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add ascii cmd output

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KubaPro010
2025-03-16 18:33:53 +01:00
parent e0422edec4
commit 02b713624e
3 changed files with 100 additions and 155 deletions
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109
gen_wave_original.py
View File

@@ -1,109 +0,0 @@
PLOT = True
FFT = PLOT and True
import math
import io, os
if PLOT: import matplotlib.pyplot as plt
if FFT: import numpy as np # Import numpy for FFT
sample_rate = 190000
# this is modified from ChristopheJacquet's pydemod
def rrcosfilter(NumSamples):
T_delta = 1/float(sample_rate)
sample_num = list(range(NumSamples))
h_rrc = [0.0] * NumSamples
SymbolPeriod = 1/(2*1187.5)
for x in sample_num:
t = (x-NumSamples/2)*T_delta
if t == 0.0:
h_rrc[x] = 1.0 - 1 + (4/math.pi)
elif t == SymbolPeriod/4:
h_rrc[x] = (1/math.sqrt(2))*(((1+2/math.pi)* \
(math.sin(math.pi/4))) + ((1-2/math.pi)*(math.cos(math.pi/4))))
elif t == -SymbolPeriod/4:
h_rrc[x] = (1/math.sqrt(2))*(((1+2/math.pi)* \
(math.sin(math.pi/4))) + ((1-2/math.pi)*(math.cos(math.pi/4))))
else:
h_rrc[x] = (4*(t/SymbolPeriod)*math.cos(math.pi*t*2/SymbolPeriod))/ \
(math.pi*t*(1-(4*t/SymbolPeriod)*(4*t/SymbolPeriod))/SymbolPeriod)
return h_rrc
def convolve(a, b):
out = [0] * (len(a) + len(b) - 1)
for i in range(len(a)):
for j in range(len(b)):
out[i+j] += a[i] * b[j]
return out
PATH = os.path.dirname(os.path.abspath(__file__))
outc = io.open(f"{PATH}/src/waveforms.c", mode="w", encoding="utf8")
outh = io.open(f"{PATH}/src/waveforms.h", mode="w", encoding="utf8")
header = u"""
/* This file was automatically generated by "gen_wave.py".
(C) 2014 Christophe Jacquet.
(C) 2023 Anthony96922.
(C) 2025 kuba201.
Released under the GNU GPL v3 license.
*/
"""
outc.write(header)
outh.write(header)
def generate():
offset = 760
count = 7
l = int(sample_rate / 1187.5) // 2
if count*l > l*16: raise Exception("Sample rate too small")
print(f"{offset=} {count=} {l=}")
sample = [0.0] * (count*l)
sample[l] = 1
sample[2*l] = -1
sf = rrcosfilter(l*16)
shapedSamples = convolve(sample, sf)
out = shapedSamples[offset-l*count:offset+l*count]
out = [2 * (i - min(out)) / (max(out) - min(out)) - 1 for i in out]
if max(out) > 1 or min(out) < -1: raise Exception("Clipped")
if PLOT:
# Plot the waveform
plt.plot(out, label="out")
plt.legend()
plt.grid(True)
plt.show()
if FFT:
# Compute the FFT of the waveform
N = len(out)
fft_out = np.fft.fft(out)
fft_freqs = np.fft.fftfreq(N, d=1/sample_rate)
# Plot the magnitude of the FFT
plt.figure(figsize=(10, 6))
plt.plot(fft_freqs[:N//2], np.abs(fft_out)[:N//2]) # Plot only the positive frequencies
plt.xlim(0,1187.5*3)
plt.title("FFT of the waveform")
plt.xlabel("Frequency (Hz)")
plt.ylabel("Magnitude")
plt.grid(True)
plt.show()
# outc.write(u"float waveform_biphase[{size}] = {{{values}}};\n\n".format(
# values = u", ".join(map(str, out)),
# size = len(out)))
# outh.write(u"extern float waveform_biphase[{size}];\n".format(size=len(out)))
generate()
outc.close()
outh.close()

145
src/ascii_cmd.c
View File

@@ -8,16 +8,17 @@
typedef struct {
const char *cmd;
void (*handler)(char *arg, RDSModulator* mod);
void (*handler)(char *arg, RDSModulator* mod, char* output);
uint8_t cmd_length;
} command_handler_t;
static void handle_ptyn(char *arg, RDSModulator* mod) {
static void handle_ptyn(char *arg, RDSModulator* mod, char* output) {
arg[PTYN_LENGTH] = 0;
set_rds_ptyn(mod->enc, xlat(arg));
strcpy(output, "+\0");
}
static void handle_afch(char *arg, RDSModulator* mod) {
static void handle_afch(char *arg, RDSModulator* mod, char* output) {
if(arg[0] == '\0') {
memset(&(mod->enc->data[mod->enc->program].af), 0, sizeof(mod->enc->data[mod->enc->program].af));
return;
@@ -51,92 +52,113 @@ static void handle_afch(char *arg, RDSModulator* mod) {
