Analog Devices SHARC ADSP-21368 Hardware Reference Manual page 372

SPORT Programming Examples
SLEN32|
FSR|
SDEN_A|
SCHEN_A;
dm(SPCTL0) = ustat3;
/* Next TCB location for tx_tcb2 is tx_tcb1 */
/* Mask the first 19 bits of the TCB location */
r0 = (tx_tcb1 + 3) & 0x7FFFF;
dm(tx_tcb2) = r0;
/* Next TCB location for rx_tcb2 is rx_tcb1 */
/* Mask the first 19 bits of the TCB location */
r0 = (rx_tcb1 + 3) & 0x7FFFF;
dm(rx_tcb2) = r0;
/* Next TCB location for rx_tcb1 is rx_tcb2 */
/* Mask the first 19 bits of the TCB location */
r0 = (rx_tcb2 + 3) & 0x7FFFF;
dm(rx_tcb1) = r0;
/* Initialize SPORT DMA transfer by writing to the CP reg */
dm(CPSP0A) = r0;
/* Next TCB location for tx_tcb1 is tx_tcb2 */
/* Mask the first 19 bits of the TCB location */
r0 = (tx_tcb2 + 3) & 0x7FFFF;
dm(tx_tcb1) = r0;
/* Initialize SPORT DMA transfer by writing to the CP reg */
dm(CPSP1A) = r0;
_main.end: jump (pc,0);
5-92
/* 32-bit word length */
/* Frame Sync Required */
/* Enable Channel A DMA */
/* Enable Channel A DMA Chaining */
ADSP-21368 SHARC Processor Hardware Reference