SAMD21 External clock stuck in initialization

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bayrem.dev
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#1
Posted by bayrem.dev: Wed. Feb 19, 2020 - 10:50 AM
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I'm using a custom board based on samd21j18a mcu, the board embeds an external oscillator and it is working fine when using asf3, whereas it fails to initialize clock when using asf4.

It gets stuck in this while loop in hpl_sysctrl.c file.

 

#if CONF_XOSC_CONFIG == 1
#if CONF_XOSC_ENABLE == 1
    while (!hri_sysctrl_get_PCLKSR_XOSCRDY_bit(hw))
        ;
#endif

 

Here is my clock config in START:

ATMEL START CLOCK CONFIG SCREENSHOT

 

I searched everywhere onilne for the problem but can't seem to find a solution.

Cheers.

This topic has a solution.

wubalubadubdub

Tags:

Tools, Atmel Software Framework (ASF) and Atmel Start (ASFv4) (ARM-related), solved
Last Edited: Thu. Feb 20, 2020 - 01:38 PM
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Lajon
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Posted by Lajon: Wed. Feb 19, 2020 - 03:55 PM
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Not enough of the config is shown above, maybe you have this problem:

https://community.atmel.com/forum/xplained-pro-samd21-external-crystal

/Lars

 

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bayrem.dev
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This reply has been marked as the solution. 
Posted by bayrem.dev: Thu. Feb 20, 2020 - 10:25 AM (Reply to #2)
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Thanks for replying.

I solved the problem by setting the following configs:

in hpl_sysctrl_config.h:

#define CONF_XOSC32K_ONDEMAND 0
#define CONF_XOSC32K_XTALEN 1
#define CONF_XOSC_ONDEMAND 0
#define CONF_XOSC_XTALEN 1

and this only works if I set nvm wait state to 1 (by default 0) in hpl_pm_config.h:

#define CONF_NVM_WAIT_STATE 1

I attached my config folder below if it can help someone in the future.

Attachment(s): 

File config.rar

wubalubadubdub

Last Edited: Thu. Feb 20, 2020 - 10:28 AM
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