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Texas Instruments TMS320C645X User Manual

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Descriptor

Descriptor

Buffer

Buffer

Port Rx DMA

State

Rx Queue Head Descriptor

Pointer

SRIO Functional Description

Figure 24. RX Buffer Descriptor

TX Buffer Descriptor

TX_DESCP0_0->TXDESC0 =

CSL_FMK( SRIO_TXDESC0_N_POINTER,(int )TX_DESCP0_1 );

//link to TX_DESCP0_1

//NDP

TX_DESCP0_0->TXDESC1 =

CSL_FMK( SRIO_TXDESC1_B_POINTER,(int )&xmtBuff1[0] );

//Buffer Pointer

TX_DESCP0_0->TXDESC2 =

CSL_FMK( SRIO_TXDESC2_DESTID, 0xBEEF)|

CSL_FMK( SRIO_TXDESC2_PRI, 1)|

CSL_FMK( SRIO_TXDESC2_TT, 1)|

CSL_FMK( SRIO_TXDESC2_PORTID, 3)|

CSL_FMK( SRIO_TXDESC2_SSIZE, SSIZE_256B)|

CSL_FMK( SRIO_TXDESC2_MAILBOX, 0);

TX_DESCP0_0->TXDESC3 =

CSL_FMK( SRIO_TXDESC3_SOP,1 )|

CSL_FMK( SRIO_TXDESC3_EOP,1 )|

CSL_FMK( SRIO_TXDESC3_OWNERSHIP,1 )|

CSL_FMK( SRIO_TXDESC3_EOQ,1 )|

CSL_FMK( SRIO_TXDESC3_TEARDOWN,0 )|

CSL_FMK( SRIO_TXDESC3_RETRY_COUNT,0 )|

CSL_FMK( SRIO_TXDESC3_CC,0 )|

CSL_FMK( SRIO_TXDESC3_MESSAGE_LENGTH,MLEN_512DW );

TX_DESCP0_1->TXDESC0 =

CSL_FMK( SRIO_TXDESC0_N_POINTER, 0);

//end of message

//poll mode, extended address type 2,5,6

TX_DESCP0_1->TXDESC1 =

CSL_FMK( SRIO_TXDESC1_B_POINTER,(int )&xmtBuff2[0] );

//32bit = type 2,5,6. 24bit = type 8

TX_DESCP0_1->TXDESC2 =

CSL_FMK( SRIO_TXDESC2_DESTID, 0xBEEF)|

CSL_FMK( SRIO_TXDESC2_PRI, 1)|

CSL_FMK( SRIO_TXDESC2_TT, 1)|

CSL_FMK( SRIO_TXDESC2_PORTID, 3)|

CSL_FMK( SRIO_TXDESC2_SSIZE, SSIZE_256B)|

CSL_FMK( SRIO_TXDESC2_MAILBOX, 1);

TX_DESCP0_1->TXDESC3 =

CSL_FMK( SRIO_TXDESC3_SOP,1 )|

CSL_FMK( SRIO_TXDESC3_EOP,1 )|

CSL_FMK( SRIO_TXDESC3_OWNERSHIP,1 )|

CSL_FMK( SRIO_TXDESC3_EOQ,1 )|

CSL_FMK( SRIO_TXDESC3_TEARDOWN,0 )|

CSL_FMK( SRIO_TXDESC3_RETRY_COUNT,0 )|

CSL_FMK( SRIO_TXDESC3_CC,0 )|

CSL_FMK( SRIO_TXDESC3_MESSAGE_LENGTH,MLEN_512DW );

SPRU976 – March 2006

Serial RapidIO (SRIO)

57

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