src/main/scala/devices/i2c/I2CPins.scala

   1 // See LICENSE for license details.
   2 package sifive.blocks.devices.i2c
   3
   4 import Chisel._
   5 import sifive.blocks.devices.gpio.{GPIOPin, GPIOOutputPinCtrl}
   6 import sifive.blocks.util.ShiftRegisterInit
   7
   8
   9 class I2CPinsIO extends Bundle {
  10   val scl = new GPIOPin
  11   val sda = new GPIOPin
  12 }
  13
  14 class I2CGPIOPort(syncStages: Int = 0) extends Module {
  15   val io = new Bundle{
  16     val i2c = new I2CPort().flip()
  17     val pins = new I2CPinsIO
  18   }
  19
  20   GPIOOutputPinCtrl(io.pins.scl, io.i2c.scl.out, pue=true.B, ie = true.B)
  21   io.pins.scl.o.oe := io.i2c.scl.oe
  22   io.i2c.scl.in := ShiftRegisterInit(io.pins.scl.i.ival, syncStages, Bool(true))
  23
  24   GPIOOutputPinCtrl(io.pins.sda, io.i2c.sda.out, pue=true.B, ie = true.B)
  25   io.pins.sda.o.oe := io.i2c.sda.oe
  26   io.i2c.sda.in := ShiftRegisterInit(io.pins.sda.i.ival, syncStages, Bool(true))
  27 }