int main(void) {
struct freedv *f;
short buf[FREEDV_NSAMPLES];
int nin, nout;
/* init all the drivers for various peripherals */
sm1000_leds_switches_init();
dac_open(4*DAC_BUF_SZ);
adc_open();
f = freedv_open(FREEDV_MODE_1600);
/* LEDs into a known state */
led_pwr(1); led_ptt(0); led_rt(0); led_err(0);
/*
TODO:
[ ] UT analog interfaces from file IO
[ ] UTs for simultaneous tx & rx on analog interfaces
[ ] measure CPU load of various parts with a blinky
[ ] detect program assert type errors with a blinky
[ ] timer tick function to measure 10ms-ish type times
[ ] switch debouncing?
[ ] light led with bit errors
*/
while(1) {
if(switch_ptt()) {
/* Transmit -------------------------------------------------------------------------*/
/* ADC2 is the SM1000 microphone, DAC1 is the modulator signal we send to radio tx */
if (adc2_read(buf, FREEDV_NSAMPLES) == FREEDV_NSAMPLES) {
freedv_tx(f, buf, buf);
dac1_write(buf, FREEDV_NSAMPLES);
led_ptt(1); led_rt(0); led_err(0);
}
}
else {
/* Receive --------------------------------------------------------------------------*/
/* ADC1 is the demod in signal from the radio rx, DAC2 is the SM1000 speaker */
nin = freedv_nin(f);
f->total_bit_errors = 0;
if (adc1_read(buf, nin) == nin) {
nout = freedv_rx(f, buf, buf);
dac2_write(buf, nout);
led_ptt(0); led_rt(f->fdmdv_stats.sync); led_err(f->total_bit_errors);
}
}
} /* while(1) ... */
}
int main(void) {
struct freedv *f;
short adc16k[FDMDV_OS_TAPS_16K+FREEDV_NSAMPLES_16K];
short dac16k[FREEDV_NSAMPLES_16K];
short adc8k[FREEDV_NSAMPLES];
short dac8k[FDMDV_OS_TAPS_8K+FREEDV_NSAMPLES];
SWITCH_STATE ss;
int nin, nout, i;
/* init all the drivers for various peripherals */
SysTick_Config(SystemCoreClock/168000); /* 1 kHz SysTick */
sm1000_leds_switches_init();
dac_open(4*DAC_BUF_SZ);
adc_open(4*ADC_BUF_SZ);
f = freedv_open(FREEDV_MODE_1600);
/* put outputs into a known state */
led_pwr(1); led_ptt(0); led_rt(0); led_err(0); not_cptt(1);
/* clear filter memories */
for(i=0; i<FDMDV_OS_TAPS_16K; i++)
adc16k[i] = 0.0;
for(i=0; i<FDMDV_OS_TAPS_8K; i++)
dac8k[i] = 0.0;
ss.state = SS_IDLE;
ss.mode = ANALOG;
while(1) {
iterate_select_state_machine(&ss);
if (switch_ptt()) {
/* Transmit -------------------------------------------------------------------------*/
/* ADC2 is the SM1000 microphone, DAC1 is the modulator signal we send to radio tx */
if (adc2_read(&adc16k[FDMDV_OS_TAPS_16K], FREEDV_NSAMPLES_16K) == 0) {
GPIOE->ODR = (1 << 3);
fdmdv_16_to_8_short(adc8k, &adc16k[FDMDV_OS_TAPS_16K], FREEDV_NSAMPLES);
if (ss.mode == ANALOG) {
for(i=0; i<FREEDV_NSAMPLES; i++)
dac8k[FDMDV_OS_TAPS_8K+i] = adc8k[i];
fdmdv_8_to_16_short(dac16k, &dac8k[FDMDV_OS_TAPS_8K], FREEDV_NSAMPLES);
dac1_write(dac16k, FREEDV_NSAMPLES_16K);
}
if (ss.mode == DV) {
freedv_tx(f, &dac8k[FDMDV_OS_TAPS_8K], adc8k);
fdmdv_8_to_16_short(dac16k, &dac8k[FDMDV_OS_TAPS_8K], FREEDV_NSAMPLES);
dac1_write(dac16k, FREEDV_NSAMPLES_16K);
}
if (ss.mode == TONE) {
while(dac1_write((short*)aSine, SINE_SAMPLES) == 0);
}
led_ptt(1); led_rt(0); led_err(0); not_cptt(0);
GPIOE->ODR &= ~(1 << 3);
}
}
else {
/* Receive --------------------------------------------------------------------------*/
not_cptt(1); led_ptt(0);
/* ADC1 is the demod in signal from the radio rx, DAC2 is the SM1000 speaker */
if (ss.mode == ANALOG) {
/* force analog bypass when select down */
if (adc1_read(&adc16k[FDMDV_OS_TAPS_16K], FREEDV_NSAMPLES_16K) == 0) {
fdmdv_16_to_8_short(adc8k, &adc16k[FDMDV_OS_TAPS_16K], FREEDV_NSAMPLES);
for(i=0; i<FREEDV_NSAMPLES; i++)
dac8k[FDMDV_OS_TAPS_8K+i] = adc8k[i];
fdmdv_8_to_16_short(dac16k, &dac8k[FDMDV_OS_TAPS_8K], FREEDV_NSAMPLES);
dac2_write(dac16k, FREEDV_NSAMPLES_16K);
led_rt(0); led_err(0);
}
}
else {
/* regular DV mode */
nin = freedv_nin(f);
nout = nin;
f->total_bit_errors = 0;
if (adc1_read(&adc16k[FDMDV_OS_TAPS_16K], 2*nin) == 0) {
GPIOE->ODR = (1 << 3);
fdmdv_16_to_8_short(adc8k, &adc16k[FDMDV_OS_TAPS_16K], nin);
nout = freedv_rx(f, &dac8k[FDMDV_OS_TAPS_8K], adc8k);
fdmdv_8_to_16_short(dac16k, &dac8k[FDMDV_OS_TAPS_8K], nout);
dac2_write(dac16k, 2*nout);
led_rt(f->fdmdv_stats.sync); led_err(f->total_bit_errors);
GPIOE->ODR &= ~(1 << 3);
}
}
}
} /* while(1) ... */
}