}
memcpy(&(mod->enc->data[mod->enc->program].af), &new_af, sizeof(mod->enc->data[mod->enc->program].af));
strcpy(output, "+\0");
}
static void handle_tps(char *arg, RDSModulator* mod) {
static void handle_tps(char *arg, RDSModulator* mod, char* output) {
arg[PS_LENGTH * 2] = 0;
set_rds_tps(mod->enc, xlat(arg));
strcpy(output, "+\0");
}
static void handle_rt1(char *arg, RDSModulator* mod) {
static void handle_rt1(char *arg, RDSModulator* mod, char* output) {
arg[RT_LENGTH * 2] = 0;
set_rds_rt1(mod->enc, xlat(arg));
strcpy(output, "+\0");
}
static void handle_pty(char *arg, RDSModulator* mod) {
static void handle_pty(char *arg, RDSModulator* mod, char* output) {
arg[2] = 0;
mod->enc->data[mod->enc->program].pty = strtoul((char *)arg, NULL, 10);
strcpy(output, "+\0");
}
static void handle_ecc(char *arg, RDSModulator* mod) {
static void handle_ecc(char *arg, RDSModulator* mod, char* output) {
arg[2] = 0;
mod->enc->data[mod->enc->program].ecc = strtoul((char *)arg, NULL, 16);
strcpy(output, "+\0");
}
static void handle_lic(char *arg, RDSModulator* mod) {
static void handle_lic(char *arg, RDSModulator* mod, char* output) {
arg[3] = 0;
mod->enc->data[mod->enc->program].lic = strtoul((char *)arg, NULL, 16);
strcpy(output, "+\0");
}
static void handle_rtp(char *arg, RDSModulator* mod) {
static void handle_rtp(char *arg, RDSModulator* mod, char* output) {
uint8_t tags[6];
if (sscanf((char *)arg, "%hhu,%hhu,%hhu,%hhu,%hhu,%hhu", &tags[0], &tags[1], &tags[2], &tags[3], &tags[4], &tags[5]) == 6) {
set_rds_rtplus_tags(mod->enc, tags);
strcpy(output, "+\0");
} else {
strcpy(output, "-\0");
}
}
static void handle_lps(char *arg, RDSModulator* mod) {
static void handle_lps(char *arg, RDSModulator* mod, char* output) {
arg[LPS_LENGTH] = 0;
set_rds_lps(mod->enc, arg);
strcpy(output, "+\0");
}
static void handle_pin(char *arg, RDSModulator* mod) {
static void handle_pin(char *arg, RDSModulator* mod, char* output) {
uint8_t pin[3];
if (sscanf((char *)arg, "%hhu,%hhu,%hhu", &pin[0], &pin[1], &pin[2]) == 3) {
for (int i = 0; i < 3; i++) {
mod->enc->data[mod->enc->program].pin[i+1] = pin[i];
}
strcpy(output, "+\0");
} else {
strcpy(output, "-\0");
}
}
static void handle_ps(char *arg, RDSModulator* mod) {
static void handle_ps(char *arg, RDSModulator* mod, char* output) {
arg[PS_LENGTH * 2] = 0;
set_rds_ps(mod->enc, xlat(arg));
strcpy(output, "+\0");
}
static void handle_ct(char *arg, RDSModulator* mod) {
static void handle_ct(char *arg, RDSModulator* mod, char* output) {
arg[2] = 1;
mod->enc->data[mod->enc->program].ct = arg[0];
strcpy(output, "+\0");
}
static void handle_di(char *arg, RDSModulator* mod) {
static void handle_di(char *arg, RDSModulator* mod, char* output) {
arg[2] = 0;
mod->enc->data[mod->enc->program].di = arg[0];
strcpy(output, "+\0");
}
static void handle_tp(char *arg, RDSModulator* mod) {
static void handle_tp(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].tp = arg[0];
strcpy(output, "+\0");
}
static void handle_ta(char *arg, RDSModulator* mod) {
static void handle_ta(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].ta = arg[0];
strcpy(output, "+\0");
}
static void handle_ms(char *arg, RDSModulator* mod) {
static void handle_ms(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].ms = arg[0];
strcpy(output, "+\0");
}
static void handle_pi(char *arg, RDSModulator* mod) {
static void handle_pi(char *arg, RDSModulator* mod, char* output) {
arg[4] = 0;
mod->enc->data[mod->enc->program].pi = strtoul((char *)arg, NULL, 16);
strcpy(output, "+\0");
}
static void handle_af(char *arg, RDSModulator* mod) {
static void handle_af(char *arg, RDSModulator* mod, char* output) {
if (arg[0] == 'A' || arg[0] == 'B') {
strcpy(output, "-\0");
return;
}
if(arg[0] == '\0') {
