1 files changed, 103 insertions, 0 deletions
diff --git a/tools/ootx_decode/HMD_Datagen.c b/tools/ootx_decode/HMD_Datagen.c
new file mode 100644
index 0000000..15ed62c
--- /dev/null
+++ b/tools/ootx_decode/HMD_Datagen.c
@@ -0,0 +1,103 @@
+// (C) 2017 Joshua Allen, MIT/x11 License.
+//
+//All MIT/x11 Licensed Code in this file may be relicensed freely under the GPL or LGPL licenses.
+
+/* generate data to test ootx decoding */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <time.h>
+#include <stdlib.h>
+#include <zlib.h>
+
+//this program is broken and does not produce useable data.
+
+uint32_t time_stamp = -525198892;
+
+char* fmt_str = "L Y HMD %d 5 1 206230 %d\n";
+
+void print_bit(uint8_t data);
+void print_preamble();
+void print_uint16(uint16_t d);
+void print_uint32(uint32_t d);
+void print_payload(char* data, uint16_t length);
+
+
+int main(int argc, char* argv[])
+{
+	char* str = "Hello World!";
+//	printf("%s\n", str);
+
+	srand(time(NULL));
+
+	print_preamble();
+
+	uint16_t payload_lenth = strlen(str);
+	uint32_t crc = crc32( 0L, Z_NULL, 0 );
+	crc = crc32( crc, (uint8_t*)str,payload_lenth);
+
+	print_uint16(payload_lenth);
+	print_payload(str,payload_lenth);
+	print_uint32(crc);
+
+	return 0;
+}
+
+void print_preamble() {
+	int i;
+	for (i=0;i<17;++i) print_bit(0);
+	print_bit(1);
+}
+
+void print_uint16(uint16_t d) {
+	int i;
+	for (i=0;i<16;++i) {
+		print_bit(d & 0x0001);
+		d>>=1;
+	}
+	print_bit(1);
+}
+
+void print_uint32(uint32_t d) {
+	int i = 0;
+	for (;i<16;++i) {
+		print_bit(d & 0x01);
+		d>>=1;
+	}
+	print_bit(1);
+
+	for (;i<32;++i) {
+		print_bit(d & 0x01);
+		d>>=1;
+	}
+	print_bit(1);
+}
+
+void print_payload(char* data, uint16_t length) {
+	int i;
+	for(i=0;i<length;i+=2) {
+		uint16_t d = *((uint16_t*)(data+i));
+//		printf("%d\n", d);
+		print_uint16(d);
+	}
+}
+
+void print_bit(uint8_t data) {
+	uint32_t length = 3000 + (rand()%2)*500 + data*1000 + (rand()%2)*2000;
+	length -= rand()%500;
+	printf(fmt_str, time_stamp, length);
+
+	time_stamp++;
+
+	/*
+	//to decode
+	// 3000 + x*500 + dbit*1000 + y*2000
+	length -= 3000;
+	if (length>=2000) { length-=2000; y = 0x01; }
+	if (length>=1000)  { length-=1000; dbit = 0x01; }
+	if (length>=500)  { x = 0x01; }
+	*/
+
+	//fire off a callback when a full OOTX packet is received
+}