#define SLIDER_Y_INDENT 38
#define SLIDER_SPACE 10
#define SLIDER_WIDTH 509
#define SLIDER_BUTTON_WIDTH 10
#define SLIDER_COLOR 0xff
#define BOTTOM_SLIDER_Y_OFFSET (22 + SLIDER_BUTTON_WIDTH)
#define SLIDER_START (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH + SLIDER_SPACE)
#define SLIDER_END (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH + SLIDER_SPACE + SLIDER_WIDTH)
#define SLIDER_BAR_WIDTH 5
#define SLIDER_BAR_COLOR 0xe0
#define BUTTON_STEP 21
#define INIT_SLIDER_BAR (SLIDER_START + 12*BUTTON_STEP)
#define BLACK 0x00
#define HALF_STEP_UP (1.0594630944)
#define HALF_STEP_DOWN (0.9438743127)
#define TRIANGLE_STEP (4)
#define TL_BUTTON_X_START (SLIDER_X_INDENT)
#define TL_BUTTON_X_END (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH)
#define TL_BUTTON_Y_START (SLIDER_Y_INDENT)
#define TL_BUTTON_Y_END (SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH)
#define TR_BUTTON_X_START (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH + SLIDER_SPACE * 2 + SLIDER_WIDTH)
#define TR_BUTTON_Y_START (SLIDER_Y_INDENT)
#define TR_BUTTON_X_END (SLIDER_X_INDENT + 2 * SLIDER_BUTTON_WIDTH + SLIDER_SPACE * 2 + SLIDER_WIDTH)
#define TR_BUTTON_Y_END (SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH)
#define BL_BUTTON_X_START (SLIDER_X_INDENT)
#define BL_BUTTON_Y_START (SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET)
#define BL_BUTTON_X_END (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH)
#define BL_BUTTON_Y_END (SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH)
#define BR_BUTTON_X_START (SLIDER_X_INDENT + SLIDER_BUTTON_WIDTH + SLIDER_SPACE * 2 + SLIDER_WIDTH)
#define BR_BUTTON_Y_START (SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET)
#define BR_BUTTON_X_END (SLIDER_X_INDENT + 2 * SLIDER_BUTTON_WIDTH + SLIDER_SPACE * 2 + SLIDER_WIDTH)
#define BR_BUTTON_Y_END (SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH)
#define BUTTON_ROW_Y 100
#define BUTTON_ROW_X 183
#define BUTTON_WIDTH 60
#define TRIANGLE_OFFSET 397
#define TRIANGLE_MODE_COLOR 0xe0
#define TRIANGLE_LEFT_X_START (BUTTON_ROW_X)
#define TRIANGLE_LEFT_X_END (BUTTON_ROW_X + BUTTON_WIDTH)
#define TRIANGLE_LEFT_Y_START (BUTTON_ROW_Y)
#define TRIANGLE_LEFT_Y_END (BUTTON_ROW_Y + BUTTON_WIDTH)
#define TRIANGLE_LEFT_COLOR 0x03
#define TRIANGLE_RIGHT_X_START (TRIANGLE_OFFSET)
#define TRIANGLE_RIGHT_X_END (BUTTON_WIDTH + TRIANGLE_OFFSET)
#define TRIANGLE_RIGHT_Y_START (BUTTON_ROW_Y)
#define TRIANGLE_RIGHT_Y_END (BUTTON_ROW_Y + BUTTON_WIDTH)
#define TRIANGLE_RIGHT_COLOR 0x03
#define RESET_X_START 290
#define RESET_X_END 350
#define RESET_Y_START 240
#define RESET_Y_END 300
#define RESET_COLOR 0x1c //Green
// function prototypes
void VGA_text(int, int, char*);
void VGA_text_clear();
void VGA_box(int, int, int, int, short);
void VGA_line(int, int, int, int, short);
void VGA_disc(int, int, int, short);
char VGA_PIXEL_GET_COLOR(int, int);
void delay(int x) {
int i,j;
for (i = 0; i < 256; i++)
for (j = 0; j < x; j++) {}
}
// pixel macro
#define VGA_PIXEL(x,y,color) do{ \
char* pixel_ptr; \
pixel_ptr = (char*)vga_pixel_ptr + ((y)<<10) + (x); \
*(char*)pixel_ptr = (color); \
} while(0)
// the light weight bus base
