From 612aa64768248bcd11f827e42c875c02dbb308c3 Mon Sep 17 00:00:00 2001
From: JR3XNW <121542251+JR3XNW@users.noreply.github.com>
Date: Thu, 16 Mar 2023 08:49:54 +0900
Subject: [PATCH] Add files via upload

---
 pico_BandScope_v1_128x32.ino | 188 +++++++++++++++++++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 pico_BandScope_v1_128x32.ino

diff --git a/pico_BandScope_v1_128x32.ino b/pico_BandScope_v1_128x32.ino
new file mode 100644
index 0000000..d33eeb5
--- /dev/null
+++ b/pico_BandScope_v1_128x32.ino
@@ -0,0 +1,188 @@
+/*
+  OLED 128x32 Bandscope JR3XNW 2023/3/14
+  Library to add
+  arduinoFFT.h
+  Wire.h
+  U8g2lib.h
+*/
+
+#include <U8g2lib.h>
+#include <Wire.h>
+#include "arduinoFFT.h"
+
+//**************************FFT*****************************
+#define I_IN 26  //I-Input pins
+#define Q_IN 27  //Q-Input pins
+#define MOD_BUTTON 2  //mode switching
+
+#define PX1 63  //Positive frequency screen (Q) origin 62
+#define PY1 23  //Bottom edge of spectrum screen 42
+#define PY2 24  //56
+#define SAMPLES 256  //Must be a power of 2
+#define WFrow 12
+
+int mod = 0;
+
+//U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE); 
+U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
+
+arduinoFFT FFT = arduinoFFT();
+
+double vReal[SAMPLES];
+double vImag[SAMPLES];
+
+byte DSdata[256];
+byte WFdata[WFrow][128];
+
+void setup() {
+  pinMode(25, OUTPUT);      // pico built-in LED
+  pinMode(MOD_BUTTON,INPUT_PULLUP); //MODE_SWITCHING Set to input and pull-up
+  Serial.begin(115200);
+
+  analogReadResolution(12);  // Set ADC full scale to 12 bits
+  u8g2.begin();
+  u8g2.setFont(u8g2_font_6x10_tf);
+  u8g2.setDrawColor(1);
+  u8g2.setFontPosTop();  // The upper left corner is used as the character position reference.
+  u8g2.clearBuffer();
+  u8g2.drawStr(0, 0, "Band Scope v0.1");
+  u8g2.sendBuffer();
+  delay(500); 
+
+}
+ 
+void loop() {
+    digitalWrite(25, HIGH);  // Built-in LED lights up during sampling 
+    if(digitalRead(MOD_BUTTON) == LOW){Mod_Stp();} //When MOD_BUTTON is pressed, change mode
+
+    /*SAMPLING*/
+    if ( mod == 0 ) {
+      for(int i=0; i<SAMPLES; i++)
+      {
+        vReal[i] = (analogRead(I_IN) - 2048) * 3.3 / 4096.0;  //Arduinoは「0」。
+        vImag[i] = (analogRead(Q_IN) - 2048) * 3.3 / 4096.0;  //
+      }
+      digitalWrite(25, LOW);
+    } else {
+      for(int i=0; i<SAMPLES; i++)
+      {
+        vReal[i] = (analogRead(Q_IN) - 2048) * 3.3 / 4096.0;  //Arduinoは「0」。
+        vImag[i] = (analogRead(I_IN) - 2048) * 3.3 / 4096.0;  //
+      }
+      digitalWrite(25, LOW);
+    }
+
+    /*FFT*/
+    FFT.Windowing(vReal, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
+    FFT.Windowing(vImag, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD); 
+    FFT.Compute(vReal, vImag, SAMPLES, FFT_REVERSE);
+    FFT.ComplexToMagnitude(vReal, vImag, SAMPLES);
+    
+    u8g2.clearBuffer();  // Screen buffer clear
