Lazarus
Programming => General => Topic started by: Mi-Ki on June 14, 2018, 09:18:15 am
Title:
fpsystem - linux
Post by:
Mi-Ki
on
June 14, 2018, 09:18:15 am
Hello.
I have an MCP23017 expander.
This works
fpsystem('sudo i2cset -y 1 0x21 0x13 0x00');
fpsystem('sudo i2cset -y 1 0x21 0x13 0xFF');
How to read the expander status?
This does not work
Code: Pascal
[Select]
[+]
[-]
Var
S
:
Integer
;
begin
S
:
=
fpsystem
(
'sudo i2cget -y 1 0x21 0x13'
)
;
Label1
.
Caption
:
=
IntToStr
(
S
)
;
end
;
Title:
Re: fpsystem - linux
Post by:
mig-31
on
June 14, 2018, 01:06:35 pm
If i2cget return result to the pipe, use TProcess to read pipe output.
http://wiki.freepascal.org/Executing_External_Programs#TProcess (http://wiki.freepascal.org/Executing_External_Programs#TProcess)
Title:
Re: fpsystem - linux
Post by:
Mi-Ki
on
June 14, 2018, 06:55:28 pm
It works, thank you :D
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