VHDL合成错误。无法合成信号blk_指针，同步描述错误
我对代码的合成有问题。 显示的错误是“无法合成信号blk_指针，同步描述错误。当前软件版本不支持您用于描述同步元素（寄存器、内存等）的描述样式。” 我想保存两台设备之间的通信消息。具有下降沿和上升沿的部分用于查找消息的当前部分，并创建指向该部分的指针（msg_指针、blk_指针）。然后我想将当前值保存到缓冲区 当我删除最后一个部分（使用for循环的部分）时，它会起作用VHDL合成错误。无法合成信号blk_指针，同步描述错误,vhdl,fpga,xilinx-ise,Vhdl,Fpga,Xilinx Ise,我对代码的合成有问题。 显示的错误是“无法合成信号blk_指针，同步描述错误。当前软件版本不支持您用于描述同步元素（寄存器、内存等）的描述样式。” 我想保存两台设备之间的通信消息。具有下降沿和上升沿的部分用于查找消息的当前部分，并创建指向该部分的指针（msg_指针、blk_指针）。然后我想将当前值保存到缓冲区 当我删除最后一个部分（使用for循环的部分）时，它会起作用 过程（通信延迟） 变量msg_指针：整数范围0到20:=0--指向多个消息块 变量blk_指针：整数范围0到50:=0--指向当
过程（通信延迟）
变量msg_指针：整数范围0到20:=0--指向多个消息块
变量blk_指针：整数范围0到50:=0--指向当前块中的若干位
变量buf_指针：整数范围0到13:=0--指向输出S14T7C7_TEMP buf中的若干位
变量S14T7C7_TEMP:STD_LOGIC_VECTOR（13向下至0）：=“00000000000000”；
变量nzer：整数范围0到9:=0；
变量njed：整数范围0到9:=0；
变量拷贝：标准逻辑；
开始
如果下降沿（com延迟），则
如果com_级别时间>4500，则
msg_指针：=0；
blk_指针：=0；
buf_指针：=0；
elsif（com_水平时间<4500）和（com_水平时间>630）然后
msg_指针：=1；
blk_指针：=0；
buf_指针：=0；
如果blk_指针>=9，则
blk_指针：=0；
如果msg_指针最后一个循环与上升或下降com_延迟
clock edge无关，因此不是很好的同步设计风格。你最好的选择是修改它的这一方面。你也有写在两个时钟边缘的信号；通常也不太好。您使用哪种ISE版本和目标平台？尝试启用新的VHDL解析器：XST进程首选项->其他XST命令行选项=-使用_new_parser yes
。新的解析器支持更新的VHDL语法，可以将更多的描述形式转换为硬件。您也可以尝试使用elsif上升沿（…）
或使用if com\u delayed'事件，然后在每个时钟边缘触发。DDR触发器仅支持输入和输出（IDDR、ODDR、…-原语）。@BrianDrummond-最后一个循环非常重要，因为它是根据上升沿或下降沿部分读取的值初始化缓冲区中的更改。我还需要在两个边缘做出反应，因为我想将串行通信消息复制到std_logic_向量。@Paebells我已经尝试了使用“事件”、“elsif”等的所有组合：(
process(com_delayed)
variable msg_pointer : INTEGER range 0 to 20:=0; --pointing to a number of message block
variable blk_pointer : INTEGER range 0 to 50:=0; --pointing to a number of bit from the current block
variable buf_pointer : INTEGER range 0 to 13:=0; --pointing to a number of bit in the output S14T7C7_TEMP buf
variable S14T7C7_TEMP : STD_LOGIC_VECTOR (13 downto 0):="00000000000000";
variable nzer : INTEGER range 0 to 9:=0;
variable njed : INTEGER range 0 to 9:=0;
variable copy : STD_LOGIC;
begin
if falling_edge(com_delayed) then
if com_level_time > 4500 then
msg_pointer := 0;
blk_pointer := 0;
buf_pointer := 0;
elsif ( com_level_time < 4500 ) and ( com_level_time > 630 ) then
msg_pointer := 1;
blk_pointer := 0;
buf_pointer := 0;
elsif blk_pointer >= 9 then
blk_pointer:=0;
if msg_pointer<6 then
msg_pointer:=msg_pointer+1;
end if;
elsif com_level_time <= 80 then
blk_pointer:=blk_pointer+1;
njed:=1;
copy:='1';
elsif (com_level_time>80 and com_level_time<=142) then
blk_pointer:=blk_pointer+2;
njed:=2;
copy:='1';
elsif (com_level_time>142 and com_level_time<=200) then
blk_pointer:=blk_pointer+3;
njed:=3;
copy:='1';
elsif (com_level_time>200 and com_level_time<=274) then
blk_pointer:=blk_pointer+4;
njed:=4;
copy:='1';
elsif (com_level_time>274 and com_level_time<=336) then
blk_pointer:=blk_pointer+5;
njed:=5;
copy:='1';
elsif (com_level_time>336 and com_level_time<=396) then
blk_pointer:=blk_pointer+6;
njed:=6;
copy:='1';
elsif (com_level_time>396 and com_level_time<=460) then
blk_pointer:=blk_pointer+7;
njed:=7;
copy:='1';
