[英]how to use verilog PLI communicate with c by ncverilog compiler
I would like to communicate c with verilog. 我想用verilog与c沟通。 I find the Verilog PLI can solve my problem. 我发现Verilog PLI可以解决我的问题。 I read this website to learn http://www.asic-world.com/verilog/pli1.html#How_it_Works . 我阅读本网站了解http://www.asic-world.com/verilog/pli1.html#How_it_Works 。 But I still can't work even a printf function. 但我仍然无法工作甚至printf功能。 I use ncverilog for verilog compiler. 我使用ncverilog进行verilog编译。 What I done is blow. 我所做的就是打击。 I can't have a successful compile for this. 我无法成功编译。 It says that it can't find the function. 它说它无法找到功能。 Can anyone tell me how to solve my problem. 谁能告诉我如何解决我的问题。 thanks =) 谢谢=)
C code: hello.c C代码:hello.c
#include<stdio.h>
void hello(){
printf("HELLO");
}
make library: 制作图书馆:
gcc hello.c -fPIC -shared -o hello.so
verilog code: test.v verilog代码:test.v
module test();
initial begin
$hello;
#10 $finish;
end
endmodule
verilog command: verilog命令:
ncverilog test.v +access+r -v hello.so
VPI (PLI 2.0) VPI (PLI 2.0)
hello_vpi.c : hello_vpi.c:
#include<stdio.h>
#include <vpi_user.h>
void hello(){
printf("HELLO");
}
void register_hello()
{
s_vpi_systf_data data;
data.type = vpiSysTask; //vpiSysFunc;
// data.sysfunctype = vpiSysFuncInt; // return type if type is Func
data.tfname = "$hello";
data.calltf = hello;
data.compiletf = 0;
data.sizetf = 0;
data.user_data = 0;
vpi_register_systf(&data);
}
Commands: 命令:
gcc hello_vpi.c -fPIC -shared -o hello_vpi.so
ncverilog test.v +access+r -loadvpi ./hello_vpi.so:register_hello
PLI 1.0 requires all the C methods use in verilog to be defined in s_tfcell veriusertfs[]
. PLI 1.0要求在s_tfcell veriusertfs[]
定义verilog中使用的所有C方法。 Ncverilog requires an additional bootstrap method that returns a type p_tf_cell
, this method defines a static s_tfcell veriusertfs[]
. Ncverilog需要一个额外的bootstrap方法,它返回一个p_tf_cell
类型,这个方法定义了一个静态的s_tfcell veriusertfs[]
。 Here is an example: 这是一个例子:
veriuser_nc.c : veriuser_nc.c:
#include "veriuser.h"
#include "acc_user.h"
extern void hello();
#define user_task 1
#define user_function 2
p_tfcell my_boot() {
s_tfcell veriusertfs[] = {
/* {user_function/usertask, (int)data, pli_checkp, pli_sizep, pli, ?, verilog_name, ? } */
{usertask, 0, 0, 0, hello, 0, "$hello", 1},
{0} // last entry must be 0
};
return(veriusertfs);
}
Commands: 命令:
gcc hello.c veriuser_nc.c -fPIC -shared -o hello_pli.so
ncverilog test.v +access+r -loadpli1 ./hello_pli.so:my_boot
VCS requires a tab file instead of an bootstrap method. VCS需要选项卡文件而不是引导程序方法。 This is lightly covered here: http://www.asic-world.com/verilog/pli2.html#Linking_With_Simulator 这里有一点: http : //www.asic-world.com/verilog/pli2.html#Linking_With_Simulator
Another approach is to use SystemVerilog DPI which does not have a wrapper/translation layer in the same sense as PLI/VPI. 另一种方法是使用SystemVerilog DPI ,它没有与PLI / VPI相同的包装/转换层。
Add #include "svdpi.h"
to the head of hello.c. 将#include "svdpi.h"
添加到hello.c的头部。 I'm just changing the shared objects name to identify the library type (not required). 我只是更改共享对象名称以标识库类型(不是必需的)。 gcc hello.c -fPIC -shared -o hello_dpi.so
verilog code: test.sv verilog代码:test.sv
module test();
import "DPI-C" pure function void hello();
// DPI methods are treated as verilog task/function after import, including scope access
initial begin
hello(); // dpi doesn't have a $
#10 $finish;
end
endmodule
verilog command: verilog命令:
ncverilog -sv test.sv +access+r -sv_lib hello_dpi.so
Documentation on DPI is in the IEEE std 1800-2012 § 35. Direct programming interface. 有关DPI的文档在IEEE标准1800-2012§35 。直接编程接口。 PLI/VPI is covered in § 36 but does not cover simulator specif requirements. PLI / VPI在第36节中介绍,但不包括模拟器的特定要求。 For more description and tutorials about DPI, checkout http://en.wikipedia.org/wiki/SystemVerilog_DPI and http://www.doulos.com/knowhow/sysverilog/tutorial/dpi/ 有关DPI的更多说明和教程, 请访问 http://en.wikipedia.org/wiki/SystemVerilog_DPI和http://www.doulos.com/knowhow/sysverilog/tutorial/dpi/
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