Android USB Accessory相关知识

1 开发板

Arduino ATmega2560

2 USB Host

CH375

EPSON S1R72U06, UART to USB host

EPSON S1R72U16 (compared to Scan Logic SL811HST), IDE to USB host

Maxim MAX3421E, SPI to USB host

3 VID和PID分类

VID = 0x18D1，PID在不同的配置下分别如下所示：

0x2D00 - accessory

0x2D01 - accessory + adb

0x2D02 - audio

0x2D03 - audio + adb

0x2D04 - accessory + audio

0x2D05 - accessory + audio + adb

4 Accessory切换通知字符串

ACCESSORY=START