xcsiss_intr_example.c File Reference

Overview

This file contains a design example using the XCsiSs driver with interrupts.

On receiving a frame received interrupt, it will print frames received count. On receiving a short packet FIFO not empty interrupt, it will print the contents of the short packet received. On receiving DPHY, protocol or Packet level error, it will print the same On receiving any type of error interrupt the sub-system will reset

Note

This example requires an interrupt controller connected to the processor and the MIPI CSI Rx Subsystem in the system. The Camera Sensor may need some programming before via the IIC before it starts to send any video stream.

For this example to display output, the user need to implement initialization of the system (CsiSs_PlatformInit) and after MIPI CSI Rx subsystem start (XCsiSs_Start) is complete, implement configuration of the video stream source in order to provide the MIPI CSI Rx Subsystem HIP input. The functions CsiSs_PlatformInit and CsiSs_StreamSrc are declared and are left up to the user implement.

MODIFICATION HISTORY:

Ver Who Date     Changes



1.0 vsa 07/21/15 Initial release
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.
1.2 vsa 03/02/17 Added Word Count corruption interrupt

Functions
u32	CsiSs_IntrExample (u32 DeviceId)
	This function is the main entry point for the interrupt example using the XCsiSs driver. More...
u32	CsiSs_PlatformInit (void)
	This function initialize required platform-specifc peripherals. More...
u32	CsiSs_CciInit (void)
	This function initialize required IIC instance to configure and control the camera. More...
u32	CsiSs_CciSetupIntrSystem (void)
	This function setup interrupts of the IIC instance if used for the MIPI CSI Rx Subsystem. More...
u32	CsiSs_SetupIntrSystem (void)
	This function sets up the interrupt system so interrupts can occur for the MIPI CSI Rx Subsystem core. More...
void	CsiSs_DphyEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a DPHY level error event is received by the MIPI CSI Rx Subsystem core. More...
void	CsiSs_PktLvlEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a Packet level error event is received by the MIPI CSI Rx Subsystem core. More...
void	CsiSs_ProtLvlEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a Protocol decoding level error event is received by the MIPI CSI Rx Subsystem core. More...
void	CsiSs_SPktEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a Short Packet FIFO event is received by the MIPI CSI Rx Subsystem core. More...
void	CsiSs_ErrEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a Other errors event is received by the MIPI CSI Rx Subsystem core. More...
void	CsiSs_FrameRcvdEventHandler (void *InstancePtr, u32 Mask)
	This function is called when a Frame is received by the MIPI CSI Rx Subsystem core. More...
void	Delay (u32 Seconds)
	For Microblaze we use an assembly loop that is roughly the same regardless of optimization level, although caches and memory access time can make the delay vary. More...
int	main ()
	This is the main function for XCsiSs interrupt example. More...

Function Documentation

u32 CsiSs_CciInit

(

void

)

This function initialize required IIC instance to configure and control the camera.

Parameters

None.

Returns

• XST_SUCCESS if required IIC is initialized and configured successfully.
• XST_FAILURE, otherwise.

Note

None.

Referenced by CsiSs_IntrExample().

u32 CsiSs_CciSetupIntrSystem

(

void

)

This function setup interrupts of the IIC instance if used for the MIPI CSI Rx Subsystem.

Parameters

None

Returns

• XST_SUCCESS if IIC interrupt is configured successfully.
• XST_FAILURE,if IIC interrupt is failed to configure

Note

None.

Referenced by CsiSs_SetupIntrSystem().

void CsiSs_DphyEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a DPHY level error event is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for DPHY level error event.

Referenced by CsiSs_SetupIntrSystem().

void CsiSs_ErrEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a Other errors event is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for Other error event.

Referenced by CsiSs_SetupIntrSystem().

void CsiSs_FrameRcvdEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a Frame is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for Frame Receieved event.

