Diff: main.cpp

Revision:

0:806ae74bb791

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 13 16:07:39 2021 +0000
@@ -0,0 +1,110 @@
+/* Moving the rectangle previewed on the OLED display
+ * by using potentiometers POT1 and POT2
+ * 
+ * November, 2021.
+ */
+#include "mbed.h"
+#include "Adafruit_GFX.h"
+#include "Adafruit_GFX_Config.h"
+#include "Adafruit_SSD1306.h"
+ 
+// I2C bus pins:
+#define D_SDA                                                              PB_14 
+#define D_SCL                                                              PB_13     
+// I2C address, 60d or 0x3c:
+#define I2C_REAL_ADD                                                        0x3c
+#define I2C_ADDRESS                                            I2C_REAL_ADD << 1 
+// Set OLED width and heigth [pixel]:
+#define OLED_WIDTH_PX                                                        128
+#define OLED_HEIGHT_PX                                                        64
+// I2C frequency:
+#define I2C_FREQUENCY                                                     400000
+// Multipliers of POT1 and POT2 for OLED rectangle position:
+#define WIDTH_SCALER                                                         128
+#define HEIGHT_SCALER                                                         64
+// Initial rectangle position:
+#define INITIAL_X_POSITION                                     OLED_WIDTH_PX / 2
+#define INITIAL_Y_POSITION                                    OLED_HEIGHT_PX / 2
+// Refresh rate:
+#define REFRESH_RATE_MS                                                        5
+// Half of the potentiometer return value: 
+#define HALF_INTERVAL                                                       0.5f
+// x and y max values
+#define XMAX                                                                 127
+#define YMAX                                                                  63
+#define XMIN                                                                   0
+#define YMIN                                                                   0   
+ 
+// Initialize potentiometers' pins:
+AnalogIn POT1(PA_0);
+AnalogIn POT2(PA_1);
+ 
+// Initialize I2C:
+I2C i2c(D_SDA,D_SCL);
+ 
+// Initialize OLED display:
+Adafruit_SSD1306_I2c myOled(i2c,PB_5,I2C_ADDRESS,OLED_HEIGHT_PX,OLED_WIDTH_PX);
+
+void screenSaver(){
+    int x = 7, y = 12, r = 5, xk = 1, yk = 1, dx = 4, dy = 3;
+    
+    while(true){
+        myOled.drawRect(0, 0, OLED_WIDTH_PX - 1, OLED_HEIGHT_PX - 1, WHITE);
+        
+        if((x - r) <= XMIN) xk = 1;
+        if((x + r) >= XMAX) xk = -1;
+        
+        if((y - r) <= YMIN) yk = 1;
+        if((y + r) >= YMAX) yk = -1;
+        
+        y += dy * yk;
+        x += dx * xk;      
+        
+        myOled.fillCircle(x, y, r, WHITE);
+        
+        myOled.display();
+        
+        wait_ms(REFRESH_RATE_MS);
+        myOled.clearDisplay();
+    }     
+}
+
+void bounce(){
+     int x = 7, y = 12, r = 5, xk = 1, yk = 1, dx = 4, dy = 3, g = 3;
+     
+    while(true){
+        myOled.drawRect(0, 0, OLED_WIDTH_PX - 1, OLED_HEIGHT_PX - 1, WHITE);
+        
+        if((x - r) <= XMIN) xk = 1;
+        if((x + r) >= XMAX) xk = -1;
+        
+        if((y + r) <= YMAX){
+            dy += g;
+            y += dy;
+        } else {
+            dy = -dy;
+            y = 2 * YMAX - y;
+        }
+        
+        y += dy * yk;
+        x += dx * xk;      
+        
+        myOled.fillCircle(x, y, r, WHITE);
+        
+        myOled.display();
+        
+        wait_ms(REFRESH_RATE_MS);
+        myOled.clearDisplay();
+    }
+}
+ 
+int main() {
+  
+//    Initialize OLED:
+    myOled.begin();
+    myOled.setTextCursor(0, 0);    
+    i2c.frequency(I2C_FREQUENCY);
+    
+    //screenSaver();
+    bounce();
+}
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