2151 Results for "%EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%EC%9D%B4%EB%B2%A4%ED%8A%B8%E2%86%B2optime4%E3%80%82com%EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC %EA%B0%95%EB%82%A8%EB%A7%88%EC%82%AC%EC%A7%80 %E2%86%B2 %EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%E1%98%AE %EA%B0%95%EB%82%A8%EC%98%A4%ED%94%BC%EC%83%9D%EA%B0%81%E1%98%AE %EA%B0%95%EB%82%A8%ED%9C%B4%EA%B2%8C%ED%85%94 %EA%B0%95%EB%82%A8%ED%82%A4%EC%8A%A4%EB%B0%A9 %ED%83%80%EC%9E%84"

September 28th 2023: I can't make the linear actuator move precisely
Log from Automatic Moving Cricket Wicket
It was dumb to use a DC motor for this project. I should have just ponied up the resources for a high speed stepper. My plan was to attach a rotary encoder to the DC motor to accurately measure the number of rotations. This is not easy....First, I tried...

ETTL protocol with the EOS RP & 580 EX II
Log from Wireless ETTL flash conversion
The STM32 board was just a hair bigger than the PIC, but the biggest pieces are still the power switch, channel button, & battery. The plan is just to print an L enclosure which scotch tapes around the hot shoe & sticks up. The antenna will...

20230216b -- "Files"
Log from ROM Disassembly - AlphaSmart Pro
The gist of this unit is that you type text into a discrete 'file' and then you can edit and later transfer to a separate computer via the keyboard emulation. While whizzing through the code doing other things, various strings caught my eye, such...

In The Radio Domain
Log from Reverse-Engineering the milight on-air protocol
The first step in reverse-engineering any radio protocol is to listen to it on the air. The advent of software-defined radio makes this much, much, easier than before. For this project I've used a nuand bladeRF board and the GNURadio software stack,...

Delta coding and some stats
Log from PEAC Pisano with End-Around Carry algorithm
With the new harvest, I estimate that the perfect and maximal orbits under m=1M is around 100K. This starts to make quite a large .h file to include in the sieve generator. Not that it's such a concern but scalability, you know.... And embedding such...

20230221b -- File Inserting
Log from ROM Disassembly - AlphaSmart Pro
Intrigued by the various file-related pointers seen in deleteThisFile_EB9B, I remember that the keyboard scan routine had a final case where the bulk of the keystrokes (the printable ones) are handled, and there was a scan code to ASCII routine before...

20230221a -- File Deleting/Erasing
Log from ROM Disassembly - AlphaSmart Pro
Previously, while rummaging for scan codes, I was correlating known behaviour with key codes. One of those keys was the Clear File key (0x56). I forgot to post about that find, but it's still worthwhile to mention the file clearing operation...

Reverse Engineering from Package Data
Log from Reverse Engineering a Drone
As you can see airodump-ng picked up the WiFi of the drone and also that it is running on channel 2. Next I recorded some packages. sudo airodump-ng -w JJRC_out -c 2 -bssid 10:A4:BE:2E:77:B5 wlan0mon While recording I simply used all the functions the...

Recovering the symbol table
Log from Android offline speech recognition natively on PC
One last thing that was still missing was the symbol table. Apparently the output of the softmax layer maps directly to the symbol table, and since this output is 128 in length, I was searching for a table of this same length.The prime suspect was of...

Algorithm bits
Log from Modular Humanoid Robot "MARB"
In this log I will discuss some algorithm ideas I have in mind for MARB. Some are easy, some require higher math. 1. Weather forecast MARB will not be connected to the internet. Call me old-fashioned, but it has nothing to do with AI to get for instance...

20230214a -- Memory, cont.
Log from ROM Disassembly - AlphaSmart Pro
Operating under the current assumption that RAM is 32 KiB banked at address 0000-7fff, with the first 256 bytes masked off by special function registers and internal SRAM, some other code sections of interest were found. E.g.:ED00 loc_ED00: ED00...

Micro-coded controller deep-dive
Log from Custom circuit testing using Intel HEX files
In this project, instead of using a standard embedded processor and programming it to execute 3 tasks at hand (parsing HEX character stream, generating HEX character stream, and writing character stream to video RAM driving VGA), I created 3 independent...

20230218a -- 0x8000 double duty bit 2
Log from ROM Disassembly - AlphaSmart Pro
One thing unresolved bit of the LCD is the R/~W line. I had largely assumed that the display was write only in this product, but I was quite wrong as reading is needed at least to poll the 'busy' bit in the status register. I had found the...

20230222b A Tale of Two Translations
Log from ROM Disassembly - AlphaSmart Pro
There are several translation routines found during the file sending stuff that translate one character value into another one. Some we understand, like this one:F4DC sub_F4DC: F4DC 84 7F anda #$7F ; reset high bit F4DE 16 tab F4DF 4F clra F4E0...

SATA, DDR3, Verilog Visualizer and Other Stuff
Log from Nysa: FPGA Development Environment
SATA StatusAfter weeks of painful debugging. I have been able to read and write to the hard drive!I ran into an issue though... the speed at which I can communicate with my FPGA to/from my computer maxes out at about 16MBs and the hard drive reads/writes...

|<
<
1
2
3
4
5
>
>|