mmoskal

14 ms·

151.
by mmoskal 3y ago
Promised docs here: https://microsoft.github.io/devicescript/language/runtime#wh...
152.
by mmoskal 3y ago
The consequences of a type unsoundness in TypeScript are typically much more benign (an exception typically) than in C (a buffer overflow, arbitrary code execution, etc.). Also the application logic is more visible in TypeScript just due to
153.
by mmoskal 3y ago
We're the same people who founded MakeCode. DeviceScript has a very different target audience (professional TypeScript developers vs students), is easier to port to different architectures, is more tied into VSCode, and is more compati
154.
by mmoskal 3y ago
SPI is now supported (though only on ESP32 right now; PRs are welcome elswhere!), just fixed the docs. DMA is typically bundled with some other driver (like SPI). We do support ADC - there is even a funky way of exposing these nicely as Jac
155.
by mmoskal 3y ago
Exactly! But it's more like 1.50 USD (ESP32-C3 or RP2040 compared to say STM8).
156.
by mmoskal 3y ago
We need to add a doc page about relationship with WASM... In short, WASM was not designed to be interpreted, and definitely not on small devices. The DeviceScript VM bytecode is designed to run directly from flash (read-only memory of which
157.
by mmoskal 3y ago
Thank you! fix coming https://github.com/microsoft/devicescript/commit/a59e8aafce2...
158.
by mmoskal 3y ago
DeviceScript comes with a source-level debugger for the VM code. Indeed, if you add C code and that crashes it maybe harder to debug than a pure C system, however it wasn't my experience while developing DeviceScript - it was either cl
159.
by mmoskal 3y ago
There are some differences, but broadly correct (eg., the program is precompiled and the experience is definitely the best in VSCode; plus of course different language). However, I heard of uPython being used in production deployments, thou
160.
by mmoskal 3y ago
It should about the same as uPython. There is a few more tricks we can play due to whole program compilation but I don't think we take advantage of that yet.
161.
by mmoskal 3y ago
I guess the question was about board with specs similar to Pi Pico (~264kB of RAM) and the Star64 is more similar to RPi4 (~4GB of RAM).
162.
by mmoskal 3y ago
There are often some RTC registers that get preserved during standby, so you can use that instead of flash or EEPROM.
163.
by mmoskal 3y ago
Same people :) We tried to make DeviceScript closer in semantics to real JS (prototypes etc) and easier to port. You pay with performance.
164.
by mmoskal 3y ago
There are many choices we have made that wouldn't make sense on desktop class cpu... 5 orders of magnitude of difference in RAM size is somewhat significant in design choices :)
165.
by mmoskal 3y ago
Well, if you have a fixed RAM size, you're better off with the largest model you can fit at 4 bits (13B 4b is way better than 7B 16b despite being twice smaller).
166.
by mmoskal 3y ago
.d.ts files are produced by Typescript compiler automatically from .ts files (and can be written manually for .js files). ML signature files are much like .h files and I think for the same reason - to make compiler work easier. Edit: as thi
167.
by mmoskal 3y ago
More specifically, time is almost linear with the size of the type, which can be doubly exponential compared to the program but people don't write such programs.
168.
by mmoskal 3y ago
On STM32 you typically need to go to STOP mode (called deep sleep in places) to get significant power savings. I had F0 and G0 waking up at 100Hz plus on pin interrupts (with maybe 30us latency) consuming 50-100uA (compared to maybe 20mA wi
169.
by mmoskal 3y ago
Digital signatures on photos, with each camera certificate signed by the manufacturer. Not sure why they don't do it at scale yet.
170.
by mmoskal 4y ago
TFA is about training, which happens at 16-32 bits.
171.
by mmoskal 4y ago
Ironically city of Seatac was one of the first with $15/hr min wage and now has $19 - highest in the US.
172.
by mmoskal 4y ago
> Get leaded solder when possible. I've had good results with SnBi soldering wire - it has low melting temperature and you don't have to be so careful with hand washing (I think ;) I got mine from LCSC shipped from China, but i
173.
by mmoskal 4y ago
Typically these SPI screens only work up to 50MHz (which is already way out of spec, which is often 15MHz), there is 5M bits in 640x480x16 so you won't get more than 10fps no matter what you do rendering side. Which is why they often a
174.
by mmoskal 4y ago
I was really interested in seeing what's the % of years of human live lived in different historical periods. I wrote a script [0] and it turns out [1], 90% of time was lived after the agricultural revolution (last 10k years) and 50% of
175.
by mmoskal 4y ago
There's ESP32-C3. I think it sells in decent volumes. Note sure where did they license the RISC-V core on it (they otherwise use Xtensa). There's probably more parts with data sheets in Chinese only.
176.
by mmoskal 4y ago
It says it has indentation syntax but it clearly uses braces TypeScript-like. I wonder why author describes it as a mix between Python and TypeScript.
177.
by mmoskal 4y ago
Interestingly TypeScript compiler doesn't use types for compilation (that's why you can have esbuild that compiles Typescript without understanding the type system). That is the end result of type computation is... Nothing, always
178.
by mmoskal 4y ago
It looks like the Tensillica is only DSP. The control core is M0. 1mW is quite low though - typical M0 running at full speed would typically be 10-100mW and they have the neural unit on as well.
179.
by mmoskal 4y ago
If you have ESP (most of them anyways) you don't really need the RP2040 anymore - you can run all your code on the ESP. Also there are all that geopolitical concerns about Chinese networking gear coming with more than you asked for.
180.
by mmoskal 4y ago
nit: MCU is Micro Controller Unit, so for example rp2040 itself. What you mean is "board". Completely right on the power consumption though. The NRF52 is also quite good at limiting power consumption while it's running and au

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