void *h2p_lw_virtual_base;
volatile unsigned int* h2p_lw_reset = NULL;
volatile unsigned int* h2p_lw_delta_left = NULL;
volatile unsigned int* h2p_lw_delta_right = NULL;
volatile unsigned int* h2p_lw_triangle_right = NULL;
volatile unsigned int* h2p_lw_triangle_left = NULL;
volatile unsigned int* h2p_lw_delta_mode_right = NULL;
volatile unsigned int* h2p_lw_delta_mode_left = NULL;
// pixel buffer
volatile unsigned int* vga_pixel_ptr = NULL;
void* vga_pixel_virtual_base;
// character buffer
volatile unsigned int* vga_char_ptr = NULL;
void* vga_char_virtual_base;
// /dev/mem file id
int fd;
// mouse variables
int fmouse; // /dev/input/mice
int bytes; // bytes read from mouse
unsigned char mouse_data[3]; // mouse clicking and movement data
const char* pDevice = "/dev/input/mice"; // mouse location
int main(void){
//////////////////////////////////////////////////////////////////////////////
// SETUP I/O
//////////////////////////////////////////////////////////////////////////////
// get FPGA addresses
fd = open("/dev/mem", (O_RDWR | O_SYNC));
if (fd == -1){
printf( "ERROR: could not open \"/dev/mem\"...\n" );
return(1);
}
// get virtual addr that maps to physical
h2p_lw_virtual_base = mmap(NULL, HW_REGS_SPAN, (PROT_READ | PROT_WRITE),
MAP_SHARED, fd, HW_REGS_BASE);
if (h2p_lw_virtual_base == MAP_FAILED){
printf("ERROR: mmap() failed...\n");
close(fd);
return(1);
}
// get virtual addr that maps to physical
vga_pixel_virtual_base = mmap(NULL, FPGA_ONCHIP_SPAN, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, FPGA_ONCHIP_BASE);
if (vga_pixel_virtual_base == MAP_FAILED) {
printf("ERROR: mmap3() failed...\n");
close(fd);
return(1);
}
vga_pixel_ptr = (unsigned int*)(vga_pixel_virtual_base);
// === get VGA char addr =====================
// get virtual addr that maps to physical
vga_char_virtual_base = mmap(NULL, FPGA_CHAR_SPAN, (PROT_READ | PROT_WRITE),
MAP_SHARED, fd, FPGA_CHAR_BASE);
if( vga_char_virtual_base == MAP_FAILED ){
printf( "ERROR: mmap2() failed...\n" );
close( fd );
return(1);
}
// Get the address that maps to the char buffer control
vga_char_ptr =(unsigned int*)(vga_char_virtual_base);
// get pointers
h2p_lw_reset = (unsigned int*)(h2p_lw_virtual_base + (RESET_BASE));
h2p_lw_delta_left = (unsigned int*)(h2p_lw_virtual_base + (DELTA_LEFT_BASE));
h2p_lw_delta_right = (unsigned int*)(h2p_lw_virtual_base + (DELTA_RIGHT_BASE));
h2p_lw_triangle_right = (unsigned int*)(h2p_lw_virtual_base + (TRIANGLE_RIGHT_BASE));
h2p_lw_triangle_left = (unsigned int*)(h2p_lw_virtual_base + (TRIANGLE_LEFT_BASE));
h2p_lw_delta_mode_left = (unsigned int*)(h2p_lw_virtual_base + (DELTA_MODE_LEFT_BASE));
h2p_lw_delta_mode_right = (unsigned int*)(h2p_lw_virtual_base + (DELTA_MODE_RIGHT_BASE));
// Open the mouse
fmouse = open(pDevice, O_RDWR | O_NONBLOCK);
if (fmouse == -1){
printf("ERROR Opening %s\n", pDevice);
close(fmouse);
return -1;
}
// Read mouse
int left, middle, right;
int cursor_x, cursor_y;
signed char x, y;
char old_color[4];
// initial mouse to the top left corner
cursor_x = 1;
cursor_y = 1;
old_color[0] = VGA_PIXEL_GET_COLOR(cursor_x, cursor_y);
old_color[1] = VGA_PIXEL_GET_COLOR(cursor_x+1, cursor_y);
