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    This topic was discussed in some depth earlier in...

    This topic was discussed in some depth earlier in this thread. The only practical ways do this is for the board to have no components on the bottom, or require a cutout on the baseboard. Single side...
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    Analog Devices, TI, Maxim, Microchip and others...

    Analog Devices, TI, Maxim, Microchip and others make multi-channel ADCs that can be easily managed over SPI or I2S. These are available in 2-8 channel versions at 1+ msps per converter. A search on...
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    Pico uses the PIO to do I2S. The code could be...

    Pico uses the PIO to do I2S. The code could be identical between python & C but does not have to be.
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    @kdharbert, what voltage range, speed, and...

    @kdharbert, what voltage range, speed, and resolution do you need?
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    Like the RT1062, the Rt1176 has 2 ADCs. They are...

    Like the RT1062, the Rt1176 has 2 ADCs. They are 4.2 Msps @ 12bits. It does also have 5 SAI (Serial Audio: I2S, TDM, etc) channels so you could add external high quality ADC/DAC hardware, like what...
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    it's probably possible, that is, there is...

    it's probably possible, that is, there is sufficient computing power available. But how much Library development are you willing to do, to avoid using the Teensy 4?

    Why not just use a Teensy? The...
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    The Vdrop is intentional. The USB line goes to a...

    The Vdrop is intentional. The USB line goes to a 5 volt to 3.3 volt converter so the voltage drop on the 5v side is irrelevant. They could have just as easily used a p-mosfet as an "ideal diode" but...
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    Have you tried to use custom code with the other...

    Have you tried to use custom code with the other PIO to generate C64 sound? I don't know a lot about the c64 but it sounds like something that you could do without generating a lot of interrupts.
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    It's more than just routing the pins. The...

    It's more than just routing the pins. The bootloader, a mcu in its own right, uses JTAG to communicate with the RT1062 MCU. There are also business considerations. Paul has previously said he is...
  10. This sounds great. I used a software-based...

    This sounds great. I used a software-based debugger for ATMega. A limitation was that interrupts needed to be running all the time in order for the debugger to work. Is it possible to set a...
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    A I2C socket open up a range of cheap, easily...

    A I2C socket open up a range of cheap, easily attached hardware, particularly good for beginners. SparkFun owns "Quiic", while Adafruit owns "STEMMA". The two systems are similar, generally...
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    CMSIS & FreeRTOS are already part of MCUxpresso....

    CMSIS & FreeRTOS are already part of MCUxpresso. MCUxpresso, a SDK rather than an Operating System, was ported to the RT117x MCUs & gcc last year.

    Regardless, I was not suggesting that Paul do...
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    NXP's MCUExpresso SDK already includes a port of...

    NXP's MCUExpresso SDK already includes a port of FreeRTOS as well as much other useful stuff like FATfs, Networking etc. Should not be too difficult to fold it into Teensyduino.
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    I guess as long as there are people with high...

    I guess as long as there are people with high disposable incomes there will be other people trying to separate them from their money. NFTs are good example of this. Why is an "original" digital image...
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    I apologize in advance for off-topic. I've...

    I apologize in advance for off-topic.

    I've been looking for an AV receiver to replace my old one. There's a whole section on Sony's product website where they sing the praises of components that...
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    I read the article, very interesting. But...

    I read the article, very interesting. But building a microcontroller that dissipates watts is an entirely different problem then a guitar pedal that dissipates a few milliwatts. Enclosing components...
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    The topic of castellated pins has come up a...

    The topic of castellated pins has come up a couple times before in this thread. One major challenge is the decoupling capacitors on the bottom of the PCB. These would require a cut out if one were...
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    The Arduino Nano RP2040 Connect hardware was...

    The Arduino Nano RP2040 Connect hardware was spotted in the wild in early Feb. From Tom's Hardware:
    https://www.tomshardware.com/news/first-pi-silicon-arduino-nano-rp2040-connect-spotted
    I would...
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    A RGB LED driven with a single I/O pin ie WS2811,...

    A RGB LED driven with a single I/O pin ie WS2811, WS2812, SK6812, 5050, etc. would be ideal.
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    The RT106x natively supports quad SPI, and the...

    The RT106x natively supports quad SPI, and the 117x supports both quad and octal SPI. These simultaneously clock multiple data lines. The optional external memory (PSRAM / FLASH) on the Teensy 4.1 is...
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    Message received! Thanks for all you do for the...

    Message received! Thanks for all you do for the community.
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    @Frank B, thanks for the tip about the UF2...

    @Frank B, thanks for the tip about the UF2 bootloader.

    I re-read Paul's response about no breakpoints. If you read the OP's question it sounds like he was asking for USB based breakpoint...
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    Arduino as an IDE is, I agree, terrible. But...

    Arduino as an IDE is, I agree, terrible. But Arduino as a framework can be very useful to throw together simple projects. And there's nothing in it that prevents you from twiddling registers if you...
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    Most, if not all of this, is available already....

    Most, if not all of this, is available already. NXP supports its iMX.RT chips with the MCUExpresso package which includes a SDK that is based on the Arm CMSIS. They also offer FreeRTOS, iwIP, FATfs,...
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    While PlatformIO usually generates its makefiles...

    While PlatformIO usually generates its makefiles automatically, custom builds with Arduino or other code on PlatformIO can be managed with script files...
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    Yes, JTAG pins are regular I/O pins as with most...

