How can debug CX3 MIPI CSI-2 RX to GPIF?

[Anonymous]

Hi,

   I want to use CX3 to receive 1280x720p@15hz YUV422 sensor input and My CX3 MIPI Setting is as follow,

	CY_U3P_CSI_DF_YUV422_8_2,//CY_U3P_CSI_DF_YUV422_8_2, //CY_U3P_CSI_DF_RAW10,	/* dataFormat   */
	2,	/* numDataLanes */
	7,	/* pllPrd (0x0F = 15)	*/
	333,	/* pllFbd (0x1FF = 511)	*/  //400.8MHz  19.2*(333+1)/(7+1)/2^1 = 400.8
	CY_U3P_CSI_PLL_FRS_250_500M,	/* pllFrs	*/
	CY_U3P_CSI_PLL_CLK_DIV_8,	/* csiRxClkDiv  */  //mipi detect clk 100 mhz  ,
	CY_U3P_CSI_PLL_CLK_DIV_8,	/* parClkDiv	*/  //para 100Mhz
	0x0806,	/* mclkCtl	*/
	CY_U3P_CSI_PLL_CLK_DIV_2,	/* mClkRefDiv   */  //12  400.8/2 / (8+1+6+1) = 12.525  (12.5)
	1280,				/* uint16_t hResolution */
	1

When I use AMPCAP to preview, CX3 Firmware UVCGpifCB always stay in state "CX3_PARTIAL_BUFFER_IN_SCK1" so the DMA callback is not work. What does it mean? How can I debug this issue? Thanks.

[Anonymous]

Hi,

Can you please probe the HSYNC and VSYNC lines and check if the behavior is expected one?

Regards,

- Madhu Sudhan

[Anonymous · Accepted solution]

Hi,

Your MIPI settings and calculations shown are not correct.  You can use the CX3 config tool to generate the proper MIPI settings rather than using your own calculations.

Regards,

Savan