About Flyback

Flyback · 2024-12-17

Hi there,I have a custom board with an STM32F070. The VDD and VDDA are connected together. System runs at 48 MHz from a 8 MHz crystal. Each VDD has a 100nF cap. VDD is 3.3V, from a 1% LDO.The code uses UART1, UART2, USB and I2C2. Also, many I/O pins....

Flyback · 2023-10-30

Hi there,I have a custom board (with eMMC) that freezes in the middle of kernel loading:I am under the impression it is related with the rootfs.ext4, becuase it does not try the loading, but I am not sure yet.Flash table is the following (I don´t use...

Flyback · 2023-10-28

Hi ST Community,I am trying to flash a eMMC with STM32CubeProgrammer, in a STM32MP157F custom board. I am using a GPT partition file and a img.I can see the system is creating partitions and flashing, but the structure is wrong for eMMC, so it does n...

Flyback · 2023-10-25

Hi there,I have a custom board based on STM32MP157F, with USB2 connected to STM32CubeProgrammer for flashing the eMMC. No USB-ID, no USB-VBUS connected.The STM32CubeProgrammer downloads the FSBL and U-Boot, but the software does not reconnect as "USB...

Flyback · 2024-12-18

Thanks for your reply.Good questions.The ADC converts “correctly” with the 820R resistor. Not accurately, but it does convert. I obtain a conversion around 1.2 – 1.3V for the 1V input. So it is like the VDDA that the ADC sees is around 2.6V.The other...

Flyback · 2024-12-18

Thanks for replying, but the sampling time is not the issue. I believe there is a fundamental problem.I have increased the sampling time to maximum anyway.The ADC pin is going HIGH during conversion. Below is the waveform at 239.5 cycles, which match...

Flyback · 2024-12-17

I believe I have the same issue.I do calibration after reset, in the end of the ADC_Init.Have you found a solution? Thanks!

Flyback · 2023-11-12

Hi @Erwan SZYMANSKI Thanks for your suggestion, solution was actually there. I took out the first 2 partitions out of the GPT and program them individually in the CubeProgrammer (partitions 4 and 5). Thank you!

Flyback · 2023-10-31

Just in case somebody has the same issue, I was not pointing to the right partition in rootfs in extlinux.conf.

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STM32F070 ADC single channel fluctuation

Kernel stops loading in middle of boot-up

eMMC flashing with GPT partition table

Can't get phy-supply regulator - Failed to get PHY0 for usb-otg@49000000

Re: STM32F070 ADC single channel fluctuation

Re: STM32F070 ADC single channel fluctuation

Re: STM32F070 ADC single channel issue

Re: eMMC flashing with GPT partition table

Re: Kernel stops loading in middle of boot-up