src/bsv/peripheral_gen/spi.py

   1 from bsv.peripheral_gen.base import PBase
   2
   3
   4 class spi(PBase):
   5
   6     def slowimport(self):
   7         return "    import qspi              :: *;"
   8
   9     def slowifdecl(self):
  10         return "            interface QSPI_out spi{0}_out;\n" + \
  11                "            method Bit#(1) spi{0}_isint;"
  12
  13     def num_axi_regs32(self):
  14         return 13
  15
  16     def mkslow_peripheral(self):
  17         return "        Ifc_qspi spi{0} <-  mkqspi();"
  18
  19     def _mk_connection(self, name=None, count=0):
  20         return "spi{0}.slave"
  21
  22     def pinname_out(self, pname):
  23         return {'clk': 'out.clk_o',
  24                 'nss': 'out.ncs_o',
  25                 'mosi': 'out.io_o[0]',
  26                 'miso': 'out.io_o[1]',
  27                 }.get(pname, '')
  28
  29     def pinname_outen(self, pname):
  30         return {'clk': 1,
  31                 'nss': 1,
  32                 'mosi': 'out.io_enable[0]',
  33                 'miso': 'out.io_enable[1]',
  34                 }.get(pname, '')
  35
  36     def mk_pincon(self, name, count):
  37         ret = [PBase.mk_pincon(self, name, count)]
  38         # special-case for gpio in, store in a temporary vector
  39         plen = len(self.peripheral.pinspecs)
  40         ret.append("    // XXX NSS and CLK are hard-coded master")
  41         ret.append("    // TODO: must add spi slave-mode")
  42         ret.append("    // all ins done in one rule from 4-bitfield")
  43         ret.append("    rule con_%s%d_io_in;" % (name, count))
  44         ret.append("       {0}{1}.out.io_i({{".format(name, count))
  45         for idx, pname in enumerate(['mosi', 'miso']):
  46             sname = self.peripheral.pname(pname).format(count)
  47             ps = "pinmux.peripheral_side.%s_in" % sname
  48             ret.append("            {0},".format(ps))
  49         ret.append("            1'b0,1'b0")
  50         ret.append("        });")
  51         ret.append("    endrule")
  52         return '\n'.join(ret)
  53
  54     def mk_ext_ifacedef(self, iname, inum):
  55         name = self.get_iname(inum)
  56         return "        method {0}_isint = {0}.interrupts[5];".format(name)
  57
  58     def slowifdeclmux(self):
  59         return "        method Bit#(1) {1}{0}_isint;"