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Altera_Forum
Honored Contributor
Honored ContributorTrigger and counter.
Hi,
I'm trying to implement a counter that counts down when it recieves a trigger pulse from the hardware (in this case, it's a short burst of AC, in the order of a few hundred µs), which keeps an LED on. I have no idea why my code isn't working, I'm pretty new to C programming. Any help greatly appreciated.if (trigger_reg == 1){ //goes to 1 when the AC signal reaches the trigger module threshold
int countdown = 10000000; //arbitrary value
while (countdown > 0){ //use this loop to keep the LED on longer than the trigger pulse, so the user can see it
green_leds=1;
countdown--;
}
} else {
green_leds=0;
}13 Replies
Altera_ForumA wild guess here.
Compile with no optimization at all. The optimizer may be shrinking all the code to almost nothing if the variables are not declared volatile.- Altera_Forum
You should implement this circuit in hardware - verilog or vhdl.
- Altera_Forum--- Quote Start --- You should implement this circuit in hardware - verilog or vhdl. --- Quote End --- What if the OP wants to make a bigger design and this is just a first step? Yes a HDL solution would work, but you need to be able to understand the languages and hardware design, which not everyone does or wants to invest in.
