[Solved] Thread definition not found , during compilation

Troubleshooting
1

Hi .
Actually I am using the Particle Photon for last 10 months . I know how to compile and flash .
I am compiling the code on https://build.particle.io
I was using the "Thread" in my code for long time. It was being compiled previously without any problem

But suddenly from last 2 days the same code has started giving error .

==========================================

ledblink.cpp:25:1: error: 'Thread' does not name a type
LED_PARAM ledParams[3] = {
^
==========================================

For example if I compile below code -

==========================================

#include "application.h"


// LED Param, defines pin and delay between blinks
typedef struct {
    int pin;
    int delay;
} LED_PARAM;

// LED pins
int led1 = D5;
int led2 = D3;
int led3 = D1;

// Defines thread parameters
LED_PARAM ledParams[3] = {
    {led1, 500},
    {led2, 1000},
    {led3, 2000}
};

Thread* led1Thread;
Thread* led2Thread;
Thread* led3Thread;

os_thread_return_t ledBlink(void* param){
    LED_PARAM *p = (LED_PARAM*)param;
    
    // Start never ending loop
    for(;;) {
        Serial.print("Thread Parameters: ");
        Serial.print(p->pin);
        Serial.print(", ");
        Serial.println(p->delay);
        
        // Blink led
        digitalWrite(p->pin, HIGH);
        delay(p->delay);
        digitalWrite(p->pin, LOW);
        delay(p->delay);
    }
}

void setup() {
    Serial.begin(115200);
    
    // Set pin mode
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    
    // Start new threads
    led1Thread = new Thread("sample", ledBlink, &ledParams[0]);
    led2Thread = new Thread("sample", ledBlink, &ledParams[1]);
    led3Thread = new Thread("sample", ledBlink, &ledParams[2]);
}

void loop() {
    // Nothing here.
}

==========================================

Then I got below compilation output -

==========================================
32+0 records in
32+0 records out
32 bytes (32 B) copied, 7.6585e-05 s, 418 kB/s
4+0 records in
4+0 records out
4 bytes (4 B) copied, 0.0504288 s, 0.1 kB/s
ledblink.cpp:22:1: error: 'Thread' does not name a type
 LED_PARAM ledParams[3] = {
 ^

ledblink.cpp:23:1: error: 'Thread' does not name a type
     {led1, 500},
 ^

ledblink.cpp:24:1: error: 'Thread' does not name a type
     {led2, 1000},
 ^

ledblink.cpp: In function 'void setup()':
ledblink.cpp:53:5: error: 'led1Thread' was not declared in this scope
     // Set pin mode
     ^

ledblink.cpp:53:22: error: expected type-specifier before 'Thread'
     // Set pin mode
                      ^

ledblink.cpp:53:22: error: expected ';' before 'Thread'
ledblink.cpp:54:5: error: 'led2Thread' was not declared in this scope
     pinMode(led1, OUTPUT);
     ^

ledblink.cpp:54:22: error: expected type-specifier before 'Thread'
     pinMode(led1, OUTPUT);
                      ^

ledblink.cpp:54:22: error: expected ';' before 'Thread'
ledblink.cpp:55:5: error: 'led3Thread' was not declared in this scope
     pinMode(led2, OUTPUT);
     ^

ledblink.cpp:55:22: error: expected type-specifier before 'Thread'
     pinMode(led2, OUTPUT);
                      ^

ledblink.cpp:55:22: error: expected ';' before 'Thread'
make[2]: *** [../build/target/user/platform-0-lledblink.o] Error 1
make[1]: *** [user] Error 2
make: *** [main] Error 2
Error: Could not compile. Please review your code.

==========================================

Anybody can please help me whats wrong ?

I have already tried below steps -

  1. Clearing the cache
  2. Creating new App
2

Make sure you’ve selected a Photon as your target device.

4 Likes
3

Oh yes … this solved the issue.
I just selected the target device .
Thanks.

4

Thanks @Moors7 for the help!