MicroPython
nrf51 chip not booting when bluetooth stack added #15204
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Double check the 32KHz crystal build settings, I ran into that in the past a fair bit on why the SD can cause lockups at boot. |
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Thanks Andrew any pointers where I can find the crystal build settings? |
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Try browsing the other boards files for a line like this I think (it's been years since I used a softdevice though so I'm not certain): https://github.com/micropython/micropython/blob/master/ports%2Fnrf%2Fboards%2FWT51822_S4AT%2Fmpconfigboard.mk#L7 The correct setting will depend on what clock sources your hardware has. |
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Thanks again I will dig into that! |
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I have some bluetooth modules I got from aliexpress that have a NRF51822 chip inside.
Because they have different pins exposed to existing boards I have a custom board definition that defines the repl.
When I build the firmware with the following command, everything works as expected, I can access the repl through pins 12/13
However when I download the BT stack and compile with
It get nothing on the serial pins.
Not sure if adding the SD param is interfering with my custom repl pins or it's just not booting for some other reason.
Any ideas? I'm using an STLINK and openocd to "halt" "program" "reset" if that makes a difference!
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