IMX6 OTG does not work in host mode

[shengyu]

I have an IMX6 sabre SD board running Android version 4.4.2.

The USB OTG port works fine in device mode , but does not work in host mode when a usb mouse or usb camera is connected to the board.

Hardware setting：
1. USB_OTG_ID connect to ENET_RX_ER, no pull up and pull down resistor (pull up resistor is NC).
2. USD_VBUS is directly connected to 5V supply (VCC_5P0V), always power on.

I’m not sure the difference of Micro-B connector and Micro-AB connector. I used Mciro-B type for the connection. Whether the connection must be Micro-AB type in host mode or not?

Software setting:

MX6Q_PAD_ENET_RX_ER__ANATOP_USBOTG_ID,           /*USB_OTG_ID*/

MX6Q_PAD_GPIO1__GPIO_1_1,                                           /*USB_OTG_PWR*/

when the usb camera is connected to the board, it prints 'android_work: did not send uevent (0 0 (null))', and otg id pull down

when the usb mice is connected to the board, it prints nothing.

Any help is appreciated. 

[weidong_sun]

Hi,

   please use Micro-AB connector for your daul role design of USB OTG. When USB OTG is working at device mode, USB_OTG_ID is high level, and host mode , it is low level.

Have a nice day!

Best regards,

Weidong