targets/simple.py

   1 from migen.fhdl.std import *
   2
   3 from misoclib import gpio, spiflash
   4 from misoclib.gensoc import GenSoC
   5
   6 class SimpleSoC(GenSoC):
   7         def __init__(self, platform):
   8                 GenSoC.__init__(self, platform,
   9                         clk_freq=32*1000000,
  10                         cpu_reset_address=0x60000)
  11
  12                 # We can't use reset_less as LM32 does require a reset signal
  13                 self.clock_domains.cd_sys = ClockDomain()
  14                 self.comb += self.cd_sys.clk.eq(platform.request("clk32"))
  15                 self.specials += Instance("FD", p_INIT=1, i_D=0, o_Q=self.cd_sys.rst, i_C=ClockSignal())
  16
  17                 self.submodules.leds = gpio.GPIOOut(platform.request("user_led"))
  18
  19                 self.submodules.spiflash = spiflash.SpiFlash(platform.request("spiflash2x"),
  20                         cmd=0xefef, cmd_width=16, addr_width=24, dummy=4)
  21                 self.register_rom(self.spiflash.bus)
  22
  23 def get_default_subtarget(platform):
  24         return SimpleSoC