It was not an Ethernet chip that was removed; it was the Cortex-M0+ (IMXRT1062), which is used to flash the Cortex-M7 (MIMXRT1062DVJ6B).? My mistake.? I have not used a Teensy for years, but it¡¯s coming back to me ;)
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If one removes the Cortex-M0+ (IMXRT1062), the only thing that ¡°breaks¡± is using the Teensy flash application, which is separate from the Arduino IDE, at least on my development platform.? The Arduino IDE will continue to function normally and produce a file that can be used to flash the Cortex-M7 (MIMXRT1062DVJ6B).
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If one¡¯s skills are up to (successfully) using a JTAG device, one can use the JTAG device to flash the Cortex-M7 (MIMXRT1062DVJ6B) with the file produced by the Arduino IDE.? So, there is no (good) reason to dump the Arduino IDE because some of us want to use JTAG, and anything else, in my humble opinion, would be throwing the baby out with the bathwater.? Further, continuing to use the Arduino IDE will make it easier for folks (new to microcontrollers) to begin to use and experiment with this project.
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What would be really nice:? if someone(s) would write some JTAG (or some other debug) firmware for the onboard Cortex-M0+ (IMXRT1062).? STM and TI, to name two, have this type of functionality on their evaluation boards.? Well, it¡¯s good to have a dream, I guess ;)
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Anyway, that¡¯s my $0.02.? Your mileage may vary.
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Ian
ian007