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