Texas Instruments TLV1562 User Manual
Page 88
Software Overview
82
SLAA040
repeat(#num_data_A–1)
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 sent)
******************************************************************************
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 = #(CH1|MONO_CONTINUOUS|SINGLE_END|CLK_INTERNAL|NO_CALIB_OP);
@CR1_SEND = #(NO_SW_PWDN|NO_AUTO_PWDN|NO_2COMPLEMENT|NO_DEBUG|RES_10_BIT|RD_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)