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timvideos / HDMI2USB-litex-firmware

A version of the HDMI2USB firmware based around LiteX tools produced by @Enjoy-Digital (based on misoc+migen created by @M-Labs)
https://hdmi2usb.tv
BSD 2-Clause "Simplified" License
145 stars 71 forks source link

Instance 'OSERDESE2_18' of module 'OSERDESE2' requires 27 connections, but only 13 given #441

Open mithro opened 6 years ago

mithro commented 6 years ago

When building the Neso target, there are lots of errors like the following;

WARNING: [Synth 8-350] instance 'OSERDESE2_11' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9792]
WARNING: [Synth 8-350] instance 'OSERDESE2_12' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9814]
WARNING: [Synth 8-350] instance 'OSERDESE2_13' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9836]
WARNING: [Synth 8-350] instance 'OSERDESE2_14' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9858]
WARNING: [Synth 8-350] instance 'OSERDESE2_15' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9880]
WARNING: [Synth 8-350] instance 'OSERDESE2_16' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9902]
WARNING: [Synth 8-350] instance 'OSERDESE2_17' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9924]
WARNING: [Synth 8-350] instance 'OSERDESE2_18' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9946]
WARNING: [Synth 8-350] instance 'OSERDESE2_19' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9968]
WARNING: [Synth 8-350] instance 'OSERDESE2_20' of module 'OSERDESE2' requires 27 connections, but only 13 given [/home/travis/build/timvideos/HDMI2USB-litex-firmware/build/neso_base_lm32/gateware/top.v:9990]

See the following log - https://travis-ci.org/timvideos/HDMI2USB-litex-firmware/jobs/381124371

enjoy-digital commented 6 years ago

With our configuration, some inputs/ouputs of OSERDESE2 are not used and we are not connecting them in the instance. (TBYTEIN, SHIFTINX, SHIFTOUTX, etc....) We can safely ignore these warnings.

mithro commented 6 years ago

@enjoy-digital Should these extra inputs/outputs be tied to zero / one or something?

enjoy-digital commented 6 years ago

Vivado/ISE are already doing that for us. We are using this same principle on lots of instances, so my reasoning is that wether we fix that on all instances or we keep things like this. From a designer perspective i found easier to keep things like that and i'm not sure we really had issue in the past with this.