spinal.lib.bus.amba3.apb.Apb3Router.scala Maven / Gradle / Ivy
/* *\
** _____ ____ _____ _____ __ **
** / ___// __ \/ _/ | / / | / / HDL Lib **
** \__ \/ /_/ // // |/ / /| | / / (c) Dolu, All rights reserved **
** ___/ / ____// // /| / ___ |/ /___ **
** /____/_/ /___/_/ |_/_/ |_/_____/ MIT Licence **
** **
** Permission is hereby granted, free of charge, to any person obtaining a **
** copy of this software and associated documentation files (the "Software"),**
** to deal in the Software without restriction, including without limitation **
** the rights to use, copy, modify, merge, publish, distribute, sublicense, **
** and/or sell copies of the Software, and to permit persons to whom the **
** Software is furnished to do so, subject to the following conditions: **
** **
** The above copyright notice and this permission notice shall be included **
** in all copies or substantial portions of the Software. **
** **
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS **
** OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF **
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. **
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY **
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT **
** OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR **
** THE USE OR OTHER DEALINGS IN THE SOFTWARE. **
\* */
package spinal.lib.bus.amba3.apb
import spinal.core._
import spinal.lib._
object Apb3Router{
def getOutputConfig(inputConfig: Apb3Config) = inputConfig.copy(selWidth = 1)
}
class Apb3Router(inputConfig: Apb3Config) extends Component {
import Apb3Router._
val io = new Bundle{
val input = slave(Apb3(inputConfig))
val outputs = Vec(master(Apb3(getOutputConfig(inputConfig))), inputConfig.selWidth)
}
for((output,index) <- io.outputs.zipWithIndex){
output.PADDR := io.input.PADDR
output.PENABLE := io.input.PENABLE
output.PSEL(0) := io.input.PSEL(index)
output.PWRITE := io.input.PWRITE
output.PWDATA := io.input.PWDATA
}
val selIndex = RegNext(OHToUInt(io.input.PSEL))
io.input.PREADY := io.outputs(selIndex).PREADY
io.input.PRDATA := io.outputs(selIndex).PRDATA
if(inputConfig.useSlaveError) io.input.PSLVERROR := io.outputs(selIndex).PSLVERROR
}