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IXP400 Software
Access-Layer Components: HSS-Access (IxHssAcc) API
April 2005 IXP400 Software Version 2.0 Programmer’s Guide
198 Document Number: 252539, Revision: 007
• IxHssAccTdmSlotUsage *tdmMap — A pointer to an array defining the HSS time-slot
assignment types.
• IxHssAccLastErrorCallback lastHssErrorCallback — Client callback to report the last error.
The parameter IxHssAccConfigParams has two structures of type IxHssAccPortConfig — one for
HSS Tx and one for HSS Rx. These structures are used to choose:
• Frame-synchronize the pulse type (Tx/Rx)
• Determine how the frame sync pulse is to be used (Tx/Rx)
• Frame-synchronize the clock edge type (Tx/Rx)
• Determine the data clock edge type (Tx/Rx)
• Determine the clock direction (Tx/Rx)
• Determine whether or not to use the frame sync pulse (Tx/Rx)
• Determine the data rate in relation to the clock (Tx/Rx)
• Determine the data polarity type (Tx/Rx)
• Determine the data endianness (Tx/Rx)
• Determine the Tx pin open drain mode (Tx)
• Determine the start of frame types (Tx/Rx)
• Determine whether or not to drive the data pins (Tx)
• Determine the how to drive the data pins for voice56k type (Tx)
• Determine the how to drive the data pins for unassigned type (Tx)
• Determine the how to drive the Fbit (Tx)
• Set 56Kbps data endianness, when using the 56Kbps type (Tx)
• Set 56Kbps data transmission type, when using the 56Kbps type (Tx)
• Set the frame-pulse offset in bits w.r.t, for the first time slot (0-1,023) (Tx/Rx)
• Determine the frame size in bits (1-1,024)
IxHssAccConfigParams also has the following parameters:
• The number of channelized time slots (0 - 32)
• The number of packetized clients (0 - 4)
• The byte to be transmitted on channelized service, when there is no client data to Tx
• The HSS coprocessor loop-back state
• The data to be transmitted on packetized service, when there is no client data to Tx
• The HSS clock speed