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    I'll also have 3 spares of Paul's T4 BoB design...

    I'll also have 3 spares of Paul's T4 BoB design in a week or two - I ordered a run last week from China.
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    I've created an Eagle library with all the bottom...

    I've created an Eagle library with all the bottom pads in place.

    It's based on mng-25's.

    https://github.com/palmerr23/t4-eagle-full
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    bi-directional causes problems if you need...

    bi-directional causes problems if you need synchronised audio. even though the two clocks are crystal locked, they will drift over time. the usual solution is to use a master clock, usually generated...
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    here's another tip from the NXP community forum ....

    here's another tip from the NXP community forum . it's about an external SAI clocks on an iMXRT7D board, but might give you a lead.

    https://community.nxp.com/thread/480390
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    Mike My bad - I used MCLK when I meant master...

    Mike

    My bad - I used MCLK when I meant master clock - which confused everything!

    There are a few hints in https://www.nxp.com/docs/en/application-note/AN12090.pdf but not enough to complete the...
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    Mike Sorry I can't help with the clock timing,...

    Mike

    Sorry I can't help with the clock timing, but solving this problem will help with some other unresolved issues in the audio library/design tool - i.e. clock syncing with i2sslave. Have you...
  7. Replying to dslocum's post - that I can't see in...

    Replying to dslocum's post - that I can't see in this chain.

    The pin assignments are in the Adafruit_ILI9486_STM32.h file

    //Control pins |RS |CS |RST|
    #define TFT_CNTRL GPIOA
    #define...
  8. They're all in the Adafruit_GFX library.

    They're all in the Adafruit_GFX library.
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    Paul, Seems to work OK. No need for "verbose"...

    Paul,

    Seems to work OK. No need for "verbose" to be on any more.

    Richard
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    I've found that my 3.2 programs fine from the...

    I've found that my 3.2 programs fine from the Arduino IDE in Verbose mode under the new Win 10.

    Otherwise it needs to have a"button push".

    Considering the number of status requests generated...
  11. I'm not sure if you have solved your problem yet...

    I'm not sure if you have solved your problem yet with the 3.5" RPi screen.

    I have one and have it working.

    The chip is an ILI9486
    The interface is 16 bit serial - it resembles notro's circuit...
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    Egg on face. I had jumpers that were still...

    Egg on face.

    I had jumpers that were still tied together in an IDC cable - parasitics were causing the issue.

    Mischief managed.
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    To check my work, I ran the same code and...

    To check my work, I ran the same code and connections up on a T3.2.

    It worked fine (including with the I2S and patchcord code enabled) on the T3.2 but not on the T3.6

    Subtle differences?
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    Audio WM8731 T3.6: I2S breaks I2C?

    Hi,

    I'm setting up an open music labs audio board (WM8731) with a T3.6

    Assuming the audio library uses I2S (WM8731 as slave) & I2C0 I have connected to the default pins for both.

    I2S: SCK...
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    I'm sorry, but the details of the board you want...

    I'm sorry, but the details of the board you want to use with a Teensy didn't come through with your post.

    I can't see an earlier post in this stream where you have given this information.
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    Having had a look at the price of mikroBus boards...

    Having had a look at the price of mikroBus boards online (only MikroElectronika seem to make them, despite it being an open standard), I'm thinking I might spread the risk and bring it back to one...
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    Yep. I'll add a power LED. Still thinking...

    Yep.

    I'll add a power LED.

    Still thinking about the board service - perhaps PCBcart - $88AU for 10 boards. Probably 20-30% cheaper than OSHPark, but you have to wait for them to come from...
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    Thanks for the suggestions. Absolutely:...

    Thanks for the suggestions.

    Absolutely: different Serial#s for each mikrobus connector.

    I'll probably use SPI0 and SPI1 as SPI2 is accessible only via the pads on the back. I could use the...
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    Flexiboard another approach

    Hi all,

    Having looked at Frank's Flexiboard design, it spurred me to moving forward on an idea for a general purpose motherboard for the new 3.5 / 3.6 Teensies.

    Most of my projects are one...
  20. TNI. Thanks again. Richard

    TNI.

    Thanks again.

    Richard
  21. Thanks tni, I was just removing all the...

    Thanks tni,

    I was just removing all the possible places I could have introduced errors - bad parameters for that constructor was one of them.

    I will confidently go back to the...
  22. Thanks Kurt, The 30MHz / MODE1 settings were...

    Thanks Kurt,

    The 30MHz / MODE1 settings were left over from trying Paul S' optimised ILI9341 library.

    Unfortunately neither converting to 8MHz / MODE0 in either the constructor mode ...
  23. Richard Thanks for the tip. I unplugged...

    Richard

    Thanks for the tip.

    I unplugged the new SPI device entirely and it made no difference - the code works fine until I try to send data to the new device in gcSetVal().

    The logic...
  24. SPI issues with ILI9341 T3 library and second device

    Hi,

    I'm building something with two SPI devices on a Teensy 3.1 - an ILI9341 SPI display, which works fine on its own with either Paul S' T3 library or the standard Adafruit one.

    As soon as I...
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