Hi all,
We made a product based on SimpleBLEPeripheral using CC2540USB stack and developed a windows PC software to communicate to CC2540 through USB CDC.
We develop the CC2540 according to the following threads.
http://e2e.ti.com/support/low_power_rf/f/538/t/212926.aspx
http://e2e.ti.com/support/low_power_rf/f/538/p/219646/775872.aspx#775872
We use the C:\Texas Instruments\BLE-CC2540-1.3\Accessories\Drivers\usb_cdc_driver_cc2540.inf on win xp, win7. And use the driver for win8 from the thread http://e2e.ti.com/support/low_power_rf/f/538/p/243424/851791.aspx#851791.
We assumed that these two drivers should work, but on some machine we couldn't install the cdc driver in device monitor and CC2540 always showed up as unknown device on these machines.
We used the same CC2540 to do the following tests:
Windows OS Driverr Result
win XP usb_cdc_driver_cc2540.inf OK
win 7 32bit usb_cdc_driver_cc2540.inf OK on some machines
win 7 64bit usb_cdc_driver_cc2540.inf OK on some machines
win 8 32bit ccxxxx_usb_cdc.inf ccxxxx_usb_cdc.cat OK
win 8 64bit ccxxxx_usb_cdc.inf ccxxxx_usb_cdc.cat OK
We just found that the driver failed when halUartPollEvt get no USBIRQ_EVENT_SETUP from USBIRQ_GET_EVENT_MASK.
What would we do to disable and clean up USB when CC2540 is going to low power mode?
