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UART & I2C slow down a loop - trix - Dec-23-2023
hello,
I am working on writing a program for a stepper motor with a driver (pulse/dir).
this is done with acc and decc.
in the part with the constant speed I create the pulses for the driver with a for loop.
but I need to be able to jump out of that for loop, with 2 conditions.
1 - I release the push button (touch screen)
2 - the limit switch has been reached (extended I/O board).
the first comes in via UART (touchscreen).
and the second comes in with I2C (extended I/O board).
now I do that with "polling" the UART and the I2C.
but this slows down the "loop".
Now this can be solved by using interrupts for the UART and the I2C.
but I had read somewhere that there was no interrupt for the UART. and I don't know if there is an interrupt for the I2C?
Does anyone here know how I can best solve this problem ?
thank you.
RE: UART & I2C slow down a loop - deanhystad - Dec-23-2023
Threads? Does your platform support them? With threading you would do the UART and I2C in one thread and the velocity loop in a different thread.
RE: UART & I2C slow down a loop - trix - Dec-24-2023
thank you.
I forgot to tell you that I use the raspberry pico.
I don't really know what you mean by threads, so i don't know ore the raspberry pico have them.
RE: UART & I2C slow down a loop - deanhystad - Dec-26-2023
Quote:I don't really know what you mean by threads, so i don't know ore the raspberry pico have them.Lots of pages came up when I googled "raspberry pi pico threading". Threading is something you should know about. It is very useful when trying to do multiple things at the same time.
RE: UART & I2C slow down a loop - trix - Dec-28-2023
ok using the 2nd core, that does indeed seem useful.
I've never worked with that before.
thanks for the input.