I planning on making a samd21 board, and would like to ask a few questions
upon buying a new chip will i be able to directly upload code to it via the usb pins? i am using a crystalless samd21 board.
Will the chip be supplied with a bootloader installed ?
That is what i dont know,
Here is alink to where i will buy it from digi-key
A chip from a generic source like that will not have an Arduino bootloader installed
I have recently had to reinstall the bootloader on an Arduino Nano 33 IOT which uses the SAM21 chip and it was easily done using the DAP interface and an ESP32 to do the actual programming
What electronics and programming experience do you have and what equipment and processors are available to you ?
i have a segger jlink mini , at the same time the jtag pins will be exposed so placing a newbootloader is no problem.
doesnt the samd21 have a built in sam-ba bootloaders? im trying to avoid using the arduino bootload since a need sub 500ms boot time.
so i guess im trying to ask is can the arduino IDE upload sketch to the sam-ba bootloader directly?
Sorry, but I have no experience of the sam-ba bootloader in any shape or form
Why the need for such a short boot time ?
I believe it does, ONLY if you get the WLCSP package. See the footnotes of the "Ordering information" section of the datasheet.
I'm pretty sure that means that other packages do NOT come with any bootloader pre-installed.
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