3 Replies Latest reply on Mar 15, 2017 10:53 PM by nisa

    Does the FX3 with sdk 1.3.3 support multi-bursts in the super speed mode?

    yuzheng.zhang_1668291
              We are using the FX3 in the isochronous mode to transfer UVC data. It is based on the example code 'uvc_example/cyfxuvcinmem' in the sdk (version 1.3.3). The host is the Ubuntu Linux with libusb/libuvc. PKT_SIZE 0x400 SS_MULT 3 SS_BURST 1 Interval 1 DMA_BUF_SIZE 0x400*3*SS_BURST The endpoint uses 0x83 It works if the frame rate is low and SS_BURST=1. It fails if set SS_BURST > 1 or with high frame rates. Does the FX3 with sdk 1.3.3 support multi-bursts in the super speed mode? I see a statement in file cyfxuvcinmem.h. Does it mean SS_BURST >1 not supported? /* Burst setting for USB 3.0. UVC-Iso does not support burst as yet. */ #define CY_FX_EP_ISO_VIDEO_SS_BURST (1) and read the document AN86947 (Optimizing USB3.0 Throughput with FX3). It seems work with multi-bursts. Any advice and suggestions will be greatly appreciated