Overview

This file contains a design example using the XCsuDma driver in interrupt mode.

It sends data and expects to receive the same data through the device using the local loop back mode.

Note: The example contains an infinite loop such that if interrupts are not working it may hang.

MODIFICATION HISTORY:

Ver   Who     Date     Changes


1.0   vnsld  22/10/14 First release
1.2   adk    11/22/17 Added peripheral test app support.
1.2     adk    11/01/18 Declared static array rather than hard code memory for
                buffers.
      adk    18/01/18 Remove unnecessary column in XIntc_Connect() API.

Macros
#define	INTG_CSUDMA_INTR_DEVICE_ID XPAR_XCSUDMA_INTR
	Interrupt device ID of CSU DMA device ID. More...

#define	CSU_SSS_CONFIG_OFFSET 0x008
	CSU SSS_CFG Offset. More...

#define	CSUDMA_LOOPBACK_CFG 0x00000050
	LOOP BACK configuration macro. More...

#define	SIZE 0x100
	Size of the data to be transfered. More...

Functions
u32 DstBuf [SIZE]	__attribute__ ((aligned(64)))
	Destination buffer. More...

int	XCsuDma_IntrExample (INTC IntcInstancePtr, XCsuDma CsuDmaInstance, u16 DeviceId, u16 IntrId)
	This function performs data transfer in loop back mode in interrupt mode and verify the data. More...

void	IntrHandler (void *CallBackRef)
	This function is the interrupt handler for the CSU_DMA driver. More...

int	main (void)
	Main function to call the example. More...

Variables
XCsuDma	CsuDma
	Instance of the Csu_Dma Device. More...

Macro Definition Documentation

◆ CSU_SSS_CONFIG_OFFSET

#define CSU_SSS_CONFIG_OFFSET 0x008

CSU SSS_CFG Offset.

◆ CSUDMA_LOOPBACK_CFG

#define CSUDMA_LOOPBACK_CFG 0x00000050

LOOP BACK configuration macro.

◆ INTG_CSUDMA_INTR_DEVICE_ID

#define INTG_CSUDMA_INTR_DEVICE_ID XPAR_XCSUDMA_INTR

Interrupt device ID of CSU DMA device ID.

◆ SIZE

#define SIZE 0x100

Size of the data to be transfered.

Function Documentation

◆ attribute()

u32 DstBuf [SIZE] __attribute__ ( (aligned(64)) )

Destination buffer.

Source buffer.

◆ IntrHandler()

void IntrHandler ( void * CallBackRef )

This function is the interrupt handler for the CSU_DMA driver.

This handler reads the interrupt status from the Status register, determines the source of the interrupts, calls according callbacks, and finally clears the interrupts.

Parameters

CallBackRef is the callback reference passed from the interrupt handler, which in our case is a pointer to the driver instance.

Returns: None.

Note: None.

◆ main()

int main ( void )

Main function to call the example.

Returns

XST_SUCCESS if successful.
XST_FAILURE if failed.

Note: None.

◆ XCsuDma_IntrExample()

int XCsuDma_IntrExample	(	INTC *	IntcInstancePtr,
		XCsuDma *	CsuDmaInstance,
		u16	DeviceId,
		u16	IntrId
	)

This function performs data transfer in loop back mode in interrupt mode and verify the data.

Parameters

DeviceId is the XPAR_<CSUDMA Instance>_DEVICE_ID value from xparameters.h.

Returns

XST_SUCCESS if successful.
XST_FAILURE if failed.

Note: None.

Variable Documentation

◆ CsuDma

XCsuDma CsuDma

Instance of the Csu_Dma Device.