OSFP-EVB

aliexpressで安い、OSFP対応のEVBを見つけて購入。

https://ja.aliexpress.com/item/1005006306962550.htm

基板上に乗っているUSB/I2Cデバイスは、CH341T。ドライバを検索する。

https://www.wch-ic.com/downloads/CH341DS1_PDF.html

https://www.wch-ic.com/downloads/CH341PAR_EXE.html

「デバイスマネージャー」でinterface/USB-EPP/I2C..CH341Aと現れる

https://www.wch-ic.com/downloads/CH341PAR_ZIP.html

DLL library

Sample programs

https://www.onetransistor.eu/2017/09/ch341a-usb-i2c-programming.html

http://www.neko.ne.jp/~freewing/software/wch_ch341a_i2c_control_windows_visual_c/

https://github.com/command-tab/ch341eeprom/tree/master

c# samples

https://learn.microsoft.com/ja-jp/dotnet/iot/tutorials/temp-sensor

#include <iostream>#include <iomanip>#include <Windows.h>#include <tchar.h>#include <stdio.h>#include "CH341DLL_EN.H"
#pragma comment(lib,"./CH341DLLA64.LIB")
//BOOL WINAPI CH341ReadI2C( // Reads one byte of data from the I2C interface//ULONG iIndex, // Specify the CH341 device serial number//UCHAR iDevice, // The lower 7 bits specify the I2C device address//UCHAR iAddr, // Specifies the address of the data unit//PUCHAR oByte ); // Point to a byte unit, used to save the read byte data
int main(){    int i;    UCHAR data;
    std::cerr << "SFP/QSFP/OSFP EEPROM A0h dump via CH341\n";    // Device Index Number    ULONG iIndex = 0;
    // Open Device    HANDLE h = CH341OpenDevice(iIndex);
    // DLL verison    ULONG dllVersion = CH341GetVersion();    std::cerr << "DLL verison " << dllVersion << "\n";
    // Driver version    ULONG driverVersion = CH341GetDrvVersion();    std::cerr << "Driver verison " << driverVersion << std::endl;
    // Device Name    PVOID p = CH341GetDeviceName(iIndex);    std::cerr << "Device Name " << (PCHAR)p << std::endl;
    // IC verison 0x10=CH341,0x20=CH341A,0x30=CH341A3    ULONG icVersion = CH341GetVerIC(iIndex);    std::cerr << "IC version " << std::hex << icVersion << std::endl;
    // Reset Device    BOOL b = CH341ResetDevice(iIndex);    std::cerr << "Reset Device " << b << std::endl;
    for (i = 0; i < 0xff; i++) {     BOOL b = CH341ReadI2C(iIndex, 0x50, i, &data);     printf(" %02X :", (0xff &(char)data));    }}

Windowsアプリケーションの開発環境

Windows GUIのアプリをVisual Stdioで作成する際に、SDKや言語の組み合わせが複数あって迷う。

.Net Framework Forms
少し前の主流、ググると色々情報もあるので便利だけどちょっと古臭い？特に画面解像度が混在した時の考慮がされていない。まぁ十分なんだけど今更なぁという感じ。
WPF(Windows Presentation Frame work) + .NET 8.0
今風、BUGもまだ多いらしい。次も控えている。
MAUI(Multi Application User Interface)
Mac やIphoneでも動く。クロスプラットフォームな環境。