elsif (com_level_time>460 and com_level_time<=526) then
blk_pointer:=blk_pointer+8;
njed:=8;
copy:='1';
elsif (com_level_time>526 and com_level_time<=630) then
blk_pointer:=blk_pointer+9;
njed:=9;
copy:='1';
end if;
end if;
if rising_edge(com_delayed) then
if com_level_time <= 80 then
blk_pointer:=blk_pointer+1;
nzer:=1;
copy:='1';
elsif (com_level_time>80 and com_level_time<=142) then
blk_pointer:=blk_pointer+2;
nzer:=2;
copy:='1';
elsif (com_level_time>142 and com_level_time<=200) then
blk_pointer:=blk_pointer+3;
nzer:=3;
copy:='1';
elsif (com_level_time>200 and com_level_time<=274) then
blk_pointer:=blk_pointer+4;
nzer:=4;
copy:='1';
elsif (com_level_time>274 and com_level_time<=336) then
blk_pointer:=blk_pointer+5;
nzer:=5;
copy:='1';
elsif (com_level_time>336 and com_level_time<=396) then
blk_pointer:=blk_pointer+6;
nzer:=6;
copy:='1';
elsif (com_level_time>396 and com_level_time<=460) then
blk_pointer:=blk_pointer+7;
nzer:=7;
copy:='1';
elsif (com_level_time>460 and com_level_time<=526) then
blk_pointer:=blk_pointer+8;
nzer:=8;
copy:='1';
elsif (com_level_time>526 and com_level_time<=630) then
blk_pointer:=blk_pointer+9;
nzer:=9;
copy:='1';
end if;
end if;
msg_pointer_ext:=msg_pointer;
blk_pointer_ext:=blk_pointer;
if copy='1' then
For it in 1 to 9 loop
if nzer/=0 then
message1(msg_pointer_ext)(blk_pointer_ext-nzer):='0';
nzer:=nzer-1;
end if;
end loop;
end if;
copy:='0';
end process;
process(com_delayed)
variable msg_pointer : INTEGER range 0 to 20:=0; --pointing to a number of message block
variable blk_pointer : INTEGER range 0 to 50:=0; --pointing to a number of bit from the current block
variable nzer : INTEGER range 0 to 9:=0;
variable njed : INTEGER range 0 to 9:=0;
variable copy : STD_LOGIC;
begin
if rising_edge(com_delayed) then
msg_pointer:=msg_pointer_ext;
blk_pointer:=blk_pointer_ext;
if com_level_time <= 80 then
blk_pointer:=blk_pointer+1;
nzer:=1;
copy:='1';
elsif (com_level_time>80 and com_level_time<=142) then
blk_pointer:=blk_pointer+2;
nzer:=2;
copy:='1';
elsif (com_level_time>142 and com_level_time<=200) then
blk_pointer:=blk_pointer+3;
nzer:=3;
copy:='1';
elsif (com_level_time>200 and com_level_time<=274) then
blk_pointer:=blk_pointer+4;
nzer:=4;
copy:='1';
elsif (com_level_time>274 and com_level_time<=336) then
blk_pointer:=blk_pointer+5;
nzer:=5;
copy:='1';
elsif (com_level_time>336 and com_level_time<=396) then
blk_pointer:=blk_pointer+6;
nzer:=6;
copy:='1';
elsif (com_level_time>396 and com_level_time<=460) then
blk_pointer:=blk_pointer+7;
nzer:=7;
copy:='1';
elsif (com_level_time>460 and com_level_time<=526) then
blk_pointer:=blk_pointer+8;
nzer:=8;
copy:='1';
elsif (com_level_time>526 and com_level_time<=630) then
blk_pointer:=blk_pointer+9;
nzer:=9;
copy:='1';
end if;
if copy='1' then
For it in 1 to 9 loop
if nzer/=0 then
message1(msg_pointer)(blk_pointer-nzer):='0';
nzer:=nzer-1;
end if;
end loop;
end if;
copy:='0';
msg_pointer_ext:=msg_pointer;
