void nx__abort(bool data, U32 pc, U32 cpsr) {
nx_interrupts_disable();
nx_display_auto_refresh(FALSE);
//nx_display_clear();
if (data) {
nx_display_string("Data");
} else {
nx_display_string("Prefetch");
}
nx_display_string(" abort\nPC: ");
nx_display_hex(pc);
nx_display_string("\nCPSR: ");
nx_display_hex(cpsr);
nx__lcd_sync_refresh();
while(1);
}
void main() {
/* We want to draw a moving ellipse, two arcs and two lines */
/* Declaring center point of the ellipse / arcs and points representing the lines */
point ellipse_c, q, r, s, t, u, v, w;
/* Initialize ellipse center position */
ellipse_c.x = 1;
ellipse_c.y = 1;
/* Initialize the first line position*/
q.x = 3;
q.y = 63;
s.x = 28;
s.y = 63;
/* Initialize the second line position */
r.x = 102;
r.y = 63;
t.x = 76;
t.y = 63;
/* initialize the triangle position */
u.x = 48;
u.y = 33;
v.x = 48;
v.y = 45;
w.x = 61;
w.y = 39;
/* Superior radius of the ellipse */
U8 sradius = 85;
/* Difference between the superior and inferior radius of the ellipse */
U8 delta = 73;
/* Offset angle for arcs rotation */
U32 offset_angle = 60;
/* Disable auto refresh of the screen, we want to control each frame */
nx_display_auto_refresh(FALSE);
/* Loop until the cancel button is pushed
Each loop iteration represent a frame composed of three steps*/
while (nx_avr_get_button() != BUTTON_CANCEL) {
/* Clear the screen */
nx_display_clear();
/* First step of the frame : calculate positions and parameters of shapes */
/* If the ellipse is in the first half of the screen,
make it follow a pseudo sinusoidal path */
if(ellipse_c.x < 53) {
ellipse_c.x ++;
delta--;
ellipse_c.y = (30 * sinf( ((float) ellipse_c.x) / 25) + 4);
}
/* If the ellipse have past the first third of the screen,
then start to move lines and rotate arcs */
if(ellipse_c.x > 34) {
if(ellipse_c.x < 49) {
q.x = (q.x) + 2;
s.x = (s.x) + 2;
r.x = (r.x) - 2;
t.x = (t.x) - 2;
offset_angle += ellipse_c.x;
}
else if(offset_angle > 5)
offset_angle -= 5;
}
/* Second step of the frame : draw shapes on the screen buffer*/
/* If the ellipse have past the first third of the screen,
draw moving arcs around and lines at the bottom of the screen */
if(ellipse_c.x > (34)) {
nx_display_arc(ellipse_c, 27, 45, offset_angle);
nx_display_arc(ellipse_c, 27, 45, (180 + offset_angle));
nx_display_line(q, s);
nx_display_line(r, t);
}
/* If the ellipse is at the middle of the screen,
write "NxOS on the screen */
if(ellipse_c.x > 52) {
nx_display_cursor_set_pos(7, 3);
nx_display_string("NxOS");
}
/* Just draw the ellipse, every frame */
nx_display_ellipse(ellipse_c, (sradius / 4), ((sradius - delta) / 3), (ellipse_c.x * 20) );
nx_display_triangle(u, v, w);
/* Last step of the frame : refresh the screen */
nx_display_refresh();
/* Wait a bit before next frame */
nx_systick_wait_ms(85);
}
/* Shutdown the brick */
nx_core_halt();
}