Fix spelling errors

Fixed with:
codespell --ignore-words-list=dout,feets,fo,inout,ist,ot,parm,usng src --write-changes --interactive=2
and manual editing.

Author: dforsi

src/appserver.c

@@ -320,7 +320,7 @@ static void poll_timing_test (void)
  *
  *		data		- Should look something like this for incoming:
  *					*** CONNECTED to Station xxx\r
- *				  and ths for my request being accepted:
+ *				  and this for my request being accepted:
  *					*** CONNECTED With Station xxx\r
  *
  *		session_id	- Session id to be used in data transfer and

src/audio.c

@@ -821,7 +821,7 @@ static int poll_sndio (struct sio_hdl *hdl, int events)
 	  revents = sio_revents (hdl, pfds);
 	} while (!(revents & (events | POLLHUP)));
 
-	/* unrecoverable error occured */
+	/* unrecoverable error occurred */
 	if (revents & POLLHUP) {
 	  text_color_set(DW_COLOR_ERROR);
 	  dw_printf ("waited for %s, POLLHUP received\n", (events & POLLIN) ? "POLLIN" : "POLLOUT");

src/cm108.c

@@ -304,7 +304,7 @@ static void usage(void)
 	dw_printf ("which ones can be used for GPIO PTT.\n");
 #endif
 	dw_printf ("\n");
-	dw_printf ("Specify the HID device path to test the PTT fuction.\n");
+	dw_printf ("Specify the HID device path to test the PTT function.\n");
 	dw_printf ("Its state should change once per second.\n");
 #if __WIN32__
 	dw_printf ("You might need to quote the path depending on the command processor.\n");
@@ -854,7 +854,7 @@ void cm108_find_ptt (char *output_audio_device, char *ptt_device,  int ptt_devic
  *
  * Future:	For our initial implementation we are making the simplifying
  *		restriction of using only one GPIO pin per device and limit
- *		configuratin to PTT only.
+ *		configuration to PTT only.
  *		Longer term, we might want to have DCD, and maybe other
  *		controls thru the same chip.
  *		In this case, we would need to retain bit masks for each

src/decode_aprs.c

@@ -213,7 +213,7 @@ void decode_aprs (decode_aprs_t *A, packet_t pp, int quiet, int third_party)
 	  // This must not be strict because the addresses in third party payload doesn't
 	  // need to adhere to the AX.25 address format (i.e. 6 upper case alphanumeric.)
 	  // SSID can be 2 alphanumeric characters.
-	  // Addresses can include lower case, e.g. q contruct.
+	  // Addresses can include lower case, e.g. q construct.
 
 	  // e.g.  WR2X-2>APRS,WA1PLE-13*:}
 	  //		K1BOS-B>APOSB,TCPIP,WR2X-2*:@122015z4221.42ND07111.93W&/A=000000SharkRF openSPOT3 MMDVM446.025 MA/SW
@@ -1589,7 +1589,7 @@ static void aprs_message (decode_aprs_t *A, unsigned char *info, int ilen, int q
 	  char colon;			/* : */
 	  char message[256-1-9-1];	/* Officially up to 67 characters for message text. */
 					/* Relaxing seemingly arbitrary restriction here; it doesn't need to fit on a punched card. */
-					/* Wouldn't surprize me if others did not pay attention to the limit. */
+					/* Wouldn't surprise me if others did not pay attention to the limit. */
 					/* Optional { followed by 1-5 alphanumeric characters for message number */
 
 					/* If the first character is '?' it is a Directed Station Query. */

src/demod_9600.c

@@ -133,7 +133,7 @@ static inline float agc (float in, float fast_attack, float slow_decay, float *p
  *		upsample	- Factor to upsample the incoming stream.
  *				  After a lot of experimentation, I discovered that
  *				  it works better if the data is upsampled.
- *				  This reduces the jitter for PLL syncronization.
+ *				  This reduces the jitter for PLL synchronization.
  *
  *		baud		- Data rate in bits per second.
  *
@@ -244,7 +244,7 @@ void demod_9600_init (enum modem_t modem_type, int original_sample_rate, int ups
 // Here is the general idea.
 //
 // Suppose the input samples are 1 2 3 4 5 6 7 8 9 ...
-// Filter coefficents are a b c d e f g h i ...
+// Filter coefficients are a b c d e f g h i ...
 //
 // With original sampling rate, the filtering would involve multiplying and adding:
 //

src/demod_afsk.c

@@ -588,7 +588,7 @@ void demod_afsk_init (int samples_per_sec, int baud, int mark_freq,
  *
  * First, let's take a look at Track 1 of the TNC test CD.  Here the receiver
  * has a flat response.  We find the mark/space strength ratios very from 0.53 to 1.38
- * with a median of 0.81.  This in in line with expections because most
+ * with a median of 0.81.  This is in line with expectations because most
  * transmitters add pre-emphasis to boost the higher audio frequencies.
  * Track 2 should more closely resemble what comes out of the speaker on a typical
  * transceiver.  Here we see a ratio from 1.73 to 3.81 with a median of 2.48.
@@ -706,7 +706,7 @@ void demod_afsk_process_sample (int chan, int subchan, int sam, struct demodulat
 	      // Rather than trying to find the best threshold location, use multiple 
 	      // slicer thresholds in parallel.
 	      // The best slicing point will vary from packet to packet but should
-	      // remain abount the same or a given packet.
+	      // remain about the same for a given packet.
 
