About jefflongo

jefflongo · 2021-08-19

Hello,I am working with the SDMMC peripheral on a STM32L4S9 chip to interface with an SD card on a custom board using the HAL SD card driver. I am performing reads and writes using `HAL_SD_WriteBlocks` and `HAL_SD_ReadBlocks`. Everything is working w...

jefflongo · 2021-04-28

Hello,I am using STM32L4S9 and the datasheet mentions the LSI is 32khz. Is this 32000hz or 32768hz? Best,Jeff

jefflongo · 2020-07-14

Hello,I have developed an application which can dynamically detect source capabilities by reading the capabilities soon after a PD charger is plugged in. In order to renegotiate with the new PDO, I currently must issue a reset by writing to the RESET...

jefflongo · 2020-04-26

I am interested in the UCPD peripheral built in to the STM32G431. However, I noticed that the software support for the peripheral requires FreeRTOS. Does anyone know of any support (or planned support) for the UCPD peripheral that does not require an...

jefflongo · 2020-01-15

When using the command line version of STM32CubeProgrammer, I notice during the verification process (-v flag), the progress bar follows a sequence like 6%->12%->18%->24%-18%->24%... and ends at 24%, with a successful verification. Picture provided f...

jefflongo · 2021-11-29

yes

jefflongo · 2021-11-26

Hi,Not sure if this works in STM32CubeProgrammer yet, but I was able to come up with a workaround, see here: https://github.com/jefflongo/stm32handsfree

jefflongo · 2021-04-28

Seems like nominally, the frequency is 32000Hz. I think this is solved then.

jefflongo · 2020-07-22

I don't think it had anything to do with the second soft reset, as I said in the previous message, the delay was required between the initial soft reset and the PDO write. However, I do see your point and I replaced the delay with a loop to wait for ...

jefflongo · 2020-07-22

I hooked up a scope to the CC pins, and was in fact seeing activity when sending the soft reset message. I noticed that the soft-reset message did in fact work, but only while debugging. To reiterate, my method of performing negotiation is:soft reset...

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User Activity

STM32L4S9 SDMMC timeout handling

STM32L4 LSI: 32000Hz or 32768Hz?

PD Soft Reset doesn't work

STM32G4 UCPD without RTOS?

Verification progress bar bugged?

Re: BOOT0/NRST control with DTR/RTS

Re: BOOT0/NRST control with DTR/RTS

Re: STM32L4 LSI: 32000Hz or 32768Hz?

Re: PD Soft Reset doesn't work

Re: PD Soft Reset doesn't work