Texas Instruments TLV1562 Software Overview, if INT0DRIVEN, endif, if SENDOUTPARALLEL, SLAA040

Software Overview

STEP4: XF	= 1	; wait for TW(CSTARTL) and set CSTART
call	STORE	; store the last sample into the table
.if INT0_DRIVEN
return		; return from routine back to IRQ_INT0
.else
goto	STEP5	; go back to receive next sample
.endif

**********************************

*STORE:

*saving the samples into memory

**********************************

STORE:

.if (SEND_OUT_PARALLEL)

* store sample into the parallel buffer location if choosen

port(DAC1) = @ADSAMPLE	; update DAC output
.endif

.if SAVE_INTO_MEMORY

* store new sample into DSP data memory

*AR7+ = data(@ADSAMPLE) ; write last sample into memory table

.endif

.if SEND_OUT_SERIAL

* store sample into the serial buffer location

DP	=	#00000h	;	point	to	page zero
TC	=	bitf(@SPC,#01000h)	;	test,	is	the XRDY Bit in SPC=1?

if (TC) goto SEND_SERIAL_END ; don’t send something until XDR is empty

;this has been included because the serial DAC TLC5618A is not able to understand

;endless data-stream (the CS should not become high before end of sending

;the 16th bit)

DP	= #AD_DP	; reset Data page pointer to variables
A	= @ADSAMPLE<<2	; leftshift of the sample for a 12 bit format
@ADSAMPLE = A		;

@ADSAMPLE = #(TLC5618_LATCH_ATLC5618_FAST_MODETLC5618_POWER_UP) ; set the mode of the

DAC

data(BDXR) = @ADSAMPLE ; send out the sample to the serial DAC SEND_SERIAL_END:

.endif

.if SAVE_INTO_MEMORY

* test	for table end, set pointer	back if true
TC	= (AR0 ==AR7)	; is AR0 = AR7? (table end reached?)
if	(NTC) goto STORE_END	;

* set pointer back to table start

64SLAA040