old_color[2] = VGA_PIXEL_GET_COLOR(cursor_x, cursor_y+1);
old_color[3] = VGA_PIXEL_GET_COLOR(cursor_x+1, cursor_y+1);
//////////////////////////////////////////////////////////////////////////////
// MAIN LOOP
//////////////////////////////////////////////////////////////////////////////
int i;
char text_top_row[40] = "DE1-SoC ARM/FPGA\0";
char text_bottom_row[40] = "Cornell ece5760 swc63 jmt329 gzm3\0";
char reset_text[40] = "RESET\0";
char left_text[40] = "LEFT\0";
char right_text[40] = "RIGHT\0";
char left_delta_text[40] = "\0";
char right_delta_text[40] = "\0";
char left_triangle_text[40] = "\0";
char right_triangle_text[40] = "\0";
char triangle_mode[40] = "Modulation Mode \0";
char delta_mode[40] = "Pitch Shift Mode\0";
VGA_text_clear();
VGA_box(0, 0, 639, 479, 0x00);
VGA_text (1, 1, text_top_row);
VGA_text (1, 2, text_bottom_row);
VGA_text (38, 33, reset_text);
VGA_text (1, 5, left_text);
VGA_text (1, 9, right_text);
VGA_text (25, 16, left_text);
VGA_text (51, 16, right_text);
// Triangle Left Button
VGA_box(TRIANGLE_LEFT_X_START,
TRIANGLE_LEFT_Y_START,
TRIANGLE_LEFT_X_END,
TRIANGLE_LEFT_Y_END,
TRIANGLE_LEFT_COLOR);
// Triangle Right Button
VGA_box(TRIANGLE_RIGHT_X_START,
TRIANGLE_RIGHT_Y_START,
TRIANGLE_RIGHT_X_END,
TRIANGLE_RIGHT_Y_END,
TRIANGLE_RIGHT_COLOR);
// Reset Button
VGA_box(RESET_X_START,
RESET_Y_START,
RESET_X_END,
RESET_Y_END,
RESET_COLOR);
// Top slider left button
VGA_box(TL_BUTTON_X_START,
TL_BUTTON_Y_START,
TL_BUTTON_X_END,
TL_BUTTON_Y_END,
SLIDER_COLOR);
// Top slider right button
VGA_box(TR_BUTTON_X_START,
TR_BUTTON_Y_START,
TR_BUTTON_X_END,
TR_BUTTON_Y_END,
SLIDER_COLOR);
// Bottom slider left button
VGA_box(BL_BUTTON_X_START,
BL_BUTTON_Y_START,
BL_BUTTON_X_END,
BL_BUTTON_Y_END,
SLIDER_COLOR);
// Bottom slider right button
VGA_box(BR_BUTTON_X_START,
BR_BUTTON_Y_START,
BR_BUTTON_X_END,
BR_BUTTON_Y_END,
SLIDER_COLOR);
// Top Slider
VGA_box(SLIDER_START,
SLIDER_Y_INDENT,
SLIDER_END,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Bottom Slider
VGA_box(SLIDER_START,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
SLIDER_END,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Initialize slider bar for top
int top_slider_x = INIT_SLIDER_BAR;
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
// Initialize slider bar for bottom
int bottom_slider_x = INIT_SLIDER_BAR;
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
*h2p_lw_reset = 0;
*h2p_lw_delta_left = (float2fix(1.0));
double delta_left = 1.0;
*h2p_lw_delta_right = (float2fix(1.0));
double delta_right = 1.0;
*h2p_lw_delta_mode_right = 1;
*h2p_lw_delta_mode_left = 1;
*h2p_lw_triangle_right = 188;
*h2p_lw_triangle_left = 188;
if (*h2p_lw_delta_mode_left){
sprintf(left_delta_text, "%.5f\0", delta_left);
VGA_text(20, 21, delta_mode);
}
else{
sprintf(left_delta_text, "%.5f\0", 513.0*((float)(*h2p_lw_triangle_left))/(96000.0));
VGA_text(20, 21, triangle_mode);
}
VGA_text(36, 7, " \0");
VGA_text(36, 7, left_delta_text);
if (*h2p_lw_delta_mode_right){
sprintf(right_delta_text, "%.5f\0", delta_right);
VGA_text(45, 21, delta_mode);
}
else{
sprintf(right_delta_text, "%.5f\0", 513.0*((float)(*h2p_lw_triangle_right))/(96000.0));
