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

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