unsigned long oddity

[saffer]

Hi All,

I'm not the most brilliant Arduino programmer, and still getting to grips with a lot of the code.
Been playing with the millis() function.

I have two variables configured as unsigned long

unsigned long PreFlowDelayMs = 0;
unsigned long currPreFlowMs = millis();

Part of my code which is in a timing loop is supposed to take the value of currPreFlowMs and essentially assign that value to PreFlowDelayMs .

As in the section of code.

PreFlowDelayMs = currPreFlowMs;

Tracing the code, I note that the value of currPreFlowMs is never assigned to PreFlowDelayMs .

Before I post a lot of code, maybe someone has come across this and has an answer.

Thanx.

[anon73444976]

Just post the code.

[RayLivingston]

Are you perhaps somehow imagining that currPreFlowMs somehow gets magically updated each time mullis changes? It does not. You have to explicitly update it whenever necessary.

[anon73444976]

Or maybe you've got a scope issue.
Post. The. Code.

[anon57585045]

PreFlowDelayMs = currPreFlowMs;
Tracing the code, I note that the value of currPreFlowMs is never assigned to PreFlowDelayMs .

Really? Try examining it immediately afterwards:

PreFlowDelayMs = currPreFlowMs;
Serial.println(PreFlowDelayMs);
Serial.println(currPreFlowMs);

If neither values gets printed, you just messed up somewhere and your code skips the lines entirely.