VGA_text(45, 21, triangle_mode);
}
VGA_text(36, 11, " \0");
VGA_text(36, 11, right_delta_text);
while(1){
bytes = read(fmouse, mouse_data, sizeof(mouse_data));
if (bytes > 0){
left = mouse_data[0] & 0x1;
right = mouse_data[0] & 0x2;
middle = mouse_data[0] & 0x4;
x = mouse_data[1];
y = mouse_data[2];
// reset pixel where cursor was
//VGA_box(cursor_x, cursor_y, cursor_x+2, cursor_y+2, 0xff);
VGA_PIXEL(cursor_x, cursor_y, old_color[0]);
VGA_PIXEL(cursor_x+1, cursor_y, old_color[1]);
VGA_PIXEL(cursor_x, cursor_y+1, old_color[2]);
VGA_PIXEL(cursor_x+1, cursor_y+1, old_color[3]);
// update cursor position
cursor_x += x;
cursor_y -= y;
if(cursor_x < 0) cursor_x = 0;
if(cursor_x >= 639) cursor_x = 638;
if(cursor_y < 0) cursor_y = 0;
if(cursor_y >= 479) cursor_y = 478;
//VGA_box(cursor_x, cursor_y, cursor_x+2, cursor_y+2, 0x1c);
old_color[0] = VGA_PIXEL_GET_COLOR(cursor_x, cursor_y);
old_color[1] = VGA_PIXEL_GET_COLOR(cursor_x+1, cursor_y);
old_color[2] = VGA_PIXEL_GET_COLOR(cursor_x, cursor_y+1);
old_color[3] = VGA_PIXEL_GET_COLOR(cursor_x+1, cursor_y+1);
VGA_PIXEL(cursor_x, cursor_y, 0xe0);
VGA_PIXEL(cursor_x+1, cursor_y, 0xe0);
VGA_PIXEL(cursor_x, cursor_y+1, 0xe0);
VGA_PIXEL(cursor_x+1, cursor_y+1, 0xe0);
// check mouse clicks
if (left){
// on left click
// If the mouse is on one of the slider buttons, redraw slider bar, set new delta
// Top Slider
// Top left slider button
if (cursor_x > TL_BUTTON_X_START && cursor_x < TL_BUTTON_X_END &&
cursor_y > TL_BUTTON_Y_START && cursor_y < TL_BUTTON_Y_END){
// Move down if possible
if (top_slider_x >= SLIDER_START + BUTTON_STEP){
// Draw over old position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
top_slider_x -= BUTTON_STEP;
if (*h2p_lw_delta_mode_left){
delta_left = delta_left * (HALF_STEP_DOWN);
*h2p_lw_delta_left = (float2fix(delta_left));
}
else{
*h2p_lw_triangle_left += TRIANGLE_STEP;
}
// Draw new position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
}
// Top right slider button
if (cursor_x > TR_BUTTON_X_START && cursor_x < TR_BUTTON_X_END &&
cursor_y > TR_BUTTON_Y_START && cursor_y < TR_BUTTON_Y_END){
if ((top_slider_x + SLIDER_BAR_WIDTH) <= (SLIDER_END - BUTTON_STEP)){
// Draw over old position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
top_slider_x += BUTTON_STEP;
if (*h2p_lw_delta_mode_left){
delta_left = delta_left * (HALF_STEP_UP);
*h2p_lw_delta_left = (float2fix(delta_left));
}
else{
*h2p_lw_triangle_left -= TRIANGLE_STEP;
}
// Draw new position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
}
printf("LEFT: %f\n", delta_left);
printf("LEFT: %08X\n", (*h2p_lw_delta_left));
// Bottom Slider
// Bottom left slider button
if (cursor_x > BL_BUTTON_X_START && cursor_x < BL_BUTTON_X_END &&
cursor_y > BL_BUTTON_Y_START && cursor_y < BL_BUTTON_Y_END){
// Move down if possible
if (bottom_slider_x >= SLIDER_START + BUTTON_STEP){
// Draw over old position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
bottom_slider_x -= BUTTON_STEP;
if (*h2p_lw_delta_mode_right){
delta_right = delta_right * (HALF_STEP_DOWN);
*h2p_lw_delta_right = (float2fix(delta_right));
}
else{
*h2p_lw_triangle_right += TRIANGLE_STEP;
}
