About Andrew Sterian

Andrew Sterian · 2025-02-18

(STM32H747I-DISCO board)It seems to be a common problem -- USB HS works fine as long as this line reads:hpcd_USB_OTG_HS.Init.dma_enable = DISABLE;As soon as I change this to ENABLE (either manually or through STM32CubeMX) then USB enumerates but as s...

Andrew Sterian · 2022-07-08

See attached configuration in STM32CubeMX. Generated code is only: sOspiManagerCfg.ClkPort = 1; sOspiManagerCfg.NCSPort = 1; sOspiManagerCfg.IOLowPort = HAL_OSPIM_IOPORT_1_LOW; // NOTE: MISSING ASSIGNMENT TO sOspiManagerCfg.Req2AckTime if ...

Andrew Sterian · 2021-10-17

I'm using an STM32H725 and am trying to read a block of SPI data (say, 100 samples) from an external SPI ADC on a fixed sampling schedule. That is, I do NOT want to read all 100 samples as fast as possible; I want to read 1 sample every microsecond.I...

Andrew Sterian · 2021-10-10

The documentation for the DAC says "A DMA request can be generated when an external trigger (but not a software trigger) occurs if DMA requests are enabled"But I want to configure the DAC to have no trigger, and instead use TIM12_TRGO to drive the DA...

Andrew Sterian · 2021-07-22

I'm trying to understand the benefits/tradeoffs of the "Direct SMPS supply" and "SMPS supplies LDO" options for the STM327H (red and blue options in the attached figure). Since the LDO adds an extra source of power loss, and the SMPS can supply all d...

Andrew Sterian · 2025-02-19

The DBGMCU_IDC register has the REV_ID[15:0] field as 0x2003 which tells me this is a Revision V chip.

Andrew Sterian · 2022-08-01

Hello Semer,Thank you for your reply. Your code will build without any errors, and no errors will be reported at runtime unless you compile with the "Enable Full Assert" option checked in STM32CubeMX (Project Manager-->Code Generator-->HAL Settings--...

Andrew Sterian · 2022-01-07

Here is a reply I received from another ST FAE:"Due to the switching nature of SMPS, they can be noisier than LDO's. Using an LDO after the SMPS can isolate the loads from both switcher noise and EMI noise while providing highly accurate voltage. The...

Andrew Sterian · 2021-10-10

It is the STM32H725, but DAC conversion can also be triggered by simply writing to the DAC_DHRx if the TENx bit is 0 (i.e., no trigger).So my question is, in this case (TENx=0), can the pace of the DAC writes be driven by DMAMUX synchronization?

Andrew Sterian · 2021-07-23

Thank you Bouraoui, but you are referencing a different part. RM0399 applies to the STM32H74x series and I am using the STM32H725/735, as described by RM0468 (sorry, should have been more clear).The data sheet says VOS0 requires 1.36V, and Section 6....

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STM32H747 USB with DMA does not work

STM32CubeMX generates incorrect code for the OCTOSPI interface for STM32H725. The generated code does not populate the Req2AckTime field of the OSPIM_CfgTypeDef structure, but HAL_OSPIM_Config() validates this value and throws an assertion error.

How to use SPI Rx-only with DMA and timed trigger or synchronization

Can STM32H7 DAC DMA work without a trigger, and instead use DMAMUX synchronization?

SMPS with/without LDO comparison

Re: STM32H747 USB with DMA does not work

Re: STM32CubeMX generates incorrect code for the OCTOSPI interface for STM32H725. The generated code does not populate the Req2AckTime field of the OSPIM_CfgTypeDef structure, but HAL_OSPIM_Config() validates this value and throws an assertion error.

Re: SMPS with/without LDO comparison

Re: Can STM32H7 DAC DMA work without a trigger, and instead use DMAMUX synchronization?

Re: SMPS with/without LDO comparison