Hi all,
I've been using an Arduino UNO R3 to try and build a project. The basic rundown is as follows:
- 2-Potentiometers , one to control a motor, the other to control a servo
- An OLED screen shows the amount of throttle percentage for the motor
- The motor controller is an L298n and the screen is the fasizi 2.42 inch 128x64
display, also i am not using the Arduino board to power either the motor or servo.
I've used a combination of two codes on 2 separate boards and have tries to join them together using the information I've found with the Arduino forum. The codes worked perfect separately, however I have done something wrong when bringing them together.
In the two original codes, pins on the board would have clashed however i think ive now given everything an individual pin with the code.
Once together, the screen still works perfectly showing the amount of throttle percentage applied, but the potentiometers no longer send a signal to the motor or servo.
When I verify the code, it says it fine but clearly I've made a mistake somewhere.
`Apologies if I've not created this topic properly...
I Have provided the code below, with images of the separate projects.
Any help would be greatly appreciated.
Thanks in advance, Adam.
Images:
code:
#include <Wire.h>
#include "U8glib.h"
// if you are using SPI version of the display (with 7 pins), comment the first line and uncomment the second line
//U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0 | U8G_I2C_OPT_NO_ACK | U8G_I2C_OPT_FAST); // Fast I2C / TWI
U8GLIB_SSD1306_128X64 u8g(13, 11, 8, 9, 10); // SPI connection - SCL = 13, SDA = 11, RES = 10, DC = 9, CS = 8
// 'center_fill', 8x8px
const unsigned char bitmap_center_fill [] PROGMEM = {
0x00, 0x3c, 0x7e, 0x7e, 0x7e, 0x7e, 0x3c, 0x00
};
// 'center_outline', 8x8px
const unsigned char bitmap_center_outline [] PROGMEM = {
0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00
};
// 'gauge_bg', 72x64px
const unsigned char bitmap_gauge_bg [] PROGMEM = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x20, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0xff, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x20,
0x3c, 0x00, 0x3c, 0x04, 0x00, 0x00, 0x00, 0x00, 0x21, 0xc0, 0x00, 0x03, 0x84, 0x00, 0x00, 0x00,
0x00, 0x06, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0x00, 0x18, 0x40, 0x00, 0x02, 0x18, 0x00,
0x00, 0x00, 0x04, 0x20, 0x40, 0x00, 0x02, 0x04, 0x20, 0x00, 0x00, 0x04, 0xc0, 0x20, 0x00, 0x04,
0x03, 0x20, 0x00, 0x00, 0x01, 0x00, 0x20, 0x00, 0x04, 0x00, 0x80, 0x00, 0x00, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x84, 0x00, 0xef, 0x00, 0xcf, 0x00, 0x21, 0x00, 0x00, 0x48,
0x01, 0x09, 0x01, 0x29, 0x00, 0x12, 0x00, 0x00, 0x10, 0x01, 0xc9, 0x00, 0xc9, 0x00, 0x08, 0x00,
0x00, 0x20, 0x01, 0x29, 0x01, 0x29, 0x00, 0x04, 0x00, 0x00, 0x40, 0x01, 0x29, 0x01, 0x29, 0x00,
0x02, 0x00, 0x04, 0x40, 0x00, 0xcf, 0x00, 0xcf, 0x00, 0x02, 0x20, 0x02, 0x80, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x40, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x20, 0x00,
0x00, 0x00, 0x00, 0x00, 0x04, 0x80, 0x02, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x40, 0x22,
0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x44, 0x14, 0x01, 0x2f, 0x00, 0x00, 0x02, 0xf7, 0x80,
0x28, 0x04, 0x01, 0x29, 0x00, 0x00, 0x02, 0x94, 0x80, 0x20, 0x04, 0x01, 0xe9, 0x00, 0x00, 0x02,
0x94, 0x80, 0x20, 0x08, 0x00, 0x29, 0x00, 0x00, 0x02, 0x94, 0x80, 0x10, 0x08, 0x00, 0x29, 0x00,
0x00, 0x02, 0x94, 0x80, 0x10, 0xc8, 0x00, 0x2f, 0x00, 0x00, 0x02, 0xf7, 0x80, 0x13, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0xd0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x0b, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x10, 0x39, 0xe0,
