mirror of
https://github.com/richardghirst/PiBits.git
synced 2024-11-28 12:24:11 +01:00
Code to use an optical mouse as a scanner
This commit is contained in:
parent
1cee99150d
commit
8381e67ec2
6
MouseScan/Makefile
Normal file
6
MouseScan/Makefile
Normal file
@ -0,0 +1,6 @@
|
||||
all: MouseDump MouseScan
|
||||
|
||||
CFLAGS = -Wall -g -O2 `pkg-config gtkmm-3.0 --cflags --libs`
|
||||
|
||||
MouseScan: MouseScan.o
|
||||
$(CC) -o $@ $^ -lm `pkg-config gtkmm-3.0 --cflags --libs`
|
217
MouseScan/MouseDump.c
Normal file
217
MouseScan/MouseDump.c
Normal file
@ -0,0 +1,217 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdint.h>
|
||||
#include <signal.h>
|
||||
#include <time.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/mman.h>
|
||||
|
||||
#define GPIO_BASE 0x20200000
|
||||
#define GPIO_LEN 0x100
|
||||
|
||||
#define GPIO_FSEL0 (0x00/4)
|
||||
#define GPIO_SET0 (0x1c/4)
|
||||
#define GPIO_CLR0 (0x28/4)
|
||||
#define GPIO_LEV0 (0x34/4)
|
||||
#define GPIO_PULLEN (0x94/4)
|
||||
#define GPIO_PULLCLK (0x98/4)
|
||||
|
||||
#define GPIO_MODE_IN 0
|
||||
#define GPIO_MODE_OUT 1
|
||||
|
||||
#define CLK_PIN 4
|
||||
#define DATA_PIN 17
|
||||
|
||||
|
||||
static volatile uint32_t *gpio_reg;
|
||||
|
||||
//static int verbose = 1;
|
||||
|
||||
static void
|
||||
udelay(int us)
|
||||
{
|
||||
struct timespec ts = { 0, us * 1000 };
|
||||
|
||||
if (us == 1) {
|
||||
volatile uint32_t x = 0;
|
||||
int i;
|
||||
for (i = 0; i < 30; i++)
|
||||
x += gpio_reg[0];
|
||||
}
|
||||
nanosleep(&ts, NULL);
|
||||
}
|
||||
|
||||
static void
|
||||
fatal(char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
static void *
|
||||
map_peripheral(uint32_t base, uint32_t len)
|
||||
{
|
||||
int fd = open("/dev/mem", O_RDWR);
|
||||
void * vaddr;
|
||||
|
||||
if (fd < 0)
|
||||
fatal("Failed to open /dev/mem: %m\n");
|
||||
vaddr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, base);
|
||||
if (vaddr == MAP_FAILED)
|
||||
fatal("Failed to map peripheral at 0x%08x: %m\n", base);
|
||||
close(fd);
|
||||
|
||||
return vaddr;
|
||||
}
|
||||
|
||||
static void
|
||||
gpio_set_mode(uint32_t pin, uint32_t mode)
|
||||
{
|
||||
uint32_t fsel = gpio_reg[GPIO_FSEL0 + pin/10];
|
||||
|
||||
fsel &= ~(7 << ((pin % 10) * 3));
|
||||
fsel |= mode << ((pin % 10) * 3);
|
||||
gpio_reg[GPIO_FSEL0 + pin/10] = fsel;
|
||||
//printf("Pin %d mode %d\n", pin, mode);
|
||||
}
|
||||
|
||||
static void
|
||||
gpio_set(int pin, int level)
|
||||
{
|
||||
if (level)
|
||||
gpio_reg[GPIO_SET0] = 1 << pin;
|
||||
else
|
||||
gpio_reg[GPIO_CLR0] = 1 << pin;
|
||||
//printf("Pin %d set to %d\n", pin, level ? 1 : 0);
|
||||
}
|
||||
|
||||
static int
|
||||
gpio_get(int pin)
|
||||
{
|
||||
int level = (gpio_reg[GPIO_LEV0] >> pin) & 1;
|
||||
//printf("Pin %d read as %d\n", pin, level);
|
||||
|
||||
return level;
|
||||
}
|
||||
|
||||
static uint8_t
|
||||
read_sensor(int reg)
|
||||
{
|
||||
uint8_t val = 0;
|
||||
int i;
|
||||
|
||||
gpio_set(DATA_PIN, 1);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_OUT);
|
||||
udelay(1);
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
gpio_set(DATA_PIN, reg & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
|
||||
udelay(100);
|
||||
|
||||
