Texas Instruments TLV1562 manual Software Overview, = bit*AR5,15-0, AR7+ = data@ADSAMPLE

Software Overview

ADC_mono_IRQ_Start:
ISTEP2: XF	= 0	; clear CSTART
ISTEP3: NOP
NOP
NOP		; wait for TW(CSTARTL)
ISTEP4: XF	= 1	; set CSTART
STEP5:
* wait until INT– goes low in polling the INT0 pin:
M1: TC	= bit(*AR5,15–0)	; test, is the INT0 Bit in IFR=1?
if (NTC) goto M1		; wait until INT– signal went high
IFR	= #1	; reset any old interrupt on pin INT0
* read sample
STEP2: XF	= 0	; clear CSTART
STEP10: @ADSAMPLE = port(ADC) ; read the new sample into the DSP
STEP4: XF	= 1	; wait for TW(CSTARTL) and set CSTART

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

*STORE:

*saving the samples into memory

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

STORE:

*store new sample into DSP data memory

*AR7+ = data(@ADSAMPLE)			; write	last sample into memory table
* test for table end, set pointer back				if true
TC	= (AR0 ==AR7)		; is AR0 = AR7? (table end reached?)
if (NTC) goto STORE_END			;
* finish conversion
CPL	= #1		; do stack pointer addressing
AR7	= pop()		; restore AR7
AR6	= pop()		; restore AR6
A	= #0	; clear ACCU
RETURN		; jump back to C–layer
STORE_END:
goto	STEP5	; go back to receive next sample

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*IRQ_INT0:

*Interrupt routine of the external interrupt input pin INT0

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

IRQ_INT0:

return_enable ; return from IRQ (wake up from the IDLE mode)

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

*BXINT0:

*Interrupt routine of the serial transmit interrupt of the buffered SPI

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

Interfacing the TLV1562 Parallel ADC to the TMS320C54x DSP 89