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I've got a custom board built around an STM32MP135AAE3.  It's designed to have an eMMC instead of an SD card, the problem is that the board was not laid out correctly and the JTAG isn't connected.I'm having trouble writing to the eMMC (that's another...

The board was designed incorrectly, they have pins for a JTAG but forgot to actually route them to the MPU.  The eMMC is not going to have a first-stage bootloader on it, and it's looking like it's not possible to flash an SPL to the eMMC over USB al...

The STM32MP135AAE3 board was designed incorrectly, they have pins for a JTAG but forgot to actually route them to the MPU.  The eMMC is not going to have a first-stage bootloader on it, and it's looking like it's not possible to flash an SPL to the e...

It seems Azure® RTOS might be able to run on STM32MP135AAE3, the "Introduction to Azure RTOS with STM32" says "All STM32MP13x lines are covered by default by Azure® RTOS middleware within the matching STM32Cube MPU packages" but I'm having trouble fi...

I've inherited a custom board that contains (among other things) an STM32MP135AAE3, an eMMC, and an Ethernet controller (DP83826ERHBR).  No SD card, no HDMI, no keyboard.  For that matter, no JTAG (board error). I had thought about running Zephyr but...

It looks like switching to using USB instead of UART is more than just pointing to different UART pins?  Don't I have to rewrite __io_putchar() to talk to USB instead of calling HAL_UART_Transmit()? 

Alas no UART, only USB.  PD6 goes to RMII_REFCK and PD8 is not connected at all.Running your command line on an un-modified STM32MP135C-DK_DDR_UTILITIES_A7.stm32 seemed to do something at least: 

Hi Patrick,Yes, I realize "serial boot" applies to either UART or USB.  IT'S NOT WORKINGWhen I follow the instructions in the DDRFW-UTIL tool repo, it makes it very clear from step one that ST-LINK is required (although, confusingly, the diagram imme...

Maybe there's another problem with this board ... it looks like BOOT0 is pulled low and BOOT1 and BOOT2 are pulled high which should mean serial boot mode, but what I'm seeing in STM32CubeProgrammer is this:ChatGPT says I should be seeing STM32CubePr...

A couple of problems with STM32DDRFW-UTIL -1) The documentation says "Set the correct boot pins on your board in either Engineering mode or Boot from SD" and my board is set to serial boot.  I can unsolder & resolder the pads to switch the boot mode ...