Analog Devices ADSP-2106x SHARC User Manual page 354

9 Link Ports
r0=destination_2;
dm(II5)=r0; /* Set DMA rx index to start of dest buffer
r0=1;
dm(IM5)=r0; /* Set modify to 1
r0=@destination_2;
dm(C5)=r1; /* real DMA Rx size should be got from master
r0=0x00003000; /* LCTL Register:32-bit data,
dm(LCTL)=r0; /* enable DMA on LBUF3
/* This will start off the DMA transfer
/* Always write LCTL after LAR
bit clr irptl LP3I;
bit set imask LP3I;
rti;
/*_______________Start of Original Slave Routine________________________*/
start_as_slave:
r0=destination_1;
dm(II4)=r0; /* Set DMA rx index to start of dest buffer
r0=1;
dm(IM4)=r0; /* Set DMA modify (stride) to 1
r0=@destination_1;
dm(C4)=r0; /* real DMA Rx size should be from master */
r0=0xc000; /* LCOM Register: 2x rate,
dm(LCOM)=r0; /* note:use r0=0x10000 on rev. 0.X silicon
/* original :
r0=0x3fe3f; /* LAR Register:
dm(LAR)=r0; /* All others inactive
Listing 9.3 Link Token Passing Example (continues)
9 – 44
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*/
/* clear pending Link buffer 3 interrupt.
/* Enable Link buffer 3 interrupt
0x0000c000 */
LBUF2->port 0
*/
*/
*/
LBUF3=Rx */
*/
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