void iterate_select_state_machine(SWITCH_STATE *ss) {
int next_state;
next_state = ss->state;
switch(ss->state) {
case SS_IDLE:
if (switch_select()) {
downTicker = FIFTY_MS;
next_state = SS_DEBOUNCE_DOWN;
}
break;
case SS_DEBOUNCE_DOWN:
if (downTicker == 0) {
ss->mode++;
if (ss->mode >= MAX_MODES)
ss->mode = 0;
next_state = SS_WAIT_BUTTON_UP;
}
break;
case SS_WAIT_BUTTON_UP:
if (switch_select() == 0) {
downTicker = FIFTY_MS;
next_state = SS_DEBOUNCE_UP;
}
break;
case SS_DEBOUNCE_UP:
if (downTicker == 0) {
next_state = SS_IDLE;
}
break;
}
ss->state = next_state;
}
int main(void) {
short buf[SINE_SAMPLES];
int i;
dac_open(4*DAC_BUF_SZ);
adc_open(ADC_FS_16KHZ, 4*ADC_BUF_SZ);
sm1000_leds_switches_init();
while (1) {
/* keep DAC FIFOs topped up */
while(adc2_read(buf, SINE_SAMPLES) == -1);
if (!switch_select()) {
for(i=0; i<SINE_SAMPLES; i++)
buf[i] = aSine[i];
}
dac2_write(buf, SINE_SAMPLES);
}
}
