BRAM Standalone driver

Introduction

This page gives an overview of bram (block ram comtroller) driver which is available as part of the Xilinx Vivado and SDK distribution.

Source path for the driver:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/bram

Driver source code is organized into different folders. Below diagram shows the bram driver source organization

bram
|
-- Doc - Provides the API and data structure details
|
- Examples - Reference application to show how to use the driver APIs and calling sequence
|
- Source - Driver source files

Features Supported

Controller/Driver features supported

The Xilinx BRAM controller is a soft IP core designed for Xilinx FPGAs and contains the following general features,

LMB v2.0 bus interfaces with byte enable support
Separate read and write channel interfaces to utilize dual port FPGA BRAM technology
Supports memory sizes up to a maximum of 2 MBytes
Compatible with Xilinx AXI Interconnect
Used in conjunction with bram_block peripheral to provide fast BRAM memory solution for MicroBlaze ILMB and DLMB ports
Supports byte, half-word, and word transfers
Supports optional BRAM error correction and detection

Known issues and Limitations

None

Test cases

BRAM selftest example

https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/bram/examples/xbram_example.c
This example initializes ECC for BRAM and executes the selftest.
Output

Successfully ran Bram Example

BRAM interrupt example

https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/bram/examples/xbram_intr_example.c
This example configures interrupt for BRAM controller and evaluates triggering of interrupt through fault injection
Output

Successfully ran Bram Interrupt Example

Changelog

2020.2

bram: Modify Makefile to support parallel make execution
Makefile: Remove realpath command

2020.1

Fixed the warnings reported by ARMCC compiler

2019.2

No changes

2017.4

No Changes

2017.3

Updated bram.tcl to add U suffix for all the macros exported into xparameters.h
Fixed compilation warnings in the driver