Tool/software: TI-RTOS
Hi all,
I use the project to test my USB peripheral.I connect a HID mouce to my USB_A slot.The mouse is fine(it works well with my windows pc).When I project starts, the led under the mouse is on and its voltage
is about 5v but the program is blocked at the taskFxn : USBMH_waitForConnect(BIOS_WAIT_FOREVER) .I debug the code step by step and find the error status :state == USBMH_NO_DEVICE.
I am afraid that there is something neccessary but i just neglect in my configuration.Is there some more thing before I conduct the project?
I just compile the raw project and add nothing to the file .cfg and teh project Properties.Then I plug a HID mouse in my USB_A (VBUS, D-, D+, GND) and debug.
I measure the voltage of my USB_A:
VBUS : 4.9, D-: 2.8V, D+: 0V, GND:0V
Could you give me some suggestions to help me slove the trouble ? eg: measure some voltage or impedance or modify some software configuration.