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I am using TIVA TM4C1237H controller .I wish to interface Keyboard and Pendrive to it.I am using FSUSB11MTX for multiplexing them.Using a GPIO pin I select the FSUSB11MTX . Now Iam able to interface 2 keyboards and switch between them .But while using pendrive I am able to transfer files as long as there is no device in the other port.As soon as I connect any device in other port the system hangs and shows unknown device for both ports.
I guess there is issue in creating interrupts. Please look into the matter today itself ,as soon as possible.The development process is now interrupted by this minor USB glitch.
Regards, Dhanush Nair
hi Tsuneo, I am using TPS 2051 IC for giving VBUS supply as shown in fig. For switching D+ and D- i am using FSUSB11MTX IC.
+5V + VBUS | | | ---------------- | |--|------| IN OUT|----|6 | | | | | | |------| IN OUT|----|7 | | | | | Vusb0epe--EN OUT|----|8 capacitor-( | | | | Usb0flt---OCn | | | | | | Gnd| ---|-GND | -( capacitor | | | | Gnd| |________________| |Gnd
TPS 2051