for (val = 0, i = 0; i < 8; i++) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
val <<= 1;
|
||||
val |= gpio_get(DATA_PIN);
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
static void
|
||||
write_sensor(int reg, int val)
|
||||
{
|
||||
int i;
|
||||
|
||||
reg |= 0x80;
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_OUT);
|
||||
gpio_set(DATA_PIN, reg & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set(DATA_PIN, val & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
int i;
|
||||
uint8_t v;
|
||||
uint8_t img[256];
|
||||
|
||||
gpio_reg = map_peripheral(GPIO_BASE, GPIO_LEN);
|
||||
|
||||
gpio_set(GPIO_PULLEN, 1);
|
||||
udelay(1);
|
||||
gpio_set(GPIO_PULLCLK, 1 << DATA_PIN);
|
||||
udelay(1);
|
||||
gpio_set(GPIO_PULLEN, 0);
|
||||
gpio_set(GPIO_PULLCLK, 0);
|
||||
|
||||
gpio_set(CLK_PIN, 1);
|
||||
gpio_set(DATA_PIN, 1);
|
||||
gpio_set_mode(CLK_PIN, GPIO_MODE_OUT);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
|
||||
sleep(1); // Ensure we're synchronized
|
||||
|
||||
write_sensor(0x0a,0x80);
|
||||
udelay(1000);
|
||||
write_sensor(0x0a,0x01);
|
||||
udelay(1000);
|
||||
|
||||
printf("Product ID: %02x Revision: %02x\n", read_sensor(0), read_sensor(1));
|
||||
|
||||
write_sensor(0x0a, 0x09);
|
||||
for (i = 0; i < 256; i++) {
|
||||
if (read_sensor(0x0d) != i)
|
||||
printf("Error, expecting register %d\n", i);
|
||||
v = read_sensor(0x0c);
|
||||
if (v & 0xc0)
|
||||
printf("Bad value %02x\n", v);
|
||||
img[i] = v;
|
||||
}
|
||||
|
||||
for (i = 255; i >= 0; i--) {
|
||||
printf("%02x ", img[i]);
|
||||
if ((i & 0x0f) == 0)
|
||||
printf("\n");
|
||||
}
|
||||
printf("\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
410
MouseScan/MouseScan.c
Normal file
410
MouseScan/MouseScan.c
Normal file
@ -0,0 +1,410 @@
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/mman.h>
|
||||
#include <gtk/gtk.h>
|
||||
|
||||
/* Surface to store current scribbles */
|
||||
static cairo_surface_t *surface = NULL;
|
||||
|
||||
#define GPIO_BASE 0x20200000
|
||||
#define GPIO_LEN 0x100
|
||||
|
||||
#define GPIO_FSEL0 (0x00/4)
|
||||
#define GPIO_SET0 (0x1c/4)
|
||||
#define GPIO_CLR0 (0x28/4)
|
||||
#define GPIO_LEV0 (0x34/4)
|
||||
#define GPIO_PULLEN (0x94/4)
|
||||
#define GPIO_PULLCLK (0x98/4)
|
||||
|
||||
#define GPIO_MODE_IN 0
|
||||
#define GPIO_MODE_OUT 1
|
||||
|
||||
#define CLK_PIN 4
|
||||
#define DATA_PIN 17
|
||||
|
||||
static volatile uint32_t *gpio_reg;
|
||||
|
||||
//static int verbose = 1;
|
||||
|
||||
static float xscale = 0.60;
|
||||
static float yscale = 0.60;
|
||||
|
||||
int winsize = 1024;
|
||||
|
||||
static void
|
||||
udelay(int us)
|
||||
{
|
||||
struct timespec ts = { 0, us * 1000 };
|
||||
|
||||
if (us <= 100) {
|
||||
volatile uint32_t x = 0;
|
||||
int i;
|
||||
for (i = 0; i < 30*us; i++)
|
||||
x += gpio_reg[0];
|
||||
return;
|
||||
}
|
||||
nanosleep(&ts, NULL);
|
||||
}
|
||||
|
||||
static void
|
||||
fatal(char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
static void *
|
||||
map_peripheral(uint32_t base, uint32_t len)
|
||||
{
|
||||
int fd = open("/dev/mem", O_RDWR);
|
||||
void * vaddr;
|
||||
|
||||
if (fd < 0)
|
||||
fatal("Failed to open /dev/mem: %m\n");
|
||||
vaddr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, base);
