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small docs

This commit is contained in:
KubaPro010 2023-10-14 20:05:10 +02:00
parent 6bb99d67a9
commit f3a0bc1c2f
1 changed files with 15 additions and 18 deletions
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33
src/pifmrds/pi_fm_rds.cpp
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@ -46,7 +46,7 @@ static volatile uint32_t *pad_reg;
#else
#error Unknown Raspberry Pi version (variable PI)
#endif
//i dunno it for pi 5, but rp1 is gonna steer the io: https://datasheets.raspberrypi.com/rp1/rp1-peripherals.pdf
#define SUBSIZE 512
#define DATA_SIZE 5000
#define PAD_LEN (0x40/4) //0x64
@ -111,7 +111,7 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
// Initialize the baseband generator
if(fm_mpx_open(audio_file, DATA_SIZE, raw, preemp, rawSampleRate, rawChannels) < 0) return 1;
// Initialize the RDS modulator
char myps[9] = {0};
set_rds_pi(pi);
@ -157,8 +157,8 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
control_pipe = NULL;
}
}
printf("Starting to transmit on %3.1f MHz.\n", carrier_freq/1e6);
float deviation_scale_factor;
@ -166,8 +166,8 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
{ // note samples are [-10:10]
deviation_scale_factor= 0.1 * (deviation ) ; // todo PPM
}
for (;;)
for (;;)
{
if(drds == 0) {
// Default (varying) PS
@ -184,24 +184,24 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
count++;
}
}
if(control_pipe && poll_control_pipe() == CONTROL_PIPE_PS_SET) {
varying_ps = 0;
}
if( fm_mpx_get_samples(data, drds) < 0 ) {
terminate(0);
}
data_len = DATA_SIZE;
for(int i=0;i< data_len;i++)
{
devfreq[i] = data[i]*deviation_scale_factor;
}
}
fmmod->SetFrequencySamples(devfreq,data_len);
}
}
return 0;
}
@ -227,11 +227,8 @@ int main(int argc, char **argv) {
double preemp = 50e-6; //eu
int deviation = 75000;
int alternative_freq[100] = {};
float ppm = 0;
int custom_deviation = 0;
// Parse command-line arguments
for(int i=1; i<argc; i++) {
char *arg = argv[i];
@ -286,7 +283,7 @@ int main(int argc, char **argv) {
deviation = 2500;
drds = 1;
custom_deviation = 2;
}
}
else {
deviation = atoi(param);
}
@ -334,7 +331,7 @@ int main(int argc, char **argv) {
printf("RDS is gonna be disabled for NFM, because you know, nothing will decode the rds from a nfm signal anyway\n");
}
alternative_freq[0] = af_size;
int FifoSize=DATA_SIZE*2;
int FifoSize=DATA_SIZE*2;
fmmod=new ngfmdmasync(carrier_freq,228000,14,FifoSize, false, gpiopin);
int errcode = tx(carrier_freq, audio_file, pi, ps, rt, ppm, control_pipe, pty, alternative_freq, raw, drds, preemp, power, rawSampleRate, rawChannels, deviation, ta, tp);
terminate(errcode);