![background image](http://html.mh-extra.com/html/analog-devices/adsp-21261-sharc/adsp-21261-sharc_hardware-reference-manual_2939675427.webp)
ADSP-2126x SHARC Processor Hardware Reference
9-77
Serial Ports
/* RX Transfer Control Blocks */
.var rx_tcb1[4] = 0,BUFSIZE,1,rx_buf0a;
.var rx_tcb2[4] = 0,BUFSIZE,1,rx_buf0b;
/* Main code section */
.global _main;
.SECTION/PM seg_pmco;
_main:
/* SPORT loopback: use SPORT0 as RX and SPORT1 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 register */
r0 = 0x00000000;
dm(SPCTL0) = r0;
dm(SPCTL1) = r0;
dm(SPMCTL01) = r0;
SPORT_DMA_setup:
/* set internal loopback bit for SPORT0 & SPORT1 */
bit set ustat3 SPL;
dm(SPMCTL01) = ustat3;
/* Configure SPORT1 as a transmitter */
/* internally generating clock and frame sync */
/* CLKDIV = [fCCLK(200 MHz)/4xFSCLK(20 MHz)]-1 = 0x004 */
/* FSDIV = [FSCLK(20 MHz)/TFS(.625 MHz)]-1 = 31 = 0x001F */
R0 = 0x001F0004;
dm(DIV1) = R0;
ustat4 = SPEN_A|
/* Enable Channel A */
SLEN32|
/* 32-bit word length */
FSR|
/* Frame Sync Required */
SPTRAN|
/* Transmit on enabled channels */
SDEN_A|
/* Enable Channel A DMA */
Содержание ADSP-21261 SHARC
Страница 30: ...Contents xxx ADSP 2126x SHARC Processor Hardware Reference ...
Страница 40: ...Register Diagram Conventions xl ADSP 2126x SHARC Processor Hardware Reference ...
Страница 58: ...Differences From Previous SHARCs 1 18 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 112: ...Secondary Processing Element PEy 2 54 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 178: ...Summary 3 66 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 204: ...DAG Instruction Summary 4 26 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 322: ...Setting Up DMA 7 32 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 436: ...SPORT Programming Examples 9 86 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 521: ...ADSP 2126x SHARC Processor Hardware Reference 11 31 Input Data Port rts IDP_ISR end ...
Страница 522: ...Input Data Port Programming Example 11 32 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 590: ...Timer Programming Examples 14 20 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 796: ...I O Processor Registers A 174 ADSP 2126x SHARC Processor Hardware Reference ...
Страница 800: ...B 4 ADSP 2126x SHARC Processor Core Manual ...
Страница 846: ...Index I 36 ADSP 2126x SHARC Processor Hardware Reference ...