problems with code.

Archiver

I am trying to take the output voltage from one pin and use that as an input
voltage for another pin. This is going to be used to determine the level of
water in a cup. Basically I need to get the value of pin1 to see if it has
been set high. If it has then I need to turn pin2 to high. From the lines
below I am not sure if I can do

if pin1 = 1 then... ? Or is it looking for an actual voltage value to
compare it to?


Thanks guys!

---- below is my code. Thank you very much! ----


'{$stamp bs1}

output pin0 ' output voltage
high pin0

input pin1 ' waiting voltage.

output pin2 ' toggle voltage.
low pin2



loop:

if pin1 = 1 then pump_off ' Check to see if set high
if pin1 < 1 then pump_on ' Check to see if set low


pump_on:
high pin2
goto pump_on

pump_off:
low pin2
goto pump_off

Archiver

It is easier using IN and OUT command than HIGH, LOW for this task:


Input 1
Output 2

'set output 2 = input 1
OUT2 = IN1

That solve it?
-Martin



--- In basicstamps@y..., "Henk Visser" <henk@h...> wrote:
>
> I am trying to take the output voltage from one pin and use that as
an input
> voltage for another pin. This is going to be used to determine the
level of
> water in a cup. Basically I need to get the value of pin1 to see
if it has
> been set high. If it has then I need to turn pin2 to high. From
the lines
> below I am not sure if I can do
>
> if pin1 = 1 then... ? Or is it looking for an actual voltage value
to
> compare it to?
>
>
> Thanks guys!
>
> ---- below is my code. Thank you very much! ----
>
>
> '{$stamp bs1}
>
> output pin0 ' output voltage
> high pin0
>
> input pin1 ' waiting voltage.
>
> output pin2 ' toggle voltage.
> low pin2
>
>
>
> loop:
>
> if pin1 = 1 then pump_off ' Check to see if set high
> if pin1 < 1 then pump_on ' Check to see if set low
>
>
> pump_on:
> high pin2
> goto pump_on
>
> pump_off:
> low pin2
> goto pump_off

Archiver

martin,

How would I put that into an 'if' condition so I can branch? ( I am also
using the BS1 )

Thanks.

---

It is easier using IN and OUT command than HIGH, LOW for this task:


Input 1
Output 2

'set output 2 = input 1
OUT2 = IN1

That solve it?
-Martin



--- In basicstamps@y..., "Henk Visser" <henk@h...> wrote:
>
> I am trying to take the output voltage from one pin and use that as
an input
> voltage for another pin. This is going to be used to determine the
level of
> water in a cup. Basically I need to get the value of pin1 to see
if it has
> been set high. If it has then I need to turn pin2 to high. From
the lines
> below I am not sure if I can do
>
> if pin1 = 1 then... ? Or is it looking for an actual voltage value
to
> compare it to?
>
>
> Thanks guys!
>
> ---- below is my code. Thank you very much! ----
>
>
> '{$stamp bs1}
>
> output pin0 ' output voltage
> high pin0
>
> input pin1 ' waiting voltage.
>
> output pin2 ' toggle voltage.
> low pin2
>
>
>
> loop:
>
> if pin1 = 1 then pump_off ' Check to see if set high
> if pin1 < 1 then pump_on ' Check to see if set low
>
>
> pump_on:
> high pin2
> goto pump_on
>
> pump_off:
> low pin2
> goto pump_off


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Archiver

Hi Henk,

Your own BS1 code is fine, except that it will get stuck in a little
loop that doesn't ever again test the state of the input pin.

pumpLoop:
If pin1=1 then pump_off
pump_on:
high pin2
goto pumpLoop
pump_off:
low pin2
goto pumpLoop

The stamp, even the BS1, gives you a lot of ways to do things. As you
surmised, pin1 can have only two values, 0 and 1, and that depends on
the input voltage being above or below the threshold level of about
1.3 volts.

You can write the "if" condition without the equals sign, because the
Stamp understands any non-zero value as True:

If pin1 then pump_off ' branches when pin1=1

You can alternatively use the BRANCH command, which often gives code
that is easier to read:

branch pin1,(pump_on,pump_off) ' two states

Martin's suggestion is the most efficient, because it translates the
input state on one pin directly to the output state of another pin.
Here it is in BS1 syntax:

pins=%00000010 ' set pin1 high, all others low
dirs=%11111011 ' pin2 is the only input, all others output
pumpLoop:
pin1=1-pin2 ' transfer pin, invert (0-->1 and 1-->0)
goto pumpLoop

-- regards
Tracy Allen
electronically monitored ecosystems
http://www.emesystems.com
mailto:tracy@e...


>martin,
>
>How would I put that into an 'if' condition so I can branch? ( I am also
>using the BS1 )
>
>Thanks.
>
>
>
>

---

>It is easier using IN and OUT command than HIGH, LOW for this task:
>
>
>Input 1
>Output 2
>
>'set output 2 = input 1
>OUT2 = IN1
>
>That solve it?
>-Martin
>
>
>
>--- In basicstamps@y..., "Henk Visser" <henk@h...> wrote:
>>
>> I am trying to take the output voltage from one pin and use that as
>an input
>> voltage for another pin. This is going to be used to determine the
>level of
>> water in a cup. Basically I need to get the value of pin1 to see
>if it has
>> been set high. If it has then I need to turn pin2 to high. From
>the lines
>> below I am not sure if I can do
>>
>> if pin1 = 1 then... ? Or is it looking for an actual voltage value
>to
>> compare it to?
>>
>>
>> Thanks guys!
>>
>> ---- below is my code. Thank you very much! ----
>>
>>
>> '{$stamp bs1}
>>
>
> > output pin0 ' output voltage
>> high pin0
>>
>> input pin1 ' waiting voltage.
>>
>> output pin2 ' toggle voltage.
>> low pin2
>>
>>
>>
>> loop:
>>
>> if pin1 = 1 then pump_off ' Check to see if set high
>> if pin1 < 1 then pump_on ' Check to see if set low
> >
> >
> > pump_on:
> > high pin2
> > goto pump_on
> >
> > pump_off:
> > low pin2
> > goto pump_off