0x00, 0x00, 0x00, 0x17, 0x3c, 0x08, 0x10, 0x05, 0x20, 0x00, 0x00, 0x00, 0x10, 0xa4, 0x08, 0x10,
0x09, 0x20, 0x00, 0x00, 0x00, 0x11, 0x24, 0x08, 0x17, 0x91, 0x20, 0x00, 0x00, 0x00, 0x12, 0x25,
0xe8, 0xd0, 0x21, 0x20, 0x00, 0x00, 0x00, 0x14, 0x24, 0x0b, 0x10, 0x3d, 0xe0, 0x00, 0x00, 0x00,
0x17, 0xbc, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x26,
0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x20, 0x02, 0x00, 0x1e, 0x00, 0x00, 0x29, 0x78, 0x00, 0x40, 0x02, 0x00, 0x12, 0x00, 0x00,
0x29, 0x48, 0x00, 0x40, 0x09, 0x00, 0x12, 0x00, 0x00, 0x2f, 0x48, 0x00, 0x90, 0x11, 0x00, 0x12,
0x00, 0x00, 0x21, 0x48, 0x00, 0x88, 0x00, 0x80, 0x12, 0x00, 0x00, 0x21, 0x48, 0x01, 0x00, 0x00,
0x40, 0x1e, 0x00, 0x00, 0x21, 0x78, 0x02, 0x00, 0x00, 0x40, 0x40, 0x00, 0x00, 0x00, 0x02, 0x02,
0x00, 0x00, 0x20, 0x80, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x01, 0x11, 0x00, 0x00, 0x00, 0x00,
0x00, 0x88, 0x80, 0x02, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x40, 0x00, 0x04, 0x00, 0x00,
0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00
};
// 'pwr_label', 16x6px
const unsigned char bitmap_pwr_label [] PROGMEM = {
B11110100, B01011110, //
B10010100, B01010010, //
B11110101, B01011100, //
B10000101, B01010010, //
B10000111, B11010010, //
B00000000, B00000000
};
// 'digit_0', 16x28px
const unsigned char bitmap_digit_0 [] PROGMEM = {
0x0f, 0xff, 0x1f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f,
0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f,
0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xff, 0xff,
0xff, 0xff, 0xff, 0xfe, 0xff, 0xfc, 0xff, 0xf8
};
// 'digit_1', 16x28px
const unsigned char bitmap_digit_1 [] PROGMEM = {
0x01, 0xf8, 0x03, 0xf8, 0x07, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8,
0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8,
0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8,
0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8
};
// 'digit_2', 16x28px
const unsigned char bitmap_digit_2 [] PROGMEM = {
0x0f, 0xfe, 0x1f, 0xff, 0x3f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f,
0xfc, 0x3f, 0x00, 0x3f, 0x00, 0x7f, 0x00, 0xff, 0x01, 0xfe, 0x03, 0xfc, 0x0f, 0xf8, 0x1f, 0xf0,
0x3f, 0xe0, 0x7f, 0xc0, 0xff, 0x00, 0xfe, 0x00, 0xfc, 0x00, 0xfc, 0x00, 0xfc, 0x00, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
// 'digit_3', 16x28px
const unsigned char bitmap_digit_3 [] PROGMEM = {
0x0f, 0xfe, 0x3f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x3f, 0xf8, 0x3f,
0xf8, 0x3f, 0x00, 0x3f, 0x00, 0x3f, 0x00, 0xfe, 0x00, 0xfc, 0x00, 0xf8, 0x00, 0xff, 0x00, 0xff,
0x00, 0xff, 0x00, 0x3f, 0x00, 0x3f, 0xf8, 0x3f, 0xf8, 0x3f, 0xf8, 0x3f, 0xfc, 0x3f, 0xff, 0xff,
0xff, 0xff, 0xff, 0xfe, 0xff, 0xfc, 0xff, 0xf8
};
// 'digit_4', 16x28px
const unsigned char bitmap_digit_4 [] PROGMEM = {
0x00, 0x70, 0x00, 0x78, 0x00, 0xfc, 0x00, 0xfe, 0x01, 0xff, 0x03, 0xff, 0x03, 0xff, 0x07, 0xff,
0x07, 0xff, 0x0f, 0xff, 0x0f, 0xbf, 0x1f, 0xbf, 0x1f, 0x3f, 0x3f, 0x3f, 0x3e, 0x3f, 0x7e, 0x3f,
0x7c, 0x3f, 0xfc, 0x3f, 0xff, 0xff, 0x7f, 0xff, 0x3f, 0xff, 0x3f, 0xff, 0x1f, 0xff, 0x00, 0x3f,
0x00, 0x3f, 0x00, 0x3f, 0x00, 0x3f, 0x00, 0x3f
};
// 'digit_5', 16x28px
const unsigned char bitmap_digit_5 [] PROGMEM = {
0x7f, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xfc, 0x00, 0xfc, 0x00,
0xfc, 0x00, 0xfc, 0x00, 0xfe, 0x00, 0xff, 0xf0, 0xff, 0xf8, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xff,
0x00, 0x3f, 0x00, 0x3f, 0x00, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x7f, 0xff, 0xff,
