canps: xcanps_intr_example.c File Reference

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xcanps_intr_example.c File Reference

## Overview

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

This example shows the usage of the driver/device in interrupt 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 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

    1.00a xd/sv  01/12/10 First release
    2.1 adk                 23/08/14 Fixed CR:798792 Peripheral test for CANPS IP in
                                             SDK claims a 40kbps baud rate but it's not.
    3.1   mus    01/14/16 Added support for intc interrupt controller

## Functions
int | CanPsIntrExample (INTC *IntcInstPtr, XCanPs *CanInstPtr, u16 CanDeviceId, u16 CanIntrId)
| The main entry point for showing the XCanPs driver in interrupt mode. More...
int | main ()
| This function is the main function of the Can interrupt example. More...

## Function Documentation

int CanPsIntrExample | ( | INTC * | IntcInstPtr,
|  | XCanPs * | CanInstPtr,
|  | u16 | CanDeviceId,
|  | u16 | CanIntrId
| ) |  |

The main entry point for showing the XCanPs driver in interrupt mode.

The example configures the device for internal loop back mode, then sends a CAN frame and receives the same CAN frame.

Parameters

  IntcInstPtr | is a pointer to the instance of the INTC driver.
  CanInstPtr | is a pointer to the instance of the CAN driver which is going to be connected to the interrupt controller.
  CanDeviceId | is the device Id of the CAN device and is typically XPAR_<CANPS_instance>_DEVICE_ID value from xparameters.h.
  CanIntrId | is the interrupt Id and is typically XPAR_<CANPS_instance>_INTR value from xparameters.h.

Returns
  XST_SUCCESS if successful, otherwise driver-specific error code.

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

References XCanPs_Config::BaseAddr, XCanPs_EnterMode(), XCanPs_GetMode(), XCANPS_HANDLER_ERROR, XCANPS_HANDLER_EVENT, XCANPS_HANDLER_RECV, XCANPS_HANDLER_SEND, XCanPs_IntrEnable(), XCanPs_LookupConfig(), XCANPS_MODE_LOOPBACK, XCanPs_SelfTest(), and XCanPs_SetHandler().

Referenced by main().

int main | ( |  | ) |

This function is the main function of the Can interrupt example.

Parameters

  None. |

Returns
  - XST_SUCCESS if the example has completed successfully.
  - XST_FAILURE if the example has failed.

Note
  None.

References CanPsIntrExample().