Vhdl 如何填写和显示矩阵?[硬件描述语言]
我有一个数据输入作为标准逻辑向量,我想用数据输入的位填充一个矩阵,然后显示它 如何填写和显示矩阵 这是我的密码:Vhdl 如何填写和显示矩阵?[硬件描述语言],vhdl,xilinx,Vhdl,Xilinx,我有一个数据输入作为标准逻辑向量,我想用数据输入的位填充一个矩阵,然后显示它 如何填写和显示矩阵 这是我的密码: signal datain : std_logic_vector(39 downto 0) := "1111011101100110011001010110011001100110"; for i1 in 1 to 5 loop for j1 in 1 to 8 loop for j2 in datain'range loop ma
signal datain : std_logic_vector(39 downto 0) := "1111011101100110011001010110011001100110";
for i1 in 1 to 5 loop
for j1 in 1 to 8 loop
for j2 in datain'range loop
mat1(i1,j1)<=datain(j2);
end loop;
end loop;
end loop;
------- display the matrix
for i2 in 1 to 5 loop
for i3 in 1 to 8 loop
for i4 in dataout'range loop
dataout(i4) <= mat1(i2,i3);
end loop;
end loop;
end loop;
信号数据输入:标准逻辑向量(39向下至0):=“1111011101100101011001001011011011011011011011011011011010”;
对于1到5环路中的i1
对于1至8回路中的j1
对于datain'范围循环中的j2
mat1(i1,j1)首先,我们从您的代码片段构造一个:
library ieee;
use ieee.std_logic_1164.all;
entity abir is
end entity;
architecture foo of abir is
type mat_type is array (1 to 5, 1 to 8) of std_logic;
signal mat1: mat_type;
signal datain : std_logic_vector(39 downto 0) :=
"1111011101100110011001010110011001100110";
signal dataout: std_logic_vector (39 downto 0); -- MISSING
-- this function is predefined in VHDL -2008:
function to_string (inp: std_logic_vector) return string is
variable image_str: string (1 to inp'length);
alias input_str: std_logic_vector (1 to inp'length) is inp;
begin
for i in input_str'range loop
image_str(i) := character'VALUE(std_ulogic'IMAGE(input_str(i)));
end loop;
return image_str;
end function;
begin
INITIALIZE_MATRIX:
process -- (datain)
begin
for i1 in 1 to 5 loop
for j1 in 1 to 8 loop
for j2 in datain'range loop
mat1(i1,j1)<=datain(j2);
end loop;
end loop;
end loop;
wait; -- Do only once, depends on the initial value of datain
end process; -- the wait statement can be removed if you add sensitivity
------- display the matrix
MATRIX_T0_DATAOUT:
process (mat1)
begin
for i2 in 1 to 5 loop
for i3 in 1 to 8 loop
for i4 in dataout'range loop
dataout(i4) <= mat1(i2,i3);
end loop;
end loop;
end loop;
end process;
DISPLAY_DATAOUT:
process -- (dataout)
begin -- wait statements so only disply valid datout
wait for 0 ns; -- first delta cycle all 'U's (dataout uninitialized)
wait for 0 ns; -- second delta cycle all 'U's (mat1 uninitialized)
report LF &
HT & "datain = " & to_string(datain) & LF &
HT & "dataout = " & to_string(dataout);
wait on dataout;
end process;
end architecture;
因此,嵌套循环有问题(您也可以使用波形查看器验证这一点,以确定mat1实际上都是“0”)
这是因为内部的循环。使用datain,将矩阵mat1(i,j)的每个元素赋值N次,其中N是datain的长度(范围为j2)。使用dataout,可以为dataout(i4)的每个索引元素分配mat(i2,i3)的每个矩阵元素
那么有可能让三个循环执行这些赋值吗
嗯,没有
在初始化矩阵过程中,mat1的每个(i,j)位置都被datain的所有索引值覆盖。只有最后一个生效了。这使矩阵中充满了所有“0”
在矩阵_到_数据输出过程中,所有数据输出索引都被“安排”为每个i3循环迭代的最后一个mat1(i2,i3)值,以i2和i3的最后一个循环迭代值为“0”为基础
我们可以修改这两组循环,将j2或i4作为变量直接递减(datain和dataout的范围按降序排列):
在这里我们可以找到dataout和datain匹配。(一件好事。)
所以问题是每个进程中的三个嵌套循环都不正确。我们希望分别管理指向输入和输出数组的指针
我们还管理变量j2或i4的赋值,以防止边界冲突,使用if语句防止变量赋值超出变量的值范围时j2或i4被递减。分配边界检查失败将中止模拟
请注意,信号分配会导致将值写入投影输出波形(队列)。在任何挂起的进程运行并挂起之前,不会发生信号更新。在投影输出波形中,任何时间只有一个值。(包括当前模拟时间)
这两个经过修改的过程可用作转换函数的基础:
architecture fum of abir is
type mat_type is array (1 to 5, 1 to 8) of std_logic;
signal mat1: mat_type;
signal datain : std_logic_vector(39 downto 0) :=
"1111011101100110011001010110011001100110";
signal dataout: std_logic_vector (39 downto 0); -- MISSING
-- this function is predefined in VHDL -2008:
function to_string (inp: std_logic_vector) return string is
variable image_str: string (1 to inp'length);
