Texas Instruments TLV1562 manual Software Overview, elseif NOINT0SIG

Software Overview

.elseif NO_INT0_SIG

*instead of using the INT signal, the processor waits

*for 6ADCSYSCLK+49ns and reads then the sample repeat(#32)

nop		; wait for 34 processor cycles
.endif
* read sample
STEP7: @ADSAMPLE = port(ADC)		; read the new sample into the DSP
XF	= 1	; set RD

.if (SEND_OUT_PARALLEL)

* store sample into the parallel buffer location if choosen

port(DAC1) = @ADSAMPLE	; update DAC output
@TEMP = port(ADC)	; activate ADC CS again
.endif

.if (AUTO_PWDN)

*deselect/select the ADC with CS (requirment in Auto power down mode) @TEMP = port(DEACTIVE) ; deselect ADC

@TEMP = port(ADC)	; activate ADC CS again
repeat(#18)
nop	; wait for 20 clock cycles [t(APDR)=500ns]

.endif

XF	= 0	; clear RD (step 4)
call	STORE	; handle storing of the samples into memory and serail DAC
.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 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

Interfacing the TLV1562 Parallel ADC to the TMS320C54x DSP 51