Is there a way to read OUTA?

TC

Hello all,

I am wondering if it is possible to read the state of OUTA of the actual output pin? In the manual it says you can, but that only works if the current COG is controlling the I/O pin. I want to display if a heater is on or not, just an indicator on the display. If the character is on, then the heater is on. If the character is off, then the heater is off.

   IF OUTA[Heater] == 1
     Display.tx($DB)

   ELSE
     Display.tx($20)

Thanks
TC

Duane Degn

I think you can use ina this way. It should tell you if the pin is high or low. (At least I'm pretty sure almost positive it does.)

TC

That did it, Thank you so much Duane

tonyp12

Only the cog that sets it's own OUTA can read what it have set it to.
It's not really the actual state of the pin that you read, as DIRA would also have to be set for your cog to affect the pin.

You can use INA to read the actual electrical pin state, unless there is a short somewhere the state will reflect: if Any Cog have DIRA=1 and OUTA=1 for this pin it will be a 1
As if any other cog also use the same pin, a high state is ORed

TC

tonyp12 wrote: »

Only the cog that sets it's own OUTA can read what it have set it to.
It's not really the actual state of the pin that you read, as DIRA would also have to be set for your cog to affect the pin.

You can use INA to read the actual electrical pin state, unless there is a short somewhere the state will reflect: if Any Cog have DIRA=1 and OUTA=1 for this pin it will be a 1
As if any other cog also use the same pin, a high state is ORed

The INA works like a charm for what I needed.

    if ina[upper_heater] == 1 AND ina[Lower_Heater] == 1
      Display.tx($CD)

    elseif ina[upper_heater] == 1 AND ina[Lower_Heater] == 0
      Display.tx($DF)

    elseif ina[Upper_Heater] == 0 AND ina[Lower_Heater] == 1
      Display.tx($DC)

    else     
      Display.tx($20)

Thank you

Tracy Allen

Yes, ina[.] always reads the actual state of the pin, whether that be controlled from inside or outside the prop.

OTOH, X := outa[.] reads the state of the output latch for a particular cog, and that only affects the output if the corresponding dira[.] is set to ouput, and all other output sources (cogs and counters) are permissive.

TC

Tracy Allen wrote: »

Yes, ina[.] always reads the actual state of the pin, whether that be controlled from inside or outside the prop.

OTOH, X := outa[.] reads the state of the output latch for a particular cog, and that only affects the output if the corresponding dira[.] is set to ouput, and all other output sources (cogs and counters) are permissive.

That makes sense now, thanks.