    Yes, JTAG pins are regular I/O pins as with most modern MCUs. Unfortunately those pin have not been brought out from under the BGA on any of the previous 3.x / 4.x boards. The location of the pins...
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    A 1GHz CPU & GPU without JTAG is severely limited...

    A 1GHz CPU & GPU without JTAG is severely limited in its application. There are some things that simply can't be debugged without it.

    One opinion previously posted on this forum is that JTAG was...
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    You can get information about Teensy mbed support...

    You can get information about Teensy mbed support at https://os.mbed.com/platforms/Teensy-3-1/
    As far as I know they currently only support the Teensy 3.X. Mbed also supports a wide range of other...
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    And that is what they did :) See the C/C++ SDK...

    And that is what they did :) See the C/C++ SDK link here: https://www.raspberrypi.org/documentation/rp2040/getting-started/
    The Pi Foundation provides a C/C++ compiler, as well as a SDK that...
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    Wherever this finally leads it would be great if...

    Wherever this finally leads it would be great if all of the pins on one of the new boards are on identical centers. It is at present very difficult to mount the Teensy 4.1 with pluggable M-F headers...
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    Boards that support flashing via Ethernet have...

    Boards that support flashing via Ethernet have that support built into the bootloader by necessity, because anything else can be overwritten during the flashing procedure. I don't know for a fact...
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    I read the paper... it looks like an interesting...

    I read the paper... it looks like an interesting and challenging project. And I agree with you, power is exceedingly important. But as much as I love my Teensy-s, they are not an optimal solution for...
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    Question I have is, what is the OP trying to...

    Question I have is, what is the OP trying to achieve? Not cost, certainly, as you can pick up a pi zero with 512k ram for $5 on Adaruit. If you're designing your own board, you can get an A8 CPU with...
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    Paul, Thanks your thoughtful reply. It is indeed...

    Paul,
    Thanks your thoughtful reply. It is indeed difficult when so many customers have different “must have” features. When I was writing about the connectors I had not considered the need for blind...
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    As always, it depends on your definition of...

    As always, it depends on your definition of 'expensive'. Arduino just released a $46 breakout board for the Portenta here : https://store.arduino.cc/usa/portenta-breakout
    In addition to two 80 pin...
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    I mentioned this previously and agree it would be...

    I mentioned this previously and agree it would be an optimal solution for users who have requested high-density IO buses to be brought out. It's the same solution reached by Arduino Portenta,...
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    For anyone who's interested, Adafruit now has...

    For anyone who's interested, Adafruit now has their Feather Rp2040 board available. They were in stock as of a few hours ago and I just ordered a couple. Like the other Feather boards it has a reset...
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    I much prefer standard 2.54mm/0.1" mounting....

    I much prefer standard 2.54mm/0.1" mounting. 0.050" headers, especially female headers, are more difficult to come by and more expensive. And the only way you can mount them is with a printed circuit...
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    I agree. IMO the Teensy 3.x and 4.x boards were...

    I agree. IMO the Teensy 3.x and 4.x boards were successful because they were very small and orders of magnitude faster than an Atmega Arduino. The recent release of the Pi pico and its “M0+ on...
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    I agree. In all fairness to Adafruit, their...

    I agree. In all fairness to Adafruit, their libraries are not in any way intended for production applications. They have always been clear their libraries are for rapid deployment of Adafruit...
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    Freescale app note AN4507 discusses the various...

    Freescale app note AN4507 discusses the various options for securing Kinetis flash. Teensy uses an external chip for the bootloader, it might be possible to lock that IP from JTAG access while...
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    I agree. The teensy without JTAG makes...

    I agree. The teensy without JTAG makes development of software with any level of complexity far more difficult than it needs to be due to lack of debug capability. JTAG requires only a few pads for...
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    @joepasquariello, Platformio allows you to...

    @joepasquariello, Platformio allows you to configure the version of the framework that you’re installing. Here is the doc page that shows how to use the release, or latest build, versions of...
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    @kingforger is right. I set up Teensy on VS Code...

    @kingforger is right. I set up Teensy on VS Code and never looked back. It was easy to do and it is so much easier to use than Arduino, even for simple programs.
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    @PaulStoffregen, I was interested in the...

    @PaulStoffregen, I was interested in the multi-core / RTOS features in the MiMXRT117x SDK as it might apply to the new Teensy. I reviewed the 1170 data sheet and reference manual but they had...
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    I haven't read the RT 1170 specs yet but hoping...

    I haven't read the RT 1170 specs yet but hoping there is shared ram and an API to expose it. The Pico has only mailbox FIFOs and mutex locks. These are both blocking & interrupt driven in the C API....
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    No, I posted everything that was sent to the...

    No, I posted everything that was sent to the terminal. I attached to the Pico with CoolTerm on a Mac (115200, 8 N 1).
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    Sure. Here is the output: 2K performance...

    Sure. Here is the output:



    2K performance run parameters for coremark.
    CoreMark Size : 666
    Total ticks : 12129313
    Total time (secs): 12.129313
    Iterations/Sec : 247.334701...
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    The RP2040 also has no RTOS. Just a FIFO mailbox...

    The RP2040 also has no RTOS. Just a FIFO mailbox structure, a mutex lock, and a means to kick off code in the second core using a single program file running on the first.Obviously not ideal but it...
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    I can't imagine anyone putting this effort in on...

    I can't imagine anyone putting this effort in on a MCU without a MMU. The lowest end Cortex with MMU is the A8. This is by design. By definition the Cortex M series processors do not include an MMU,...
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