We are writing a code for interrupts wit ADC. The ADC's Outputs from the result zero cannot be moved to ant DMA location( we are moving to predefined variables in DP100h).
Here is the code we have a problem with.
GISR2: <--------------------------------------------ISR Starts Here. Go Down To View the problematic part
LDP #0h
SETC INTM ;disable all interrupts
SETC SXM
SETC OVM
CLRC SXM
CLRC OVM
CLRC CNF ;clear cnf bit
LDP #0e8h ;load dp to event manager page
SPLK #0FFFh,EVAIFRA ;clear eventmanager interrupts
SETC XF ;set XF flag
LDP #0E1h ;set data page to adc
SPLK #04000h,ADCTRL2 ;RESET ADC
SPLK #02000h,ADCTRL2 ; Start the conversions
CHK_EOS1:
LACC ADCTRL2 ; Wait for SEQ1 Busy bit to clear
AND #0001000000000000b ; BIT12 is loaded into TC bit of ST1
BCND CHK_EOS1,NEQ ; If TC=1, keep looping.
LACC RESULT0 ; Load conversion result of Channel 1
; from Ch1 buffer register into ACC
CLRC SXM
NOP ; enabling logic shifts of the accumulator.
RPT #5 ; Repeat the following instruction 6 times
SFR
NOP
AND #3FFh
NOP ; Shift right (6 times since ADC is 10-bit)
LDP #100h
SACL ADC_OUT <<<<<<<-------------------------------------------------------- A Predefined variable. Which is not updating according to Result0 even when ADC input
<<<<<<<-----------------(cont) is updating Result0 in the ISR.
CLRC INTM ;enable the interrupts
CLRC XF
RET
