From 5fce7fc94abfc13b0c264364189b7433514cd6ac Mon Sep 17 00:00:00 2001
From: Alberto Morato <alberto.morato90@gmail.com>
Date: Sun, 1 Aug 2021 15:17:31 +0200
Subject: [PATCH] Add OOK_PWM and OOK_PPM to sendook

---
 src/ook/sendook.cpp | 77 ++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 69 insertions(+), 8 deletions(-)

diff --git a/src/ook/sendook.cpp b/src/ook/sendook.cpp
index f962b9b..ebd20ae 100644
--- a/src/ook/sendook.cpp
+++ b/src/ook/sendook.cpp
@@ -26,8 +26,10 @@ Options:\n\
 -f freq : frequency in Hz (default : 433.92MHz)\n\
 -0 nb : duration in microsecond of 0 bit (by default : 500us). Use integer only.\n\
 -1 nb : duration in microsecond of 1 bit (by default : 250us)\n\
+-g nb : bit gap (by default : 500us)\n\
 -r nb : repeat nb times the message (default : 3)\n\
 -p nb : pause between each message (default : 1000us=1ms)\n\
+-m nb : modulation type 0=OOK, 1=OOK_PWM, 2=OOK_PPM (default : 0=OOK)\n\
 \n\
 \"binary code\":\n\
   a serie of 0 or 1 char (space allowed and ignored)\n\
@@ -67,9 +69,11 @@ int main(int argc, char *argv[])
 	uint64_t Freq = 433920000;
 	uint64_t bit0duration = 500; // in microsecond
 	uint64_t bit1duration = 500;
+	uint64_t bitgap = 500;
 	int nbrepeat = 3;
 	int pause = 1000; // in us
 	int dryrun = 0; // if 1 : hte message is not really transmitted
+	int modulation = 0; // 0=OOK, 1=OOK_PWM, 2=OOK_PPM
 	char *bits = NULL;
 	
 	for (int i = 0; i < 64; i++)
@@ -81,7 +85,7 @@ int main(int argc, char *argv[])
 	}
 	while(1)
 	{
-		a = getopt(argc, argv, "f:0:1:r:p:hvd");
+		a = getopt(argc, argv, "f:0:1:g:r:p:m:hvd");
 		if(a == -1)
 		{
 			if(anyargs) break;
@@ -99,12 +103,18 @@ int main(int argc, char *argv[])
 			case '1': // bit 0 duration
 				bit1duration = atouint32_metric(optarg, "Error with -1 : ");
 				break;
+			case 'g': // bit gap
+				bitgap = atouint32_metric(optarg, "Error with -g : ");
+				break;
 			case 'r':
 				nbrepeat = atoi(optarg);
 				break;
 			case 'p':
 				pause = atoi(optarg);
 				break;
+			case 'm':
+				modulation = atoi(optarg);
+				break;
 			case 'h' :
 				print_usage();
 				exit(0);
@@ -128,8 +138,10 @@ int main(int argc, char *argv[])
 	}
 	bits = argv[optind];
 	printf("Frequency set to : %" PRIu64 "Hz \n", Freq);
+	printf("Modulation: %d \n", modulation);
 	printf("Bit duration 0 : %" PRIu64 "us ; 1 : %" PRIu64 "us\n",
 		bit0duration, bit1duration);
+	printf("Bit gap = %" PRIu64 "us \n", bitgap);
 	printf("Send message %d times with a pause of %dus\n", nbrepeat, pause);
 	if (dryrun) 
 		printf("Dry run mode enabled : no message will be sent\n");
@@ -149,6 +161,13 @@ int main(int argc, char *argv[])
 			nbbits ++;
 			computed_duration += bit1duration;
 		}
+
+		/* OOK_PWM and OOK_PPM requires extra bit */
+		if((modulation == 1) || (modulation == 2))
+		{
+			computed_duration += bitgap;
+			nbbits ++;
+		}
 		// any other char is ignored (it allows to speparate nibble with a space for example)
 		// improvement : allow "." and "-" or "i" and "a" to create a MORSE sender
 	}
@@ -168,15 +187,57 @@ int main(int argc, char *argv[])
 	for(size_t i = 0; i < strlen(bits); i++)
 	{
 		char c = bits[i];
-		if (c == '0')
+		switch (modulation)
 		{
-			Message[i].value = 0; 
-			Message[i].duration = bit0duration;
-		} else if (c == '1')
-		{
-			Message[i].value = 1; 
-			Message[i].duration = bit1duration;
+		case 0: // OOK:
+			if (c == '0')
+			{
+				Message[i].value = 0; 
+				Message[i].duration = bit0duration;
+				
+			} else if (c == '1')
+			{
+				Message[i].value = 1; 
+				Message[i].duration = bit1duration;
+			}
+			break;
+		
+		case 1: // OOK_PWM:		
+			if (c == '0')
+			{
+				Message[i*2].value = 1; 
+				Message[i*2].duration = bit0duration;
+				
+			} else if (c == '1')
+			{
+				Message[i*2].value = 1; 
+				Message[i*2].duration = bit1duration;
+			}
+			Message[(i*2)+1].value = 0; 
+			Message[(i*2)+1].duration = bitgap;
+			break;
+
+		case 2: // OOK_PPM:
+			Message[i*2].value = 1; 
+			Message[i*2].duration = bitgap;
+			if (c == '0')
+			{
+				Message[(i*2)+1].value = 0; 
+				Message[(i*2)+1].duration = bit0duration;
+				
+			} else if (c == '1')
+			{
+				Message[(i*2)+1].value = 0; 
+				Message[(i*2)+1].duration = bit1duration;
+			}
+			break;
+
+
+		
+		default:
+			break;
 		}
+		
 	}
 	
 	// Send the message