@@ -169,9 +191,10 @@ static void handle_af(char *arg, RDSModulator* mod) {
}
memcpy(&(mod->enc->data[mod->enc->program].af), &new_af, sizeof(mod->enc[mod->enc->program].data->af));
strcpy(output, "+\0");
}
static void handle_g(char *arg, RDSModulator* mod) {
static void handle_g(char *arg, RDSModulator* mod, char* output) {
uint16_t blocks[3];
int count = sscanf((char *)arg, "%4hx%4hx%4hx", &blocks[0], &blocks[1], &blocks[2]);
if (count == 3) {
@@ -179,49 +202,63 @@ static void handle_g(char *arg, RDSModulator* mod) {
mod->enc->state[mod->enc->program].custom_group[1] = blocks[0];
mod->enc->state[mod->enc->program].custom_group[2] = blocks[1];
mod->enc->state[mod->enc->program].custom_group[3] = blocks[2];
strcpy(output, "+\0");
} else {
strcpy(output, "-\0");
}
}
static void handle_pinen(char *arg, RDSModulator* mod) {
static void handle_pinen(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].pin[0] = arg[0];
strcpy(output, "+\0");
}
static void handle_rt1en(char *arg, RDSModulator* mod) {
static void handle_rt1en(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].rt1_enabled = arg[0];
strcpy(output, "+\0");
}
static void handle_ptynen(char *arg, RDSModulator* mod) {
static void handle_ptynen(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].ptyn_enabled = strtoul((char *)arg, NULL, 10);
strcpy(output, "+\0");
}
static void handle_rtprun(char *arg, RDSModulator* mod) {
static void handle_rtprun(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
set_rds_rtplus_flags(mod->enc, strtoul((char *)arg, NULL, 10));
strcpy(output, "+\0");
}
static void handle_eccen(char *arg, RDSModulator* mod) {
static void handle_eccen(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].ecclic_enabled = arg[0];
strcpy(output, "+\0");
}
static void handle_shortrt(char *arg, RDSModulator* mod) {
static void handle_shortrt(char *arg, RDSModulator* mod, char* output) {
arg[1] = 0;
mod->enc->data[mod->enc->program].shortrt = arg[0];
strcpy(output, "+\0");
}
static void handle_program(char *arg, RDSModulator* mod) {
static void handle_program(char *arg, RDSModulator* mod, char* output) {
int16_t program = strtol((char *)arg, NULL, 10)-1;
if(program == '\0') {
strcpy(output, "-\0");
return;
}
if(program >= PROGRAMS) program = (PROGRAMS-1);
if(program < 0) program = 0;
mod->enc->data[mod->enc->program].ta = 0;
mod->enc->data[(uint8_t)program].ta = 0;
mod->enc->program = (uint8_t)program;
strcpy(output, "+\0");
}
static void handle_grpseq(char *arg, RDSModulator* mod) {
static void handle_grpseq(char *arg, RDSModulator* mod, char* output) {
if (arg[0] == '\0') {
memset(&(mod->enc->data[mod->enc->program].grp_sqc), 0, 24);
memcpy(&(mod->enc->data[mod->enc->program].grp_sqc), (char*)DEFAULT_GRPSQC, sizeof(DEFAULT_GRPSQC));
@@ -229,17 +266,21 @@ static void handle_grpseq(char *arg, RDSModulator* mod) {
memset(&(mod->enc->data[mod->enc->program].grp_sqc), 0, 24);
memcpy(&(mod->enc->data[mod->enc->program].grp_sqc), arg, 24);
}
strcpy(output, "+\0");
}
static void handle_level(char *arg, RDSModulator* mod) {
mod->params.level = strtoul((char *)arg, NULL, 10)/255.0f;
static void handle_level(char *arg, RDSModulator* mod, char* output) {
mod->params.level = strtoul((char *)arg, NULL, 10)/255.0f
strcpy(output, "+\0");
}
static void handle_rdsgen(char *arg, RDSModulator* mod) {
mod->params.rdsgen = strtoul((char *)arg, NULL, 10);
static void handle_rdsgen(char *arg, RDSModulator* mod, char* output) {
mod->params.rdsgen = strtoul((char *)arg, NULL, 10)
strcpy(output, "+\0");
}
static void handle_udg1(char *arg, RDSModulator* mod) {
static void handle_udg1(char *arg, RDSModulator* mod, char* output) {
uint8_t all_scanned = 1, bad_format = 0;
uint16_t blocks[8][3];
int sets = 0;
char *ptr = arg;
@@ -249,6 +290,7 @@ static void handle_udg1(char *arg, RDSModulator* mod) {
