开云体育

Gordon:

Add this line to line 73 in vent.h

??? extern char *__brkval;????????// leading double-underscore to prevent name collisions

and around line 139 in the same file, insert:

??? int freeMemory();???????????? // Function prototype

Add this line around line 101 in the INO file:

????char *__brkval;

Finally, add this function block to the INO file around line 179:

/

?? Purpose: To measure the runtime amount of SRAM memory available at the point where called

?? Parameter list:

??????? void

?? Return value:

??????? int??????? the amount of remaining free SRAM at the point called

?? CAUTION: ?????? Function assumes that Arduino.h is #include'd in the project

/

int freeMemory()

{

? char top;

? return __brkval ? &top - __brkval : &top - __malloc_heap_start;
}

When you wish to measure SRAM at a point in the program, insert:

? Serial.print("============ free memory: ");
? Serial.println(freeMemory());

I cannot test it on the vent code because of the runtime test for the pressure sensor, which hangs my system.

Let me know if it doesn't work.

Jack, W8TEE