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项目刚刚做完，文章正在整理中，未完待续，代码先贴上来(敬请期待！)....
今天我们的项目就是制作一个家庭便携式心电检测仪！
ECD06.jpg
ECD03.jpg
ECD04.jpg
ECD02.jpg
1 本章您将学到
在这个项目中，您将学到的：
- 学会使用3.5寸彩色TFT屏幕
- 学习使用心率传感器
2 工具和组件
2.1 工具列表
本项目不需要额外的工具。
2.2 元器件列表
| 元器件 | 型号 | 数量 | 备注 |
|---|---|---|---|
| 主控板 | arduino Uno | 1 | |
| 心率传感器 | 1 | ||
| 液晶屏 | 3.5 TFT | 1 | |
| 杜邦线 | 若个 | ||
| 数据线 | Uno数据线 | 1 |
2.3 工具和元器件介绍
2.3 工具和元器件介绍
2.3.1 心率传感器
HRM01.jpg
引脚说明：
- VCC：供电 3.5V-5.5V DC
- GND：接地，电源负极
2.3.2 3.5 TFT
TFT01.jpg
TFT02.jpg
TFT03.jpg
2.3.2.1 引脚说明
如下图：
| 引脚 | 符号 | 功能说明 |
|---|---|---|
| 1 | VSS | 一般接地 |
| 2 | VDD | 接电源（+5V） |
2.3.2.2 与Arduino的连接
接线方式：
3 电路设计
3.1 电路图
根据我们的项目需求，设计电路图如下：
3.2 电路原理
4 程序设计
4.1 类库介绍
4.1.1 Adafruit_GFX.h库介绍
4.1.1.1 Adafruit_GFX.h库的下载
可以在Arduino IDE中, 项目->加载库->管理库中搜索Adafruit_GFX，然后点击安装即可。
4.1.1.1 Adafruit_GFX.h库的介绍
...
...
4.2 主程序设计
/*
*名称：家用心电仪
*功能：
*作者：YXK
*时间：2018.6.15
*/
//--------------LCD Display Pins--------------------------
// LCD_RD connects to Analog pin A0
// LCD_WR connects to Analog pin A1
// LCD_RS connects to Analog pin A2
// LCD_CS connects to Analog pin A3
// LCD_RST connects to Analog pin A4
// LCD_D0 connects to digital pin 8
// LCD_D1 connects to digital pin 9
// LCD_D2 connects to digital pin 2
// LCD_D3 connects to digital pin 3
// LCD_D4 connects to digital pin 4
// LCD_D5 connects to digital pin 5
// LCD_D6 connects to digital pin 6
// LCD_D7 connects to digital pin 7
//-------------AD8232 Heart Rate sensor--------------------
//OUTPUT connects to Analog pin A5
//LO + connects to digital pin 11
//LO - connects to digital pin 10
//---------------------------------------------------------
#define LCD_CS A3 // Chip Select goes to Analog 3
#define LCD_CD A2 // Command/Data goes to Analog 2
#define LCD_WR A1 // LCD Write goes to Analog 1
#define LCD_RD A0 // LCD Read goes to Analog 0
#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin
#include "Adafruit_GFX.h"
#include <MCUFRIEND_kbv.h>
MCUFRIEND_kbv tft;
//#include <Adafruit_TFTLCD.h>
//Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
// Assign human-readable names to some common 16-bit color values:
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
extern const uint8_t hanzi[];
// void showhanzi();
extern uint8_t HanziCompanyName[];
extern uint8_t HanziProductName[];
const int LO1Pin = 10; //LO -
const int LO2Pin = 11; //LO +
const int heartSensorPin = A5;
int heartSensorValue;
int x, y;
void setup()
{
Serial.begin(9600);
pinMode(LO1Pin, INPUT); // Setup for leads off detection LO -
pinMode(LO2Pin, INPUT); // Setup for leads off detection LO +
pinMode(heartSensorPin, INPUT);
Serial.println(F("TFT LCD test"));
tft.reset();
uint16_t identifier = tft.readID();
if(identifier == 0x9325) {
Serial.println(F("Found ILI9325 LCD driver"));
} else if(identifier == 0x9328) {
Serial.println(F("Found ILI9328 LCD driver"));
} else if(identifier == 0x4535) {
Serial.println(F("Found LGDP4535 LCD driver"));
}else if(identifier == 0x7575) {
Serial.println(F("Found HX8347G LCD driver"));
} else if(identifier == 0x9595) {
Serial.println(F("Found HX8347-I LCD driver"));
