怎么开发一个使用负值和正值的向上计数器

尝试使用签名类型。
这些将是两个补码，它们允许您可视化负数。还要记住，负数是一种幻觉;
没有这样的东西;-)只有方向和自然数（即> = 0）。
所以你要做的是将其中一个位指定为方向指示，比如说MSB。
一种选择是仅将此位用于符号，将其余位用作幅度。
这被称为一个补码，它有两个问题：它有两个零，即0.0和1.0，在硬件中实现它更复杂。
第二种选择是将-2 ^（N-1）值分配给MSB，并将其余位视为正。
这被称为二进制补码，实现的逻辑是你所期望的（即0-1给你所有的等），它只有一个零即全零模式。
- 如果提供的信息有用，请将答案标记为“接受为解决方案”。给予您认为有用且回复的帖子。
在原帖中查看解决方案



以下为原文

Try using signed types. These will be two's complement and they allow you to visualize negative numbers.
Also keep in mind, negative numbers are an illusion; no such thing ;-) Only direction and natural numbers (ie >= 0). So what you do is assign one of the bits as direction indication, say MSB. One option is to use this bit only for sign and the rest of the bits as magnitude. This is called one's complement and it has two issues: it has two zeros ie 0.0 and 1.0 and it's more complicated to implement it in hardware. The second option is to assign -2^(N-1) value to the MSB and treat the rest of the bits as positive. This is called two's complement and the logic to implement is what you would expect (ie 0-1 gives you all ones etc) and it has only one zero ie the all zero pattern.- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.View solution in original post

尝试使用签名类型。
这些将是两个补码，它们允许您可视化负数。还要记住，负数是一种幻觉;
没有这样的东西;-)只有方向和自然数（即> = 0）。
所以你要做的是将其中一个位指定为方向指示，比如说MSB。
一种选择是仅将此位用于符号，将其余位用作幅度。
这被称为一个补码，它有两个问题：它有两个零，即0.0和1.0，在硬件中实现它更复杂。
第二种选择是将-2 ^（N-1）值分配给MSB，并将其余位视为正。
这被称为二进制补码，实现的逻辑是你所期望的（即0-1给你所有的等），它只有一个零即全零模式。
- 如果提供的信息有用，请将答案标记为“接受为解决方案”。给予您认为有用且回复的帖子。



以下为原文

Try using signed types. These will be two's complement and they allow you to visualize negative numbers.
Also keep in mind, negative numbers are an illusion; no such thing ;-) Only direction and natural numbers (ie >= 0). So what you do is assign one of the bits as direction indication, say MSB. One option is to use this bit only for sign and the rest of the bits as magnitude. This is called one's complement and it has two issues: it has two zeros ie 0.0 and 1.0 and it's more complicated to implement it in hardware. The second option is to assign -2^(N-1) value to the MSB and treat the rest of the bits as positive. This is called two's complement and the logic to implement is what you would expect (ie 0-1 gives you all ones etc) and it has only one zero ie the all zero pattern.- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.

除了符号/幅度和二进制补码之外，您还可以考虑偏移二进制。
在这种情况下，计数器是无符号的，您的中心位置是1/2刻度（MSB 1，其他位为零）。
实际上，除了复位条件之外，这种方法应该构建几乎与2的补码方法相同的硬件。
-  Gabor



以下为原文

In addition to sign/magnitude and two's complement, you might consider offset binary.  In that case the counter is unsigned and your center position is 1/2 scale (MSB one, other bits zero).  In reality this method should build hardware that is almost identical to the 2's complement approach, with the exception of the reset condition.
-- Gabor

嗨Gabor，
感谢您的答复。
现在我决定使用无符号方式，中途为零值。
在我开始工作后，我计划尝试按照签名方式设计计数器。
谢谢， 
加里



以下为原文

Hi Gabor,
 
Thank you for the response.  Right now I decided to use the unsigned way with half way up being my zero value.
After I get that working I plan to try to design the counter the signed way.
 
Thank You,
  Gary