Time series logic _ lags behind one pixel

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• Time series logic _ lags behind one pixel

Time series logic _ lags behind one pixel

Recently I picked up VGA again, because the pixel must be absolutely accurate, so ......

When displaying Chinese characters, I am very depressed. How do I always display the rightmost column of Chinese characters on the leftmost ??? Why don't you think about it ......

ProgramAs follows:

Very depressed, obviously it is right, but why is it wrong ??

Crash.

When I was a child, I suddenly thought that it would be okay to translate the displayed content into a pixel to the right ??, So we added 1 to the X coordinate judgment statement.

However, this is only the result. The result is good, but I don't know what the process is. I only know that a time period lags behind, that is, a pixel, but I don't know how to deal with it.

Continue to crash ...... Suddenly, since the pixel of the output Chinese Character lags behind a clock, why not use the combination logic ?? All errors have been solved.

I couldn't help myself. I remembered that Chinese characters were cheap to the right when I used VHDL. At that time, I still had insufficient ability. I don't know. Now I have finally solved the problem. Haha, let me go ......

Someone once told me that he didn't need to combine logic. He only used time series logic to explain how the time series logic is stable. I seem to understand it ......

Now we know that, in fact, many times, the time series logic will lead you to lag behind a clock cycle. When the main time series is very accurate, this needs to be taken into account and cannot be ignored; of course, if you light up the light emitting diode again, you do not need to worry about it .. Obviously, the timing is accurate ......

Therefore, when the device reaches a certain speed and requires a very accurate and stable time series, the combination logic and time series logic should also be used with caution,

The logic function of a combined logic circuit is that the output at any time is only dependent on the input at that time, and is irrelevant to the original state of the circuit. The logic function of the time series logical circuit is that the output at any time depends not only on the input signal at that time, but also on the original state of the circuit, or also on the previous input.

At this moment, the Chinese character display on VGA is quite standard. Haha, the combination logic is really good ......