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43 receive cppi dma state word 6 (rcppidmastatew6), 44 receive cppi completion pointer (rcppicompptr), Rcppidmastatew6) – Texas Instruments TMS320DM357 User Manual

Page 110: Descriptions, Section 4.43, Section 4.44

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4.43 Receive CPPI DMA State Word 6 (RCPPIDMASTATEW6)

4.44 Receive CPPI Completion Pointer (RCPPICOMPPTR)

Registers

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The Receive CPPI DMA State Word 6 (RCPPIDMASTATEW6) is shown in

Figure 58

and described in

Table 59

.

Figure 58. Receive CPPI DMA State Word 6 (RCPPIDMASTATEW6)

31

16

SOP_BUFFER_BYTECNT

R/W-0

15

0

CURR_BUFFER_BYTECNT

R/W-0

LEGEND: R/W = Read/Write; -n = value after reset

Table 59. Receive CPPI DMA State Word 6 (RCPPIDMASTATEW6) Field Descriptions

Bit

Field

Value

Description

31-16

SOP_BUFFER_BYTECNT

0-FFFFh

Packet Length

Indicates how many bytes are contained in the packet. This value is written into
bits 15:0 of Word 3 of the SOP Descriptor during end of packet processing.

15-0

CURR_BUFFER_BYTECNT

0-FFFFh

Current Buffer Length

Indicates how many free bytes remain in the current buffer that is being received
into

The Receive CPPI Completion Pointer (RCPPICOMPPTR) is shown in

Figure 59

and described in

Table 60

.

Figure 59. Receive CPPI Completion Pointer (RCPPICOMPPTR)

31

16

DESC_ADDR

R/W-0

15

2

1

0

DESC_ADDR

Reserved

RDBK_MODE

R/W-0

R-0

R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Table 60. Receive CPPI Completion Pointer (RCPPICOMPPTR) Field Descriptions

Bit

Field

Value

Description

31-2

DESC_ADDR

0-7FFF FFFFh

Descriptor Address

This field contains the 30-bit word aligned pointer of the end of packet descriptor that the
DMA has last processed.

1

Reserved

0

Reserved

110

Universal Serial Bus (USB) Controller

SPRUGH3 – November 2008

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