Introduction
This page gives an overview of can driver which is available as part of the Xilinx Vivado and SDK distribution.
For more information, please refer CAN_Doc the official documentation and resource utilization.
Driver Sources
The source code for the driver is included with the Vitis Unified Software Platform installation, as well as being available in the Xilinx Github repository.
Driver name | Path in vitis | path in Git Hub |
|---|---|---|
can | <Vitis Install Directory>/data/embedded/XilinxProcessorIPLib/drivers/can | https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/can/ |
Note: To view the sources for a particular release, use the rel-version tag in github. For example, for the 2020.1 release, the proper version of the code is: https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/can/
The driver source code is organized into different folders. The table below shows the CAN driver source organization.
Directory | Description |
|---|---|
src | Driver source files |
examples | Example applications that show how to use the driver features |
doc | Provides the API and data structure details |
data | Driver .tcl and .mdd file |
Driver Implementation
For a full list of features supported by this IP, please refer CAN_Doc
Features
Controller Features:
Industrial (I, –40 to +100°C junction temperature) and automotive/defense Q-Grade (Q, –40 to +125°C junction temperature) device support.
Supports both standard (11-bit identifier) and extended (29-bit identifier) frames
Supports bit rates up to 1 Mb/s • Transmit message FIFO with a user-configurable depth of up to 64 messages
Transmit prioritization through one high-priority transmit buffer
Automatic re-transmission on errors or arbitration loss • Receive message FIFO with a user-configurable depth of up to 64 messages
Acceptance filtering (through a user-configurable number) of up to four acceptance filters
Sleep mode with automatic wake up
Loopback mode for diagnostic applications
Maskable error and status interrupts
Readable error counters
Driver Supported Features
The CAN Standalone driver support the below things.
All controller features supported.
Known Issues and Limitations
None.
Example Applications
Refer to the driver examples directory for various example applications that exercise the different features of the driver. Each application is linked in the table below. The following sections describe the usage and expected output of the various applications. These example applications can be imported into the Vitis IDE from the Board Support Package settings tab.
Links to Examples
Examples Path:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/can/examples
Test Name | Example Source | Description |
|---|---|---|
Polled | xcan_polled_example.c | It configures the CAN controller in loop back mode with no interrupt enabled and verifies the data received with data sent. |
Interrupt | xcan_intr_example.c | It configures the CAN controller in loop back mode with interrupts enabled and verifies the data received with data sent. |
Example Application Usage
CAN examples
Expected Output
xcan_polled_example.c
It configures the CAN controller in loop back mode with no interrupt enabled and verifies the data received with data sent.
xcan_intr_example.c
It configures the CAN controller in loop back mode with interrupts enabled and verifies the data received with data sent.
Successfully ran Can polled Example Successfully ran Can Interrupt Example |
Known Issues and Limitations
None
Change Log
2021.1
https://github.com/Xilinx/embeddedsw/blob/xilinx_v2021.1/doc/ChangeLog#L459
2021.1
https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2021.1/doc/ChangeLog#L411
2020.2
https://github.com/Xilinx/embeddedsw/blob/release-2020.2/doc/ChangeLog#L190
2020.1
https://github.com/Xilinx/embeddedsw/blob/release-2020.1/doc/ChangeLog#L425
2019.2
None
2019.1
None
2018.3
https://github.com/Xilinx/embeddedsw/blob/release-2018.3/doc/ChangeLog#L116