// Draw new position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
}
// Bottom right slider button
if (cursor_x > BR_BUTTON_X_START && cursor_x < BR_BUTTON_X_END &&
cursor_y > BR_BUTTON_Y_START && cursor_y < BR_BUTTON_Y_END){
if ((bottom_slider_x + SLIDER_BAR_WIDTH) <= (SLIDER_END - BUTTON_STEP)){
// Draw over old position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
bottom_slider_x += BUTTON_STEP;
if (*h2p_lw_delta_mode_right){
delta_right = delta_right * (HALF_STEP_UP);
*h2p_lw_delta_right = (float2fix(delta_right));
}
else{
*h2p_lw_triangle_right -= TRIANGLE_STEP;
}
// Draw new position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
}
printf("RIGHT: %f\n", delta_right);
printf("RIGHT: %08X\n", (*h2p_lw_delta_right));
// Triangle Left button
// Put sliders back into middle, starting position, reset deltas/triangle settings
if (cursor_x > TRIANGLE_LEFT_X_START && cursor_x < TRIANGLE_LEFT_X_END &&
cursor_y > TRIANGLE_LEFT_Y_START && cursor_y < TRIANGLE_LEFT_Y_END){
// Toggle the left triangle/delta mode
if (*h2p_lw_delta_mode_left){
// Change to triangle mode
*h2p_lw_delta_mode_left = !(*h2p_lw_delta_mode_left);
// Draw new color, indicating triangle mode
// Triangle Left Button
VGA_box(TRIANGLE_LEFT_X_START,
TRIANGLE_LEFT_Y_START,
TRIANGLE_LEFT_X_END,
TRIANGLE_LEFT_Y_END,
TRIANGLE_MODE_COLOR);
}
else{
// Change to delta mode
*h2p_lw_delta_mode_left = !(*h2p_lw_delta_mode_left);
// Draw new color, indicating delta mode
// Triangle Left Button
VGA_box(TRIANGLE_LEFT_X_START,
TRIANGLE_LEFT_Y_START,
TRIANGLE_LEFT_X_END,
TRIANGLE_LEFT_Y_END,
TRIANGLE_LEFT_COLOR);
}
// Reset the sliders
// Top Slider
// Draw over old position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
top_slider_x = INIT_SLIDER_BAR;
delta_left = 1.0;
*h2p_lw_delta_left = (float2fix(delta_left));
*h2p_lw_triangle_left = 188;
// Draw new position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
// Triangle Right button
// Put sliders back into middle, starting position, reset deltas/triangle settings
if (cursor_x > TRIANGLE_RIGHT_X_START && cursor_x < TRIANGLE_RIGHT_X_END &&
cursor_y > TRIANGLE_RIGHT_Y_START && cursor_y < TRIANGLE_RIGHT_Y_END){
// Toggle the right triangle/delta mode
if (*h2p_lw_delta_mode_right){
// Change to triangle mode
*h2p_lw_delta_mode_right = !(*h2p_lw_delta_mode_right);
// Draw new color, indicating triangle mode
// Triangle Right Button
VGA_box(TRIANGLE_RIGHT_X_START,
TRIANGLE_RIGHT_Y_START,
TRIANGLE_RIGHT_X_END,
TRIANGLE_RIGHT_Y_END,
TRIANGLE_MODE_COLOR);
}
else{
// Change to delta mode
*h2p_lw_delta_mode_right = !(*h2p_lw_delta_mode_right);
// Draw new color, indicating delta mode
// Triangle Right Button
VGA_box(TRIANGLE_RIGHT_X_START,
TRIANGLE_RIGHT_Y_START,
TRIANGLE_RIGHT_X_END,
TRIANGLE_RIGHT_Y_END,
TRIANGLE_RIGHT_COLOR);
}
// Reset the sliders
// Bottom Slider
// Draw over old position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
bottom_slider_x = INIT_SLIDER_BAR;
delta_right = 1.0;
*h2p_lw_delta_right = (float2fix(delta_right));
*h2p_lw_triangle_right = 188;
// Draw new position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
// Reset button
