[RISC-V MCU 应用开发] ESP32C3驱动ET7207实现频谱显示

#include <SPI.h>

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>



#define SCREEN_WIDTH 128 // OLED display width, in pixels

#define SCREEN_HEIGHT 64 // OLED display height, in pixels



// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)

// The pins for I2C are defined by the Wire-library. 

// On an arduino UNO:       A4(SDA), A5(SCL)

// On an arduino MEGA 2560: 20(SDA), 21(SCL)

// On an arduino LEONARDO:   2(SDA),  3(SCL), ...

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);





#define DATA_PIN    A0

#define RESET_PIN   18

#define STROBE_PIN  19



#define READ_DELAY  100



int OutValue = 0;

unsigned int bands[7];

unsigned int Min_DC[7]={4095,4095,4095,4095,4095,4095,4095};

void setup() 

{

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally

  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS))

  {

    Serial.println(F("SSD1306 allocation failed"));

    for(;;); // Don't proceed, loop forever

  }



  // Show initial display buffer contents on the screen --

  // the library initializes this with an Adafruit splash screen.

  display.display();

  delay(2000); // Pause for 2 seconds



  // Clear the buffer

  display.clearDisplay();  



  Serial.begin(115200);



  pinMode(RESET_PIN, OUTPUT);

  pinMode(STROBE_PIN,OUTPUT);

//  pinMode(DATA_PIN ,  INPUT);

  digitalWrite(RESET_PIN , LOW);    delay(1);

  digitalWrite(STROBE_PIN, LOW);    delay(1);





}



void loop() 

{



  digitalWrite(RESET_PIN, HIGH);  delayMicroseconds(10+72);

  digitalWrite(STROBE_PIN,HIGH);  delayMicroseconds(10+72);

  digitalWrite(STROBE_PIN, LOW);  delayMicroseconds(10+72);

  digitalWrite(RESET_PIN , LOW);

  for(int i=0;i<7;i++)

  {

    digitalWrite(STROBE_PIN, HIGH);

    delayMicroseconds(10+72);

    digitalWrite(STROBE_PIN , LOW);

   delayMicroseconds(10+72);

  }

  for(int i=0;i<7;i++)

  {

    digitalWrite(STROBE_PIN, HIGH);

    delayMicroseconds(10+72);

    digitalWrite(STROBE_PIN , LOW);

   delayMicroseconds(10+72);

    bands[i] = analogRead(DATA_PIN);

    if(bands[i]<Min_DC[i]) Min_DC[i] = bands[i];

    bands[i] = bands[i] - Min_DC[i];

  }

  for(int i=0;i<7;i++)

  {

    Serial.print(bands[i]);

    Serial.print("  :");

  }

  Serial.println();

  delay(5);

  display.clearDisplay();  

  for(int i=0;i<7;i++)

  {

    int barH = map(bands[i], 0, 4096, 0, SCREEN_HEIGHT);

    display.fillRect( 0+(i*10), SCREEN_HEIGHT-barH , 8 , barH , SSD1306_WHITE ); 

  }

  display.display();



}