I am trying to configure my device to output higher resolutions speeds at USB2.0/high speed. Specifically 720p at 30 FPS. I believe there should be enough bandwidth to support that at high speed. However I can go lower if that is not the case.
The current code example I am using provides just one setting at 640x480. I have been able to coax the USB side to recognize that I should be running at 720p however no frames show up. I assume there is some combination of buffers and pll configurations that i am not understanding. here are the important code snippets.
USB descriptor (seems to be working)
/* Class specific Uncompressed VS frame descriptor 2 - 720p@ 30fps*/
0x1E, /* Descriptor size */
ES_UVC_CS_INTRFC_DESCR, /* Descriptor type*/
0x05, /* Subtype: Uncompressed frame interface*/
0x01, /* Frame Descriptor Index: 1 */
0x00, /* No Still image capture method supported */
0x00, 0x05, /* Width in pixel: 720 */
0xD0, 0x02, /* Height in pixel: 1280 */
0x00, 0x00, 0x5E, 0x1A, //720 x 1280 x 2 x 30 x 8 = 442368000 */
0x00, 0x00, 0x5E, 0x1A, //720 x 1280 x 2 x 30 x 8 = 442368000 */
0x00, 0x20, 0x1C, 0x00, /* Maximum video frame size in bytes(Deprecated): 1280 x 720 x 2 */
0x15, 0x16, 0x05, 0x00, /* Desired frame interval in 100ns = (1/30)x10^7 = 333,333.33 */
0x01, /* Frame interval type : No of discrete intervals */
0x15, 0x16, 0x05, 0x00, /* Desired frame interval in 100ns = (1/30)x10^7 = 333,333.33 */
probe control (possible point of failure)
/* UVC Probe Control Setting - 720p@30fps(HighSpeed)*/
uint8_t const gl720p30FPSProbeCtrl[ES_UVC_MAX_PROBE_SETTING] = {
0x00, 0x00, /* bmHint : No fixed parameters */
0x01, /* Use 1st Video format index */
0x01, /* Use 2nd Video frame index */
0x15, 0x16, 0x05, 0x00, /* Desired frame interval in 100ns = (1/30)x10^7 = 333,333.33 */
0x00, 0x00, /* Key frame rate in key frame/video frame units */
0x00, 0x00, /* PFrame rate in PFrame / key frame units */
0x00, 0x00, /* Compression quality control */
0x00, 0x00, /* Window size for average bit rate */
0x00, 0x00, /* Internal video streaming i/f latency in ms */
0x00, 0x20, 0x1C, 0x00, /* Max video frame size in bytes: 720 x 1280 x 2*/
0x00, 0x30, 0x00, 0x00 /* No. of bytes device can rx in single payload */
};
mipi control (possible point of failure)
/* Configuration parameters for 720p @30FPS for the OV5640 sensor */
CyU3PMipicsiCfg_t cfgUvc720p30NoMclk = {
CY_U3P_CSI_DF_YUV422_8_2, /* dataFormat */
1, /* numDataLanes */
1, /* pllPrd */
62, /* pllFbd */
CY_U3P_CSI_PLL_FRS_250_500M, /* pllFrs */
CY_U3P_CSI_PLL_CLK_DIV_4, /* csiRxClkDiv */
CY_U3P_CSI_PLL_CLK_DIV_4, /* parClkDiv */
0x00, /* mclkCtl */
CY_U3P_CSI_PLL_CLK_DIV_8, /* mClkRefDiv */
1280, /* hResolution */
50 /* fifoDelay */
};
resulting code in application
buffer switch (likely where my problem)
switch(CyU3PUsbGetSpeed())
{
case CY_U3P_HIGH_SPEED:
endPointConfig.pcktSize = 0x200;
endPointConfig.burstLen = 1;
ES_UVC_STREAM_BUF_SIZE = ES_UVC_HS_STREAM_BUF_SIZE;
ES_UVC_DATA_BUF_SIZE = ES_UVC_HS_DATA_BUF_SIZE;
ES_UVC_STREAM_BUF_COUNT = ES_UVC_HS_STREAM_BUF_COUNT;
break;
where
#define ES_UVC_HS_STREAM_BUF_SIZE (ES_UVC_HS_DATA_BUF_SIZE + ES_UVC_PROD_HEADER + ES_UVC_PROD_FOOTER)
#define ES_UVC_HS_DATA_BUF_SIZE (3056) /* DMA Buffer Data Size Used: 3056 Bytes*/
#define ES_UVC_HS_STREAM_BUF_COUNT (8)
#define ES_UVC_PROD_HEADER (12) /* UVC DMA Buffer Header Size */
#define ES_UVC_PROD_FOOTER (4) /* UVC DMA Buffer Footer Size */
mipi selection (likely second point of failure)
else if (CyU3PUsbGetSpeed () == CY_U3P_HIGH_SPEED)
{
status = CyU3PMipicsiSetIntfParams (&cfgUvc720p30NoMclk, CyFalse);
if (status != CY_U3P_SUCCESS)
{
CyU3PDebugPrint (4, "\n\rUSBStpCB:SetIntfParams SS2 Err = 0x%x", status);
}
esOV5640_720P_config
//also tried esOV5640_720P_HS_config();
probe selection
else if (CyU3PUsbGetSpeed () == CY_U3P_HIGH_SPEED)
{
CyU3PMemCopy(glProbeCtrl, (uint8_t *)gl720p30FPSProbeCtrl, ES_UVC_MAX_PROBE_SETTING);