// Put sliders back into middle, starting position, reset deltas/triangle settings
if (cursor_x > RESET_X_START && cursor_x < RESET_X_END &&
cursor_y > RESET_Y_START && cursor_y < RESET_Y_END){
// Place into delta mode
*h2p_lw_delta_mode_right = 1;
// Draw new color, indicating delta mode
// Triangle Right Button
VGA_box(TRIANGLE_RIGHT_X_START,
TRIANGLE_RIGHT_Y_START,
TRIANGLE_RIGHT_X_END,
TRIANGLE_RIGHT_Y_END,
TRIANGLE_RIGHT_COLOR);
*h2p_lw_delta_mode_left = 1;
// Draw new color, indicating delta mode
// Triangle Left Button
VGA_box(TRIANGLE_LEFT_X_START,
TRIANGLE_LEFT_Y_START,
TRIANGLE_LEFT_X_END,
TRIANGLE_LEFT_Y_END,
TRIANGLE_LEFT_COLOR);
// Reset the sliders
// Top Slider
// Draw over old position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
top_slider_x = INIT_SLIDER_BAR;
delta_left = 1.0;
*h2p_lw_delta_left = (float2fix(delta_left));
*h2p_lw_triangle_left = 188;
// Draw new position
VGA_box(top_slider_x,
SLIDER_Y_INDENT,
top_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
// Bottom Slider
// Draw over old position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_COLOR);
// Update variables, delta
bottom_slider_x = INIT_SLIDER_BAR;
delta_right = 1.0;
*h2p_lw_delta_right = (float2fix(delta_right));
*h2p_lw_triangle_right = 188;
// Draw new position
VGA_box(bottom_slider_x,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET,
bottom_slider_x + SLIDER_BAR_WIDTH,
SLIDER_Y_INDENT + BOTTOM_SLIDER_Y_OFFSET + SLIDER_BUTTON_WIDTH,
SLIDER_BAR_COLOR);
}
if (*h2p_lw_delta_mode_left){
sprintf(left_delta_text, "%.5f\0", delta_left);
VGA_text(20, 21, delta_mode);
}
else{
sprintf(left_delta_text, "%.5f\0", 513.0*((float)(*h2p_lw_triangle_left))/(96000.0));
VGA_text(20, 21, triangle_mode);
}
VGA_text(36, 7, " \0");
VGA_text(36, 7, left_delta_text);
if (*h2p_lw_delta_mode_right){
sprintf(right_delta_text, "%.5f\0", delta_right);
VGA_text(45, 21, delta_mode);
}
else{
sprintf(right_delta_text, "%.5f\0", 513.0*((float)(*h2p_lw_triangle_right))/(96000.0));
VGA_text(45, 21, triangle_mode);
}
VGA_text(36, 11, " \0");
VGA_text(36, 11, right_delta_text);
}
} // end mouse checks
}
close(fd);
close(fmouse);
return 0;
}
char VGA_PIXEL_GET_COLOR(int x, int y) {
char* pixel_ptr;
pixel_ptr = (char*)vga_pixel_ptr + ((y)<<10) + (x);
return *(char*)pixel_ptr;
}
/****************************************************************************************
* Draw a filled rectangle on the VGA monitor
****************************************************************************************/
#define SWAP(X,Y) do{int temp=X; X=Y; Y=temp;}while(0)
// When mode is 0, draw the pixel with the given color
// When mode is non zero, draw the pixel with the current life colors
void VGA_box(int x1, int y1, int x2, int y2, short pixel_color){
char* pixel_ptr;
int row, col;
/* check and fix box coordinates to be valid */
if (x1>639) x1 = 639;
if (y1>479) y1 = 479;
if (x2>639) x2 = 639;
if (y2>479) y2 = 479;
if (x1<0) x1 = 0;
if (y1<0) y1 = 0;
if (x2<0) x2 = 0;
if (y2<0) y2 = 0;
if (x1>x2) SWAP(x1,x2);
if (y1>y2) SWAP(y1,y2);
for (row = y1; row <= y2; row++){
for (col = x1; col <= x2; ++col){
//640x480
pixel_ptr = (char*)vga_pixel_ptr + (row<<10) + col;
// set pixel color
