ST7789_t3 library with non-hardware SPI port

[jhendrix]

I'm trying to run 2 240x240 screens that don't have the CS pin.
I can get 1 to run fine on the hardware SPI, but since they don't have CS pins, I was trying to use non hardware SPI pins.
When I run the code, it hangs and eventually resets.
It does this during the init call, which calls the commonInit() function.
Using prints, I can trace the code all the way down to waitTransmitComplete()
In there, when it executes the line
_pimxrt_spi->CR = LPSPI_CR_MEN | LPSPI_CR_RRF; // Clear RX FIFO
it hangs.
So I guess the 1st question is can this library do a soft SPI port? (bit-bang)
If so, what am I doing wrong, if not, are there other options to get 2 non-cs displays working?
(another option would to put a mux on the spi clock pin and steer it to the display I want to write to)

[mjs513]

I'm trying to run 2 240x240 screens that don't have the CS pin.
I can get 1 to run fine on the hardware SPI, but since they don't have CS pins, I was trying to use non hardware SPI pins.
When I run the code, it hangs and eventually resets.
It does this during the init call, which calls the commonInit() function.
Using prints, I can trace the code all the way down to waitTransmitComplete()
In there, when it executes the line
_pimxrt_spi->CR = LPSPI_CR_MEN | LPSPI_CR_RRF; // Clear RX FIFO
it hangs.
So I guess the 1st question is can this library do a soft SPI port? (bit-bang)
If so, what am I doing wrong, if not, are there other options to get 2 non-cs displays working?
(another option would to put a mux on the spi clock pin and steer it to the display I want to write to)

One you haven't mentioned what Teensy you are using. A T4.1 has 2 SPI ports you can use on the edge pins.

[jhendrix]

It's a 4.0, so I only have 1 without using the pads on the bottom.

[mjs513]

As far as I know there is no soft spi as you say. Might be able to use flex spi.