arduino TFT彩屏示波器v2.0正式版源程序+电路图 -

#include <Adafruit_GFX.h>
#include <MCUFRIEND_kbv.h>
#include <TouchScreen.h>
MCUFRIEND_kbv tft;
const int XP=7,XM=A1,YP=A2,YM=6; //ID=0x5408
const int TS_LEFT=772,TS_RT=151,TS_TOP=953,TS_BOT=156;
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);
TSPoint tp;
#define MINPRESSURE 200
#define MAXPRESSURE 1000
// 颜色值:
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
//RGB颜色
#define RGB(r,g,b) (((r&0xF8)<<8)|((g&0xFC)<<3)|(b>>3))
#define GREY RGB(127, 127, 127)
#define DARKGREY RGB(64, 64, 64)
#define TURQUOISE RGB(0, 128, 128)
#define PINK RGB(255, 128, 192)
#define OLIVE RGB(128, 128, 0)
#define PURPLE RGB(128, 0, 128)
#define AZURE RGB(0, 128, 255)
#define ORANGE RGB(255,128,64)
#define ch1 A5
#define max_buf 321
#define max 320
#define _ms 150
#define vatel 5
int xpos, ypos;
uint8_t PENRADIUS = 1;
uint8_t Orientation = 1; //屏幕旋转
int i,value;
int time[]={0,7,20,46,102,224,460};
int _adc,_us;
int _id; //点击的按钮id
int buf[max_buf];
int buf_old[max];
bool hold=false;
long t;
int delay_us=0;
int Freq,Cycl,Duty,Pw,V_max,V_min,V_mid,Vpp;
int i1,i2,i3;
int Tv=209; //触发电压
String sj[]={" x1:1 "," x10:1 ","x100:1"};
int mode=0;
float _Vmax,_Vmin,_Vmid,_Vrms;
int old_Freq,old_Duty;
bool parameter=false;
int adc_i=8;
/*
//主菜单
void man_menu(void){
tft.fillScreen(BLACK);
tft.setTextSize(1);
tft.setTextColor(WHITE, BLACK);
tft.setCursor(60, 20);
tft.print("plase select menu");
btn_osc.initButton(&tft,100,60,120,40,WHITE,CYAN,BLACK, "OSC",2);
btn_pwm.initButton(&tft,100,110,120,40,WHITE,CYAN,BLACK, "PWM",2);
btn_osc.drawButton(false);
btn_pwm.drawButton(false);
while (1) {
update_button_list(buttons);
if (btn_osc.justPressed()) {
btn_osc.drawButton(true);
osc();
}
}
}*/
void setup(void){
tft.reset();
tft.begin(0x5408);
tft.setRotation(Orientation);
osc();
}
void draw_btn(int x,int y,int w,int h,String lable){
tft.setTextColor(WHITE, BLUE);
tft.drawRoundRect(x, y, w, h, 3, RED);
tft.setCursor(x+3, y+9);
tft.print(lable);
}
//示波器
void osc(void){
tft.fillScreen(BLACK);
tft.fillRect(0, 0, tft.width(), 30, BLUE);
tft.fillRect(0, 210, tft.width(), 30, BLUE);
tft.setTextSize(0);
draw_btn(2,212,48,25," Auto");
draw_btn(55,212,48,25," x1:1 ");
draw_btn(108,212,48,25," D+");
draw_btn(162,212,48,25," D-");
draw_btn(217,212,48,25,"measure");
draw_btn(271,212,48,25," Hold");
while(1){
bool down =Touch_getXY();
if(down&&ypos<230&&ypos>200){
if(xpos>2&&xpos<48){ //Auto
_id=0;
delay(100);
}else if(xpos>55&&xpos<103){ //衰减
_id=1;
mode++;
if(mode>2){mode=0;}
draw_btn(55,212,48,25,sj[mode]);
}else if(xpos>108&&xpos<157){ //D+
_id=2;
_us+=1;
if(_us>=6){_us=6;}
}else if(xpos>162&&xpos<210){ //D-
_id=3;
_us-=1;
if(_us<=0){_us=0;}
}else if(xpos>217&&xpos<266){ //测量
