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AN3307 Fiches technique(PDF) 20 Page - STMicroelectronics

No de pièce AN3307
Description  Guidelines for obtaining IEC 60335 Class B certification for any STM32 application
PDF  37 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3307 Fiches technique(HTML) 20 Page - STMicroelectronics

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Class B software package
AN3307
20/37
Doc ID 18186 Rev 4
Figure 4.
STM32 demo hyper terminal output window in verbose mode
4.3.3
Debugging the package
If any of the self-test routines fail, an MCU reset is triggered in the FailSafePOR function
defined at stm32xxx_STLstartup.c file. This makes the debugging of the application difficult,
and can cause the debugger to lose the execution context.
While debugging the package it is useful to disable:
●
The call to the NVIC_GenerateSystemReset() macro in the FailSafePOR() routine to
prevent losing execution context when resetting the micro
●
Control flow monitoring when adding or removing self-test routines, in particular run-
time self-diagnostics
●
All program memory CRC checksum tests when using software breaks in the code to
prevent program memory check sum error occurrence
●
Window watch dog to prevent improper service out of the time slot window dedicated
for its refresh.
In the debugging phase it may be useful to enable the verbose diagnostic mode to watch
Class B status text messages via the USART terminal.



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