src/spec/testing_stage1.py

   1 #!/usr/bin/env python
   2 from nmigen.build.dsl import Resource, Subsignal, Pins
   3 from nmigen.build.plat import Platform # Not sure where platform comes from?
   4
   5 # Was thinking of using these functions, but skipped for simplicity for now
   6 #from pinfunctions import i2s, lpc, emmc, sdmmc, mspi, mquadspi, spi, quadspi, i2c, mi2c, jtag, uart, uartfull, rgbttl, ulpi, rgmii, flexbus1, flexbus2, sdram1, sdram2, sdram3, vss, vdd, sys, eint, pwm, gpio
   7
   8 # File for stage 1 pinmux tested proposed by Luke, https://bugs.libre-soc.org/show_bug.cgi?id=50#c10
   9
  10 def dummy_pinset():
  11     # sigh this needs to come from pinmux.
  12     gpios = []
  13     for i in range(16):
  14         gpios.append("%d*" % i)
  15     return {'uart': ['tx+', 'rx-'],
  16             'gpio': gpios,
  17             'i2c': ['sda*', 'scl+']}
  18
  19 """
  20 a function is needed which turns the results of dummy_pinset()
  21 into:
  22
  23 [UARTResource("uart", 0, tx=..., rx=..),
  24  I2CResource("i2c", 0, scl=..., sda=...),
  25  Resource("gpio", 0, Subsignal("i"...), Subsignal("o"...)
  26  Resource("gpio", 1, Subsignal("i"...), Subsignal("o"...)
  27  ...
  28 ]
  29 """
  30 def create_resources(pinset):
  31     resources = []
  32     for periph, pins in pinset.items():
  33         print(periph, pins)
  34         if periph == 'i2c':
  35             #print("I2C required!")
  36             resources.append(I2CResource('i2c', 0, sda='sda0', scl='scl0'))
  37         elif periph == 'uart':
  38             #print("UART required!")
  39             resources.append(UARTResource('uart', 0, tx='tx0', rx='rx0'))
  40         elif periph == 'gpio':
  41             #print("GPIO required!")
  42             resources.append(Resource('gpio', 0, Subsignal("i", Pins('i0', dir="i", conn=None, assert_width=1)), Subsignal("o", Pins('o0', dir="o", conn=None, assert_width=1))))
  43     return resources
  44
  45 def UARTResource(*args, rx, tx, rts=None, cts=None, dtr=None, dsr=None, dcd=None, ri=None,
  46                  conn=None, attrs=None, role=None):
  47     io = []
  48     io.append(Subsignal("rx", Pins(rx, dir="i", conn=conn, assert_width=1)))
  49     io.append(Subsignal("tx", Pins(tx, dir="o", conn=conn, assert_width=1)))
  50     if attrs is not None:
  51         io.append(attrs)
  52     return Resource.family(*args, default_name="uart", ios=io)
  53
  54 def I2CResource(*args, scl, sda, conn=None, attrs=None):
  55     io = []
  56     io.append(Subsignal("scl", Pins(scl, dir="io", conn=conn, assert_width=1)))
  57     io.append(Subsignal("sda", Pins(sda, dir="io", conn=conn, assert_width=1)))
  58     if attrs is not None:
  59         io.append(attrs)
  60     return Resource.family(*args, default_name="i2c", ios=io)
  61
  62
  63 """
  64 and to create a Platform instance with that list, and build
  65 something random
  66
  67    p=Platform()
  68    p.resources=listofstuff
  69    p.build(Blinker())
  70 """
  71 pinset = dummy_pinset()
  72 resources = create_resources(pinset)
  73 print(pinset)
  74 print(resources)
  75 p=Platform(resources)
  76 p.resources = create_resources(pinset)
  77 p.build(Blinker())
  78