Espruino JavaScript
Flash MicroPython on watch #2691
Replies: 7 comments
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Posted at 2021-06-18 by @gfwilliams
It could be:
Honestly, for something like this I think you'll need to break the watch open and attach to the SWD pins behind the LCD. Once you've done that you could then actually debug the code properly, and if MicroPython is hanging or causing a hardfault you'll be able to see exactly where. It's a bit of a pain initially, but it'll save you weeks of work when done :) |
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Posted at 2021-06-18 by alej0 Is it mandatory to use a Nordic nRF52832 DK to connect? |
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Posted at 2021-06-18 by @fanoush micropython does not support 3.0 version of softdevice that matches SDK12 that espruino uses. nRF52832 DK is not needed, any SWD debugger device would work including raspberry pi or pico or $2 blue pill board or stlink usb dongle from aliexpress. And BTW there is already micropython based firmware for nrf52832 watches called waspos https://github.com/daniel-thompson/wasp-os that might be good starting point. |
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Posted at 2021-06-18 by alej0 Thanks! I'll try with wasp-os |
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Posted at 2021-06-20 by alej0 I've opened the watch but I'm not sure how to connect the SWD pins. I see 4 golden circles in the back of the board but I haven't found which one is GND, SWDIO and SWCLK. Could you help me with this? |
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Posted at 2021-06-21 by @gfwilliams Here you go... I'll also update https://www.espruino.com/Bangle.js+Technical with this: You only need GND, SWDIO, SWDCLK. VDD is not required for programmingAttachments: |
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Posted at 2021-07-13 by HughB Wondering what MicroPython has over Javascript for Bangle JS ? |
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Posted at 2021-06-18 by alej0
Hello,
I'm trying to get MicroPython(there is a port for nRF52832) in my banglejs but I can't make it work.
After flashing through DFU a signed package the watch reboot and shows:
WATCHDOG
DFU ZYOS
BOOTING . . .
then it reboots and shows
LOCKUP
DFU ZYOS
BOOTING . . .
and reboot again and again showing lookup message.
After that I'm able to enter DFU mode and flash Espruino again and the watch boots normally, all apps are still there, like nothing happened.
Could someone help me debug this?
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