About tjaekel

tjaekel · 2024-08-13

Dear STM team,do you consider to add "Programmable IO" (PIO, as in RP2350) or FlexIO (as in NXP MCUs) to your chips?It would be really cool: often I need interfaces on MCU which are not available as a peripheral devices, such as: MDIO (Master), JTAG ...

tjaekel · 2024-06-21

My project makes progress, see here:https://youtu.be/ah19fWodqg8 https://youtu.be/svEeEQ9jmDc My question:When I set LPn low - is just the I2C disabled? Or would also an initiated ranging stop?In order to save power: is there a need to set via I2C th...

tjaekel · 2024-06-19

My three ToF sensors on a finger ring are working (using a Portenta C33).https://youtu.be/qL_alTQpko0Next steps: train and realize gestures (and maybe visualize in Unity). So far, my sensors mounted on a finger ring (for RingGesture) is working (just...

tjaekel · 2024-05-16

I have compared my platforms using PDM microphones related to PDM to PCM and filtering:Platform 1:STM32H747 (Portenta H7), with SW PDM2PCM filter (and optional to add post-processing)Platform 2:STM32U5A5 with ADF filter (in MCU) or external PCMD3180 ...

tjaekel · 2024-05-15

This is more an experience report.I want to get audio from an INput source and forward to an OUTput sink. And both should stay in sync "forever" (I do not want to have a clock drift, I do not want to have the condition to skip a sample or to add one,...

tjaekel · 2024-09-04

As I understand: SPWMI is just a master on STM32 MCU.It does not have a slave receiver (or mode).So, it cannot communicate with itself.You might be able to test it with these single wire LED strips.

tjaekel · 2024-09-04

Isn't UNICODE just sending two bytes for one character?Why should it be related to the USB channel for communication?Even, there would be a descriptor in USB Enumeration, telling the host, now all is sent as UNICODE - how do you know the FW (the USB ...

tjaekel · 2024-09-04

Almost all looks reasonable, except:What do you mean by:APPVTAB->Reset_Handler();Do you jump to the address (for execution starting there) where the ResetHandler ADDRESS (!!) stored, or do you read the 32bit as an ADDRESS from this location and then ...

tjaekel · 2024-09-04

TrustZone is not related to power or clocks (not directly directly).It just means: only code running on TrustZone domain (e.g. inside a TrustZone enabled memory) can write to TrustZone enabled registers or features.It separates your code in a "TrustZ...

tjaekel · 2024-09-04

For my five cents: you mix up "dithering" with "slew rate":Dithering, as I know (from audio) is: randomize the lowest bits (with a real random noise).If you would do on a PWM audio signal: it looks like just the PWM signal is a bit more jittering.But...

User statistics

User Activity

STM32 with FlexIO or PIO?

RingGesture: ToF VL53L5CX for finger and hand gestures

ToF VL53L5CX - RingGesture is working

PDM microphone and filter options

STM MCUs: how to sync Audio IN and OUT?

Re: The puzzled about SWPMI of STM32H7

Re: USB HID Device: how to send Unicode?

Re: Help to Make Jump from Bootloader to Application Work

Re: what does TZEN really do ?

Re: PWM dithering for noise mitigation