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ESP32-S31

espressif.com

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131–140 of 207 posts

Re: ESP32-S31

#131

Post by actionfromafar »

phkahler wrote: post #65
BenjiWiebe wrote: post #57

Earlier quoted context omitted.

Also why do you need 1uS for motor control? 1uS is 0.1 degrees of rotation at 16,666 RPM if I did the math right. I don't know much about motor control, is it normal to need that fast of feedback?

>> Also why do you need 1uS for motor control? It's not that important if you use current sensors on the motor phases. But then you're looking at HALL sensors or a shunt with a very high gain amplifier with good common mode rejection - looking for mV signals on top of a +12V or +48V square wave at PWM frequency. By using low-side shunts under each half-bridge you don't need the common mode rejection, but you can only…

That's wild. Would never have guessed.

Re: ESP32-S31

#132

Post by amelius »

randomint64 wrote: post #3

Espressif is on fire! And the CPU even has SIMD instructions! RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs. Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with…

Yeah but the moment you need IP blocks like for wifi or ethernet or usb, it's back to square one.

Re: ESP32-S31

#133

Post by alexisread »

abdullahkhalids wrote: post #88
kjlldld wrote: post #50

Is anyone else worried that these chips are all made in China?

I am concerned by all chips and software made by giant corporations. None of them are trustable, and any one of them will sell me out for a buck. We must constantly fight to have open source and audited chips and software made in commodity fashion.

You might be interested in the Baochip

https://www.crowdsupply.com/baochip/dabao/updates/our-campai...

Probably the most open chip on the market, and sits between a pi and a pico

Re: ESP32-S31

#134

Post by volemo »

reaperducer wrote: post #104
alnwlsn wrote: post #53

I kind of wish these all weren't called ESP32. ESP8266 and ESP8285 -> ESP32 made sense, but now we have 10+ different versions with different features and different architectures. Kind of like how in every thread involving a Raspberry Pi Pico (RP2030/RP2350), there's always someone confusing it with the single board computer version. The ESP32 (Classic, usually WROOM-32E) is still usually what comes to mind when I he…

I kind of wish these all weren't called ESP32. ESP8266 and ESP8285 -> ESP32 made sense, but now we have 10+ different version They've been hanging around with Sony. Apple: AirPods Sony: WMDF559J649Q-1

I can’t say Apple’s naming approach is perfect. Those AirPods you’ve mentioned are actually “ AirPods Pro 2 with MagSafe Charging Case (USB-C)” or something.

Re: ESP32-S31

#135

Post by cbdevidal »

I personally am itching for more hardware H.264 or even H.265. There's the ESP32-P4 but it requires a second ESP32 to handle the WiFi. I got it working, but it feels like a hack, and the BOM cost is more than 2x a single chip.

Course more PSRAM and hardware encoding would drive up the price...

Re: ESP32-S31

#136

Post by volemo »

jml7c5 wrote: post #38

Previous discussion from two months ago, when this was announced: https://news.ycombinator.com/item?id=47561678

Damn, I’ve only checked the last month for duplicates.

Re: ESP32-S31

#137

Post by redfast00 »

From the datasheet, I see that there is a Bitscrambler peripheral that seems to be very similar in flexibility to the Raspberry Pi Pico's PIO:

> Since bitwise operations can be relatively CPU-intensive and DMA is designed specifically to offload such work from the CPU, ESP32-S31 integrates two dedicated peripherals called BitScramblers. These modules are designed to transform data formats during transfers between memory and peripherals. One BitScrambler handles memory-to-peripheral (or memory-to-memory) transfers, while the other is dedicated to peripheral-to-memory transfers. While BitScramblers can handle the bitwise operations mentioned earlier, they are in fact flexible, programmable state machines capable of performing more advanced transformations as well.

Here's hoping that it's as useful as the Pi Pico's PIO

Re: ESP32-S31

#138

Post by taude »

randomint64 wrote: post #3

Espressif is on fire! And the CPU even has SIMD instructions! RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs. Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with…

I need the equivalent of Claude Code, but for hardware projects, so I can actually do all the projects I envision with the EPS32s.

Something that combines: 3d printing; auto procurement of parts; custom software writing; maybe a robot arms or something, all in a nice box on my desk that I feed parts into like a mail slot. PROFIT.

Re: ESP32-S31

#140

Post by ape4 »

randomint64 wrote: post #3

Espressif is on fire! And the CPU even has SIMD instructions! RISC-V cores is a big deal for embedded systems because now compiling for SoCs is only a matter of `rustup target add riscv32imac-unknown-none-elf` instead of downloading half-broken proprietary toolchains and SDKs. Take a look at https://kerkour.com/introduction-to-embedded-development-wit... and https://kerkour.com/rust-esp32-pentest to get started with…

Its good you can do that but the command doesn't exactly roll off the tongue.
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