git.zerfleddert.de Git - proxmark3-svn/blame_incremental

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Commit	Line	Data
	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// Graph utilities
	9	//-----------------------------------------------------------------------------
	10
	11	#include <stdio.h>
	12	#include <stdbool.h>
	13	#include <string.h>
	14	#include "ui.h"
	15	#include "graph.h"
	16	#include "lfdemod.h"
	17
	18	int GraphBuffer[MAX_GRAPH_TRACE_LEN];
	19	int GraphTraceLen;
	20
	21	/* write a bit to the graph */
	22	void AppendGraph(int redraw, int clock, int bit)
	23	{
	24	int i;
	25	int half = (int)(clock/2);
	26	int firstbit = bit ^ 1;
	27
	28	for (i = 0; i < half; ++i)
	29	GraphBuffer[GraphTraceLen++] = firstbit;
	30
	31	for (i = 0; i <= half; ++i)
	32	GraphBuffer[GraphTraceLen++] = bit;
	33
	34	if (redraw)
	35	RepaintGraphWindow();
	36	}
	37
	38	/* clear out our graph window */
	39	int ClearGraph(int redraw)
	40	{
	41	int gtl = GraphTraceLen;
	42	memset(GraphBuffer, 0x00, GraphTraceLen);
	43
	44	GraphTraceLen = 0;
	45
	46	if (redraw)
	47	RepaintGraphWindow();
	48
	49	return gtl;
	50	}
	51
	52	void SetGraphBuf(uint8_t *buff, int size)
	53	{
	54	if ( buff == NULL ) return;
	55
	56	uint16_t i = 0;
	57	if ( size > MAX_GRAPH_TRACE_LEN )
	58	size = MAX_GRAPH_TRACE_LEN;
	59	ClearGraph(0);
	60	for (; i < size; ++i){
	61	GraphBuffer[i] = buff[i];
	62	}
	63	GraphTraceLen = size;
	64	RepaintGraphWindow();
	65	return;
	66	}
	67
	68	// Copies grahpbuff to buff.
	69	// while triming values to the range -127 -- 127.
	70	int GetFromGraphBuf(uint8_t *buff)
	71	{
	72	if ( buff == NULL ) return -1;
	73	uint32_t i = 0;
	74
	75	for (; i < GraphTraceLen; ++i){
	76
	77	// trim upper and lower values.
	78	if (GraphBuffer[i] > 127)
	79	GraphBuffer[i] = 127;
	80	else if (GraphBuffer[i] < -127)
	81	GraphBuffer[i] = -127;
	82
	83	buff[i] = (uint8_t)(GraphBuffer[i] + 128);
	84	}
	85	return i;
	86	}
	87	/* Get or auto-detect clock rate */
	88	int GetClock(const char *str, int verbose)
	89	{
	90	int clock;
	91
	92	sscanf(str, "%i", &clock);
	93	if (!strcmp(str, ""))
	94	clock = 0;
	95
	96	/* Auto-detect clock */
	97	if (!clock) {
	98
	99	uint8_t grph[MAX_GRAPH_TRACE_LEN] = {0x00};
	100	int size = GetFromGraphBuf(grph);
	101	if ( size < 0 ) {
	102	PrintAndLog("Failed to copy from graphbuffer");
	103	return -1;
	104	}
	105	clock = DetectASKClock(grph, size, 0);
	106
	107	/* Only print this message if we're not looping something */
	108	if (verbose)
	109	PrintAndLog("Auto-detected clock rate: %d", clock);
	110	}
	111	return clock;
	112	}
	113
	114	// A simple test to see if there is any data inside Graphbuffer.
	115	bool HasGraphData(){
	116
	117	if ( GraphTraceLen <= 0) {
	118	PrintAndLog("No data available, try reading something first");
	119	return false;
	120	}
	121	return true;
	122	}
	123
	124	// Detect high and lows in Grapbuffer.
	125	// Only loops the first 256 values.
	126	void DetectHighLowInGraph(int high, int low, bool addFuzz) {
	127
	128	uint8_t loopMax = 255;
	129	if ( loopMax > GraphTraceLen)
	130	loopMax = GraphTraceLen;
	131
	132	for (uint8_t i = 0; i < loopMax; ++i) {
	133	if (GraphBuffer[i] > *high)
	134	*high = GraphBuffer[i];
	135	else if (GraphBuffer[i] < *low)
	136	*low = GraphBuffer[i];
	137	}
	138
	139	//12% fuzz in case highs and lows aren't clipped
	140	if (addFuzz) {
	141	high = (int)(high * .88);
	142	low = (int)(low * .88);
	143	}
	144	}