Rod Boyce rodb70

TPM2 Protocol Implementation

Introduction

Frame data is transferred inside packets (similar to DMX, for example). A frame is an image representing a matrix or a light scene.

The packets start and end with one-byte characters. In between are a few control bytes followed by the payload. There is no set size for a payload; it is transmitted with each packet. This makes the protocol quite flexible. There are enough bytes in a single packet for an RGB matrix with 21,845 pixels, but if you just want to control an RGBW lamp, that only requires 9 bytes. The variable frame size means there is no overhead, allowing for maximum transfer speed.

	#include <stdio.h>
	#include <string.h>
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <arpa/inet.h>

	void ping(int s, char *message)
	{
	char buf[8192];

	#define _XOPEN_SOURCE 500 /* Enable certain library functions (strdup) on linux. See feature_test_macros(7) */

	#include <time.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <limits.h>
	#include <string.h>
	#include <assert.h>

	struct avl_node_s {

Rod Boyce rodb70

TPM2 Protocol Implementation

Introduction

TPM2 Packet Structure