Lowyat.NET: Latest topics by meenn

Console apps development

meenn — Sun, 23 Jan 2022 10:23:48 +0800

Want someone to create console apps for you but all of them are web / mobile developers?
I can help! Be it Windows, Linux or MenuetOS, I can create them using Win32 API, Linux syscalls (int 0x80) or MenuetOS syscalls (int 0x60).

I can try creating GUI apps as well but my specialization is console apps, also known as command-line programs or CLI.

Types of console apps you can create are, but not limited to:
🌟 Text-to-PDF converter (single or multiple files at once)
🌟 Image-to-ASCII / ANSI art converter
🌟 Hex dump / binary file viewer (text mode)
🌟 21x21 QR code generator (text mode)
🌟 AES128 files encoder / decoder (single or multiple files at once)
🌟 CPU identification utility (CPU brand, CPU name, SSE/AVX presence etc) as DLL for your C# / VB.NET project
🌟 Audio-CD tray open / play / stop, as DLL for your C# /VB.NET project

* DLL is dynamic linking library, or P/Invoke, in which I create the DLL in low-level programming for you to use in .NET project, or any other environment where DLL import is supported.

This is a personal freelance service, but I can issue invoice as company name also (using my friend's computer shop name).

The portfolio (or sample programs) is available upon request.

Please feel free to contact: hello@fliermate.com, or WhatsApp 011-3314 0285. Thanks a lot!

Anyone work for karaoke software company?

meenn — Wed, 19 Jan 2022 04:01:25 +0800

Has anyone work for Karaoke software company before?

How is it like working as system support there?

USB versioning

meenn — Fri, 14 Jan 2022 18:21:24 +0800

So I want to start coding for USB, but I found out so many versions in USB.

In early years, maybe 1994~96, there is UHCI.
Then OHCI,
EHCI - USB 2.0
XHCI - USB 3.0

They even have AHCI, but couldn't find it on official site.

Well, the purpose of this thread is to let coders familiar with USB versioning of different standard or specification.

For example, one can download HID( USB 1.11) spec in PDFs from USB official site:
usb.org/documents?search=hid&items_per_page=50

So, I still haven't figure out UHCI ealier, or OHCI earlier.

Writing a USB driver and HID parser is not easy, and there is also Report Descriptor, example header like this:

This is for wheel mouse: (a bit outdated)

CODE

char ReportDescriptor[118] = {
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x02, // USAGE (Mouse)
0xa1, 0x01, // COLLECTION (Application)
0x09, 0x02, // USAGE (Mouse)
0xa1, 0x02, // COLLECTION (Logical)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
// ------------------------------ Buttons
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x05, // USAGE_MAXIMUM (Button 5)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x75, 0x01, // REPORT_SIZE (1)
........
......