xcanfd_polled_example.c File Reference

Overview

Contains an example of how to use the XCan driver directly.

The example here shows using the driver/device in polled mode.

Note

The Baud Rate Prescaler Register (BRPR) and Bit Timing Register (BTR) are setup such that CAN baud rate equals 40Kbps, assuming that the the CAN clock frequency is 24MHz. The user needs to modify these values based on the desired baud rate and the CAN clock frequency. For more information see the CAN 2.0A, CAN 2.0B, ISO 11898-1 specifications.

MODIFICATION HISTORY:

Ver   Who    Date       Changes



1.0   nsk    06/04/15 First release
1.2   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.
      ms     04/05/17 Added tabspace for return statements in functions
                      for proper documentation while generating doxygen.
1.3   ask    08/08/18 Changed the Can ID to 11 bit value as standard Can ID
                                        is 11 bit.
2.8   ht     06/19/23 Added support for system device-tree flow.
2.8   gm     06/22/23 Call XCanFd_stop to release canfd node.
2.10  ht     01/09/25 Fix C++ warning.
2.12  vlt    12/12/25 Update Doxygen comments to include SDT flow details.

#include "xparameters.h"
#include "xcanfd.h"
#include "xstatus.h"

Functions
int	XCanFdPolledExample (UINTPTR BaseAddress)
	The entry point for showing the XCan driver in polled mode. More...
int	main (void)
	Main function to call the example. More...

Function Documentation

int main

(

void

)

Main function to call the example.

This function is not included if the example is generated from the TestAppGen test tool.

Returns

• XST_SUCCESS if the example has completed successfully.
• XST_FAILURE if the example has failed.

Note

None

References XCanFdPolledExample().

int XCanFdPolledExample

(

UINTPTR

BaseAddress

)

The entry point for showing the XCan driver in polled mode.

The example configures the device for internal loopback mode, then sends a Can frame, receives the same Can frame, and verifies the frame contents.

Parameters

BaseAddress

contains the base address of the device

Returns

XST_SUCCESS if successful, otherwise driver-specific error code.

Note

- In XSCT/classic flow, DeviceId is used to look up the device configuration.

• If the device is not working correctly, this function may enter an infinite loop and will never return to the caller.

References XCanFd_Config::BaseAddress, TEST_BRPR_BAUD_PRESCALAR, TEST_BTR_FIRST_TIMESEGMENT, TEST_BTR_SECOND_TIMESEGMENT, TEST_BTR_SYNCJUMPWIDTH, TEST_FBRPR_BAUD_PRESCALAR, TEST_FBTR_FIRST_TIMESEGMENT, TEST_FBTR_SECOND_TIMESEGMENT, TEST_FBTR_SYNCJUMPWIDTH, TEST_MESSAGE_ID, XCanFd_AcceptFilterDisable(), XCanFd_AcceptFilterEnable(), XCANFD_AFR_UAF_ALL_MASK, XCanFd_CfgInitialize(), XCanFd_CreateIdValue, XCanFd_EnterMode(), XCANFD_GET_RX_MODE, XCanFd_Get_RxBuffers, XCanFd_GetMode(), XCanFd_LookupConfig(), XCANFD_MODE_CONFIG, XCANFD_MODE_LOOPBACK, XCanFd_RxBuff_MailBox_Active(), XCanFd_RxBuff_MailBox_DeActive(), XCanFd_SelfTest(), XCanFd_Set_MailBox_IdMask(), XCanFd_SetBaudRatePrescaler(), XCanFd_SetBitRateSwitch_DisableNominal(), XCanFd_SetBitTiming(), XCanFd_SetFBaudRatePrescaler(), XCanFd_SetFBitTiming(), and XCanFd_stop().

Referenced by main().