|
||||
if (vaddr == MAP_FAILED)
|
||||
fatal("Failed to map peripheral at 0x%08x: %m\n", base);
|
||||
close(fd);
|
||||
|
||||
return vaddr;
|
||||
}
|
||||
|
||||
static void
|
||||
gpio_set_mode(uint32_t pin, uint32_t mode)
|
||||
{
|
||||
uint32_t fsel = gpio_reg[GPIO_FSEL0 + pin/10];
|
||||
|
||||
fsel &= ~(7 << ((pin % 10) * 3));
|
||||
fsel |= mode << ((pin % 10) * 3);
|
||||
gpio_reg[GPIO_FSEL0 + pin/10] = fsel;
|
||||
//printf("Pin %d mode %d\n", pin, mode);
|
||||
}
|
||||
|
||||
static void
|
||||
gpio_set(int pin, int level)
|
||||
{
|
||||
if (level)
|
||||
gpio_reg[GPIO_SET0] = 1 << pin;
|
||||
else
|
||||
gpio_reg[GPIO_CLR0] = 1 << pin;
|
||||
//printf("Pin %d set to %d\n", pin, level ? 1 : 0);
|
||||
}
|
||||
|
||||
static int
|
||||
gpio_get(int pin)
|
||||
{
|
||||
int level = (gpio_reg[GPIO_LEV0] >> pin) & 1;
|
||||
//printf("Pin %d read as %d\n", pin, level);
|
||||
|
||||
return level;
|
||||
}
|
||||
|
||||
static uint8_t
|
||||
read_sensor(int reg)
|
||||
{
|
||||
uint8_t val = 0;
|
||||
int i;
|
||||
|
||||
gpio_set(DATA_PIN, 1);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_OUT);
|
||||
udelay(1);
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
gpio_set(DATA_PIN, reg & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
|
||||
udelay(100);
|
||||
|
||||
for (val = 0, i = 0; i < 8; i++) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
val <<= 1;
|
||||
val |= gpio_get(DATA_PIN);
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
return val;
|
||||
}
|
||||
|
||||
static void
|
||||
write_sensor(int reg, int val)
|
||||
{
|
||||
int i;
|
||||
|
||||
reg |= 0x80;
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_OUT);
|
||||
gpio_set(DATA_PIN, reg & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
for (i = 0x80; i; i >>= 1) {
|
||||
gpio_set(CLK_PIN, 0);
|
||||
udelay(1);
|
||||
gpio_set(DATA_PIN, val & i);
|
||||
udelay(1);
|
||||
gpio_set(CLK_PIN, 1);
|
||||
udelay(1);
|
||||
}
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
}
|
||||
|
||||
static void
|
||||
init_sensor(void)
|
||||
{
|
||||
gpio_reg = map_peripheral(GPIO_BASE, GPIO_LEN);
|
||||
|
||||
gpio_set(GPIO_PULLEN, 1);
|
||||
udelay(1);
|
||||
gpio_set(GPIO_PULLCLK, 1 << DATA_PIN);
|
||||
udelay(1);
|
||||
gpio_set(GPIO_PULLEN, 0);
|
||||
gpio_set(GPIO_PULLCLK, 0);
|
||||
|
||||
gpio_set(CLK_PIN, 1);
|
||||
gpio_set(DATA_PIN, 1);
|
||||
gpio_set_mode(CLK_PIN, GPIO_MODE_OUT);
|
||||
gpio_set_mode(DATA_PIN, GPIO_MODE_IN);
|
||||
|
||||
sleep(1); // Ensure we're synchronized
|
||||
|
||||
write_sensor(0x0a,0x80);
|
||||
udelay(1000);
|
||||
write_sensor(0x0a,0x11);
|
||||
udelay(1000);
|
||||
|
||||
printf("Product ID: %02x Revision: %02x\n", read_sensor(0), read_sensor(1));
|
||||
}
|
||||
|
||||
int
|
||||
get_image(int *xoff, int *yoff, uint8_t *img)
|
||||
{
|
||||
int i;
|
||||
uint8_t v;
|
||||
int m, x, y;
|
||||
|
||||
m = read_sensor(2);
|
||||
x = (signed char)read_sensor(3);
|
||||
y = (signed char)read_sensor(4);
|
||||
printf("m=0x%02x, x=%d, y=%d\n", m, x, y);
|
||||
*xoff = x;
|
||||
*yoff = y;
|
||||
|
||||
write_sensor(0x0a, 0x19);
|
||||
for (i = 0; i < 256; i++) {
|
||||
// if (read_sensor(0x0d) != i)
|
||||
// printf("Error, expecting register %d\n", i);
