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gregtomasch / USFSMAX_MMC_Module

Test sketches and information to use the improved USFSMAX Module with MMC5983 magnetometer
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Request support for Teensy 4.1 #4

Closed KeyLaager closed 11 months ago

KeyLaager commented 12 months ago

error "Sorry, i2c_t3 only works on Teensy LC and 3.x. Use Wire for Teensy 4.0, 4.1, MicroMod." when trying to compile for Teensy 4.1

gregtomasch commented 12 months ago

Yes, the error message is true on its face. I have a version of the test sketch for Teensy 4.x that uses the standard "Wire" library included in the Teensyduino core. However, this version of the "Wire" library only works with the USFSMAX if the bit clock is set at 100kHz. At the default value of 400kHz, the I2C bus hangs in a few seconds... Apparently there have been some issues with the "Stock" version of the Teensy "Wire" library for a long time; I think that's why a third party wrote the "i2c_t3" library for Teensy 3.x in the first place.

I should note that Teensy 4.x is the only MCU to date known to have this problem... So I conclude that it is an issue with the Teensy 4'x "Wire" library. I have been reluctant to post this version of the test sketch for this reason...

If you want to try it anyway, email me at "poirot@earthlink.net" and I will send you a ZIP archive.

KeyLaager commented 12 months ago

Greg, thank you so much for your response. I sent you an email from @.*** If you don’t mind, I would like to take a look at the zip.

Very Respectfully,

Joshua

On Sat, Sep 23, 2023 at 20:43 Greg Tomasch @.***> wrote:

Yes, the error message is true on its face. I have a version of the test sketch for Teensy 4.x that uses the standard "Wire" library included in the Teensyduino core. However, this version of the "Wire" library only works with the USFSMAX if the bit clock is set at 100kHz. At the default value of 400kHz, the I2C bus hangs in a few seconds... Apparently there have been some issues with the "Stock" version of the Teensy "Wire" library for a long time; I think that's why a third party wrote the "i2c_t3" library for Teensy 3.x in the first place.

I should note that Teensy 4.x is the only MCU to date known to have this problem... So I conclude that it is an issue with the Teensy 4'x "Wire" library. I have been reluctant to post this version of the test sketch for this reason...

If you want to try it anyway, email me at @.***" and I will send you a ZIP archive.

— Reply to this email directly, view it on GitHub https://github.com/gregtomasch/USFSMAX_MMC_Module/issues/4#issuecomment-1732461535, or unsubscribe https://github.com/notifications/unsubscribe-auth/AZNVOZ4MUJNH4MSL45UHAJDX36M3LANCNFSM6AAAAAA5DW7XCM . You are receiving this because you authored the thread.Message ID: @.***>