&blocks[sets][0], &blocks[sets][1], &blocks[sets][2]);
if (count != 3) {
all_scanned = 0;
break;
}
@@ -261,14 +303,19 @@ static void handle_udg1(char *arg, RDSModulator* mod) {
if (*ptr == ',') {
ptr++;
} else {
bad_format = 1;
break;
}
}
memcpy(&(mod->enc->data[mod->enc->program].udg1), &blocks, sets * sizeof(uint16_t[3]));
mod->enc->data[mod->enc->program].udg1_len = sets;
if(bad_format) strcpy(output, "-\0")
else if(all_scanned) strcpy(output, "+\0");
else strcpy(output, "/\0");
}
static void handle_udg2(char *arg, RDSModulator* mod) {
static void handle_udg2(char *arg, RDSModulator* mod, char* output) {
uint8_t all_scanned = 1, bad_format = 0;
uint16_t blocks[8][3];
int sets = 0;
char *ptr = arg;
@@ -278,6 +325,7 @@ static void handle_udg2(char *arg, RDSModulator* mod) {
&blocks[sets][0], &blocks[sets][1], &blocks[sets][2]);
if (count != 3) {
all_scanned = 0;
break;
}
@@ -290,17 +338,22 @@ static void handle_udg2(char *arg, RDSModulator* mod) {
if (*ptr == ',') {
ptr++;
} else {
bad_format = 1;
break;
}
}
memcpy(&(mod->enc->data[mod->enc->program].udg2), &blocks, sets * sizeof(uint16_t[3]));
mod->enc->data[mod->enc->program].udg2_len = sets;
if(bad_format) strcpy(output, "-\0")
else if(all_scanned) strcpy(output, "+\0");
else strcpy(output, "/\0");
}
static void handle_init(char *arg, RDSModulator* mod) {
static void handle_init(char *arg, RDSModulator* mod, char* output) {
(void)arg;
set_rds_defaults(mod->enc, mod->enc->program);
strcpy(output, "+\0");
}
static const command_handler_t commands_eq3[] = {
@@ -362,10 +415,10 @@ static const command_handler_t commands_exact[] = {
};
static bool process_command_table(const command_handler_t *table, int table_size,
char *cmd, char *arg, RDSModulator* mod) {
char *cmd, char *arg, char *output, RDSModulator* mod) {
for (int i = 0; i < table_size; i++) {
if (strcmp(cmd, (char *)table[i].cmd) == 0) {
table[i].handler(arg, mod);
table[i].handler(arg, mod, output);
return true;
}
}
@@ -373,7 +426,7 @@ static bool process_command_table(const command_handler_t *table, int table_size
}
void process_ascii_cmd(RDSModulator* mod, char *str) {
char *cmd, *arg;
char *cmd, *arg, *output;
uint16_t cmd_len = _strnlen((const char*)str, CTL_BUFFER_SIZE);
for(uint16_t i = 0; i < cmd_len; i++) {
@@ -384,7 +437,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
const command_handler_t *handler = &commands_exact[i];
if (cmd_len == handler->cmd_length &&
strcmp(str, (char *)handler->cmd) == 0) {
handler->handler(NULL, mod);
handler->handler(NULL, mod, output);
return;
}
}
@@ -405,7 +458,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq2,
sizeof(commands_eq2) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -416,7 +469,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq3,
sizeof(commands_eq3) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -427,7 +480,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq4,
sizeof(commands_eq4) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -438,7 +491,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq5,
sizeof(commands_eq5) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -449,7 +502,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq6,
sizeof(commands_eq6) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -460,7 +513,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq7,
sizeof(commands_eq7) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
@@ -471,7 +524,7 @@ void process_ascii_cmd(RDSModulator* mod, char *str) {
if (process_command_table(commands_eq8,
sizeof(commands_eq8) / sizeof(command_handler_t),
cmd, arg, mod)) {
cmd, arg, output, mod)) {
}
}
}

1
src/rds.h
View File

@@ -120,6 +120,7 @@ typedef struct {
uint8_t ptyn_enabled : 1;
char ptyn[PTYN_LENGTH];
uint8_t af_method : 1;
RDSAFs af;
uint8_t ct : 1;