Dear experts
I am experiencing problems communicating with a 68013 from a uClinux environment on a BF548 EZKIT board. I make use of libusb as the underlying layer. The board has a USB2.0 OTG controller which has been configured as host. I do not have access to the 68013 code as it is from a third party vendor who cannot change it. I have succesfully downloaded the code using a libusb port of fxload. When the controller switches into its new configuration, I try to do bulk reads from endpoint 84. With exactly the same code, I succeed on a Windows machine (using libusb-win32) and on a Suse Linux box. On the embedded board, the reads return a 1 byte 0 all the time. I know this points to inconsistencies on the hardware level - but I really dont know what to do anymore. Has anyone succeeded in getting FX2 bulk reads working in an embedded environment?
The USB descriptor after configuration is:
Dev #119: 1512 PIPE PROFILER v1.0 - MARINE ELECTRONICS 1512
wTotalLength: 60
bNumInterfaces: 1
bConfigurationValue: 1
iConfiguration: 0
bmAttributes: a0h
MaxPower: 50
bInterfaceNumber: 0
bAlternateSetting: 0
bNumEndpoints: 6
bInterfaceClass: 255
bInterfaceSubClass: 0
bInterfaceProtocol: 0
iInterface: 0
bEndpointAddress: 81h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
bEndpointAddress: 01h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
bEndpointAddress: 02h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
bEndpointAddress: 84h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
bEndpointAddress: 86h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
bEndpointAddress: 88h
bmAttributes: 02h
wMaxPacketSize: 64
bInterval: 0
bRefresh: 0
bSynchAddress: 0
The simplified program is as follows (after configuration - I use a usb_reset and usb_close after configuring):
dh = usb_open(dev);
#if
defined(LIBUSB_HAS_GET_DRIVER_NP)
#if
printf("Seeing if a driver has claimed the interface");
printf("interface %i already claimed by %s - will try detach",0,name);
printf("%s\n", usb_strerror());
}
defined(LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP)if (LIBUSBLOG_usb_get_driver_np(dh, 0, (char *) name, sizeof(name)) == 0) {if (LIBUSBLOG_usb_detach_kernel_driver_np(dh, 0) < 0) {return;}
res = usb_set_configuration(dh,1);
Also included are transaction logs using a usbmon program from the blackfin BF548 and Suse
#endif
#endif
