Restart Microprocessor

simonbanks9 · ‎2009-06-09

Posted on June 10, 2009 at 08:57

simonbanks9 · ‎2011-05-17

Posted on May 17, 2011 at 15:03

Hi.

I am using the STVP programming toolkit API with the Raisonance Rlink and the SWIM interface (an STM8/128 Eval board).

Is there a reliable way to set the controller to run after programming, without disconnecting the SWIM connection or power cycling the unit?

Thanks.

mozra27 · ‎2011-05-17

Posted on May 17, 2011 at 15:03

Hi Simon,

Yes, you can do this by apply an external reset through the NRST pin.

In this way you don't have access to use the SWIM pin as I/O without disconnecting the SWIM connection.

Once SWIM was activated/connected, writing to SWD in the register CFG_GCR doesn't disable the SWIM anymore. The only ways to disable the SWIM once active are:

- POR (supply disconnect)

- SRST (system reset) command send from Host to Target then check the flag SWIMF in the register RST_SR. (refer to ''UM0470: STM8 SWIM communication protocol and debug module'' for more details about this feature)

Regards

mozra

bassinux · ‎2011-05-17

Posted on May 17, 2011 at 15:03

just to keep it simple,

Apply a low level voltage in NRST pin then High level voltage your micro will reset, and enjoy it

sramsauer9 · ‎2011-05-17

Posted on May 17, 2011 at 15:03

See solution at

https://my.st.com/public/STe2ecommunities/mcu/Lists/STM8/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/STM8/How to reset MCU through SWIM and command line

Regards,

Stefan