golang libusb wraper
2021/11/18 23:42:56
本文主要是介绍golang libusb wraper,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
https://pkg.go.dev/github.com/google/gousb
package main import ( "fmt" "log" "github.com/google/gousb" ) func main() { // Initialize a new Context. ctx := gousb.NewContext() defer ctx.Close() // Iterate through available Devices, finding all that match a known VID/PID. vid, pid := gousb.ID(0x04f2), gousb.ID(0xb531) devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool { // this function is called for every device present. // Returning true means the device should be opened. return desc.Vendor == vid && desc.Product == pid }) // All returned devices are now open and will need to be closed. for _, d := range devs { defer d.Close() } if err != nil { log.Fatalf("OpenDevices(): %v", err) } if len(devs) == 0 { log.Fatalf("no devices found matching VID %s and PID %s", vid, pid) } // Pick the first device found. dev := devs[0] // Switch the configuration to #2. cfg, err := dev.Config(2) if err != nil { log.Fatalf("%s.Config(2): %v", dev, err) } defer cfg.Close() // In the config #2, claim interface #3 with alt setting #0. intf, err := cfg.Interface(3, 0) if err != nil { log.Fatalf("%s.Interface(3, 0): %v", cfg, err) } defer intf.Close() // In this interface open endpoint #6 for reading. epIn, err := intf.InEndpoint(6) if err != nil { log.Fatalf("%s.InEndpoint(6): %v", intf, err) } // And in the same interface open endpoint #5 for writing. epOut, err := intf.OutEndpoint(5) if err != nil { log.Fatalf("%s.OutEndpoint(5): %v", intf, err) } // Buffer large enough for 10 USB packets from endpoint 6. buf := make([]byte, 10*epIn.Desc.MaxPacketSize) total := 0 // Repeat the read/write cycle 10 times. for i := 0; i < 10; i++ { // readBytes might be smaller than the buffer size. readBytes might be greater than zero even if err is not nil. readBytes, err := epIn.Read(buf) if err != nil { fmt.Println("Read returned an error:", err) } if readBytes == 0 { log.Fatalf("IN endpoint 6 returned 0 bytes of data.") } // writeBytes might be smaller than the buffer size if an error occurred. writeBytes might be greater than zero even if err is not nil. writeBytes, err := epOut.Write(buf[:readBytes]) if err != nil { fmt.Println("Write returned an error:", err) } if writeBytes != readBytes { log.Fatalf("IN endpoint 5 received only %d bytes of data out of %d sent", writeBytes, readBytes) } total += writeBytes } fmt.Printf("Total number of bytes copied: %d\n", total) }
这篇关于golang libusb wraper的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-10-012024年每个初学者都应该知道的Django十大技巧
- 2024-09-30云原生周刊:Argo CD v2.13 发布候选版本丨2024.9.30
- 2024-09-29哪个更快:OpenAI Whisper、Google TTS 还是 Piper TTS??
- 2024-09-29MLOps 端到端系统在 Google 云平台(I):赋能预测解决方案
- 2024-09-26通过 gcloud CLI 认证从本地脚本写入 Google Sheets
- 2024-09-24GoLand 新建项目 Enable vendoring support automatically 的作用是什么?-icode9专业技术文章分享
- 2024-09-21MongoDB资料:新手入门与初级应用指南
- 2024-09-20MongoDB教程:初学者必备指南
- 2024-09-05MongoDB入门:快速掌握NoSQL数据库基础
- 2024-08-28go 项目中怎么打印调试-icode9专业技术文章分享