Code Location

When designing a system there is a choice as to which hardware resources to use for each interface. In a multi-tile system the codebase needs to be informed as to which tiles to use for these hardware resources and associated code.

A series of defines are used to allow the programmer to easily move code between tiles. Arguably the most important of these are XUA_AUDIO_IO_TILE_NUM and XUA_XUD_TILE_NUM. Table 7 shows a full listing of these TILE defines.

Note

If not explicitly defined by user, tile numbers will be derived from the application XN file PORT defines. In general this is the recommended approach.

Table 7 Tile defines

Define	Description	Default
XUA_AUDIO_IO_TILE_NUM	Tile on which I2S/TDM, ADAT Rx, S/PDIF Rx & mixer resides	Derived from related port defines in the application XN file
XUA_XUD_TILE_NUM	Tile on which USB resides, including buffering for all USB interfaces/endppoints	0
XUA_MIDI_TILE_NUM	Tile on which MIDI resides	Derived from MIDI related port defines in the application XN file
XUA_SPDIF_TX_TILE_NUM	Tile on which S/PDIF Tx resides	Derived from PORT_SPDIF_OUT port define in the application XN file
XUA_MIC_PDM_TILE_NUM	Tile on which PDM microphones resides	Derived from Mic related port defines in the application XN file
XUA_PLL_REF_TILE_NUM	Tile on which reference signal to CS2100 resides	Derived from PORT_PLL_REF port define in the application XN file

Note

It should be ensured that the relevant port defines in the application XN file match the code location defines