blk_pointer_ext:=blk_pointer;
end if;
end process;
process(com_delayed)
variable msg_pointer : INTEGER range 0 to 20:=0; --pointing to a number of message block
variable blk_pointer : INTEGER range 0 to 50:=0; --pointing to a number of bit from the current block
variable nzer : INTEGER range 0 to 9:=0;
variable njed : INTEGER range 0 to 9:=0;
variable copy : STD_LOGIC;
begin
if falling_edge(com_delayed) then
msg_pointer:=msg_pointer_ext;
blk_pointer:=blk_pointer_ext;
if com_level_time > 4500 then
msg_pointer := 0;
blk_pointer := 0;
elsif ( com_level_time < 4500 ) and ( com_level_time > 630 ) then
msg_pointer := 1;
blk_pointer := 0;
elsif blk_pointer >= 9 then
blk_pointer:=0;
if msg_pointer<6 then
msg_pointer:=msg_pointer+1;
end if;
elsif com_level_time <= 80 then
blk_pointer:=blk_pointer+1;
njed:=1;
copy:='1';
elsif (com_level_time>80 and com_level_time<=142) then
blk_pointer:=blk_pointer+2;
njed:=2;
copy:='1';
elsif (com_level_time>142 and com_level_time<=200) then
blk_pointer:=blk_pointer+3;
njed:=3;
copy:='1';
elsif (com_level_time>200 and com_level_time<=274) then
blk_pointer:=blk_pointer+4;
njed:=4;
copy:='1';
elsif (com_level_time>274 and com_level_time<=336) then
blk_pointer:=blk_pointer+5;
njed:=5;
copy:='1';
elsif (com_level_time>336 and com_level_time<=396) then
blk_pointer:=blk_pointer+6;
njed:=6;
copy:='1';
elsif (com_level_time>396 and com_level_time<=460) then
blk_pointer:=blk_pointer+7;
njed:=7;
copy:='1';
elsif (com_level_time>460 and com_level_time<=526) then
blk_pointer:=blk_pointer+8;
njed:=8;
copy:='1';
elsif (com_level_time>526 and com_level_time<=630) then
blk_pointer:=blk_pointer+9;
njed:=9;
copy:='1';
end if;
if copy='1' then
For it in 1 to 9 loop
if njed/=0 then
message1(msg_pointer)(blk_pointer-njed):='0';
njed:=njed-1;
end if;
end loop;
end if;
copy:='0';
msg_pointer_ext:=msg_pointer;
blk_pointer_ext:=blk_pointer;
end if;
end process;
process(clk_com, com_ecu38)
variable com_clear : STD_LOGIC:='0';
variable tclt : INTEGER range 0 to 32000:=0;
begin
if rising_edge(clk_com) and tclt /= 31999 then
tclt := tclt +1;
end if;
if com_ecu38'event then
com_level_time:=tclt;
com_clear:='1';
end if;
if com_clear='1' then
tclt:=0;
com_delayed<=com_ecu38;
end if;
com_clear:='0';
end process;
process(com_delayed)
begin
if rising_edge(com_delayed) then
if com_level_time>20 and com_level_time<=80 then
nzer:=1;
elsif (com_level_time>80 and com_level_time<=142) then
nzer:=2;
elsif (com_level_time>142 and com_level_time<=200) then
nzer:=3;
elsif (com_level_time>200 and com_level_time<=274) then
nzer:=4;
elsif (com_level_time>274 and com_level_time<=336) then
nzer:=5;
elsif (com_level_time>336 and com_level_time<=396) then
nzer:=6;
elsif (com_level_time>396 and com_level_time<=460) then
nzer:=7;
elsif (com_level_time>460 and com_level_time<=526) then
nzer:=8;
elsif (com_level_time>526 and com_level_time<=630) then
nzer:=9;
else
nzer:=0;
end if;
