From a5cebd68fd168f86472405e4ac057d86e5c4b658 Mon Sep 17 00:00:00 2001
From: Alan Johnston <alan.b.johnston@gmail.com>
Date: Thu, 12 Jun 2025 09:11:39 -0400
Subject: [PATCH] Update main.c add FC_SIM

---
 main.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/main.c b/main.c
index b9381498..d290e80c 100644
--- a/main.c
+++ b/main.c
@@ -2314,7 +2314,8 @@ if (setting == ON) {
 void get_tlm_fc() {  // FunCube Mode telemetry generation
 
 //# define FC_EM
-#define JY_1	
+#define JY_1
+//#define FC_SIM	
 	
 	/* create data, stream, and waveform buffers */
 
@@ -2339,7 +2340,18 @@ void get_tlm_fc() {  // FunCube Mode telemetry generation
 	//	source_bytes[1] = 0x08 ; // extended Nayify - works per code
 	source_bytes[1] = 0x10 ; // extended JY-1 - works, no documentation
 	int extended = 1;
+#endif
+#ifdef FC_SIM
+//	source_bytes[0] = 0b11000001 ;    // Sat Id is extended, Frame 2 (RT2 + WO2)
+	source_bytes[0] = 0xE0 | 0x20 | 0x00; // 1;    // Sat Id is extended, Frame 34 (RT2 + IMG2)
+
+	source_bytes[0] = source_bytes[0] | ( 0x01 & (uint8_t)(sequence % 2));  // alternate last bit for RT1, RT2.
 
+	//	source_bytes[1] = 0x08 ; // extended Nayify - works per code
+	source_bytes[1] = 0x10 ; // extended JY-1 - works, no documentation
+	int extended = 1;
+#endif	
+#if defined FC_SIM || JY_1	
 //	if (sequence > 10) {
 		if (image_file == NULL)  {
 			image_file = fopen("/home/pi/CubeSatSim/image_file.bin", "r");
@@ -2395,7 +2407,7 @@ void get_tlm_fc() {  // FunCube Mode telemetry generation
 //	printf("X %x Y %x Z %x B %x\n", x, y, z, b);
 //	printf("iX %x iY %x iZ %x iB %x iC\n", ix, iy, iz, ib, ic);
 	
-#ifdef JY_1	
+#if defined JY_1 || FC_SIM
 	source_bytes[extended + FC_EPS + 0] = 0xff & (x >> 6);  // Vx
 	source_bytes[extended + FC_EPS + 1] = 0xfc & (x << 2);
         source_bytes[extended + FC_EPS + 1] = source_bytes[extended + FC_EPS + 1] | (0x03 & (y >> 12));