|
||||
v = read_sensor(0x0c);
|
||||
img[i] = v;
|
||||
if (v & 0xc0) {
|
||||
// printf("Bad value %02x\n", v);
|
||||
i--;
|
||||
}
|
||||
}
|
||||
write_sensor(0x0a, 0x11);
|
||||
|
||||
#if 0
|
||||
for (i = 255; i >= 0; i--) {
|
||||
printf("%02x ", img[i]);
|
||||
if ((i & 0x0f) == 0)
|
||||
printf("\n");
|
||||
}
|
||||
printf("\n");
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define SZ 1
|
||||
|
||||
/* Draw a rectangle on the surface at the given position */
|
||||
static void
|
||||
draw_image (GtkWidget *widget)
|
||||
{
|
||||
cairo_t *cr;
|
||||
uint8_t img[256];
|
||||
int r, c, xoff, yoff;
|
||||
static float x, y;
|
||||
|
||||
get_image(&xoff, &yoff, img);
|
||||
|
||||
x += (float)xoff * xscale;
|
||||
y -= (float)yoff * yscale;
|
||||
if (x < 0)
|
||||
x = 0;
|
||||
if (x > winsize - 17)
|
||||
x = winsize - 17;
|
||||
if (y < 0)
|
||||
y = 0;
|
||||
if (y > winsize - 17)
|
||||
y = winsize - 17;
|
||||
|
||||
//x=0; y=0;
|
||||
/* Paint to the surface, where we store our state */
|
||||
cr = cairo_create (surface);
|
||||
|
||||
for (r = 0; r < 16; r++) {
|
||||
for (c = 0; c < 16; c++) {
|
||||
cairo_set_source_rgb (cr, (double)(img[(240-r*16) + 15 - c])/(double)64, 0, 0);
|
||||
cairo_rectangle (cr, (r+x)*SZ, (c+y)*SZ, SZ, SZ);
|
||||
cairo_fill (cr);
|
||||
}
|
||||
}
|
||||
|
||||
cairo_destroy (cr);
|
||||
|
||||
/* Now invalidate the affected region of the drawing area. */
|
||||
gtk_widget_queue_draw_area (widget, x*SZ, y*SZ, 16*SZ, 16*SZ);
|
||||
}
|
||||
|
||||
static void
|
||||
clear_surface (void)
|
||||
{
|
||||
cairo_t *cr;
|
||||
|
||||
cr = cairo_create (surface);
|
||||
|
||||
cairo_set_source_rgb (cr, 1, 1, 1);
|
||||
cairo_paint (cr);
|
||||
|
||||
cairo_destroy (cr);
|
||||
}
|
||||
|
||||
/* Create a new surface of the appropriate size to store our scribbles */
|
||||
static gboolean
|
||||
configure_event_cb (GtkWidget *widget,
|
||||
GdkEventConfigure *event,
|
||||
gpointer data)
|
||||
{
|
||||
if (surface)
|
||||
cairo_surface_destroy (surface);
|
||||
|
||||
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
|
||||
CAIRO_CONTENT_COLOR,
|
||||
gtk_widget_get_allocated_width (widget),
|
||||
gtk_widget_get_allocated_height (widget));
|
||||
|
||||
/* Initialize the surface to white */
|
||||
clear_surface ();
|
||||
|
||||
draw_image(widget);
|
||||
|
||||
/* We've handled the configure event, no need for further processing. */
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Redraw the screen from the surface. Note that the ::draw
|
||||
* signal receives a ready-to-be-used cairo_t that is already
|
||||
* clipped to only draw the exposed areas of the widget
|
||||
*/
|
||||
static gboolean
|
||||
draw_cb (GtkWidget *widget,
|
||||
cairo_t *cr,
|
||||
gpointer data)
|
||||
{
|
||||
cairo_set_source_surface (cr, surface, 0, 0);
|
||||
cairo_rectangle (cr, 3, 3, 6, 6);
|
||||
cairo_fill (cr);
|
||||
cairo_paint (cr);
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static void
|
||||
close_window (void)
|
||||
{
|
||||
if (surface)
|
||||
cairo_surface_destroy (surface);
|
||||
|
||||
gtk_main_quit ();
|
||||
}
|
||||
|
||||
static gboolean
|
||||
time_handler(GtkWidget *widget)
|
||||
{
|
||||
static volatile int processing;
