From acf367aab41e13b047df6670ffbb27cea8afe2d9 Mon Sep 17 00:00:00 2001
From: Joshua Allen <axlecrusher@gmail.com>
Date: Fri, 10 Feb 2017 21:09:14 -0500
Subject: add code to try to deal with lighthouse data. need to decode which
 lighthouse is sending the sync pulse. I could not get the disambiguator to
 work.

---
 tools/ootx_decode/ootx_decode.c  | 66 +++++++++++++++++++++++++++++++++++++---
 tools/ootx_decode/ootx_decoder.c | 29 +++++++++++++-----
 tools/ootx_decode/ootx_decoder.h |  2 ++
 3 files changed, 85 insertions(+), 12 deletions(-)

(limited to 'tools')

diff --git a/tools/ootx_decode/ootx_decode.c b/tools/ootx_decode/ootx_decode.c
index 030b31b..735b5fc 100644
--- a/tools/ootx_decode/ootx_decode.c
+++ b/tools/ootx_decode/ootx_decode.c
@@ -20,10 +20,15 @@ void my_test(ootx_packet* packet) {
 	printf("%d %s 0x%X\n", packet->length, packet->data, packet->crc32);
 }
 
-int main(int argc, char* argv[])
-{
-	ootx_decoder_context ctx;
-	ootx_init_decoder_context(&ctx);
+void my_test2(ootx_packet* packet) {
+	printf("completed ootx packet\n");
+//	packet->data[packet->length] = 0;
+//	printf("%d %s 0x%X\n", packet->length, packet->data, packet->crc32);
+}
+
+ootx_decoder_context ctx[2];
+
+void hello_world_test() {
 //	ootx_init_buffer();
 	ootx_packet_clbk = my_test;
 
@@ -45,8 +50,59 @@ int main(int argc, char* argv[])
 			&ticks);
 //		printf("%d\n", ticks);
 
-		ootx_process_bit(&ctx, ticks);
+		ootx_process_bit(ctx, ticks);
 	}
+}
+
+void raw_test() {
+	ootx_packet_clbk = my_test2;
+
+	char* line = NULL;
+	size_t line_len = 0;
+	char trash[100] = "";
+	int32_t atime = 0x00;
+	uint32_t ticks = 0x00;
+	uint32_t delta = 0x00;
+
+	int8_t current_lighthouse = 0;
+
+	while (getline(&line,&line_len,stdin)>0) {
+//		printf("%s\n", line);
+
+		//HMD 20 0 5881 765645903 -5
+		sscanf(line,"%s %s %s %d %d %d",
+			trash,
+			trash,
+			trash,
+			&ticks,
+			&atime,
+			&delta);
+//		printf("%d\n", ticks);
+
+		int8_t lh = ootx_decode_lighthouse_number(current_lighthouse, ticks, delta);
+
+		if (lh > -1) {
+			//change to newly found lighthouse
+			current_lighthouse = lh;
+//			printf("%d %d %d\n", ticks, delta, current_lighthouse);
+			ootx_process_bit(ctx+current_lighthouse, ticks);
+			printf("%d %d %d\n", current_lighthouse, *(ctx->payload_size), ctx->found_preamble);
+		}
+/*
+		if (current_lighthouse >= 0) {
+			ootx_process_bit(ctx+current_lighthouse, ticks);
+		}
+
+*/
+	}	
+}
+
+int main(int argc, char* argv[])
+{
+	ootx_init_decoder_context(ctx);
+	ootx_init_decoder_context(ctx+1);
+
+	raw_test();
 
 	return 0;
 }
\ No newline at end of file
diff --git a/tools/ootx_decode/ootx_decoder.c b/tools/ootx_decode/ootx_decoder.c
index 5a14113..b386132 100644
--- a/tools/ootx_decode/ootx_decoder.c
+++ b/tools/ootx_decode/ootx_decoder.c
@@ -21,7 +21,7 @@ void ootx_init_decoder_context(ootx_decoder_context *ctx) {
 	ctx->buf_offset = 0;
 	ctx->bits_written = 0;
 
-	ctx->preamble = 0x00;
+	ctx->preamble = 0XFFFFFFFF;
 	ctx->bits_processed = 0;
 	ctx->found_preamble = 0;
 
@@ -36,12 +36,27 @@ void ootx_init_buffer() {
 	*payload_size = 0;
 }
 */
-uint8_t ootx_decode_bit(uint32_t length) {
-	length = ((length/500)*500)+500;
 
-	length-=3000;
-	if (length>=2000) { length-=2000; }
-	if (length>=1000)  { return 0xFF; }
+/*
+	how to decode pulses
+	ticks>2000 && delta>100000== master lighthouse
+	ticks>2000 && delta>10000 == slave lighthouse
+*/
+
+int8_t ootx_decode_lighthouse_number(uint8_t last_num, uint32_t ticks, int32_t delta) {
+	if (ticks<2000) return -1; //sweep
+	if ((ticks > 2000) & (delta>100000)) return 0; //master
+	if ((ticks > 2000) & (delta>10000)) return last_num+1; //a slave
+	return -1;
+}
+
+
+uint8_t ootx_decode_bit(uint32_t ticks) {
+	ticks = ((ticks/500)*500)+500;
+
+	ticks-=3000;
+	if (ticks>=2000) { ticks-=2000; }
+	if (ticks>=1000)  { return 0xFF; }
 
 	return 0x00;
 }
@@ -97,7 +112,7 @@ void ootx_process_bit(ootx_decoder_context *ctx, uint32_t length) {
 	if ( ootx_detect_preamble(ctx, dbit) ) {
 		/*	data stream can start over at any time so we must
 			always look for preamble bits */
-//		printf("Preamble found\n");
+		printf("Preamble found\n");
 		ootx_reset_buffer(ctx);
 		ctx->bits_processed = 0;
 		ctx->found_preamble = 1;
diff --git a/tools/ootx_decode/ootx_decoder.h b/tools/ootx_decode/ootx_decoder.h
index 2c0ee63..696fecb 100644
--- a/tools/ootx_decode/ootx_decoder.h
+++ b/tools/ootx_decode/ootx_decoder.h
@@ -29,6 +29,8 @@ typedef struct {
 //void ootx_init_buffer();
 void ootx_process_bit(ootx_decoder_context *ctx, uint32_t length);
 void ootx_init_decoder_context(ootx_decoder_context *ctx);
+int8_t ootx_decode_lighthouse_number(uint8_t last_num, uint32_t ticks, int32_t delta);
+
 
 extern void (*ootx_packet_clbk)(ootx_packet* packet);
 
-- 
cgit v1.2.3