0xff, 0xff, 0x7f, 0xff, 0x3f, 0xff, 0x1f, 0xff
};
// 'digit_6', 16x28px
const unsigned char bitmap_digit_6 [] PROGMEM = {
0x0f, 0xfe, 0x1f, 0xff, 0x3f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f,
0xfc, 0x3f, 0xfc, 0x00, 0xfc, 0x00, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x7f, 0xff, 0xff,
0xff, 0xfe, 0xff, 0xfc, 0xff, 0xf8, 0xff, 0xf0
};
// 'digit_7', 16x28px
const unsigned char bitmap_digit_7 [] PROGMEM = {
0xff, 0xf0, 0xff, 0xf8, 0xff, 0xfc, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x3e, 0xf8, 0x7e,
0xf8, 0x7e, 0x00, 0xfc, 0x00, 0xfc, 0x00, 0xfc, 0x01, 0xf8, 0x01, 0xf8, 0x01, 0xf8, 0x03, 0xf0,
0x03, 0xf0, 0x07, 0xf0, 0x07, 0xe0, 0x07, 0xe0, 0x0f, 0xc0, 0x0f, 0xc0, 0x0f, 0xc0, 0x1f, 0x80,
0x1f, 0x80, 0x3f, 0x80, 0x3f, 0x00, 0x3f, 0x00
};
// 'digit_8', 16x28px
const unsigned char bitmap_digit_8 [] PROGMEM = {
0x0f, 0xfe, 0x1f, 0xfe, 0x3f, 0xfe, 0x7f, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xfc, 0x3e, 0xfc, 0x3e,
0xfc, 0x3e, 0xfc, 0x3e, 0xfc, 0x3e, 0xfc, 0x3e, 0xff, 0xfc, 0xff, 0xf8, 0x1f, 0xff, 0x7f, 0xff,
0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xff, 0xff,
0xff, 0xff, 0xff, 0xfe, 0xff, 0xfc, 0xff, 0xf8
};
// 'digit_9', 16x28px
const unsigned char bitmap_digit_9 [] PROGMEM = {
0x07, 0xff, 0x1f, 0xff, 0x3f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x3f, 0xfc, 0x3f,
0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x00, 0x3f, 0x00, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xfc, 0x3f, 0xff, 0xff,
0xff, 0xff, 0xff, 0xfe, 0xff, 0xfc, 0xff, 0xf8
};
// Array of all bitmaps for convenience. (Total bytes used to store images in PROGMEM = 800)
const int bitmap_allArray_LEN = 10;
const unsigned char* bitmap_allArray[10] = {
bitmap_digit_0,
bitmap_digit_1,
bitmap_digit_2,
bitmap_digit_3,
bitmap_digit_4,
bitmap_digit_5,
bitmap_digit_6,
bitmap_digit_7,
bitmap_digit_8,
bitmap_digit_9
};
// 'atu_logo', 16x4px -- this is a second way how to define images, by manually typing the bits with "B"
const unsigned char bitmap_atu_logo [] PROGMEM = {
B01111011, B11101001, //
B01001000, B10001001, //
B01111000, B10001001, //
B01001000, B10001111,
};
int speed = 0; // current speed
char speed_string[10]; // speed number value converted to c-style string (array of characters)
int speed_string_length; // length of the speed_string
int speed_string_start_pos; // start x position for the big numbers - calculated based on the number of digits
int needle_angle_deg = 45; // angle of the needle in degrees, based on potentiometer value
int needle_start_x; // needle start point, x position
int needle_start_y; // needle start point, y position
int needle_end_x; // needle end point, x position
int needle_end_y; // needle end point, y position
int needle_center_x = 36; // needle center position, x position
int needle_center_y = 36; // needle center position, y position
int needle_radius_big = 30; // lenght of needle
int needle_radius_small = 10; // lenght of "tail" of the needle
int needle_offset_x; // second line offset x
int needle_offset_y; // second line offset y
#include <Servo.h>
// Motor Control Pins
#define ENA 5 // Enable A
#define IN1 6 // Input 1
#define IN2 7 // Input 2
// Potentiometer Pins
#define POT_SERVO A0 // Potentiometer for servo
#define POT_MOTOR A1 // Potentiometer for motor
Servo servo;
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
void setup() {
u8g.setFont(u8g_font_tpssb); // set u8g font, although this is not used anywhere
u8g.setColorIndex(1); // set drawing color to white
pinMode(A1, INPUT); // set pin A1 as input to read potentiometer value later on