 	      // We are not performing the AGC step here but still want the envelope
 	      // for caluculating the confidence level (or quality) of the sample.

src/dns_sd_avahi.c

@@ -241,7 +241,7 @@ void dns_sd_announce (struct misc_config_s *mc)
         /* Allocate a new client */
         client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, client_callback, NULL, &error);
 
-        /* Check wether creating the client object succeeded */
+        /* Check whether creating the client object succeeded */
         if (!client) {
             text_color_set(DW_COLOR_ERROR);
             dw_printf(PRINT_PREFIX "Failed to create Avahi client: %s\n", avahi_strerror(error));

src/encode_aprs.c

@@ -125,7 +125,7 @@ static int set_norm_position (char symtab, char symbol, double dlat, double dlon
  *		height	- Feet.
  *		gain	- dBi.
  *
- * 		course	- Degress, 0 - 360 (360 equiv. to 0).  
+ * 		course	- Degrees, 0 - 360 (360 equiv. to 0).
  *			  Use G_UNKNOWN for none or unknown.
  *		speed	- knots.
  *
@@ -343,7 +343,7 @@ static int phg_data_extension (int power, int height, int gain, char *dir, char
  *
  * Purpose:     Fill in parts of the course & speed data extension.
  *
- * Inputs: 	course	- Degress, 0 - 360 (360 equiv. to 0).
+ * Inputs: 	course	- Degrees, 0 - 360 (360 equiv. to 0).
  *			  Use G_UNKNOWN for none or unknown.
  *
  *		speed	- knots.
@@ -494,7 +494,7 @@ static int frequency_spec (float freq, float tone, float offset, char *presult)
  *		gain	- dB.  Not clear if it is dBi or dBd.
  *		dir	- Directivity: N, NE, etc., omni.
  *
- *		course	- Degress, 0 - 360 (360 equiv. to 0).
+ *		course	- Degrees, 0 - 360 (360 equiv. to 0).
  *			  Use G_UNKNOWN for none or unknown.
  *		speed	- knots.		// TODO:  should distinguish unknown(not revevant) vs. known zero.
  *
@@ -636,7 +636,7 @@ int encode_position (int messaging, int compressed, double lat, double lon, int
  *		gain	- dB.  Not clear if it is dBi or dBd.
  *		dir	- Direction: N, NE, etc., omni.
  *
- *		course	- Degress, 0 - 360 (360 equiv. to 0).
+ *		course	- Degrees, 0 - 360 (360 equiv. to 0).
  *			  Use G_UNKNOWN for none or unknown.
  *		speed	- knots.
  *

src/il2p_codec.c

@@ -83,7 +83,7 @@ int il2p_encode_frame (packet_t pp, int max_fec, unsigned char *iout)
 	    out_len = IL2P_HEADER_SIZE + IL2P_HEADER_PARITY;
 
 	    if (e == 0) {
-	        // Sucess. No info part.
+	        // Success. No info part.
 	        return (out_len);
 	    }
 

src/il2p_header.c

@@ -122,7 +122,7 @@ static int get_field (unsigned char *hdr, int bit_num, int lsb_index, int width)
 
 
 // AX.25 'I' and 'UI' frames have a protocol ID which determines how the
-// information part should be interpretted.
+// information part should be interpreted.
 // Here we squeeze the most common cases down to 4 bits.
 // Return -1 if translation is not possible.  Fall back to type 0 header in this case.
 
@@ -299,7 +299,7 @@ int il2p_type_1_header (packet_t pp, int max_fec, unsigned char *hdr)
 
 	        if (frame_type == frame_type_U_UI) {
 	            SET_UI(hdr, 1);	// I guess this is how we distinguish 'I' and 'UI'
-					// on the receving end.
+					// on the receiving end.
 	            int pid = encode_pid(pp);
 	            if (pid < 0) return (-1);
 	            SET_PID(hdr, pid);
@@ -320,7 +320,7 @@ int il2p_type_1_header (packet_t pp, int max_fec, unsigned char *hdr)
 		//	1	1	1	Not valid (earlier protocol version)
 		//
 		// APRS does not mention how to set these bits and all 4 combinations
-		// are seen in the wild.  Apparently these are ignord on receive and no
+		// are seen in the wild.  Apparently these are ignored on receive and no
 		// one cares.  Here we copy from the C bit in the destination address.
 		// It should be noted that the case of both C bits being the same can't
 		// be represented so the il2p encode/decode bit not produce exactly the