128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
|
|
Simple oscilliscope with auto y-scale and variable x-scale.
|
|
Use joystick to select channel and x-scale and touch the hackbus ports
|
|
to generate some signals to see on your new oscilliscope.
|
|
Press the button to quit.
|
|
|
|
Paul Gardner-Stephen paul@servalproject.org
|
|
|
|
I hereby place this program into the public domain so far is as possible under law.
|
|
13 August 2011.
|
|
*/
|
|
#include <sysinit.h>
|
|
#include <string.h>
|
|
|
|
#include "basic/basic.h"
|
|
#include "basic/config.h"
|
|
#include "lcd/render.h"
|
|
#include "lcd/display.h"
|
|
#include "funk/mesh.h"
|
|
#include "usetable.h"
|
|
#include "core/adc/adc.h"
|
|
|
|
void ram(void) {
|
|
int alive=0;
|
|
int ys[96];
|
|
lcdClear();
|
|
DoString(5,1,"Oscilliscope");
|
|
lcdDisplay();
|
|
|
|
int i;
|
|
int ch=1;
|
|
int kok=1;
|
|
int xs=3,yscale=1;
|
|
char scale[]="01234567";
|
|
|
|
while (1) {
|
|
lcdSetPixel(alive,9,0);
|
|
alive++; alive&=63;
|
|
lcdSetPixel(alive,9,1);
|
|
|
|
int ticks=64>>yscale;
|
|
for(i=10;i<60;i++) lcdSetPixel(7,i,0);
|
|
for(i=0;i<ticks;i++)
|
|
lcdSetPixel(7,10+50*i/ticks,1);
|
|
|
|
ticks=64>>xs;
|
|
for(i=10;i<90;i++) lcdSetPixel(i,59,0);
|
|
for(i=0;i<ticks;i++)
|
|
lcdSetPixel(10+80*i/ticks,59,1);
|
|
|
|
int junk=xs;
|
|
int x;
|
|
int ysum;
|
|
int gnr,lnr;
|
|
|
|
char n[2];
|
|
n[1]=0;
|
|
n[0]='Y';
|
|
DoString(0,32,n);
|
|
n[0]=scale[yscale];
|
|
DoString(0,40,n);
|
|
|
|
n[0]='X';
|
|
DoString(16,60,n);
|
|
n[0]=xs/10+'0';
|
|
if (n[0]=='0') n[0]=' ';
|
|
DoString(24,60,n);
|
|
n[0]=xs%10+'0';
|
|
DoString(32,60,n);
|
|
|
|
n[0]='C';
|
|
DoString(64,60,n);
|
|
n[0]='h';
|
|
DoString(72,60,n);
|
|
n[0]=ch+'0';
|
|
DoString(80,60,n);
|
|
|
|
int ybias=ysum/(96-8);
|
|
ysum=0;
|
|
if ((lnr<4)&&(yscale>1)) {
|
|
// increase scale to fit data
|
|
yscale--;
|
|
} else if ((gnr>8)&&(yscale<64)) {
|
|
// reduce scale to fit data
|
|
yscale++;
|
|
}
|
|
gnr=0; lnr=0;
|
|
for(x=8;x<96;x++) {
|
|
int y;
|
|
y=adcRead(ch);
|
|
ysum+=y;
|
|
y=y-ybias;
|
|
y=y/yscale;
|
|
if (y<-25||y>25) gnr++;
|
|
else if (y<-12||y>12) lnr++;
|
|
y+=25;
|
|
if (y<0) y=0;
|
|
if (y>50) y=50;
|
|
if (y<0) y=0; if (y>31) y=31;
|
|
if (y!=ys[x]) {
|
|
lcdSetPixel(x,35+(ys[x]-25),0);
|
|
lcdSetPixel(x,35+(y-25),1);
|
|
ys[x]=y;
|
|
}
|
|
|
|
// Crude means of delay with bits to deal with zealous optimisers
|
|
int delay=xs*xs;
|
|
for(i=0;i<delay;i++) lcdSetPixel(0,xs,0);
|
|
|
|
}
|
|
|
|
if (1) {
|
|
int k=getInputRaw();
|
|
switch(k) {
|
|
case BTN_LEFT: if (kok) { xs--; xs&=63; kok=0; } break;
|
|
case BTN_RIGHT: if (kok) { xs++; xs&=63; kok=0; } break;
|
|
case BTN_UP: if (kok) { ch++; ch&=7; kok=0; } break;
|
|
case BTN_DOWN: if (kok) { ch--; ch&=7; kok=0; } break;
|
|
case BTN_ENTER: return;
|
|
default: kok=1;
|
|
}
|
|
}
|
|
|
|
lcdDisplay();
|
|
}
|
|
}
|
|
#include "core/adc/adc.c"
|