标签:Abstraction Register jelly Candy bean command flavor reg register
This post will explain how to use the UVM Register Abstraction Layer (RAL) to generate register transactions. The figure below shows the verification platform used for this post. Among other things, the jelly_bean_reg_block, the jelly_bean_reg_adapter, and the jelly_bean_reg_predictor are the classes used for the register abstraction.
The figure below shows the diagram of the RAL-related classes. The standard UVM classes are shown in pink, while the jelly-bean classes are shown in light blue. The diagram looks busy, but bear in mind that I will explain each jelly-bean class one by one.
Register Definitions
In the previous posts, the DUT had no accessible registers. We are going to add the registers that hold jelly-bean recipe information and its taste. We will also add a command input port to the DUT so that we can write a jelly-bean recipe to the register and read its taste. The figure below shows the register definition of the DUT.
The source code of the DUT (jelly_bean_taster) is shown below. When the command input is WRITE, the values of flavor, color, sugar_free, and sour input ports are written to the RECIPE register (line 22 to 25). When the command input is READ, the TASTE register is read out and the taste output is driven accordingly (line 27).
module jelly_bean_taster( jelly_bean_if.slave_mp jb_slave_if );
import jelly_bean_pkg::*;
reg [2:0] flavor;
reg [1:0] color;
reg sugar_free;
reg sour;
reg [1:0] command;
reg [1:0] taste;
initial begin
flavor = 0;
color = 0;
sugar_free = 0;
sour = 0;
command = 0;
taste = 0;
end
always @ ( posedge jb_slave_if.clk ) begin
if ( jb_slave_if.command == jelly_bean_types::WRITE ) begin
flavor < = jb_slave_if.flavor; color <= jb_slave_if.color; sugar_free <= jb_slave_if.sugar_free; sour <= jb_slave_if.sour; end else if ( jb_slave_if.command == jelly_bean_types::READ ) begin
jb_slave_if.taste <= taste; end
end
always @ ( posedge jb_slave_if.clk ) begin
if ( jb_slave_if.flavor == jelly_bean_types::CHOCOLATE &&
jb_slave_if.sour ) begin
taste <= jelly_bean_types::YUCKY;
end else if ( jb_slave_if.flavor != jelly_bean_types::NO_FLAVOR ) begin
taste <= jelly_bean_types::YUMMY;
end
end
endmodule: jelly_bean_taster
标签:Abstraction,Register,jelly,Candy,bean,command,flavor,reg,register 来源: https://blog.csdn.net/zt5169/article/details/110421076
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。