copy0<=not(copy0);
end if;
end process;
process(com_delayed)
begin
if falling_edge(com_delayed) then
if com_level_time > 4500 then
njed:=12;
elsif com_level_time > 630 and com_level_time <= 4500 then
njed:=11;
elsif com_level_time>20 and com_level_time<=80 then
njed:=1;
elsif (com_level_time>80 and com_level_time<=142) then
njed:=2;
elsif (com_level_time>142 and com_level_time<=200) then
njed:=3;
elsif (com_level_time>200 and com_level_time<=274) then
njed:=4;
elsif (com_level_time>274 and com_level_time<=336) then
njed:=5;
elsif (com_level_time>336 and com_level_time<=396) then
njed:=6;
elsif (com_level_time>396 and com_level_time<=460) then
njed:=7;
elsif (com_level_time>460 and com_level_time<=526) then
njed:=8;
elsif (com_level_time>526 and com_level_time<=630) then
njed:=9;
else
njed:=0;
end if;
copy1<=not(copy1);
end if;
end process;
process(copy1, copy0)
variable n : INTEGER range 0 to 9:=0;
variable bit_to_write : STD_LOGIC;
variable inc_msg : STD_LOGIC;
variable c1 : STD_LOGIC;
variable c0 : STD_LOGIC;
variable msg_pointer : INTEGER range 0 to 20:=0; --pointing to a number of message block
variable blk_pointer : INTEGER range 0 to 50:=0; --pointing to a number of bit from the current block
begin
if copy1'event then
n:=njed;
c1:='1';
elsif copy0'event then
n:=nzer;
c0:='1';
end if;
msg_pointer:=msg_pointer_ext;
blk_pointer:=blk_pointer_ext;
if c1='1' then
bit_to_write:='1';
elsif c0='1' then
bit_to_write:='0';
end if;
if n=12 then
msg_pointer:=0;
blk_pointer:=0;
com_ch_out<=not(com_ch_out);
elsif n=11 then
msg_pointer:=1;
blk_pointer:=0;
else
if blk_pointer + n <9 then
blk_pointer:=blk_pointer+n;
else
n:=9-blk_pointer;
inc_msg:='1';
blk_pointer:=9;
end if;
For it in 1 to 9 loop
if n/=0 then
message1(msg_pointer)(blk_pointer-n):=bit_to_write;
n:=n-1;
end if;
end loop;
end if;
if inc_msg='1' then
if msg_pointer<5 then
blk_pointer_ext:=0;
msg_pointer_ext:=msg_pointer+1;
end if;
else
msg_pointer_ext:=msg_pointer;
blk_pointer_ext:=blk_pointer;
end if;
n:=0;
inc_msg:='0';
c1:='0';
c0:='0';
end process;
process(com_ch_out)
begin
if com_ch_out'event then
if latch_outputs='0' then
if stc_decide = '0' then
S14T7C7(0)<=message1(1)(1);
S14T7C7(1)<=message1(1)(2);
S14T7C7(2)<=message1(1)(3);
S14T7C7(3)<=message1(1)(4);
S14T7C7(4)<=message1(1)(5);
S14T7C7(5)<=message1(1)(6);
S14T7C7(6)<=message1(1)(7);
S14T7C7(7)<=message1(2)(1);
S14T7C7(8)<=message1(2)(2);
S14T7C7(9)<=message1(2)(3);
S14T7C7(10)<=message1(2)(4);
S14T7C7(11)<=message1(2)(5);
S14T7C7(12)<=message1(2)(6);
S14T7C7(13)<=message1(2)(7);
else
S14T7C7(0)<=message1(4)(1);
S14T7C7(1)<=message1(4)(2);
S14T7C7(2)<=message1(4)(3);
S14T7C7(3)<=message1(4)(4);
S14T7C7(4)<=message1(4)(5);
S14T7C7(5)<=message1(4)(6);
S14T7C7(6)<=message1(4)(7);
S14T7C7(7)<=C7I(0);
S14T7C7(8)<=C7I(1);
S14T7C7(9)<=C7I(2);
S14T7C7(10)<=C7I(3);
S14T7C7(11)<=C7I(4);
S14T7C7(12)<=C7I(5);
S14T7C7(13)<=C7I(6);
end if;
end if;
end if;
end process;