211 lines
6.7 KiB
C
211 lines
6.7 KiB
C
/*
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* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
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* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the <organization> nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* This demo demonstrates the use of the GADC module using it read both a microphone,
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* an analogue dial wheel and a temperature sensor.
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* The microphone gets read at high frequency to display a very simple oscilloscope.
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* The dial and temperature gets read at a low frequency to just print when
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* it changes value.
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*
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* It also demonstrates how to write your own custom GWIN window type.
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*/
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#include "gfx.h"
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/* Include our custom gwin oscilloscope */
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#include "gwinosc.h"
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/*
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* Match these to your hardware
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* If you don't have a DIAL device or a TEMP device - just don't define it.
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*/
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#define MY_MIC_DEVICE GADC_PHYSDEV_MICROPHONE
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#define MY_DIAL_DEVICE GADC_PHYSDEV_DIAL
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#define MY_TEMP_DEVICE GADC_PHYSDEV_TEMPERATURE
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#define MY_DIAL_JITTER 1
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#define MY_TEMP_JITTER 3
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/* Specify our timing parameters */
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#define MY_MIC_FREQUENCY 4000 /* 4khz */
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#define MY_LS_DELAY 200 /* 200ms (5 times per second) for the dial and temperature */
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/* The desired size for our scope window */
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#define SCOPE_CX 64
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#define SCOPE_CY 64
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/* Data */
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static GScopeObject gScopeWindow;
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static GConsoleObject gTextWindow;
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static GTimer lsTimer;
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#ifdef MY_DIAL_DEVICE
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static adcsample_t dialvalue;
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static adcsample_t lastdial = -(MY_DIAL_JITTER+1);
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/**
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* We have got a dial reading - handle it
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*/
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static void GotDialReading(adcsample_t *buffer, void *param) {
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(void) buffer;
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/* Buffer should always point to "dialvalue" anyway */
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/* Remove jitter from the value */
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if ((dialvalue > lastdial && dialvalue - lastdial > MY_DIAL_JITTER)
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|| (lastdial > dialvalue && lastdial - dialvalue > MY_DIAL_JITTER)) {
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/* Write the value */
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gwinPrintf((GHandle)param, "DIAL: %u\n", dialvalue);
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/* Save for next time */
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lastdial = dialvalue;
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}
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}
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#endif
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#ifdef MY_TEMP_DEVICE
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static adcsample_t tempvalue;
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static adcsample_t lasttemp = -(MY_TEMP_JITTER+1);
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/**
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* We have got a temperature reading - handle it
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*/
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static void GotTempReading(adcsample_t *buffer, void *param) {
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(void) buffer;
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/* Buffer should always point to "tempvalue" anyway */
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/* Remove jitter from the value */
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if ((tempvalue > lasttemp && tempvalue - lasttemp > MY_TEMP_JITTER)
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|| (lasttemp > tempvalue && lasttemp - tempvalue > MY_TEMP_JITTER)) {
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/* Write the value */
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gwinPrintf((GHandle)param, "TEMP: %u\n", tempvalue);
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/* Save for next time */
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lasttemp = tempvalue;
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}
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}
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#endif
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#if defined(MY_DIAL_DEVICE) || defined(MY_TEMP_DEVICE)
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/**
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* Start a read of the dial and temperature
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*/
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static void LowSpeedTimer(void *param) {
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/* We are not checking for an error here - but who cares, this is just a demo */
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#ifdef MY_DIAL_DEVICE
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gadcLowSpeedStart(MY_DIAL_DEVICE, &dialvalue, GotDialReading, param);
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#endif
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#ifdef MY_TEMP_DEVICE
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gadcLowSpeedStart(MY_TEMP_DEVICE, &tempvalue, GotTempReading, param);
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#endif
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}
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#endif
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/*
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* Application entry point.
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*/
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int main(void) {
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GHandle ghScope;
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coord_t swidth, sheight;
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#if defined(MY_DIAL_DEVICE) || defined(MY_TEMP_DEVICE)
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GHandle ghText;
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font_t font;
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#endif
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gfxInit();
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/* Get the screen dimensions */
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swidth = gdispGetWidth();
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sheight = gdispGetHeight();
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#if defined(MY_DIAL_DEVICE) || defined(MY_TEMP_DEVICE)
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/* Set up the console window we use for dial readings */
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font = gdispOpenFont("UI2");
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gwinSetDefaultFont(font);
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{
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GWindowInit wi;
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gwinClearInit(&wi);
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wi.show = TRUE;
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wi.x = wi.y = 0;
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wi.width = swidth-SCOPE_CX;
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wi.height = sheight;
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ghText = gwinConsoleCreate(&gTextWindow, &wi);
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}
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gwinSetBgColor(ghText, GFX_BLACK);
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gwinSetColor(ghText, GFX_YELLOW);
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gwinClear(ghText);
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/* Start our timer for reading the dial */
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gtimerInit(&lsTimer);
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gtimerStart(&lsTimer, LowSpeedTimer, ghText, TRUE, MY_LS_DELAY);
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#endif
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/**
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* Allocate buffers for the high speed GADC device - eg. 4 x 128 byte buffers.
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* You may need to increase this for slower cpu's.
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* You may be able to decrease this for low latency operating systems.
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* 4 x 128 seems to work on the really slow Olimex SAM7EX256 board (display speed limitation)
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* If your oscilloscope display stops but the low speed reading keep going then it is likely that
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* your high speed timer has stalled due to running out of free buffers. Increase the number
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* of buffers..
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* If you make the buffers too large with a slow sample rate you may not allow enough time for all
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* the low speed items to occur in which case your memory will fill up with low speed requests until
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* you run out of memory.
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*/
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gfxBufferAlloc(4, 128);
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/* Set up the scope window in the top right on the screen */
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{
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GWindowInit wi;
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gwinClearInit(&wi);
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wi.show = TRUE;
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wi.x = swidth-SCOPE_CX;
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wi.y = 0;
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wi.width = SCOPE_CX;
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wi.height = SCOPE_CY;
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ghScope = gwinScopeCreate(&gScopeWindow, &wi, MY_MIC_DEVICE, MY_MIC_FREQUENCY);
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}
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gwinSetBgColor(ghScope, GFX_WHITE);
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gwinSetColor(ghScope, GFX_RED);
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gwinClear(ghScope);
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/* Just keep displaying the scope traces */
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while (TRUE) {
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/**
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* The function below internally performs a wait thus giving the timer thread a
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* chance to run.
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*/
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gwinScopeWaitForTrace(ghScope);
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}
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}
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