About VBarb.1

VBarb.1 · 2020-06-30

This specifically relates to the same stm32l496 and the USB functionality, specifically creating mass storage mode. I used STMCubeMx to generate the configuration originally, and have since checked that against sample project provided by STM on githu...

VBarb.1 · 2020-05-13

So for this question, I'm using stm32l4 device. It is a Cortex M4. I've been developing with stmcubemx and Kiel compiler.I have a program that can jump to the stm32 provided dfu mode. That works great. I can update the code using DfuSe Demo.I've run ...

VBarb.1 · 2020-05-13

If this only happens when you jump to DFU through your system program, you need to ensure the state of the device is correct, peripherals interrupts disabled, clock settings compatible, etc.--> jumping to dfu state seems to be correct as I mentioned ...

VBarb.1 · 2020-05-13

So any idea why it would be stuck at .text 0x0800029c Section 64 startup_stm32l496xx.o(.text)or in the system bootloader?

VBarb.1 · 2020-05-13

Thanks for responding. I definitely am close to reset state when I jump to DFU. I write a magic number, turn off all peripherals, reboot and on boot that is the first value I read and then decide to jump to dfu mode or not. This code has been tested ...

VBarb.1 · 2020-05-13

Clive1 is correct. you aren't incrementing anything. Use ABB as a global flag: void EXTI1_IRQHandler(void){static int count = 0;if ((GPIO_ReadInputData(GPIOA) & GPIO_Pin_1)) //Use to verify it is the button pin. Change to whatever make sense for you....

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Vbus is driven in mass storage mode.

stm32l4 not leaving dfu mode and starting program.

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Re: stm32l4 not leaving dfu mode and starting program.

Re: stm32l4 not leaving dfu mode and starting program.

Re: MAY i use Interrupt handler multiple times ?