xdsitxss_video_test_example.c File Reference

Overview

This file contains a design example using the XDsiTxSs driver.

It performs a video test on the MIPI DSI Tx Subsystem. It tests DSI TX functionality with following sequence. Presently the application is supporting only RGB888 format. 3 bytes per pixel BRAM – (MM2S)–VDMA (MM2S)–DSI TX– CSI RX – (S2MM)VDMA(S2MM)–BRAM This function will read input from BRAM0, provide BRAM input to VDMA MM2S, VDMA feeds MM2S input to DSI TX controller, the output of DSI will be connected to CSI RX controller. The output of CSI given to S2MM of VDMA. VDMA writes S2MM data on BRAM1. Finally compare BRAM0 and BRAM1 data User has to provide all necessary inputs as per desired resolution

Note

None.

MODIFICATION HISTORY:

Ver Who Date    Changes



1.0 ram 11/2/16 Initial Release for MIPI DSI TX subsystem
1.1 ms  01/23/17 Modified xil_printf statement in main function to
                 ensure that "Successfully ran" and "Failed" strings
                 are available in all examples. This is a fix for
                 CR-965028.

Functions
u32	DsiTxSs_VideoTestExample (u32 DeviceId)
	This function is the main entry point for the video test example using the XDsiTxSs driver. More...
s32	WaitForCompletion (s32 VdmaChannel, u32 *VdmaBaseAddr)
	This function wait until the DMA channel halts. More...
void	ResetVDMA ()
	This function ResetVDMA. More...
void	ConfigureChannel (u32 VdmaChannel)
	This function to setup Horizontal size and stride. More...
void	SetupVdmaCR (s32 VdmaChannel, s32 FrameCount)
	This function to setup the VDMA Control Register. More...
void	StartChannel (s32 VdmaChannel, s32 VerticalSize)
	This function to start mm2s or s2mm VdmaChannel - write the vertical size. More...
s32	main ()
	This is the main function for XDsiTxSs self test example. More...

Function Documentation

void ConfigureChannel

(

u32

VdmaChannel

)

This function to setup Horizontal size and stride.

Parameters

VdmaChannel

specifes VdmaChannel is MM2S or S2MM

Returns

None

Note

None.

Referenced by DsiTxSs_VideoTestExample().

u32 DsiTxSs_VideoTestExample

(

u32

DeviceId

)

This function is the main entry point for the video test example using the XDsiTxSs driver.

Parameters

DeviceId

is the unique device ID of the MIPI DSI RX Subsystem core.

Returns

• XST_FAILURE if any of MIPI DSI RX Subsystem sub-core self test failed.
• XST_SUCCESS, if all of MIPI DSI RX Subsystem sub-core self test passed.

Note

None.

References XDsiTxSs_Config::BaseAddr, ConfigureChannel(), ResetVDMA(), SetupVdmaCR(), StartChannel(), WaitForCompletion(), XDsiTxSs_Activate(), XDsiTxSs_CfgInitialize(), XDsiTxSs_LookupConfig(), XDsiTxSs_Reset(), XDsiTxSs_SelfTest(), and XDsiTxSs_SetCustomVideoInterfaceTiming().

Referenced by main().

s32 main

(

)

This is the main function for XDsiTxSs self test example.

Parameters

None.

Returns

• XST_SUCCESS if the self test example passed.
• XST_FAILURE if the self test example was unsuccessful.

Note

None.

References DsiTxSs_VideoTestExample().

void ResetVDMA

(

)

This function ResetVDMA.

Parameters

None

Returns

None

Note

None.

Referenced by DsiTxSs_VideoTestExample().

void SetupVdmaCR	(	s32	VdmaChannel,
		s32	FrameCount
	)

This function to setup the VDMA Control Register.

Parameters

VdmaChannel	specifes VdmaChannel is MM2S or S2MM
FrameCount	specifies number of frames to transfer

Returns

None

Note

None.

Referenced by DsiTxSs_VideoTestExample().

void StartChannel	(	s32	VdmaChannel,
		s32	VerticalSize
	)

This function to start mm2s or s2mm VdmaChannel - write the vertical size.

Parameters

VdmaChannel	specifes VdmaChannel is MM2S or S2MM
VerticalSize	specifes No of lines

Returns

None

Note

None.

Referenced by DsiTxSs_VideoTestExample().

s32 WaitForCompletion	(	s32	VdmaChannel,
		u32 *	VdmaBaseAddr
	)

This function wait until the DMA channel halts.

Parameters

VdmaChannel	specifes VdmaChannel is MM2S or S2MM .
VdmaBaseAddr	VDMA base address

Returns

MM2S_HALT_SUCCESS, S2MM_HALT_SUCCESS in success MM2S_HALT_FAILURE, S2MM_HALT_FAILURE on failure

Note

None.

Referenced by DsiTxSs_VideoTestExample().