_id=4;
tft.fillRect(0, 0, tft.width(), 30, BLUE);
if(parameter){
parameter=false;
}else{
parameter=true;
}
//delay(100);
}else if(xpos>271&&xpos<320){ //hold
_id=5;
tft.setTextColor(WHITE, BLACK);
tft.setCursor(5, 40);
if(hold){
hold=false;
tft.print(" ");
}else{
hold=true;
tft.print("HOLD");
}
delay(100);
}
}else if(down&&ypos<200&&ypos>20){ //触发电压
tft.drawLine(0, Tv, 5, Tv, BLACK);
Tv=ypos+10;
}
if(hold==false){
sampling();
measure();
display_cls();
display();
}
}
}
//获取触屏位置
bool Touch_getXY(void){
tp = ts.getPoint(); //tp.x, tp.y的值从ADC读取
pinMode(XM, OUTPUT); //恢复共享引脚
pinMode(YP, OUTPUT);
bool pressed = (tp.z>MINPRESSURE && tp.z<MAXPRESSURE);
//模屏竖屏坐标计算
if (pressed) {
switch (Orientation) {
case 0:
xpos = map(tp.x, TS_LEFT, TS_RT, 0, tft.width());
ypos = map(tp.y, TS_TOP, TS_BOT, 0, tft.height());
break;
case 1:
xpos = map(tp.y, TS_TOP, TS_BOT, 0, tft.width());
ypos = map(tp.x, TS_RT, TS_LEFT, 0, tft.height());
break;
case 2:
xpos = map(tp.x, TS_RT, TS_LEFT, 0, tft.width());
ypos = map(tp.y, TS_BOT, TS_TOP, 0, tft.height());
break;
case 3:
xpos = map(tp.y, TS_BOT, TS_TOP, 0, tft.width());
ypos = map(tp.y, TS_LEFT, TS_RT, 0, tft.height());
break;
}
/*
tft.setTextColor(WHITE,BLUE);
tft.setCursor(250, 10);
tft.print("x=" + String(xpos) + " y=" + String(ypos) + " ");*/
}
return pressed;
}
void loop(){
}
//ADC采样通道
void ADC_pin(uint16_t pin){
switch(pin){
case A0: //A0
ADMUX =_BV(REFS0);break;
case A1: //A1
ADMUX =_BV(REFS0)|_BV(MUX0);break;
case A2: //A2
ADMUX =_BV(REFS0)|_BV(MUX1);break;
case A3: //A3
ADMUX =_BV(REFS0)|_BV(MUX0)|_BV(MUX1);break;
case A4: //A4
ADMUX =_BV(REFS0)|_BV(MUX2);break;
case A5: //A5
ADMUX =_BV(REFS0)|_BV(MUX0)|_BV(MUX2);break;
case A6: //A6
ADMUX =_BV(REFS0)|_BV(MUX1)|_BV(MUX2);break;
case A7: //A7
ADMUX=_BV(REFS0)|_BV(MUX0)|_BV(MUX1)|_BV(MUX2);
break;
default:
break;
}
//ADMUX |= (1<<REFS1)|(1<<REFS0);//内部1.1V参考电压
}
//ADC分频，采样速率
void ADC_adcsra(int key) {
switch (key){
case 4://ADC Sample=16MHz/4/13=307.6KHz,实测142.8KHz
ADCSRA = _BV(ADPS1); //7us采样一次
break;
case 8://ADC Sample=16MHz/8/13=153.8KHz,实测100KHz
ADCSRA = _BV(ADPS0)|_BV(ADPS1); //10us采样一次
break;
case 16://ADC Sample=16MHz/16/13=76.8KHz,实测58.8KHz
ADCSRA = _BV(ADPS2); //17us采样一次
break;
case 32://ADC Sample=16MHz/32/13= 38.4KHz,实测33.3KHz
ADCSRA = _BV(ADPS2)|_BV(ADPS0); //30us采样一次
break;
case 64://ADC Sample=16MHz/64/13= 19.2KHz,实测17.8KHz
ADCSRA = _BV(ADPS2)|_BV(ADPS1); //56us采样一次
break;
case 128://ADC Sample=16MHz/128/13=9600Hz,实测8928Hz
ADCSRA =_BV(ADPS2)|_BV(ADPS1)|_BV(ADPS0); //112us
break;
default:
break;
}
ADCSRA |= _BV(ADEN);
}
//获取ADC采样值
int _analogRead(void){
bitClear(ADCSRA, ADIF);
ADCSRA |= _BV(ADSC);
loop_until_bit_is_set(ADCSRA, ADIF);
return ADC;
}
//采样
void sampling(){