alias input_str: std_logic_vector (1 to inp'length) is inp;
begin
for i in input_str'range loop
image_str(i) := character'VALUE(std_ulogic'IMAGE(input_str(i)));
end loop;
return image_str;
end function;
function to_matrix (inp: std_logic_vector) return mat_type is
alias input: std_logic_vector(0 to inp'length - 1) is inp; -- ascending
variable mat: mat_type;
variable inptr: natural range 0 to inp'length;
begin
assert input'length = mat'length(1) * mat'length(2)
report LF &
"to_matrix call, input length (" &
integer'image(inp'length) & ") " &
"/= " & integer'image( mat'length(1) * mat'length(2))
severity FAILURE;
for i in mat'range(1) loop -- first dimension
for j in mat'range(2) loop -- second dimension
mat(i,j) := input(inptr);
inptr := inptr + 1; -- inptr range allows last increment
end loop;
end loop;
return mat;
end function;
function to_std_logic_vector (mat: mat_type) return std_logic_vector is
variable retval:
std_logic_vector(0 to mat'length(1) * mat'length(2) - 1);
variable outptr: natural range 0 to retval'length;
begin
for i in mat'range(1) loop -- first dimension
for j in mat'range(2) loop -- second dimension
retval(outptr) := mat(i,j);
outptr := outptr + 1; -- outptr range allows last increment
end loop;
end loop;
return retval;
end function;
begin
INITIALIZE_MATRIX:
mat1 <= to_matrix(datain);
MATRIX_T0_DATAOUT:
dataout <= to_std_logic_vector(mat1);
DISPLAY_DATAOUT:
process -- (dataout)
begin -- wait statements so only disply valid datout
wait for 0 ns; -- first delta cycle all 'U's (dataout uninitialized)
wait for 0 ns; -- second delta cycle all 'U's (mat1 uninitialized)
report LF &
HT & "datain = " & to_string(datain) & LF &
HT & "dataout = " & to_string(dataout);
wait for 1 ns;
wait on dataout;
end process;
end architecture;
abir的架构框架是
类型mat_类型是标准_逻辑的数组(1到5,1到8);
信号mat1:mat_型;
信号数据输入:标准逻辑向量(39向下至0):=
"1111011101100110011001010110011001100110";
信号数据输出:标准逻辑向量(39向下至0);--丢失的
--此函数在VHDL-2008中预定义:
函数到_字符串(inp:std_逻辑_向量)的返回字符串为
变量image_str:字符串(1到inp'长度);
别名输入\u str:std\u逻辑\u向量(1到inp'长度)是inp;
开始
对于输入_str'range循环中的i
图像(i):=字符值(标准逻辑)图像(输入(i));
端环;
返回图像;
末端功能;
函数到矩阵(inp:std逻辑向量)的返回矩阵类型为
别名输入:标准逻辑向量(0到inp'长度-1)是inp;--提升
可变材料:材料类型;
变量inptr:自然范围0到inp'长度;
开始
断言输入长度=材料长度(1)*材料长度(2)
报告LF&
“到矩阵调用,输入长度(”&
整数‘图像(inp’长度)&“&
“/=”&整数图像(材质长度(1)*材质长度(2))
严重故障;
对于mat'range(1)循环中的i——第一维
对于mat'range(2)循环中的j——第二维
mat(i,j):=输入(inptr);
inptr:=inptr+1;——inptr范围允许最后一次增量
端环;
端环;
返回垫;
末端功能;
返回标准逻辑向量的函数(mat:mat类型)
变量返回:
标准逻辑向量(0到材料长度(1)*材料长度(2)-1);
可变输出:自然范围0到返回长度;
开始
对于mat'range(1)循环中的i——第一维
对于mat'range(2)循环中的j——第二维
retval(outptr):=mat(i,j);
outptr:=outptr+1;--输出范围允许最后一次增量
端环;
端环;
返回返回;
末端功能;
开始
初始化矩阵:
mat1首先,我们从您的代码片段构造一个:
library ieee;
use ieee.std_logic_1164.all;
entity abir is
end entity;
architecture foo of abir is
type mat_type is array (1 to 5, 1 to 8) of std_logic;
signal mat1: mat_type;
signal datain : std_logic_vector(39 downto 0) :=
"1111011101100110011001010110011001100110";
signal dataout: std_logic_vector (39 downto 0); -- MISSING
-- this function is predefined in VHDL -2008:
function to_string (inp: std_logic_vector) return string is
variable image_str: string (1 to inp'length);
alias input_str: std_logic_vector (1 to inp'length) is inp;
begin
for i in input_str'range loop
image_str(i) := character'VALUE(std_ulogic'IMAGE(input_str(i)));
end loop;
return image_str;
end function;
begin
INITIALIZE_MATRIX:
process -- (datain)
begin
for i1 in 1 to 5 loop
for j1 in 1 to 8 loop
for j2 in datain'range loop
mat1(i1,j1)<=datain(j2);
end loop;
end loop;
end loop;
