src/bsv/peripheral_gen/twi.py

   1 from bsv.peripheral_gen.base import PBase
   2
   3 class twi(PBase):
   4
   5     def slowimport(self):
   6         return "    import I2C_top           :: *;"
   7
   8     def slowifdecl(self):
   9         return "            interface I2C_out twi{0}_out;\n" + \
  10                "            method Bit#(1) twi{0}_isint;"
  11
  12     def num_axi_regs32(self):
  13         return 8
  14
  15     def mkslow_peripheral(self, size=0):
  16         return "        I2C_IFC twi{0} <- mkI2CController();"
  17
  18     def _mk_connection(self, name=None, count=0):
  19         return "twi{0}.slave_i2c_axi"
  20
  21     def pinname_out(self, pname):
  22         return {'sda': 'out.sda_out',
  23                 'scl': 'out.scl_out'}.get(pname, '')
  24
  25     def pinname_in(self, pname):
  26         return {'sda': 'out.sda_in',
  27                 'scl': 'out.scl_in'}.get(pname, '')
  28
  29     def pinname_outen(self, pname):
  30         return {'sda': 'out.sda_out_en',
  31                 'scl': 'out.scl_out_en'}.get(pname, '')
  32
  33     def pinname_tweak(self, pname, typ, txt):
  34         if typ == 'outen':
  35             return "pack({0})".format(txt)
  36         return txt
  37
  38     def num_irqs(self):
  39         return 3
  40
  41     def plic_object(self, pname, idx):
  42         return ["{0}.isint()",
  43                 "{0}.timerint()",
  44                 "{0}.isber()"
  45                ][idx].format(pname)
  46
  47     def mk_ext_ifacedef(self, iname, inum):
  48         name = self.get_iname(inum)
  49         return "        method {0}_isint = {0}.isint;".format(name)
  50
  51     def slowifdeclmux(self):
  52         return "        method Bit#(1) {1}{0}_isint;"
  53
  54