Hi everyone,
I am trying to display some text on OLED display but unable to do so. I am integrating the adafruit ssd1306 library with freeRTOS to do multitasking but seems like the code stucks somewhere.
I am attaching the code as well for your reference.
#include <Arduino_FreeRTOS.h>
#include <avr/io.h>
#include <SPI.h>
#include <Adafruit_GFX.h> //Includes core graphics library
#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)
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
static Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
void setup() {
Serial.begin(115200);
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
xTaskCreate(oledDisplayHandler, "OLEDHandler",128,NULL,1,NULL);
} // setup
void sendOLEDWelcomeText(){
// Clear the buffer
display.clearDisplay();
display.setTextSize(2); // Normal 1:1 pixel scale
display.setTextColor(WHITE); // Draw white text
display.setCursor(0,0); // Start at top-left corner
display.println(F(" masifamu"));
display.display();
}
void oledDisplayHandler(void *pvParameters){
sendOLEDWelcomeText();
while(1){
Serial.println("FreeRTOS");
vTaskDelay(pdMS_TO_TICKS(100));
}
}
// main code here, to run repeatedly:
void loop() {
} // loop
Seems like thread does not start because i don’t see FreeRTOS string over serial.
If i do it without FreeRTOS it works fine, code without freeRTOS is given below.
#include <avr/io.h>
#include <SPI.h>
#include <Adafruit_GFX.h> //Includes core graphics library
#include <Adafruit_SSD1306.h>
#include <EEPROM.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)
#define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
void setup() {
Serial.begin(9600);
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
sendOLEDWelcomeText();
} // setup
// main code here, to run repeatedly:
void loop() {
} // loop
void sendOLEDWelcomeText(){
// Clear the buffer
display.clearDisplay();
display.setTextSize(2); // Normal 1:1 pixel scale
display.setTextColor(WHITE); // Draw white text
display.setCursor(0,0); // Start at top-left corner
display.println(F(" masifamu"));
display.display();
delay(1000);
}
Someone please help me understand where i am going wrong?
Thanks.