wait; -- Do only once, depends on the initial value of datain
end process; -- the wait statement can be removed if you add sensitivity
------- display the matrix
MATRIX_T0_DATAOUT:
process (mat1)
begin
for i2 in 1 to 5 loop
for i3 in 1 to 8 loop
for i4 in dataout'range loop
dataout(i4) <= mat1(i2,i3);
end loop;
end loop;
end loop;
end process;
DISPLAY_DATAOUT:
process -- (dataout)
begin -- wait statements so only disply valid datout
wait for 0 ns; -- first delta cycle all 'U's (dataout uninitialized)
wait for 0 ns; -- second delta cycle all 'U's (mat1 uninitialized)
report LF &
HT & "datain = " & to_string(datain) & LF &
HT & "dataout = " & to_string(dataout);
wait on dataout;
end process;
end architecture;
因此,嵌套循环有问题(您也可以使用波形查看器验证这一点,以确定mat1实际上都是“0”)
这是因为内部的循环。使用datain,将矩阵mat1(i,j)的每个元素赋值N次,其中N是datain的长度(范围为j2)。使用dataout,可以为dataout(i4)的每个索引元素分配mat(i2,i3)的每个矩阵元素
那么有可能让三个循环执行这些赋值吗
嗯,没有
在初始化矩阵过程中,mat1的每个(i,j)位置都被datain的所有索引值覆盖。只有最后一个生效了。这使矩阵中充满了所有“0”
在矩阵_到_数据输出过程中,所有数据输出索引都被“安排”为每个i3循环迭代的最后一个mat1(i2,i3)值,以i2和i3的最后一个循环迭代值为“0”为基础
我们可以修改这两组循环,将j2或i4作为变量直接递减(datain和dataout的范围按降序排列):
在这里我们可以找到dataout和datain匹配。(一件好事。)
所以问题是每个进程中的三个嵌套循环都不正确。我们希望分别管理指向输入和输出数组的指针
我们还使用if语句管理变量j2或i4的赋值,以防止边界冲突
abir.vhdl:68:9:@0ms:(report note):
datain = 1111011101100110011001010110011001100110
dataout = 1111011101100110011001010110011001100110
architecture fum of abir is
type mat_type is array (1 to 5, 1 to 8) of std_logic;
signal mat1: mat_type;
signal datain : std_logic_vector(39 downto 0) :=
"1111011101100110011001010110011001100110";
signal dataout: std_logic_vector (39 downto 0); -- MISSING
-- this function is predefined in VHDL -2008:
function to_string (inp: std_logic_vector) return string is
variable image_str: string (1 to inp'length);
alias input_str: std_logic_vector (1 to inp'length) is inp;
begin
for i in input_str'range loop
image_str(i) := character'VALUE(std_ulogic'IMAGE(input_str(i)));
end loop;
return image_str;
end function;
function to_matrix (inp: std_logic_vector) return mat_type is
alias input: std_logic_vector(0 to inp'length - 1) is inp; -- ascending
variable mat: mat_type;
variable inptr: natural range 0 to inp'length;
begin
assert input'length = mat'length(1) * mat'length(2)
report LF &
"to_matrix call, input length (" &
integer'image(inp'length) & ") " &
"/= " & integer'image( mat'length(1) * mat'length(2))
severity FAILURE;
for i in mat'range(1) loop -- first dimension
for j in mat'range(2) loop -- second dimension
mat(i,j) := input(inptr);
inptr := inptr + 1; -- inptr range allows last increment
end loop;
end loop;
return mat;
end function;
function to_std_logic_vector (mat: mat_type) return std_logic_vector is
variable retval:
std_logic_vector(0 to mat'length(1) * mat'length(2) - 1);
variable outptr: natural range 0 to retval'length;
begin
for i in mat'range(1) loop -- first dimension
for j in mat'range(2) loop -- second dimension
retval(outptr) := mat(i,j);
outptr := outptr + 1; -- outptr range allows last increment
end loop;
end loop;
return retval;
end function;
begin
INITIALIZE_MATRIX:
mat1 <= to_matrix(datain);
MATRIX_T0_DATAOUT:
dataout <= to_std_logic_vector(mat1);
DISPLAY_DATAOUT:
process -- (dataout)
begin -- wait statements so only disply valid datout
wait for 0 ns; -- first delta cycle all 'U's (dataout uninitialized)
wait for 0 ns; -- second delta cycle all 'U's (mat1 uninitialized)
report LF &
HT & "datain = " & to_string(datain) & LF &
HT & "dataout = " & to_string(dataout);
wait for 1 ns;
wait on dataout;
end process;
end architecture;