Texas Instruments TLV1562 Software Overview, if SENDOUTSERIAL, endif, if R8BITRESOLUT, SLAA040

Software Overview

data(data_loc_A) = @TEMP	; fill memory table 1
repeat(#num_data_B–1)
data(data_loc_B) = @TEMP	; fill memory table 2
repeat(#num_data_C–1)
data(data_loc_C) = @TEMP	; fill memory table 3
repeat(#num_data_D–1)
data(data_loc_D) = @TEMP	; fill memory table 4

.if SEND_OUT_SERIAL

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

*SERIAL_DAC_INI:

*initialize the serial interface to send out the samples for the serial DAC

*set up the serial interface for a DSP–DAC (5618A) conversation

*initialize the SPI interface and the DAC

*the serial interface will be updated with the last sample if the serial

*buffer is empty (after the last bit has been send)

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

SERIAL_DAC_INI: BSPI_INI:

DP	= #0
@BSPC	= #00038h	; reset SPI
@BSPCE	= #00101h	; set clock speed, no Autobuffer Mode
@BSPC	= #0C078h	; start serial port

.endif

*enable global interrupt (this is even required, if no IRQ routine is used

*by this program because the GoDSP debugger needs to do its backgroud interrupts)

INTM	= 0	; enable global IRQ
* initialize storage table for the ADC samples
AR7	= #(data_loc_A)	; point to first date location of the storage table
AR0	= #(num_data_A+data_loc_A)	; AR0 points to table end
DP	= #AD_DP	;
@ADCOUNT= #(num_data_A)		; initialize ADCOUNT with the number of required samples
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 = #(CH1MONO_CONTINUOUSSINGLE_ENDCLK_INTERNALNO_CALIB_OP);

@CR1_SEND = #(NO_SW_PWDNNO_AUTO_PWDNNO_2COMPLEMENTNO_DEBUGRES_10_BITRD_CONV_START);

*change some of the possible modes by variation of the bit setting in the file header

*this next step can be erased, if the user is running in only one special configuration

.if (R8BIT_RESOLUT)

@CR1_SEND ^= #RES_10_BIT	; clear bit for 10–Bit Resolution
@CR1_SEND = #RES_8_BIT	; set 8–Bit conversion mode
.elseif (R4BIT_RESOLUT)
@CR1_SEND ^= #RES_10_BIT	; clear bit for 10–Bit Resolution

76SLAA040