110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Graph utilities
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//-----------------------------------------------------------------------------
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include "ui.h"
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#include "graph.h"
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int GraphBuffer[MAX_GRAPH_TRACE_LEN];
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int GraphTraceLen;
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/* write a bit to the graph */
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void AppendGraph(int redraw, int clock, int bit)
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{
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int i;
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for (i = 0; i < (int)(clock / 2); ++i)
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GraphBuffer[GraphTraceLen++] = bit ^ 1;
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for (i = (int)(clock / 2); i < clock; ++i)
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GraphBuffer[GraphTraceLen++] = bit;
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if (redraw)
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RepaintGraphWindow();
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}
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/* clear out our graph window */
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int ClearGraph(int redraw)
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{
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int gtl = GraphTraceLen;
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memset(GraphBuffer, 0x00, GraphTraceLen);
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GraphTraceLen = 0;
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if (redraw)
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RepaintGraphWindow();
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return gtl;
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}
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/*
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* Detect clock rate
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*/
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int DetectClock(int peak)
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{
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int i;
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int clock = 0xFFFF;
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int lastpeak = 0;
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/* Detect peak if we don't have one */
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if (!peak)
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for (i = 0; i < GraphTraceLen; ++i)
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if (GraphBuffer[i] > peak)
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peak = GraphBuffer[i];
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for (i = 1; i < GraphTraceLen; ++i)
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{
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/* If this is the beginning of a peak */
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if (GraphBuffer[i - 1] != GraphBuffer[i] && GraphBuffer[i] == peak)
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{
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/* Find lowest difference between peaks */
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if (lastpeak && i - lastpeak < clock)
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clock = i - lastpeak;
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lastpeak = i;
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}
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}
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return clock;
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}
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/* Get or auto-detect clock rate */
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int GetClock(const char *str, int peak, int verbose)
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{
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int clock;
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sscanf(str, "%i", &clock);
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if (!strcmp(str, ""))
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clock = 0;
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/* Auto-detect clock */
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if (!clock)
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{
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clock = DetectClock(peak);
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/* Only print this message if we're not looping something */
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if (!verbose)
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PrintAndLog("Auto-detected clock rate: %d", clock);
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}
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return clock;
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}
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/* A simple test to see if there is any data inside Graphbuffer.
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*/
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bool HasGraphData(){
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if ( GraphTraceLen <= 0) {
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PrintAndLog("No data available, try reading something first");
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return false;
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}
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return true;
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} |