axicdma
Xilinx Vitis Drivers API Documentation
xaxicdma_example_hybrid_intr.c File Reference

Overview

This file demonstrates how to use xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in hybrid transfer mode through interrupt.

This example does one simple transfer, then a multiple BD transfer, and finally another simple transfer.

Modify NUMBER_OF_BDS_TO_TRANSFER for a different number of BDs to be transferred in the SG transfer.

This example assumes that the system has an interrupt controller.

To see the debug print, you need a Uart16550 or uartlite in your system, and please set "-DDEBUG" in your compiler options for the example, also comment out the "#undef DEBUG" in xdebug.h. You need to rebuild your software executable.

Make sure that MEMORY_BASE is defined properly as per the HW system and the transfer length should be cache-line size aligned.

MODIFICATION HISTORY:
Ver   Who  Date     Changes


1.00a jz 07/30/10 First release 2.01a rkv 02/01/11 Changed function prototype of XAxiCdma_HybridIntrExample to a function taking arguments interrupt instance,device instance,device id,device interrupt id Added interrupt support for Cortex A9 2.01a srt 03/06/12 Modified interrupt support for Zynq. Added V7 DDR Base Address to fix CR 649405. Modified Flushing and Invalidation of Caches to fix CRs 648103, 648701. 2.02a srt 03/01/13 Updated DDR base address for IPI designs (CR 703656). 4.1 adk 01/07/16 Updated DDR base address for Ultrascale (CR 799532) and removed the defines for S6/V6. 4.3 ms 01/22/17 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. ms 04/05/17 Modified Comment lines in functions to recognize it as documentation block for doxygen generation of examples. 4.4 rsp 02/22/18 Support data buffers above 4GB.Use UINTPTR for storing and typecasting buffer address(CR-995116). 4.8 sk 06/15/20 Fix the compilation error for xreg_cortexa9.h preprocessor. 4.8 sk 09/30/20 Modify the buffer length and add cache operations for receive and destination buffers to fix the data check failure and to make the length cache-line aligned.

Functions

int XAxiCdma_HybridIntrExample (XScuGic *IntcInstancePtr, XAxiCdma *InstancePtr, u16 DeviceId, u32 IntrId)
 The example to do hybrid transfers through interrupt. More...
 
int main (void)
 The entry point for this example. More...
 

Function Documentation

int main ( void  )

The entry point for this example.

It sets up uart16550 if one is available, invokes the example function, and reports the execution status.

Parameters
None
Returns
  • XST_SUCCESS if example finishes successfully
  • XST_FAILURE if example fails.
Note
None

References XAxiCdma_HybridIntrExample().

int XAxiCdma_HybridIntrExample ( XScuGic *  IntcInstancePtr,
XAxiCdma *  InstancePtr,
u16  DeviceId,
u32  IntrId 
)

The example to do hybrid transfers through interrupt.

It does the following transfers: a simple transfer a multiple BD scatter gather transfer another simple transfer

Parameters
IntcInstancePtris a pointer to the INTC instance
InstancePtris a pointer to the XAxiCdma instance
DeviceIdis the Device Id of the XAxiCdma instance
IntrIdis the interrupt Id for the XAxiCdma instance in build
Returns
  • XST_SUCCESS if example finishes successfully
  • XST_FAILURE if error occurs
Note
If the hardware build has problems with interrupt, then this function hangs

References XAxiCdma_CfgInitialize(), XAxiCdma_IntrEnable(), XAxiCdma_LookupConfig(), and XAXICDMA_XR_IRQ_ALL_MASK.

Referenced by main().