Software Overview
* read | sample |
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STEP2: | XF | = 0 |
STEP10: @CH1_ADSAMPLE = port(ADC)
STEP14: @CH2_ADSAMPLE = port(ADC) STEP3:
.if (AUTO_PWDN_ENABLE)
;clear CSTART
;read the new sample into the DSP
;read the new sample into the DSP
;wait for TW(CSTARTL)
*wait 800ns before finishing the sampling (requirment in Auto power down mode) repeat(#38)
nop |
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| ; wait for 40 clock cycles [t(APDR)=1000ns] | ||
.endif |
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STEP4: XF | = | 1 | ; wait for TW(CSTARTL) and set CSTART | ||
call | STORE |
| ; store the last sample into the table | ||
.if INT0_DRIVEN
return
.else
goto STEP5
.endif
**********************************
*STORE:
*saving the samples into memory
**********************************
STORE:
.if (SEND_OUT_PARALLEL)
*store sample into the parallel buffer location if chosen 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 isn’t 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
@ADSAMPLE = A | ; |