+    showScope();  // Spectrum Display
+    showGraphics();  // Scale line and other indications
+    show_mod();  //mode
+    u8g2.sendBuffer();  // 
+
+    delay(1);  //Repeat the process every second OR:
+    
+}
+
+//////////////////////////
+//Processing when STEP SW is pressed
+//////////////////////////
+void Mod_Stp()
+{
+  if(mod == 0){
+    mod = 1;
+  }
+  else{
+    mod = 0;
+  }
+  delay(10);
+  //Step_Disp(STEP);
+  while(digitalRead(MOD_BUTTON) == LOW){
+    delay(10);
+  }
+}
+
+//////////////////////////
+//Band scope display
+//////////////////////////
+void showScope() {  // Spectrum Display
+  int d, d1, d2;
+  
+  for (int xi = 1; xi < 64; xi++) {  // Positive frequency spectrum display
+      d1 = barLength(vReal[xi*2]);
+      d2 = barLength(vImag[xi*2+1]);
+    d = sqrt(d1 * d1 + d2 * d2);
+    u8g2.drawVLine(xi + 64 , PY1 - d, d);  
+  }
+  for (int xi = 64; xi < 128; xi++) { // Negative frequency spectrum display
+      d1 = barLength(vReal[xi*2]);
+      d2 = barLength(vImag[xi*2+1]);
+    d = sqrt(d1 * d1 + d2 * d2);
+    u8g2.drawVLine(xi - 64 , PY1 - d, d); 
+  }
+}
+
+//////////////////////////
+//LSB/USB switching
+//////////////////////////
+void show_mod() {  // Spectrum Display
+  u8g2.setFont(u8g2_font_micro_tr);  // Small font(3x5)
+  if ( mod == 0 ){
+    u8g2.drawStr(0, 0, "LSB");       //
+  } else {
+    u8g2.drawStr(117, 0, "USB");       //
+  }
+}
+
+//////////////////////////
+//Graph Length
+//////////////////////////
+int barLength(double d) {  // Calculate the length of the graph
+  float fy;
+  int y;
+
+  fy = 14.0 * (log10(d) + 3.3);  //3.3 14
+  y = fy;
+  y = constrain(y, 0, 22);  // Cut off upper and lower limits
+
+  /*For Test*/
+  Serial.print(d, 4);
+  Serial.print(", ");
+  Serial.print(fy);
+  Serial.print(", ");
+  Serial.println(y);
+  
+  return y;
+}
+
+//////////////////////////
+//on-screen display
+//////////////////////////
+void showGraphics() {  // Modifying Graphs
+  // area demarcation line
+  //u8g2.drawHLine(0, PY1, 128);  // lower end of the spectrum
+  u8g2.drawHLine(0, 23, 128);  // Lower end line for waterfall 55
+  //u8g2.drawFrame(0, 0, 128, 13);
+  //u8g2.drawLine(63, 0, 63, 13);
+
+  // Frequency scale (horizontal axis)
+  u8g2.drawBox(PX1 - 24, PY2, 2, 2);  // Positive Frequency 10kscale
+  u8g2.drawBox(PX1 - 46, PY2, 2, 2);  // Positive Frequency 20kscale
+
+  u8g2.drawBox(PX1, PY2, 2, 2);       // Negative frequency 0kscale
+  u8g2.drawBox(PX1 + 22, PY2, 2, 2);  // Negative frequency 10kscale
+  u8g2.drawBox(PX1 + 45, PY2, 2, 2);  // Negative frequency 20kscale
+
+  u8g2.setFont(u8g2_font_micro_tr);  // Small font(3x5)
+  u8g2.drawStr(9, 26, "-20k");       // Negative frequency display 58
+  u8g2.drawStr(32, 26, "-10k");
+
+  u8g2.drawStr(63, 26, "0");  // Positive Frequency
+  u8g2.drawStr(81, 26, "10k");
+  u8g2.drawStr(105, 26, "20k");
+  
+}