About Meixner

Meixner · 2024-11-29

I am trying to enter stop mode 2 and have it woken up by LPTIM1. Now my problem is that stop mode is not entered reliably (or it wakes up too early which I cannot differentiate). The probability stop mode is entered seems to depend on LPTIM1 configur...

Meixner · 2024-08-08

I have got 3 identical boards with STM32u5a5. For improving ADC accuracy I want to calibrate Vref using Vrefint. This is working fine on one board, but on the other two boards Vrefint reads as 0 using the same software. Other ADC channels seem to wor...

Meixner · 2024-07-16

Hello, I have a problem with unaligned access, which generates a hard fault when the software is started without bootloader.When running the same software from mcuboot bootloader, there is no hard fault on unaligned access.The MPU and TrustZone confi...

Meixner · 2024-01-08

I am trying to use TrustZone on STM32U5A9:I am setting up the following regions in SAU:0xc1fe000-0xc1fffff non-secure callable0x8200000-0x83fffff non-secure0x200c0000-0x20273fff non-secure0x60000000-0x6fffffff non-secureAs soon as I flip the enable f...

Meixner · 2023-10-05

I am trying to access a NOR flash via OctoSPI1. CLK is connected to PF4, NCS is connected to PI5. While I can see clock cycles on PF4, PI5 stays high all the time.Does anyone have an idea, what could be wrong?Trust zone is disabled. The register sett...

Meixner · 2024-11-29

When it does not enter Stop Mode, it returns immediately.When it enters Stop Mode, power consumption is reduced significantly, which I can measure on the power supply.I have already tested waking up via GPIO. That does work and I see the pending IRQ ...

Meixner · 2024-11-29

Example HAL settings of LPTIM1 when entering stop mode 2 fails reliably:{Instance = 0x46004400, Init = {Clock = {Source = 0, Prescaler = 3584}, UltraLowPowerClock = {Polarity = 0, SampleTime = 0}, Trigger = {Source = 65535, ActiveEdge = 0, SampleTime...

Meixner · 2024-11-29

Repeating the call to HAL_PWREx_EnterSTOP2Mode() when all IRQs are 0 does not help.

Meixner · 2024-08-12

Where would I find 1.6.0?https://www.st.com/en/embedded-software/x-cube-freertos.html lists 1.2.0 as latest release.

Meixner · 2024-08-09

ReplacingMODIFY_REG(hadc->Instance->CR, ADC_CR_CALINDEX, 0x9UL << ADC_CR_CALINDEX_Pos); MODIFY_REG(hadc->Instance->CALFACT2, 0x00FF0000UL, 0x00020000UL); SET_BIT(hadc->Instance->CALFACT, ADC_CALFACT_LATCH_COEF);in HAL_ADCEx_Calibration_Start() byMODI...

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User Activity

STM32u5 does not enter stop mode 2 reliably / wakes up too early

Vrefint reads as 0 on some boards

Hard fault on unaligned access on STM32U5

Enabling TrustZone non-secure internal flash and ram reads as zero from secure state

OCTOSPI: NCS stays high on STM32U5A9

Re: STM32u5 does not enter stop mode 2 reliably / wakes up too early

Re: STM32u5 does not enter stop mode 2 reliably / wakes up too early

Re: STM32u5 does not enter stop mode 2 reliably / wakes up too early

Re: Vrefint reads as 0 on some boards

Re: Vrefint reads as 0 on some boards