About MKenn.1

MKenn.1 · 2021-11-29

I'm having a problem with STM32CubeProgrammer and a 1MB STM32F767ZG configured in dual bank mode. On the left, I tried to flash a 520k bin to the device, over the top of previous firmware.Expected behavior: erase sectors 0-7, 12, then write 520K byte...

MKenn.1 · 2021-07-02

I'm having trouble entering the DFU bootloader on my H743 (rev V).power on (with BOOT0 high) -> USB DFU functions as expectedpower on (with BOOT0 low) -> application functions as expectedreset (with BOOT0 low) -> application functions as expectedrese...

MKenn.1 · 2021-04-15

STM32F427VGT6. Should be 1MB flash, right?Then what's up with this?Mass erase: works, erases sectors 0-11Write: works, can write to full 1MBSingle sector erase: doesn't work, either stlink or from firmware running on the device (see attached screensh...

MKenn.1 · 2021-11-29

It also incorrectly identifies my MCU: This is in reality an STM32F767ZGT, but it identifies it as 2MB.

MKenn.1 · 2021-07-20

The plot thickens again. Something is clearly leaking across a reset, because I now have a solution to the problem that's pretty weird. Setting the relevant bits in AHB1RSTR doesn't help, still doesn't work. However, before the reset, clearing the US...

MKenn.1 · 2021-07-19

This test was done on an H743ZI2 Nucleo with the st-link USB connected, let the reset-to-DFU happen, then connect the other USB connector after the reset. PC never sees the device until the system ROM is running.

MKenn.1 · 2021-07-19

The plot thickens! I disabled USB in our application, so now it can't talk to the PC, but it's still fully alive. Created a thread that just waits a few seconds, then reboots to DFU (one of the things that didn't work before). Reset-to-DFU now wor...

MKenn.1 · 2021-07-15

Some fun facts:The H7 bootloader is implemented using ST HAL (functions and structs match exactly), but the older F4/F7 bootloaders are not.This H7 bootloader was probably compiled with optimization either disabled, or maybe at -Og, which seems like ...

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STM32CubeProgrammer incorrectly erases on dual bank 1MB STM32F7

STM32H743 DFU Entry doesn't work unless BOOT0 held high at power-on

Why does my STM32F427VG not allow erasing the top half of flash?

Re: STM32CubeProgrammer incorrectly erases on dual bank 1MB STM32F7

Re: STM32H743 DFU Entry doesn't work unless BOOT0 held high at power-on

Re: STM32H743 DFU Entry doesn't work unless BOOT0 held high at power-on

Re: STM32H743 DFU Entry doesn't work unless BOOT0 held high at power-on

Re: STM32H743 DFU Entry doesn't work unless BOOT0 held high at power-on