Change PIN at Runtime

[PeWa]

In many examples we can use for example a #Define Pin_to_Use PIN_D1.

This is used when compiler generate the code.

However I have seen an example of change the PIN in runtime like this:

[PeWa]

[temtronic]

doing it as shown ,will require time to get the desired pin and insert into the output function

why not just ...

#DEFINE this_pin PIN_B2;
#DEFINE that_pin PIN_B4;
...
...
output_low(this_pin);
output_low(that_pin);
...
...
it 'should be faster'.....

[PCM programmer]

[bkamen]

You can also use the get_env for the PORT and LAT register addresses.

Then build a struct as you like with a default set of values.

Then just write those values to PORT/LAT registers on start up.

You end up configuring an entire register with a single write.

I'd have to go look at an old example to see how much ASM results.... but it should be pretty thin.
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Dazed and confused? I don't think so. Just "plain lost" will do. :D