*(char*)pixel_ptr = pixel_color;
}
}
}
/****************************************************************************************
* Subroutine to send a string of text to the VGA monitor
****************************************************************************************/
void VGA_text(int x, int y, char * text_ptr){
volatile char * character_buffer = (char *) vga_char_ptr; // VGA character buffer
int offset;
/* assume that the text string fits on one line */
offset = (y << 7) + x;
while ( *(text_ptr) ){
// write to the character buffer
*(character_buffer + offset) = *(text_ptr);
++text_ptr;
++offset;
}
}
/****************************************************************************************
* Subroutine to clear text to the VGA monitor
****************************************************************************************/
void VGA_text_clear(){
volatile char* character_buffer = (char*) vga_char_ptr; // VGA character buffer
int offset, x, y;
for (x=0; x<70; x++){
for (y=0; y<50; y++){
// assume that the text string fits on one line
offset = (y << 7) + x;
// write to the character buffer
*(character_buffer + offset) = ' ';
}
}
}
/****************************************************************************************
* Draw a filled circle on the VGA monitor
****************************************************************************************/
void VGA_disc(int x, int y, int r, short pixel_color){
char* pixel_ptr;
int row, col, rsqr, xc, yc;
rsqr = r*r;
for (yc = -r; yc <= r; yc++){
for (xc = -r; xc <= r; xc++){
col = xc;
row = yc;
// add the r to make the edge smoother
if(col*col+row*row <= rsqr+r){
col += x; // add the center point
row += y; // add the center point
//check for valid 640x480
if (col>639) col = 639;
if (row>479) row = 479;
if (col<0) col = 0;
if (row<0) row = 0;
pixel_ptr = (char*)vga_pixel_ptr + (row<<10) + col;
// set pixel color
*(char*)pixel_ptr = pixel_color;
}
}
}
}
// =============================================
// VGA_line
// =============================================
// plot a line
// at x1,y1 to x2,y2 with color
// Code is from David Rodgers,
// "Procedural Elements of Computer Graphics",1985
void VGA_line(int x1, int y1, int x2, int y2, short c){
int e;
signed int dx,dy,j, temp;
signed int s1,s2, xchange;
signed int x,y;
char* pixel_ptr;
// check and fix line coordinates to be valid
if (x1>639) x1 = 639;
if (y1>479) y1 = 479;
if (x2>639) x2 = 639;
if (y2>479) y2 = 479;
if (x1<0) x1 = 0;
if (y1<0) y1 = 0;
if (x2<0) x2 = 0;
if (y2<0) y2 = 0;
x = x1;
y = y1;
//take absolute value
if (x2 < x1){
dx = x1 - x2;
s1 = -1;
}
else if (x2 == x1){
dx = 0;
s1 = 0;
}
else{
dx = x2 - x1;
s1 = 1;
}
if (y2 < y1){
dy = y1 - y2;
s2 = -1;
}
else if (y2 == y1){
dy = 0;
s2 = 0;
}
else{
dy = y2 - y1;
s2 = 1;
}
xchange = 0;
if (dy>dx){
temp = dx;
dx = dy;
dy = temp;
xchange = 1;
}
e = ((int)dy<<1) - dx;
for (j=0; j<=dx; j++){
//video_pt(x,y,c); //640x480
pixel_ptr = (char*)vga_pixel_ptr + (y<<10)+ x;
// set pixel color
*(char*)pixel_ptr = c;
if (e>=0){
if (xchange==1) x = x + s1;
else y = y + s2;
e = e - ((int)dx<<1);
}
if (xchange==1) y = y + s2;
else x = x + s1;
e = e + ((int)dy<<1);
}
}