为什么信号不更新？

大家好，
我是FPGA和VDHL的新手。
我跟他们打了几个月，我觉得我有基本的概念。
但是这个让我很困惑。
我有这两个过程：
LED2Updating：进程（WCMDFlag，PushButton，ClearColCount）
开始
如果ClearColCount ='1'那么
ColCount'0'）;
其他
如果PushButton ='0'那么
LED2'0'）;
其他
如果rising_edge（WCMDFlag）那么
如果AddressBus（9 downto 0）= VarACol（9 downto 0）那么
ColCount
此过程监视总线，如果信号匹配，则LED2和更新CMDColAddrMatched信号应为1。
实际上，LED2实际上是开启的。
但对于这个过程：
MatchCounterUpdate：process（UpdateCMDRowAddrMatched，UpdateCMDColAddrMatched，PushButton）
开始
如果PushButton ='0'那么
MatchCounter
只要UpdateCMDColAddrMatched信号打开，LED1就应该打开。
但事实并非如此。
LED1永远不会打开。
我认为逻辑非常简单。
如果LED2亮起，则更新CMDColAddrMatched应​​为1。
如果theUpdateCMDColAddrMatched为1，则LED1亮起。
但实际上，LED2已打开，但LED1不亮。
我不知道为什么它不像我预期的那样工作..
请给我一些提示。
非常感谢你，
阿什利



以下为原文

Hi all,

I am new to FPGA and VDHL. I tackled with them for a couple months and I think I have the basic concept.

But this one really confuse me.

I have these two processes:

LED2Updating : process (WCMDFlag, PushButton, ClearColCount)beginif ClearColCount = '1' thenColCount <= (others => '0');elseif PushButton = '0' thenLED2 <= '0';UpdateCMDColAddrMatched <= '0';ColCount <= (others => '0');else if rising_edge (WCMDFlag) thenif AddressBus(9 downto 0) = VarACol(9 downto 0) thenColCount <= ColCount + 1;else if AddressBus(9 downto 0) = CMDCol (9 downto 0) thenUpdateCMDColAddrMatched <= '1';LED2 <= '1';-- LED2else UpdateCMDColAddrMatched <= '0';end if;end if;end if;end if;end if;end process; This process monitor the bus and if the signal matches, the LED2 and the UpdateCMDColAddrMatched signal should be 1.
And in reality, the LED2 is actually ON.

But for this peice of process:
MatchCounterUpdate : process (UpdateCMDRowAddrMatched, UpdateCMDColAddrMatched, PushButton)beginif PushButton = '0' thenMatchCounter <= InitMatchCounter;LED1 <= '0';-- LED1else if UpdateCMDColAddrMatched = '1' then LED1 <= '1';-- LED1if UpdateCMDRowAddrMatched = '1' thenMatchCounter <= conv_integer('0'&DataBus);LED <= DataBus(4 downto 0);else-- LED1 <= '0';end if;else-- LED1 <= '0';end if;end if;end process; The LED1 should be on as long as the UpdateCMDColAddrMatched signal is on. But it doesn't. The LED1 is never on.

I think the logic is pretty simple.
If the LED2 is on, then UpdateCMDColAddrMatched should be 1.
And if the UpdateCMDColAddrMatched is 1, the LED1 is on.

But in reality, the LED2 is on but the LED1 is not. I have no idea why it doesn't work as I expected..
Please give me some hint on it.

Thank you very much,
Ashley