[En-Nut-Discussion] STM32: Problems running code with an offset in flash (bootloader)

[Ole Reinhardt]

Hi Uwe,

great, thank you very much. You made my day.

Commenting out the "wfi" call in the idle thread does the trick.

I'll now disable the deepsleep mode bit, so I hopefulle should be able
to use the WFI call again.

best regards,

Ole

Am 04.03.2016 um 18:34 schrieb Uwe Bonnes:
> Hello,
> 
> when the bootloader starts the application, the clock tree is set up
> fine. Using only GPIO toggle and NutMicroDelay, things work as expected. As
> soon as interrupts get involved, HSE is switched off and instead of PLL only
> HSI is used.
> 
> Watching RCC->CR and RCC->CFGR starting with main in the debugger showed no
> unexpected access.  I tracked the WiFiMCU bootloader down to setting the
> sleepdeep bit in the system control register. When entering deep sleep with
> e.g. WFI, HSE is turned off, PLL has no more input and system switches to
> HSI on wakeup/
> 
> Otherwise WiFiMCU uses the same debug port, but a different clock (26 MHz vs
> 8 MHz). With no application loaded to 0x0800c000, I can see the bootloader
> output at 115200 * 8 / 26 Baud with a Saleae Logicanalyser. For the
> application, I can change the config to use 8 MHz.
> 
> Bye
> 

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