Referenced by CsiSs_SetupIntrSystem().

u32 CsiSs_IntrExample

(

u32

DeviceId

)

This function is the main entry point for the interrupt example using the XCsiSs driver.

This function will set up the system with interrupts handlers.

Parameters

DeviceId

is the unique device ID of the MIPI CSI Rx Subsystem core.

Returns

• XST_FAILURE if the system setup failed.
• XST_SUCCESS should never return since this function, if setup was successful, is blocking.

Note

If system setup was successful, this function is blocking in order to illustrate interrupt handling.

References XCsiSs_Config::BaseAddr, CsiSs_CciInit(), CsiSs_PlatformInit(), CsiSs_SetupIntrSystem(), Delay(), XCsiSs_Activate(), XCsiSs_CfgInitialize(), XCsiSs_Configure(), XCsiSs_LookupConfig(), XCsiSs_ReportCoreInfo(), and XCsiSs_Reset().

Referenced by main().

void CsiSs_PktLvlEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a Packet level error event is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for Packet level error event.

Referenced by CsiSs_SetupIntrSystem().

u32 CsiSs_PlatformInit

(

void

)

This function initialize required platform-specifc peripherals.

Parameters

None.

Returns

• XST_SUCCESS if required peripherals are initialized and configured successfully.
• XST_FAILURE, otherwise.

Note

None.

Referenced by CsiSs_IntrExample().

void CsiSs_ProtLvlEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a Protocol decoding level error event is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for Protocol Decoding level error

Referenced by CsiSs_SetupIntrSystem().

u32 CsiSs_SetupIntrSystem

(

void

)

This function sets up the interrupt system so interrupts can occur for the MIPI CSI Rx Subsystem core.

The function is application-specific since the actual system may or may not have an interrupt controller. The MIPI CSI Subsystem core could be directly connected to a processor without an interrupt controller. The user should modify this function to fit the application.

Parameters

None

Returns

• XST_SUCCESS if interrupt setup was successful.
• A specific error code defined in "xstatus.h" if an error occurs.

Note

None.

References CsiSs_CciSetupIntrSystem(), CsiSs_DphyEventHandler(), CsiSs_ErrEventHandler(), CsiSs_FrameRcvdEventHandler(), CsiSs_PktLvlEventHandler(), CsiSs_ProtLvlEventHandler(), CsiSs_SPktEventHandler(), XCsiSs_IntrHandler(), and XCsiSs_SetCallBack().

Referenced by CsiSs_IntrExample().

void CsiSs_SPktEventHandler	(	void *	InstancePtr,
		u32	Mask
	)

This function is called when a Short Packet FIFO event is received by the MIPI CSI Rx Subsystem core.

Parameters

InstancePtr	is a pointer to the XCsiSs instance.
Mask	of interrupt which caused this event

Returns

None.

Note

Use the XCsiSs_SetCallback driver function to set this function as the handler for Short Packet FIFO error event.

References XCsiSs::SpktData, and XCsiSs_GetShortPacket().

Referenced by CsiSs_SetupIntrSystem().

void Delay

(

u32

Seconds

)

For Microblaze we use an assembly loop that is roughly the same regardless of optimization level, although caches and memory access time can make the delay vary.

Just keep in mind that after resetting or updating the PHY modes, the PHY typically needs time to recover.

Parameters

Number

of seconds to sleep

Returns

None

Note

None

Referenced by CsiSs_IntrExample().

int main

(

void

)

This is the main function for XCsiSs interrupt example.

If the CsiSs_IntrExample function which sets up the system succeeds, this function will wait for the interrupts. Once a connection event or pulse is detected, CsiSs will RX device capabilities and re-start the subsystem.

Parameters

None.

Returns

• XST_FAILURE if the interrupt example was unsuccessful.

Note

Unless setup failed, main will never return since CsiSs_IntrExample is blocking (it is waiting on interrupts for Hot-Plug-Detect (HPD) events.

References CsiSs_IntrExample().