The responsive register drawing command line tool.
regart
regart (-n|--name) <name>
regart (-a|--address) <address>
regart (-w|--width) <width>
regart (-s|-section) <section_string> ...
regart (-h|--help)
regart (-v|--version)
regart (-f|--forgive)
-n --name Name of the register. Default: REG.
-a --address Register address. By default there is no address defined.
-w --width Register width. Default is 8.
-s --section Section definition string. Syntax: "name@from:to"
-h --help Prints out this help.
-v --version Prints out the version number.
-f --forgive Allows position redefinition. Firs section will be kept.
You can install regart via pip:
[sudo] pip install regart
All previously described options are optional. If you did not specify any parameter, an empty register will be printed out:
$ regart
/*------------------------------#
| REG |
#-------------------------------#
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
#------------------------------*/
As you can see, the default name is REG and the default width is 8 bits. You can also notice that if there is no section defined, the register section row did not get printed. You can add name, address and different width to your register:
$ regart --name REGA --address 0x120 --width 16
/*--------------------------------------------------------------------#
| REGA 0x120 |
#---------------------------------------------------------------------#
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
#--------------------------------------------------------------------*/
These were the long named options. You can also use the short versions to save typing: $ regart -n REGA -a 0x120 -w 16. The result will be the same. The address was given as a hexadecimal number, but you are free to use decimal numbers as well.
For the register width the only limitation is your screen width :D
Let's define some register sections!
$ regart --section SECTION@0:7
/*------------------------------#
| REG |
#-------------------------------#
| SECTION |
#-------------------------------#
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
#------------------------------*/
There is a new row below the register name. This row is the register section definition row. We have defined a section named SECTION from bit 0 to bit 7 with the following syntax: "name@from:to". You can also change direction of the definition: "name@to:from".
I you left out one of the position limit, the defined section will be added as a one bit wide section.
You can use the short section definition as well: $ regart -s SECTION@0:7. Be careful, when you define sections. The defined sections have to fill the entire register width. The following definition is syntactically wrong:
$ regart -s SECTION@0:5
Sections do not fill the register width. The default register width is 8 bit. The defined section takes 6 bits, so the last 2 bits are undefined. This is an error. You always have to define all bits in your registers.
Let's see a fully defined 8 bit wide register:
$ regart -n REGA -a 0x123 -s STATUS@7:5 -s CARRY@4 -s ENABLE@3 -s SUM@2:0
/*---------------------------------------#
| REGA 0x123 |
#----------------------------------------#
| STATUS | CARRY | ENABLE | SUM |
#----------------------------------------#
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
#---------------------------------------*/
Sections are responsive, as they take up as much space as the needs to keep themselves aligned with their bits.
You can use regart as a python module as well. The following example code will demonstrate the usage. It will prodice the same output as the previous command:
import regart
reg = {
'name': 'REGA',
'address': '0x123',
'width': 8,
'sections': {
'STATUS': {
'position': 5,
'size': 3
},
'CARRY': {
'position': 4,
'size': 1
},
'ENABLE': {
'position': 3,
'size': 1
},
'SUM': {
'position': 0,
'size': 3
}
}
}
result = regart.generate(reg)
print(result)
As you can see, this is basically the same register description. The only difference is the way you define the sections. Instead of the from-to approach you define the lowest bit number and the section size. Every key in the reg dictionay is optional too. You can pass an empty dictionary as well, and the default register art will be produced.
There is an optional mode, that allows you to omit or redefine sections. Omitted sections will be replaced a 1 bit section with the name of'-'. Redefined sections will be ignored. The section with the smallest size will be kept in alphabetic order.
You can turn on this mode from the command line with the -f switch, or from python code the extra parameter of the generate funciton:
regart.generate(reg, forgiveness=True)
The MIT License (MIT)
Copyright (c) 2016 Tibor Simon
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