MQX Software SolutionsのトピックUSB Pin Configuration change in MQX USB Stack.

USB Pin Configuration change in MQX USB Stack.

panks — Thu, 20 Mar 2014 15:03:57 GMT

Hi,

I have used the MQX usb Stack for my usb application and TWRMCF54418 board for testing. In tower board schematic USBH_DP and USBH_DM pin are used for usb communication. In my board schematic i have used USBO_DP and USBO_DM pin for usb communication. Then what are the changes i have to do in MQX usb stack or which register i have to configure to change the usb pin.

Regards,

Panks

Re: USB Pin Configuration change in MQX USB Stack.

soledad — Tue, 25 Mar 2014 21:32:27 GMT

Hi,

look into the file

<Freescale MQX 4.1_install_path>\mqx\source\bsp\twrmcf54418\twrmcf54418.h

on line 154, USB related board definitions start.

USBCFG_USBOTG_CONNECTOR can't be set to USBCFG_CONNECTOR_STANDARD in this bsp, as on tower there is no physical connection. but you change it here if your have custom board, where physical connection is available

line 174 and 175 assign usb modules to host/device stack. per

<Freescale MQX 4.1_install_path>\mqx\source\bsp\twrmcf54418\init_usb.c,

ehci0 is USBOTG module, ehci1 is USBHOST module.

Regards,

Sol

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Re: USB Pin Configuration change in MQX USB Stack.

panks — Wed, 26 Mar 2014 07:45:30 GMT

Hi Soledad,

Thanks for reply,

Actually the usb connection as follow in my usb board....

USBO_VBUS_EN --->G13 (mcf54418 pin)

USBO_VBUS_OC---->H15 (mcf54418 pin)

USBO_DM---->A14 (mcf54418 pin)

USBO_DP---->B14 (mcf54418 pin)

IRQ6---->USB_OTG_VBUS( HERE USED ORed GATE IC ---- TO DETECT VBUS SIGNAL)

IRQ7 (F12)---> ( ID pin are connected here)

I have to used internal usb otg controller . I am using usb module as a device, but when i plug in usb i have get high signal at pin IRQ6 ( Vbus detect signal). but in twr IRQ6 pin are used for clock....then how to handle the IRQ6 pin event in usb stack and also ID pin event at IRQ7.....because in twr board external usb controller used for usb otg.....

please suggest me the proper changes in usb stack as per my above usb connection.

Thanks &Regards,

Panks