} else if(identifier == 0x4747) {
Serial.println(F("Found HX8347-D LCD driver"));
} else if(identifier == 0x8347) {
Serial.println(F("Found HX8347-A LCD driver"));
}else if(identifier == 0x9341) {
Serial.println(F("Found ILI9341 LCD driver"));
}else if(identifier == 0x7783) {
Serial.println(F("Found ST7781 LCD driver"));
}else if(identifier == 0x8230) {
Serial.println(F("Found UC8230 LCD driver"));
}else if(identifier == 0x8357) {
Serial.println(F("Found HX8357D LCD driver"));
} else if(identifier==0x0101){
identifier=0x9341;
Serial.println(F("Found 0x9341 LCD driver"));
}else if(identifier==0x7793){
Serial.println(F("Found ST7793 LCD driver"));
}else if(identifier==0xB509){
Serial.println(F("Found R61509 LCD driver"));
}else if(identifier==0x9486){
Serial.println(F("Found ILI9486 LCD driver"));
}else if(identifier==0x9488){
Serial.println(F("Found ILI9488 LCD driver"));
}else {
Serial.print(F("Unknown LCD driver chip: "));
Serial.println(identifier, HEX);
Serial.println(F("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
Serial.println(F(" #define USE_ADAFRUIT_SHIELD_PINOUT"));
Serial.println(F("should appear in the library header (Adafruit_TFT.h)."));
Serial.println(F("If using the breakout board, it should NOT be #defined!"));
Serial.println(F("Also if using the breakout, double-check that all wiring"));
Serial.println(F("matches the tutorial."));
identifier=0x9486;
}
tft.begin(identifier);
Serial.print("TFT size is ");
Serial.print(tft.width());
Serial.print("x");
Serial.println(tft.height());
tft.setRotation(1);
tft.fillScreen(BLACK);
tft.drawRect(80,80,320,160,RED);
tft.fillRect(80,80,320,160,RED);
tft.setCursor(120, 100);
tft.setTextSize(2);
tft.setTextColor(GREEN);
tft.setFont(HanziProductName,12,16,'0');
tft.println("0123456789");
tft.setCursor(130, 180);
tft.setTextColor(BLUE);
tft.setTextSize(2);
tft.setFont(HanziCompanyName,12,16,'0');
tft.println("012345678");
tft.resetFont();
delay (2000);
tft.drawRect(0,0,480,13,RED);
tft.fillRect(0,0,480,13,RED);
tft.setTextSize(1);
tft.setTextColor(BLACK);
tft.setCursor(90,2);
tft.print("* Home digital LCD display electrocardiograph *");
tft.drawRect(0,306,480,13,RED);
tft.fillRect(0,306,480,13,RED);
tft.setTextSize(1);
tft.setTextColor(BLACK);
tft.setCursor(160,308);
tft.print("< http://www.alphak12.com >");
tft.drawRect(0,14,480,292,BLUE);
tft.fillRect(1,15,478,290,BLACK);
tft.drawLine(1, 240, 478, 240,BLUE);
x = 1;
}
void loop(){
if((digitalRead(LO1Pin) == 1)||(digitalRead(LO2Pin) == 1)){
Serial.println('!');
}
else{
heartSensorValue = analogRead(heartSensorPin);
// Serial.println(analogRead(heartSensorPin));
y = 239 - (int)(heartSensorValue/10)*1.5;
// tft.drawLine(x, 239, x, y,BLUE);
tft.drawPixel(x,y,YELLOW);
x++;
if(x == 478){
x = 1;
tft.drawRect(0,14,480,292,BLUE);
tft.fillRect(1,15,478,290,BLACK);
tft.drawLine(1, 240, 478, 240,BLUE);
}
}
delay(5);
}
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4 安装调试
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检测01.jpg
检测02.jpg
检测03.jpg
检测04.jpg
检测05.jpg
检测06.jpg
检测07.jpg
检测08.jpg
5 总结扩展
...
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