wip

tests/periph_pdm/main.c

@@ -69,37 +69,22 @@ int start_recording_cmd(int argc, char **argv)
     (void)argv;
     _main_thread_pid = thread_getpid();
 #if !PDM_DATA_PRINT_BINARY
-    //puts("PDM peripheral driver test\n");
 #endif
 
-/*     msg_t temp;
-    for (unsigned i = 0; i<1; i++)
-    {
-        msg_receive(&temp);
-    }  */
     for (unsigned repeat = 0; repeat < NEW_BUF_SIZE / PDM_BUF_SIZE; repeat++) {
         msg_t msg;
         msg_receive(&msg);
         int16_t *buf = (int16_t *)msg.content.ptr;
 #if PDM_DATA_PRINT_BINARY
         stdio_write((uint8_t *)buf, PDM_BUF_SIZE >> 2);
 #else
-    /*      printf("Start of the buffer\n");
-        for (unsigned idx = 0; idx < PDM_BUF_SIZE; ++idx) {
-            printf("%i\n", buf[idx]);
-            buf_size = idx;
-        }
-        printf("End of the buffer\n");
-        printf("%d\n", buf_size); */
-
         // Copy PDM_BUF_SIZE to NEW_BUF_SIZE repeatedly
         for (unsigned idx = 0; idx < PDM_BUF_SIZE; idx++) {
             new_buf[repeat*PDM_BUF_SIZE+idx] = buf[idx];
         }
 #endif
     }
     // Parse the new_buf
-    //pdm_stop();
     _main_thread_pid = KERNEL_PID_UNDEF;
     printf("Start of the new buffer\n");
     for (unsigned idx = 0; idx < NEW_BUF_SIZE ; idx++) {

tests/periph_pdm/larger_buff_size.py → tests/periph_pdm/testing_pdm_conversion.py

@@ -14,7 +14,7 @@
 str1 = "Start of the new buffer".encode('ascii')
 str2= "End of the new buffer".encode('ascii')
 
-start_index_buf = 0
+start_index_buf = 0    
 stop_index_buf = 0
 start_found = False
 buffer_number = 0
@@ -31,29 +31,24 @@
     value = line.strip()
     data[key] = value
     if line.find(str1) != -1:
-        #print("Start Recording")
         start_found = True
         start_index_buf = key
     if line.find(str2) != -1:
-
         if start_found:
             stop_index_buf = key
             buffer_number = stop_index_buf - start_index_buf - 2
             start = False
-            #print("Stop recording")
             break
     key +=1
 
-print(start_index_buf)
+print(start_index_buf)     
 print(stop_index_buf)
 print(buffer_number)
 ser.close()
 
 # Extract the data within the specified range
 data_to_plot = [int(data[i]) for i in range(start_index_buf+1, stop_index_buf)]
 data_to_bytes = [int(data[i]).to_bytes(2,byteorder="little",signed=True) for i in range(start_index_buf+1, stop_index_buf)]
-data_to_export = [(data[i]) for i in range(start_index_buf+1, stop_index_buf)]
-#print(data_to_bytes)
 
 # Save the data to 16-b file
 # Open a file in binary write mode
@@ -62,22 +57,6 @@
         # Write the binary data to the file
         f.write(binary_data)
 
-# Sample rate (Hz)
-sample_rate = 16000
-
-# Open a new wave file
-with wave.open("output_wave.wav", "w") as output_wave:
-    # Set parameters for the wave file
-    output_wave.setnchannels(1)  # Mono
-    output_wave.setsampwidth(2)  # 2 bytes per sample for 16-bit audio
-    output_wave.setframerate(sample_rate)
-
-    # Convert data_to_plot to numpy array
-    data_np = np.array(data_to_bytes)
-
-    # Convert data to bytes and write to the wave file
-    output_wave.writeframes(data_np)
-
 # Sample rate (Hz)
 samplerate = 16000
 length = 1
@@ -94,6 +73,7 @@
 # Convert to (little-endian) 16 bit integers.
 audio = (audio * (2 ** 15 - 1)).astype("<h")
 
+# Save the data as a wave format
 with wave.open("sound_new_buf.wav", "w") as f:
     # Mono Channel
     f.setnchannels(1)