radio95/rds95
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i wonder if i'll regret this

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kuba
2025-03-24 21:01:57 +01:00
parent 6781446c90
commit c1389e4f97
2 changed files with 4 additions and 3 deletions
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gen_wave.py
+3 -2
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@@ -7,6 +7,7 @@ if PLOT: import matplotlib.pyplot as plt
if FFT: import numpy as np # Import numpy for FFT if FFT: import numpy as np # Import numpy for FFT
DATA_RATE = 1187.5 DATA_RATE = 1187.5
SIZE_RATIO = 1
ratio = 16 ratio = 16
sample_rate = DATA_RATE*ratio sample_rate = DATA_RATE*ratio
@@ -84,10 +85,10 @@ def generate():
highest_idx = i highest_idx = i
middle = int((lowest_idx+highest_idx)/2) middle = int((lowest_idx+highest_idx)/2)
out = shapedSamples[middle-int(ratio):middle+int(ratio)] out = shapedSamples[middle-int(ratio*SIZE_RATIO):middle+int(ratio*SIZE_RATIO)]
out = [2 * (i - min(out)) / (max(out) - min(out)) - 1 for i in out] 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 max(out) > 1 or min(out) < -1: raise Exception("Clipped")
print(f"{len(out)=} {len(out)/sample_rate/2=} {1/DATA_RATE=}") print(f"{len(out)=} {len(out)/sample_rate=} {(len(out)/sample_rate)/(1/DATA_RATE)=} {1/DATA_RATE=}")
if PLOT: if PLOT:
# Plot the waveform # Plot the waveform
src/rds.h
+1 -1
View File
@@ -11,7 +11,7 @@
#define GROUP_LENGTH 4 #define GROUP_LENGTH 4
#define BITS_PER_GROUP (GROUP_LENGTH * (BLOCK_SIZE + POLY_DEG)) #define BITS_PER_GROUP (GROUP_LENGTH * (BLOCK_SIZE + POLY_DEG))
#define RDS_SAMPLE_RATE 19000 #define RDS_SAMPLE_RATE 19000
#define SAMPLES_PER_BIT 16 #define SAMPLES_PER_BIT 8 // ratio//2
#define FILTER_SIZE 32 #define FILTER_SIZE 32
#define SAMPLE_BUFFER_SIZE (SAMPLES_PER_BIT + FILTER_SIZE) #define SAMPLE_BUFFER_SIZE (SAMPLES_PER_BIT + FILTER_SIZE)