Error (10309): VHDL Interface Declaration error in spi_sensor.vhd(41): interface object "data" of mode out cannot be read. Change object mode to buffer.
时间: 2024-03-10 21:48:46 浏览: 285
这个错误的意思是在spi_sensor.vhd文件的第41行,接口对象"data"的模式为输出(out),但是该对象又被尝试读取。应该将该对象的模式改为缓存(buffer)。请检查代码并将"data"对象的模式改为缓存(buffer)。例如:
```
signal data : std_logic_vector(7 downto 0);
...
data : out std_logic_vector(7 downto 0)
```
应该改为:
```
signal data : std_logic_vector(7 downto 0);
...
data : buffer std_logic_vector(7 downto 0)
```
相关问题
LIBRARY IEEE; USE IEEE.std_logic_1164.ALL; ENTITY multi_process IS PORT(P1: IN BIT; P2: OUT BIT); END multi_process; ARCHITECTURE catch OF multi_process IS SIGNAL p21,p12: Bit :='0'; BEGIN ComA:PROCESS(P1,P2) BEGIN IF P21='1'AND P1='1'THEN P12<='1'; ELSE P12<='0'; END IF; END PROCESS ComA; ComB:PROCESS(P12) BEGIN IF P12='1'THEN P21<='1'; P2<='1'; ELSE P21<='0'; END IF; END PROCESS ComB; END catch;Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.Error (10309): VHDL Interface Declaration error in multi_process.vhd(10): interface object "P2" of mode out cannot be read. Change object mode to buffer.
这个错误提示是因为在VHDL中,out模式的接口对象只能被写入,不能被读取,但是在你的代码中,你尝试去读取一个被声明为out模式的接口对象"P2",从而导致了这个错误。
解决这个问题的方法是将"P2"的模式从out改为buffer。buffer模式的接口对象既可以被读取也可以被写入,这样就可以解决这个错误了。另外,你的代码中的"P21"和"P12"也应该修改为"p21"和"p12",因为VHDL中是区分大小写的。
修改后的代码如下:
```
LIBRARY IEEE;
USE IEEE.std_logic_1164.ALL;
ENTITY multi_process IS
PORT(
P1: IN BIT;
P2: BUFFER BIT
);
END multi_process;
ARCHITECTURE catch OF multi_process IS
SIGNAL p21, p12: BIT := '0';
BEGIN
ComA: PROCESS(P1, p21)
BEGIN
IF p21 = '1' AND P1 = '1' THEN
p12 <= '1';
ELSE
p12 <= '0';
END IF;
END PROCESS ComA;
ComB: PROCESS(p12)
BEGIN
IF p12 = '1' THEN
p21 <= '1';
P2 <= '1';
ELSE
p21 <= '0';
P2 <= '0';
END IF;
END PROCESS ComB;
END catch;
```
Error (10309): VHDL Interface Declaration error in fill_up.vhd(235): interface object "final_2" of mode out cannot be read. Change object mode to buffer.
这个错误发生在VHDL代码的第235行,错误提示是“接口对象“final_2”的模式为输出,不能被读取。将对象模式更改为缓冲区。”这个错误通常是因为在接口对象的声明中,模式被设置为“out”,但是在代码中却试图读取该对象的值,而“out”模式只能用于输出数据,不能用于读取数据。
要解决这个错误,需要将接口对象的模式从“out”更改为“buffer”。这样,该对象就可以被读取和写入了。如果你的代码确实需要在该接口对象上执行读取操作,那么你需要将其模式更改为“inout”,这样该对象就可以用于输入和输出数据了。
示例代码:
```
interface final_2 is buffer std_logic_vector(7 downto 0);
```
或者
```
interface final_2 is inout std_logic_vector(7 downto 0);
```
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