Nikola Cvetković / Mbed 2 deprecated 19E042PIM_V3_Z2

Program allows for a rectangle displayed on SSD1306-based OLED display to be moved by x- and y-axis uisng two user potentiometers.

Dependencies:   mbed Adafruit_GFX

main.cpp@9:46f39b99737b, 2021-11-20 (annotated)

Committer:
tzwell
Date:
Sat Nov 20 13:09:32 2021 +0000
Revision:
9:46f39b99737b
Parent:
8:ead6147e31a4 
First publish, first commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tzwell 9:46f39b99737b 1 /* Moving the rectangle previewed on the OLED display
tzwell 9:46f39b99737b 2 * by using potentiometers POT1 and POT2
tzwell 9:46f39b99737b 3 *
tzwell 9:46f39b99737b 4 * November, 2021.
tzwell 9:46f39b99737b 5 */
joeata2wh 0:befb557584fb 6 #include "mbed.h"
tzwell 9:46f39b99737b 7 #include "Adafruit_GFX.h"
tzwell 9:46f39b99737b 8 #include "Adafruit_GFX_Config.h"
tzwell 9:46f39b99737b 9 #include "Adafruit_SSD1306.h"
joeata2wh 0:befb557584fb 10
tzwell 9:46f39b99737b 11 // I2C bus pins:
tzwell 9:46f39b99737b 12 #define D_SDA PB_14
tzwell 9:46f39b99737b 13 #define D_SCL PB_13
tzwell 9:46f39b99737b 14 // I2C address, 60d or 0x3c:
tzwell 9:46f39b99737b 15 #define I2C_REAL_ADD 0x3c
tzwell 9:46f39b99737b 16 #define I2C_ADDRESS I2C_REAL_ADD << 1
tzwell 9:46f39b99737b 17 // Set OLED width and heigth [pixel]:
tzwell 9:46f39b99737b 18 #define OLED_WIDTH_PX 128
tzwell 9:46f39b99737b 19 #define OLED_HEIGHT_PX 64
tzwell 9:46f39b99737b 20 // I2C frequency:
tzwell 9:46f39b99737b 21 #define I2C_FREQUENCY 400000
tzwell 9:46f39b99737b 22 // Multipliers of POT1 and POT2 for OLED rectangle position:
tzwell 9:46f39b99737b 23 #define WIDTH_SCALER 128
tzwell 9:46f39b99737b 24 #define HEIGHT_SCALER 64
tzwell 9:46f39b99737b 25 // Initial rectangle position:
tzwell 9:46f39b99737b 26 #define INITIAL_X_POSITION OLED_WIDTH_PX / 2
tzwell 9:46f39b99737b 27 #define INITIAL_Y_POSITION OLED_HEIGHT_PX / 2
tzwell 9:46f39b99737b 28 // Refresh rate:
tzwell 9:46f39b99737b 29 #define REFRESH_RATE_MS 5
tzwell 9:46f39b99737b 30 // Half of the potentiometer return value:
tzwell 9:46f39b99737b 31 #define HALF_INTERVAL 0.5f
joeata2wh 0:befb557584fb 32
tzwell 9:46f39b99737b 33 // Initialize potentiometers' pins:
tzwell 9:46f39b99737b 34 AnalogIn POT1(PA_0);
tzwell 9:46f39b99737b 35 AnalogIn POT2(PA_1);
tzwell 9:46f39b99737b 36
tzwell 9:46f39b99737b 37 // Initialize I2C:
tzwell 9:46f39b99737b 38 I2C i2c(PB_14,PB_13);
tzwell 9:46f39b99737b 39
tzwell 9:46f39b99737b 40 // Initialize OLED display:
tzwell 9:46f39b99737b 41 Adafruit_SSD1306_I2c myOled(i2c,PB_5,I2C_ADDRESS,OLED_HEIGHT_PX,OLED_WIDTH_PX);
joeata2wh 0:befb557584fb 42
joeata2wh 0:befb557584fb 43 int main() {
tzwell 9:46f39b99737b 44
tzwell 9:46f39b99737b 45 // Initialize OLED:
tzwell 9:46f39b99737b 46 myOled.begin();
tzwell 9:46f39b99737b 47 int x, y = 0;
tzwell 9:46f39b99737b 48 // i2c.frequency(I2C_FREQUENCY);
tzwell 9:46f39b99737b 49 while(true) {
tzwell 9:46f39b99737b 50 // #ifdef GFX_WANT_ABSTRACTS
tzwell 9:46f39b99737b 51 x = (POT1 - HALF_INTERVAL)*WIDTH_SCALER;
tzwell 9:46f39b99737b 52 y = (POT2 - HALF_INTERVAL)*HEIGHT_SCALER;
tzwell 9:46f39b99737b 53 myOled.fillRect(x, y, OLED_WIDTH_PX, OLED_HEIGHT_PX, WHITE);
tzwell 9:46f39b99737b 54 myOled.display();
tzwell 9:46f39b99737b 55 // #endif
tzwell 9:46f39b99737b 56 wait_ms(REFRESH_RATE_MS);
tzwell 9:46f39b99737b 57 myOled.clearDisplay();
joeata2wh 0:befb557584fb 58 }
joeata2wh 0:befb557584fb 59 }
joeata2wh 0:befb557584fb 60