Texas Instruments TLV1562 manual Software Overview, SLAA040

Software Overview

* initialize storage table for the ADC samples

DP	=	#AD_DP	;
A	+=	#–1	; decrement A
@CH_NO		= A	; read number of sampling channel
A	= @ADMEM
AR7	= A		; point to first date location of the storage table
A	= @ADCOUNT		; AR0 points to table end

B= @ADMEM A += B

AR0	= A	; AR0 is loaded with last save location
AR5	= #(IFR)	; AR5 points to the IFR register (only for polling mode)
DP	= #AD_DP
@ZERO	= #00000	; set the dummy send value

*initialize the send values to set–up the two programmable register of the ADC @CR0_SEND = #(MONO_INTSINGLE_ENDCLK_INTERNALNO_CALIB_OP);

A = @CR0_SEND

A = @CH_NO @CR0_SEND = A

@CR1_SEND = #(NO_SW_PWDNNO_AUTO_PWDNNO_2COMPLEMENTNO_DEBUGRES_10_BITCST_CONV_START);

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

*ADC_INI:

*set ADC register CR0/CR1

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

ADC_INI:

*write CR1 (to reset old CSTART mode initialization, because otherwise, the ADC never sets

*back its int– pin to show a sample is available:

@CR_PROBLEM = #(SW_PWDNNO_AUTO_PWDNNO_2COMPLEMENTNO_DEBUGRES_10_BITRD_CONV_START);

port(ADC) = @CR_PROBLEM		; Address	decoder sets CS low,
		; WR– low	and send CR_PROBLEM value to the ADC
NOP		; wait for tW(CSH)=50ns
* write CR1:
port(ADC) = @CR1_SEND		; Address decoder sets CS low,
		; WR– low and send CR1 value to the ADC
port(DEACTIVE) = @ZERO		; deselect ADC (CS high)
NOP		; wait for tW(CSH)=50ns
* write CR0
port(ADC) = @CR0_SEND		; send CR0 value to the ADC
STEP1: port(DEACTIVE) = @ZERO		; deselect ADC (CS high)
NOP	;

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

*ADC_mono_IRQ_Start:

*read samples and store them into memory

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

88SLAA040