// Motor Pins
pinMode(ENA, OUTPUT);
pinMode(IN1, OUTPUT);
pinMode(IN2, OUTPUT);
// Servo Setup
servo.attach(4); // servo is connected to pin 4
// Initialize Serial communication
Serial.begin(9600);
}
void loop() {
speed = map(analogRead(A1), 0, 1023, 0, 100); // read potentiometer value and map it between 0-140 (mph)
itoa (speed, speed_string, 10); // convert speed integer to c-style string speed_string, decimal format
speed_string_length = strlen(speed_string); // get speed_string length
speed_string_start_pos = 99 - speed_string_length * 8; // start x position of the big numbers
needle_angle_deg = map(speed, 0, 100, 45, 200+40); // calculate the angle in degrees based on the speed value, between 45-315
needle_start_x = needle_radius_big * -sin(radians(needle_angle_deg)) + needle_center_x; // calculate needle start x position
needle_start_y = needle_radius_big * cos(radians(needle_angle_deg)) + needle_center_y; // calculate needle start y position
needle_end_x = needle_radius_small * -sin(radians(needle_angle_deg + 180)) + needle_center_x; // calculate needle end x position
needle_end_y = needle_radius_small * cos(radians(needle_angle_deg + 180)) + needle_center_y; // calculate needle end y position
// calculate offset for the second line for the needle, based on the needle slope
if ((needle_angle_deg > 45 && needle_angle_deg < 135) || (needle_angle_deg > 225 && needle_angle_deg < 315)) {
// needle is more horizontal, offset the second line by y
needle_offset_x = 0;
needle_offset_y = 1;
} else {
// needle is more vertical, offset the second line by x
needle_offset_x = 1;
needle_offset_y = 0;
}
u8g.firstPage(); // u8g drawing
do {
//u8g.drawStr(90, 20, speed_string); // draw speed_string, not needed anymore
for (int i = 0; i < speed_string_length; i++) { // loop for every speed_string character
// draw the big digit
// subtract value 45 from the character value, since the ASCII value of digit "0" is 48
u8g.drawBitmapP(speed_string_start_pos + 18 * i, 16, 16/8, 28, bitmap_allArray[speed_string[i] - 48]);
}
u8g.drawBitmapP( 0, 0, 72/8, 64, bitmap_gauge_bg); // draw gauge background image
u8g.drawLine(needle_start_x, needle_start_y, needle_end_x, needle_end_y); // draw first line for the needle
u8g.drawLine(needle_start_x+needle_offset_x, needle_start_y+needle_offset_y, needle_end_x+needle_offset_x, needle_end_y+needle_offset_y); // draw second line for the needle
u8g.setColorIndex(0); // black color
u8g.drawBitmapP( 32, 33, 8/8, 8, bitmap_center_fill); // draw needle center cover
u8g.setColorIndex(1); // white color
u8g.drawBitmapP( 32, 33, 8/8, 8, bitmap_center_outline); // draw needle center piece
u8g.drawBitmapP( 93, 46, 16/8, 6, bitmap_pwr_label); // draw pwr label
u8g.drawBitmapP( 26, 60, 16/8, 4, bitmap_atu_logo); // draw atu logo, feel free to comment out and put your own logo here :)
}
while ( u8g.nextPage() ); // draw next page, explained here - https://youtu.be/sFGsYZ0Hszk
}
#include <Wire.h>
#include <Servo.h>
// Motor Control Pins
#define ENA 5 // Enable A
#define IN1 6 // Input 1
#define IN2 7 // Input 2
// Potentiometer Pins
#define POT_SERVO A0 // Potentiometer for servo
#define POT_MOTOR A1 // Potentiometer for motor
// Variables
int motorSpeed;
int servoAngle;
void loop2() {
// Read potentiometer values
servoAngle = map(analogRead(POT_SERVO), 0, 1023, 0, 180);
motorSpeed = map(analogRead(POT_MOTOR), 0, 1023, 0, 255);
// Control servo
servo.write(servoAngle);
// Control motor speed
analogWrite(ENA, motorSpeed);
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
delay(0); // Adjust delay as needed
}