|
||||
static volatile int ticker;
|
||||
|
||||
if (processing) {
|
||||
;
|
||||
} else if (ticker > 0) {
|
||||
ticker--;
|
||||
} else {
|
||||
processing = 1;
|
||||
ticker = 1;
|
||||
draw_image(widget);
|
||||
processing = 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
int
|
||||
main (int argc,
|
||||
char *argv[])
|
||||
{
|
||||
GtkWidget *window;
|
||||
GtkWidget *frame;
|
||||
GtkWidget *da;
|
||||
|
||||
if (argc > 1) {
|
||||
sscanf(argv[1], "%f", &xscale);
|
||||
yscale = xscale;
|
||||
}
|
||||
if (argc > 2) {
|
||||
sscanf(argv[2], "%f", &yscale);
|
||||
}
|
||||
printf("Using scales %f, %f\n", xscale, yscale);
|
||||
|
||||
init_sensor();
|
||||
|
||||
gtk_init (&argc, &argv);
|
||||
|
||||
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
||||
gtk_window_set_title (GTK_WINDOW (window), "Drawing Area");
|
||||
|
||||
g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
|
||||
|
||||
gtk_container_set_border_width (GTK_CONTAINER (window), 8);
|
||||
|
||||
frame = gtk_frame_new (NULL);
|
||||
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
|
||||
gtk_container_add (GTK_CONTAINER (window), frame);
|
||||
|
||||
da = gtk_drawing_area_new ();
|
||||
/* set a minimum size */
|
||||
gtk_widget_set_size_request (da, winsize, winsize);
|
||||
|
||||
gtk_container_add (GTK_CONTAINER (frame), da);
|
||||
|
||||
/* Signals used to handle the backing surface */
|
||||
g_signal_connect (da, "draw",
|
||||
G_CALLBACK (draw_cb), NULL);
|
||||
g_signal_connect (da,"configure-event",
|
||||
G_CALLBACK (configure_event_cb), NULL);
|
||||
|
||||
g_timeout_add(2, (GSourceFunc) time_handler, (gpointer) da);
|
||||
gtk_widget_show_all (window);
|
||||
|
||||
gtk_main ();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
BIN
MouseScan/MouseScan.png
Normal file
BIN
MouseScan/MouseScan.png
Normal file
Binary file not shown.
After Width: | Height: | Size: 123 KiB |
28
MouseScan/README
Normal file
28
MouseScan/README
Normal file
@ -0,0 +1,28 @@
|
||||
Raspberry Pi and optical mouse ==> hand held scanner
|
||||
|
||||
This project emulates one you can find here:
|
||||
|
||||
http://spritesmods.com/?art=mouseeye
|
||||
|
||||
which converts a cheap optical mouse in to a hand held scanner.
|
||||
|
||||
It is very crude - for my mouse the scanner is 16x16 pixels and covers
|
||||
an area less that 1mm square, so you can imagine how hard it is to
|
||||
get an accurate and complete image.
|
||||
|
||||
You could improve things by using a better quality mouse, I think, because
|
||||
this real cheap one tends to forget to report movement every now and then.
|
||||
Also, if you were in to image processing you could stitch the 16x16 pixel
|
||||
images together much more accurately than by relying solely on the movement
|
||||
reported by the mouse itself.
|
||||
|
||||
Anyway I can across a link to the spritemod site and fancied giving a
|
||||
go. If you want to try, then go to the spritemod site for the details
|
||||
of how to connect to the mouse sensor. My mouse has an A2030 sensor
|
||||
which has the same interface as the ones mentioned on the spritemods
|
||||
page.
|
||||
|
||||
|
||||
Richard Hirst, January 2013
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user