F28-F29 Software Migration Guide  1.00.00.00
X-BAR

Table of Contents

The XBAR architecture of in the F28 device and F29x devices are different.

  • Input XBAR
    • 64 configurable INPUT instances as opposed to 16 in F28 devices
    • INPUTxSELECT registers are updated to register array format
  • CLB Input XBAR
    • There is no dedicated CLB input XBAR. Input XBAR itself can be used
  • Output XBAR
    • 16 OUTPUT instances as opposed to 8 in F28 devices
    • No group mux configuration. Each of the OUTPUT instance can be OR of available inputs
    • Output Flags Module
      • It is instantiated once per every OUTPUT instance and supports the function of latching the output and clear/force functions.
  • CLB Output X-BAR
    • There is no dedicated CLB output XBAR. Output XBAR itself can be used
  • CLB X-BAR
    • 8 instances , similar to F28 devices
    • No group Mux configuration. Each of the OUTPUT instance can be OR of available inputs
  • ePWM X-BAR
    • 16 instances (No of instances varies across F28 devices)
    • No group mux configuration. Each of the OUTPUT instance can be OR of available inputs
  • MINDB X-BAR
    • 16 instances, similar to F28 devices
  • ICL X-BAR
    • 16 instances, similar to F28 devices

Driverlib enum mapping

F28 enum F29 enum Comments
XBAR_OutputMuxConfig XBAR_OutputXbarInputSource List of input sources to the OUTPUT X-BAR. Passed as source parameter to XBAR_selectOutputXbarInputSource()
XBAR_EPWMMuxConfig XBAR_EpwmXbarInputSource List of input sources to the EPWM X-BAR. Passed as source parameter to XBAR_selectEpwmXbarInputSource()
XBAR_CLBMuxConfig XBAR_ClbXbarInputSource List of input sources to the OUTPUT X-BAR. Passed as source parameter to XBAR_selectClbXbarInputSource()
XBAR_InputSignal XBAR_MindbXbarInputSource Separate enum that list the input sources to MINDB X-BAR. Passed as source parameter to XBAR_selectMindbXbarInputSource()
XBAR_InputSignal XBAR_IclXbarInputSource Separate enum that list the input sources to ICL X-BAR. Passed as source parameter to XBAR_selectIclXbarInputSource()

Driverlib API mapping

F28 Function F29 Function Comments
XBAR_setOutputMuxConfig XBAR_selectOutputXbarInputSource OUTPUT X-BAR architecture does not require mux selection. Any number of input sources to the OUTPUT X-BAR can be enabled and these multiple sources are combined using OR gate
XBAR_enableOutputMux
XBAR_disableOutputMux
XBAR_setEPWMMuxConfig XBAR_selectEpwmXbarInputSource EPWM X-BAR architecture does not require mux selection. Any number of input sources to the EPWM X-BAR can be enabled and these multiple sources are combined using OR gate.
XBAR_enableEPWMMux
XBAR_disableEPWMMux
XBAR_setCLBMuxConfig XBAR_selectClbXbarInputSource CLB X-BAR architecture does not require mux selection. Any number of input sources to the CLB X-BAR can be enabled and these multiple sources are combined using OR gate.
XBAR_enableCLBMux
XBAR_disableCLBMux
XBAR_invertOutputSignal XBAR_invertOutputSignal Single API to invert the output signal from OUTPUT/ EPWM/ MINDB/ ICL/ CLB X-BAR.
XBAR_invertEPWMSignal
XBAR_invertCLBSignal
XBAR_setInputSignal XBAR_selectMindbXbarInputSource Individual APIs to select the input sources rather than XBAR_setInputSignal that selects a single input signal for MINDB or ICL X-BAR.
XBAR_selectIclXbarInputSource
XBAR_lockInput XBAR_lockInput F28 function locks the inputs to INPUT X-BAR, MINDB X-BAR, ICL X-BAR AND CLBINPUT X-BAR, while in F29, it can be used to lock the inputs to INPUT X-BAR only.
XBAR_lockOutput XBAR_lockConfiguration Single API to lock the configuration of OUTPUT/ EPWM/ MINDB/ ICL/ CLB X-BAR depending on the base address passed.
XBAR_lockEPWM
XBAR_getOutputLatchStatus XBAR_getOutputLatchStatus Input param base should be OUTPUTXBAR1_FLAGS_BASE instead of OUTPUTXBAR_BASE
XBAR_clearOutputLatch XBAR_clearOutputLatch
XBAR_forceOutputLatch XBAR_forceOutputLatch

Few functions added in F29 XBAR driverlib:

  • XBAR_invertOutputSignalBeforeLatch
  • XBAR_selectOutputStretchSource
  • XBAR_selectOutputStretchLength
  • XBAR_getOutputSignalStatus