Software Overview
@SWWSR | = | #07000h | ; one I/O wait states |
DP | = | #AD_DP | ; |
*******************************************
*ADC_dual_con_Start:
*read samples and store them into memory
*******************************************
ADC_dual_con_Start:
repeat(#12) |
|
NOP | ; wait for t(SAMPLES) (450ns) |
STEP6: @CH1_ADSAMPLE = port(ADC) | ; read the new sample into the DSP |
STEP7: repeat(#20) |
|
NOP | ; wait for t(CONV1) (about 800ns) |
STEP10: @CH2_ADSAMPLE = port(ADC); read the new sample into the DSP
*IMPORTANT:
*to achive maximum throughput related to the delay of the store instructions STEP11: repeat(#7)
NOP | ; wait for t(CONV1) (about 800ns) |
STEP12: call STORE | ; store the last sample into the table |
goto STEP6 | ; go back to receive next sample |
**********************************
*STORE:
*saving the samples into memory
**********************************
STORE:
.if (SEND_OUT_PARALLEL)
* store sample into the parallel buffer location if choosen port(DAC1) = @CH1_ADSAMPLE ; update DAC output with sample one
.endif
.if SAVE_INTO_MEMORY
* store new sample into DSP data memory
*AR7+ = data(@CH1_ADSAMPLE) ; write last sample of channel 1 into memory table *AR6+ = data(@CH2_ADSAMPLE) ; write last sample of channel 2 into memory table
.endif
.if SEND_OUT_SERIAL
* store sample into the serial buffer location
DP | = | #00000h | ; | point | to | page zero |
TC | = | bitf(@SPC,#01000h) | ; | test, | is | the XRDY Bit in SPC=1? |
if (TC) goto SEND_SERIAL_END ; don’t send something until XDR is empty
;this has been included because the serial DAC TLC5618A is not able to understand
;endless
;the 16th bit)
DP = #AD_DP | ; reset Data page pointer to variables |
A= @ADSAMPLE<<2 ; leftshift of the sample for a 12 bit format
