本文转载自： 无界逻辑（微信号：wujieluoji）微信公众号
我们开发FPGA，需要使用硬件描述语言（Hardware Description Language），简称HDL。当前使用最广泛的硬件描述逻辑功能语言是verilog，VHDL和是ystemverilg也有部分工程师在坚持使用。
HDL会涉及到标识符，标识符适用于定义常数，变量，信号，端口，子模块或者参数宏的名称。如何给标识符起名字，特别关键，至关重要，看到标识符，就应该知道这个标识符的内在含义。方便后来者或者以后对代码的阅读理解。
针对参数，推荐采用P_PARAMETER的命名方式，大写，P_前缀。
针对宏定义，推荐采用M_MCRO的命名方式，大写，M_前缀。
而对信号命名和模块命名，三字经法和驼峰法比较常用。
驼峰法，又分为小驼峰和大驼峰，比较常用。
如下图所示小驼峰命名法。
此处推荐”三字经“的写法，即利用三个左右的字母缩写加下划线级联的方式命名。
如：dma_len，atr_din_rdy
常用的缩写如下表：
| 全拼 | 缩写 |
| acknowledge | ack |
| addition | add |
| address | addr |
| almost empty | aempty |
| almost full | afull |
| answer | ans |
| argument | arg |
| array | arr |
| asynchrounus | async |
| audio | aud |
| average | avg |
| back | bk |
| block | blk |
| blue | blu |
| bottom | bot |
| buffer | buff |
| calculate | calc |
| capture | capt |
| change | chg |
| channel | ch |
| character | char |
| check | chk |
| chip select | cs |
| clock | clk |
| clear | clr |
| column | col |
| combine | cmb |
| command | cmd |
| compare | cmp |
| configure | cfg |
| consume | csm |
| control | ctrl |
| count | cnt |
| current | curr |
| data | dat |
| debug | dbg |
| decode/decoder | dec |
| define | def |
| delay | dly |
| delay1cycle | _d1 |
| delay2cycle | _d2 |
| delay3cycle | _d3 |
| delete | del |
| destination | dst |
| detect | det |
| device | dev |
| different | diff |
| directory | dir |
| display | disp |
| division/divide | div |
| document | doc |
| double | dbl |
| double buffer | drop |
| dynamic | dyna |
| empty | ept |
| enable | en |
| encode/eoncoder | enc |
| environment | env |
| error | err |
| ethernet | eth |
| execute | exec |
| extend | ext |
| feed back | fb |
| filter | flt |
| finish | fin |
| finite state machine | fsm |
| first | 1st |
| flag | flg |
| frame | frm |
| frame per second | fps |
| frequency | freq |
| full | ful |
| function | fun |
| generate | gen |
| global | glb |
| green | gre |
| ground | gnd |
| group | grp |
| header | hdr |
| heartbeat | htbt |
| height | ht |
| high | _h |
| identification | id |
| image | img |
| implement | impl |
| increment | inc |
| index | idx |
| information | info |
| initalize | init |
| inout | io_ |
| input | i_ |
| input & output | io |
| insert | ins |
| interface | if |
| interrupt | int |
| iteration | itr |
| layer | lay |
| length | len |
| level | lev |
| library | lib |
| line | ln |
| link | lnk |
| list | lst |
| local | loc |
| logical | log |
| low | _l |
| make | mk |
| manager | mgr |
| master | mst |
| match | mat |
| maximum | max |
| memory | mem |
| message | msg |
| micro block | mb |
| middle | mid |
| minimum | min |
| mouse & keyboard | mk |
| multiplication | mul |
| negedge/falling | neg |
| negitivt | _n |
| next | nxt |
| number | num |
| object | obj |
| operand | op |
| operator | optr |
| optimization | opt |
| origin/original | org |
| output | o_ |
| over flow | of |
| package | pkg |
| packet | pkt |
| padding | pad |
| parameter | para |
| password | psw |
| payload type | pt |
| physical | phy |
| picture | pic |
| point | pnt |
| pointer | ptr |
| posedge/raising | pos |
| position | pos |
| positive | _p |
| power | pwr |
| previous | pre |
| process/procedure | proc |
| public | pub |
| read | rd |
| read only | ro |
| read write | rw |
| ready | rdy |
| receive | rx |
| record | rcd |
| red | r |
| region | rgn |
| register | reg |
| release | rls |
| request | req |
| reset | rst |
| result | res |
| return | ret |
| screen | srcn |
| second | 2nd |
| segment | seg |
| select | sel |
| server | svr |
| signaling | sig |
| slave | slv |
| slice | slc |
| source | src |
| stack | stk |
| standard | std |
| start | st |
| state | s_ |
| status | stat |
| stream | strm |
| string | str |
| subtraction | sub |
| summation | sum |
| synchronization | syn |
| system | sys |
| table | tbl |
| temporary | tmp |
| test | tst |
| text | txt |
| third | 3rd |
| threshold | th |
| time stamp | ts |
| total | tot |
| transmitter | tx |
| triple | tri |
| tristate | t_ |
| update | upd |
| upgrade | upg |
| user interface | ui |
| utility | util |
| valid | vld |
| value | val |
| variable | var |
| variable length code | vlc |
| version | ver |
| vertical synchronous | vsync |
| video | vid |
| wide/width | wd |
| window | wnd |
| wire | w_ |
| write | wr |
| cyclic redundancy check | crc |
需要特别注意的是，命名一定要避免使用verilog，systemverilog的保留字。
还有哪些常用的缩略语，请推荐给作者。
