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ball_bounce_demo.c
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ball_bounce_demo.c
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/* Makes a spinning pattern on the display */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "i2c_lib.h"
#include "graphics_lib.h"
/* should make the device settable */
int ball_bounce_demo(int i2c_fd) {
int i;
double x,y,xadd,yadd;
unsigned char display_buffer[DISPLAY_LINES];
x=2.0, y=5.0;
xadd=1.2; yadd=0.8;
while(1) {
for(i=0;i<DISPLAY_LINES;i++) display_buffer[i]=0;
x+=xadd;
if (x<0.0) {
x=0.0;
xadd=-xadd;
}
if (x>7.0) {
x=7.0;
xadd=-xadd;
}
y+=yadd;
if (y<0.0) {
y=0.0;
yadd=-yadd;
}
if (y>7.0) {
y=7.0;
yadd=-yadd;
}
plotxy(display_buffer,(int)x,(int)y);
update_8x8_display_rotated(i2c_fd,HT16K33_ADDRESS0,
display_buffer,0,BROKEN);
usleep(100000);
}
return 0;
}
int main(int argc, char **argv) {
int result;
int i2c_fd;
i2c_fd=init_i2c("/dev/i2c-1");
if (i2c_fd < 0) {
fprintf(stderr,"Error opening device!\n");
return -1;
}
/* Init display */
if (init_display(i2c_fd,HT16K33_ADDRESS0,10)) {
fprintf(stderr,"Error opening display\n");
return -1;
}
result=ball_bounce_demo(i2c_fd);
return result;
}