The pinetime is preloaded with firmware.
This firmware is secured, you cannot peek into it.
NOTE: The pinetime has a swd interface. To be able to write firmware, you need special hardware. I use a stm-link which is very cheap(2$). You can also use the GPIO header of a raspberry pi. (my repo: https://github.com/najnesnaj/openocd is adapted for the orange pi)
To flash the software I use openocd : example for stm-link usb-stick
# openocd -s /usr/local/share/openocd/scripts -f interface/stlink.cfg -f target/nrf52.cfg
example for the orange-pi GPIO header (or raspberry)
openocd -f /usr/local/share/openocd/scripts/interface/sysfsgpio-raspberrypi.cfg
-c ‘transport select swd’ -f /usr/local/share/openocd/scripts/target/nrf52.cfg -c ‘bindto 0.0.0.0’
once you started the openocd background server, you can connect to it using:
#telnet 127.0.0.1 4444
programming
once your telnet sessions started:
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
Open On-Chip Debugger
> program zephyr.bin
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x00001534 msp: 0x20004a10
** Programming Started **
auto erase enabled
using fast async flash loader. This is currently supported
only with ST-Link and CMSIS-DAP. If you have issues, add
"set WORKAREASIZE 0" before sourcing nrf51.cfg/nrf52.cfg to disable it
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x2000001e msp: 0x20004a10
wrote 24576 bytes from file zephyr.bin in 1.703540s (14.088 KiB/s)
** Programming Finished **
And finally execute a reset :
>reset
removing write protection see: howto flash your zephyr image