FSM问题

jamyce

请教各位大虾，什么叫做verbose one-hot encoding，/simplified one-hot encoding以及one-hot with zero-idle encoding，它们之间有什么区别，哪种情况下应采用相应的FSM编码方式？

hotcoco

1：？
2：简化的独热编码
3：0空闲的独热编码？就是1有效，0无效的那种？
错了就当搞笑了：）

bravelu

parameter [4:0] IDLE = 5'b00001,
S1 = 5'b00010,
S2 = 5'b00100,
S3 = 5'b01000,
ERROR = 5'b10000;
Example 2 - Parameter definitions for verbose one-hot encoding
parameter [4:0] IDLE = 5'd0,
S1 = 5'd1,
S2 = 5'd2,
S3 = 5'd3,
ERROR = 5'd4;
Example 3 - Parameter definitions for simplified one-hot encoding
The simplified one-hot encoding shown Example 3 uses decimal numbers to index into the state
register. This technique permits comparison of single bits as opposed to comparing against the
entire state vector using the full state parameters shown in Example 2.
parameter [4:1] // ERROR is 4'b0000
IDLE = 4'd1,
S1 = 4'd2,
S2 = 4'd3,
S3 = 4'd4;
Example 4 - Parameter definitions for one-hot with zero-idle encoding
The one-hot with zero-idle encoding can yield very efficient FSMs for state machines that have
many interconnections with complex equations, including a large number of connections to one
particular state. Frequently, multiple transitions are made either to an IDLE state or to another
common state (such as the ERROR-state in this example).
以上引自 《State Machine Coding Styles for Synthesis》 Clifford E. Cummings

atuhappy

State Machine Coding styles for Synthesis
这本书哪里有

atuhappy

找到了

jamyce

多谢了！

jollyzhao

ths

yuzhicai

好东西