March 2, 2023, 1:54pm
On an OpenMV M7 board, I detect blobs. Then I want to set a pin high if there are any blobs.
I do that like this
p_out = Pin("P0", Pin.OUT_PP)
and then, later in the code after blob detection (which I can see works in the terminal with the print()-statement) in the looping part of the script:
if blobs != :
The raspbarry that the OpenMV board is connected to does not detect any signal except for an occational blip that appears unrelated to the presence of blobs.
I have tested that i
can detect by passing power to it from a different source, so the issue must be the OpenMV. Am I doing something wrong?
please use p_out.value=(True) or p_out.value=(False)
also make sure that this is ‘P0’ and not “P0”.
make sure grounds are connected too.
use pullup/down resistors also.
March 2, 2023, 7:34pm
Thank you for your reply.
Connecting gnd removed the random blips.
There is no luck getting a high signal through, though. If I connect the signal wire to 3.3v on the openMV I can see that as a signal proving there is a circuit.
p_out.value=(True) triggers an error as you can see bellow.
Just to be sure… I assume setting p0 to high/true means that the pin that has p0 printed next to it on the board will be set to high, right? There is no BCM/board switching as on raspberry or anything like that, right?
p_out.value=True or p_out.value=False
March 3, 2023, 12:39pm
I think that is exactly what I am doing,
The document you link to says:
You can also use strings:
g = pyb.Pin(‘X1’, pyb.Pin.OUT_PP)
And I do this:
from pyb import Pin
p_out = Pin('P1', Pin.OUT_PP)
Since I only import Pin and not all of pyp, I don’t have to write pyb.Pin, but only Pin.
The switching of the pin that
@oramafanis mentions is also there - but that returns the shown error:
value ]) ¶
Get or set the digital logic level of the pin:
With no argument, return 0 or 1 depending on the logic level of the pin.
value given, set the logic level of the pin.
value can be anything that converts to a boolean. If it converts to
True, the pin is set high, otherwise it is set low.
It seems to me I am doing this exactly as the doc says I should - why doesn’t it work?
THESE SHOULD WORK!
i was from phone and didnt remember
without " = "