int
input_do (game_t * g)
{
static SDL_Event ev;
if (SDL_PollEvent (&ev) != 0)
switch (ev.type)
{
case SDL_KEYDOWN:
if (ev.key.keysym.sym == 27)
return 0;
else if (ev.key.keysym.sym == SDLK_F10)
video_screenshot ();
else
state[ev.key.keysym.sym] = 1;
break;
case SDL_KEYUP:
state[ev.key.keysym.sym] = 0;
break;
}
if (state[SDLK_RIGHT])
g->player[PLAYER].X += 4.0 * timer_delta ();
if (state[SDLK_LEFT])
g->player[PLAYER].X -= 4.0 * timer_delta ();
return 1;
}
void spinner_step (void)
{
static int value;
static int step;
static const unsigned char rgch[]
= { '|', '/', '-', '\\', '|', '/', '-', '\\' } ;
unsigned v = timer_delta (0, timer_read ());
if (hook_spinner)
hook_spinner (v);
v = v/128;
if (v == value)
return;
value = v;
putchar ('\r');
putchar (rgch[step]);
step = (step + 1)%8;
}
void pulse_control_update(void)
// Update the servo seek position and velocity based on any received servo pulses.
{
int16_t pulse_position;
// Did we get a pulse?
if (pulse_flag)
{
// Ignore unusual pulse durations as a sanity check.
if ((pulse_duration > 500) && (pulse_duration < 2500))
{
// Convert the pulse duration to a pulse time.
pulse_position = pulse_duration - 998;
// Limit the pulse position.
if (pulse_position < MIN_POSITION) pulse_position = MIN_POSITION;
if (pulse_position > MAX_POSITION) pulse_position = MAX_POSITION;
// Apply a low pass filter to the pulse position.
pulse_position = filter_update(pulse_position, &filter_reg_pulse);
// Are we reversing the seek sense?
if (registers_read_byte(REG_REVERSE_SEEK) != 0)
{
// Yes. Update the seek position using reverse sense.
registers_write_word(REG_SEEK_POSITION_HI, REG_SEEK_POSITION_LO, (MAX_POSITION - pulse_position));
}
else
{
// No. Update the seek position using normal sense.
registers_write_word(REG_SEEK_POSITION_HI, REG_SEEK_POSITION_LO, pulse_position);
}
// The seek velocity will always be zero.
registers_write_word(REG_SEEK_VELOCITY_HI, REG_SEEK_VELOCITY_LO, 0);
// Make sure pwm is enabled.
pwm_enable();
// Update the pulse time used as a time stamp.
pulse_time = timer_get();
}
// Reset the pulse time flag.
pulse_flag = 0;
}
else
{
// If we haven't seen a pulse in .5 seconds disable pwm.
if (timer_delta(pulse_time) > 50)
{
// Disable pwm.
pwm_disable();
// Update the pulse time used as a time stamp.
pulse_time = timer_get();
}
}
return;
}