ADC_pin(ch1); //使用ch1采样(触摸屏会更改)
ADC_adcsra(8); //使用4分频采样
//切换通道后前10次采样是错的，不要
for(i=0;i<15;i++){_analogRead();}
t = micros(); //采样开始时间
for(i=0;i<max_buf;i++){
buf[i]=_analogRead();
if(time[_us]>0){delayMicroseconds(time[_us]);}
}
t = (micros()-t)/max_buf; //采样1次时间
ADC_adcsra(128); //恢复128分频给触摸屏
}
//计算参数
void measure(void){
V_max = buf[0];V_min = buf[0];
for(i=0;i<max;i++){
V_max = ((V_max<buf[i])?buf[i]:V_max);//最大值
V_min = ((V_min>buf[i])?buf[i]:V_min);//最小值
}
V_mid = (V_max+V_min)/2; //平均值
Vpp = (V_max-V_min); //峰峰值
int H=map(Tv,30,210,1023,0);//触发值
if(Vpp==V_max&&V_mid*2==Vpp){ //方波
//周期开始点
for (i=0; i<max;i++){
if(buf[i]<V_mid&&buf[i+1]>V_mid)
{i1=i;break;}
}
for(i=i1+1;i<max;i++){
//周期内高电平结束点
if(buf[i]>V_mid&&buf[i+1]<V_mid){i2=i;}
//周期结束点
if(buf[i]<V_mid&&buf[i+1]>V_mid)
{i3=i;break;}
}
Cycl=(i3-i1); //周期时间=周期结速点-周期开始点
Pw=(i2-i1); //低电平时间
Duty =(Pw*100)/Cycl; //占空比=低电平时间/周期时间
Freq =1000000/Cycl/t; //频率
if(Vpp<H){
Cycl=0;Pw=0;Duty=0;Freq=0;
}else if(Freq<0){Freq=old_Freq;Duty=old_Duty;}
}
}
//显示
void display(void){
for(i=0;i<max+1;i++){
buf[i]=map(buf[i],0,1023,209,31); //计算坐标
}
for(i=0;i<max;i++){
tft.drawLine(i, buf[i], i, buf[i+1], WHITE);
buf_old[i]=buf[i];
}
display_v();
old_Freq=Freq;
old_Duty=Duty;
}
void display_v(void){
int a=0;
tft.setTextColor(WHITE,BLUE);
if(parameter){
//衰减倍数
if(mode==0){
a=1;
}else if(mode==1){
a=10;
}else if(mode==2){
a=100;
}
_Vmax=V_max*vatel/1023;
_Vmin=V_min*vatel/1023;
_Vmid=V_mid*vatel/1023;
_Vrms=Vpp*vatel/1023;
tft.setCursor(2, 5);
tft.print("Freq:");
tft.print(Freq);
tft.print("Hz ");
tft.setCursor(2, 20);
tft.print("Cycl:");
tft.print(Cycl*t);
tft.print("us ");
tft.setCursor(85, 5);
tft.print("Pw:");
tft.print(Pw*t);
tft.print("us ");
tft.setCursor(85, 20);
tft.print("Duty:");
tft.print(Duty);
tft.print("% ");
tft.setCursor(155, 5);
tft.print("Vmax:");
tft.print(_Vmax*a);
tft.print("V ");
tft.setCursor(155, 20);
tft.print("Vmin:");
tft.print(_Vmin*a);
tft.print("V ");
tft.setCursor(235, 5);
tft.print("Vmid:");
tft.print(_Vmid*a);
tft.print("V ");
tft.setCursor(235, 20);
tft.print("Vrms:");
tft.print(_Vrms*a);
tft.print("V ");
}else{
tft.setTextColor(WHITE,BLUE);
tft.setCursor(5, 14);
tft.print("Arduino Digital OSC V2.0");
tft.setCursor(250, 20);
tft.print("Delay:"+String(time[_us]) +"us ");
}
}
//清除
void display_cls(void){
for(i=0;i<max;i++){
tft.drawLine(i, buf_old[i], i, buf_old[i+1], BLACK);
}
//绘网格
for(i=32;i<=320;i+=32){ //竖线
tft.drawLine(i, 30, i, 210, DARKGREY);
}
for(i=60;i<=180;i+=30){ //横线
tft.drawLine(0, i, 320, i, DARKGREY);
}
tft.drawLine(0, 120, 320, 120, RED);
tft.drawLine(160, 30, 160, 210, RED);
//触发电压
tft.drawLine(0, Tv, 3, Tv, YELLOW);
}

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