Analog Devices ADSP-21261 SHARC Hardware Reference Manual page 430

SPORT Programming Examples
#define BUFSIZE 10
.SECTION/DM seg_dmda;
/* Transmit Buffer */
.var tx_buf2a[BUFSIZE] = 0x11111111,
/* Receive Buffer */
.var rx_buf3a[BUFSIZE];
/* Main code section */
.global _main;
.SECTION/PM seg_pmco;
_main:
bit set mode1 CBUFEN;
/* SPORT Loopback: Use SPORT2 as RX & SPORT3 as TX.
For no loopback (TDM mode), program MTaCSb
[a=0,2,4 & b=0,1,2,3] and MRcCSd [a=1,3,5 & b=0,1,2,3], /*
/* Initially clear SPORT control registers */
r0 = 0x00000000;
dm(SPCTL2) = r0;
dm(SPCTL3) = r0;
dm(SPMCTL23) = r0;
/* Set up DAG registers */
9-80
0x22222222,
0x33333333,
0x44444444,
0x55555555,
0x66666666,
0x77777777,
0x88888888,
0x99999999,
0xAAAAAAAA;
/* enable circular buffers
ADSP-2126x SHARC Processor Hardware Reference
*/