small atmel SAM S70 (300MHz cortex-M7) based dev board.
similar to the arduino due, except super-mega-turbocharged.
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it is not quite right, but enough is working to boot OS/J5
bossac successfully hacked.
blinky.c successfully loaded.
LED is blinking!
board appears to work.
the SAM-BA boot rom runs, the usb port is recognized,
I can manually connect and enter cryptic SAM-BA commands.
chip is not supported by bossac though, so cannot program it, yet.
% emacs bossac.cpp
board is not finished yet, and there is still a little space on the board.
the SAM E70 has a compatible pinout and has ethernet.
is wired ethernet interesting?
I was looking for a small fast ARM board, with a high-speed (480MHz) USB.
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Are there any tricks to USB on the S70? My project (https://hackaday.io/project/20772-orthrus) has an S70N19 and SAM-BA works properly, but I'm building firmware with Atmel Start and USB just doesn't seem to work at all. I'm paranoid that I made some kind of bonehead mistake in either the schematic or layout and that SAM-BA working is just a coincidence something.
Are you sure? yes | no
Has the S70 a Bootlader Preinstalled?
Is it the same form factor as the Raspberry Pi Zero ? and are the header pins (somewhat) compatible with Raspberry Pi Hats ?
it is roughly, but not exactly, the same size as a pi zero. the header is not compatible.
but the header does have the same number of pins, so you could use the same breadboard adapters, and suchlikes.
I think if you would keep the same pinout as the Raspi for power, GND, I2C, SPI and UART, a lot of Raspi Hat would be compatible. Would that be too much of a burden with the PCB routing ?
Here is one that would be nice to be compatible with : https://hackaday.io/project/9461-lifepo4weredpi
I suspect it would require getting rid of a lot of the interesting functions (ADC, DAC, and PWM pins). but something to think about...
USB2 is 480Mbps, not 480MHz. The terms are not interchangable.480Mbps is at most 240MHz if the data bit toggles every cycle.
thanks for noticing that. fixed.
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