Texas Instruments TMS320C6457 DSP manual Input Configuration Parameters Transfer

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9.3.1EDMA3 Programming

9.3.1.1Input Configuration Parameters Transfer

This EDMA3 transfer to the input configuration parameters is a 16-word TCPXEVT frame-synchronized transfer. The parameters should be set as:

∙OPTIONS:

–ITCCEN = 0 (Intermediate transfer complete chaining is disabled)

–TCCEN = 0 (Transfer complete chaining is disabled)

–ITCINTEN = 0 (Intermediate transfer complete interrupt is disabled)

–TCINTEN = 0 (Transfer complete interrupt is disabled)

–TCC = 1 to 63 (Transfer Complete Code)

–TCCMODE = 0 (Normal Completion)

–FWID = Don't care

–STAT = 0 (Entry is updated as normal)

–SYNCDIM = 0 (A-Sync. Each event triggers the transfer of ACNT elements.)

–DAM = 0 (Dst addressing within an array increments. Dst is not a FIFO.)

–SAM = 0 (Src addressing within an array increments. Source is not a FIFO.)

∙SOURCE ADDRESS: user input configuration parameters start address (must be double-word aligned)

∙ACNT = 64 (No of bytes in an array)

∙BCNT = 1 (No of arrays of length ACNT)

∙DESTINATION ADDRESS: TCPIC0 (5000 0000h)

∙SRCBIDX = 0 (Source 2nd Dimension Index)

∙DSTBIDX = 0 (Destination 2nd Dimension Index)

∙SRCCIDX = 0 (Source 3rd Dimension Index)

∙DSTCIDX = 0 (Destination 3rd Dimension Index)

∙CCNT = 1 (No of frames in a block)

∙BCNTRLD: Don't care

∙LINK ADDRESS: Address in the EDMA3 PaRAM of the EDMA3 parameters associated with the systematics and parities.

Upon completion, this EDMA3 transfer is linked to the EDMA3 for systematics and parities transfer parameters.

9.3.1.2Systematics and Parities Transfer

This EDMA3 transfer to the systematics and parities memory is a TCPXEVT frame-synchronized transfer. The parameters should be set as:

∙OPTIONS:

–ITCCEN = 0 (Intermediate transfer complete chaining is disabled)

–TCCEN = 0 (Transfer complete chaining is disabled)

–ITCINTEN = 0 (Intermediate transfer complete interrupt is disabled)

–TCINTEN = 0 (Transfer complete interrupt is disabled)

–TCC = 1 to 63 (Transfer Complete Code)

–TCCMODE = 0 (Normal Completion)

–FWID = Don't care

–STAT = 0 (Entry is updated as normal)

–SYNCDIM = 1 (AB-Sync. Each event triggers the transfer of BCNT arrays of ACNT elements.)

–DAM = 0 (Dst addressing within an array increments. Dst is not a FIFO.)

–SAM = 0 (Src addressing within an array increments. Source is not a FIFO.)

∙SOURCE ADDRESS: Systematics and parities start address (must be double-word aligned)

∙ACNT = 8 (No of bytes in an Array)

SPRUGK1–March 2009 TMS320C6457 Turbo-Decoder Coprocessor 2 71

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