;-----------------------------------------------------------------------------------------------; ; Program: Expressionmate (Kurzweil) ; ; Developed by David J. Brown ; ; Copyright (c) April 13, 2004 David J. Brown ; ; Email: davebr@earthlink.net ; ; Web site: http://modularsynthesis.com ; ;-----------------------------------------------------------------------------------------------; ; LICENSE AGREEMENT: ; ; This program is free software. You can redistribute it and/or modify it. ; ; ; ; This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, ; ; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. ; ;-----------------------------------------------------------------------------------------------; ; ; Description: ; ; This program converts the Kurzweil Expressionmate ; midi stream into cv and inverse cv (e.g. ribbon ; direction). Middle ribbon position is +5 volt cv. ; Midi channel is ignored on input. ; ; Note on and note off midi commands are passed through ; to midi out and also converted to cv, trigger, and gate. ; ; inputs: ; start = ; stop = ; in-1 = ; in-2 = ; in-3 = ; in-4 = ; midi-in = Expressionmate midi out ; ; outputs: ; out-1 = midi note cv (last note priority) ; out-2 = midi pitchbend cv ; out-3 = inverse midi pitchbend cv ; out-4 = gate out (+5 volts) ; aux = trigger (5 mS) ; midi-out= midi through for note on and note off ; speakjet= voice output ; ; run led = toggles @ 0.5 S if timer interrupts enabled ; stop led = flashes for midi received ; ; written by David J. Brown ; revision: 0.2S2 ; Sept 24, 2010 ; history: 0.S2 added enable for Studio ; 0.2X changed shiftout for Studio ; 0.2 removed debug_led to eliminiate push/pop ; 0.1 added display of program name ; 0.0 initial release of Expressionmate program ; date: June 17, 2004 ; ;########################################### ; ; ### CONDITIONAL COMPILING OPTION ### ; set MIDI INTERRUPT mode ; ; comment out next line for polled mode midi_int_en con 1 ;define to enable midi-in interrupts ; comment to set polled midi-in mode ; ;########################################### ; ; ### CONDITIONAL COMPILING OPTION ### ; set TIMER INTERRUPT mode ; note: Run led will blink if timer_int_en defined ; ; comment out next line to disable timer interrupts timer_int_en con 1 ;define to enable timer interrupts ; comment to disable timer interrupts ; ;########################################### ; ; ### CONDITIONAL COMPILING OPTION ### ; set INPUT INTERRUPT mode ; note: Requires timer_int_en to be defined ; ; comment out next line to disable input interrupts ; input_int_en con 1 ;define to enable input interrupt mode ; comment to set polled input mode ; ;########################################### ; ;djb template written by David J. Brown ;based on code from Brice Hornback and Grant Richter ;revision: 0.42 ; May 13, 2004 ;history: 0.42 renamed start_b to start_j, renamed stop_b to ; stop_j ; 0.41 upper case conversion to lower, variables and ; labels renamed ; 0.4 added averaged input input driver (polled or ; interrupt mode), display_led driver (for debug), ; speakjet driver, renamed program to djb template ; 0.3 added program header information, modified ; pin initialization ; 0.2 initialize aux output low and speakjet pins ; 0.1 added DAC & led initialization, 1 mS timestamp, ; stop led blinks when midi data received, run ; led toggles @ 0.5 S for health indication ; 0.0 initial release of midi input & output program ;date: April 13, 2004 ;******************************************* ; module: PSIM-1 REV1b ; processor Type: Basic Micro - Basic Atom Pro24M ;******************************************* ; ; Basic Micro Atom Pro-24M Configuration ; ; P0 - in-1 ; P1 - in-2 ; P2 - in-3 ; P3 - in-4 ; P4 - start button (momentary normally open switch) ; P5 - stop button (momentary normally open switch) ; P6 - j3 pin 2 (speakjet buffer half full) ; P7 - j3 pin 1 (serial data to speakjet) ; P8 - aux digital I/O ; P9 - stop led ; P10 - run led ; P11 - load_dacs ; P12 - ser_data ; P13 - clock ; P14 - j5 pin 1 (midi-in) ; P15 - j5 pin 2 (midi-out) ; ;******************************************* ; ;pin constants pin_j1 con 0 ;in-1 pin pin_j2 con 1 ;in-2 pin pin_j3 con 2 ;in-3 pin pin_j4 con 3 ;in-4 pin start_j var in4 ;start jack and switch stop_j var in5 ;stop jack and switch aux_j con 8 ;aux jack (output mode) aux_in var in8 ;aux jack (input mode) stop_led con 9 ;stop led (red) stop_out var out9 ;alias for output run_led con 10 ;run led (green) run_out var out10 ;alias for output load_dacs con 11 'load dac pin ser_data con 12 'serial data to dac pin clock con 13 'dac clock pin midi_sdata con 15 ;midi data serial output ;i/o variable declarations in_j1 var word ;in-1 value: get_inputs, get_inputs_avg, avg1 in_j2 var word ;in-2 value: get_inputs, get_inputs_avg, avc2 in_j3 var word ;in-3 value: get_inputs, get_inputs_avg, avg3 in_j4 var word ;in-4 value: get_inputs, get_inputs_avg, avg4 out_j1 var word ;out-1 value: load_outputs out_j2 var word ;out-2 value: load_outputs out_j3 var word ;out-3 value: load_outputs out_j4 var word ;out-4 value: load_outputs ;midi variable declarations note_off con $80 ;midi note-off command: send_note_on, send_note_off note_on con $90 ;midi note-on command: send_note_on, send_note_off midi_chan var nib ;midi channel (0 - 15): send_note_on, send_note_off midi_note var byte ;midi note value: send_note_on, send_note_off midi_vel var byte ;midi velocity value: send_note_on, send_note_off ;midi driver variable declarations midi_data var byte ;variable: check_midi, send_midi, get_rcx_bfr, send_note_on, send_note_off midi_byte1 var byte ;first byte of two byte midi data sequence: ptch_bnd midi_cmd var nib ;last midi command: get_cmd key_cnt var byte ;number of keys down: key_dn midi_data_isr var byte ;variable: midi_in_isr rcx_status var byte ;variable: check_midi, send_midi rcx_ptr_strt var byte ;received data start pointer (first data in buffer): get_rcx_bfr rcx_ptr_end var byte ;received data end pointer (last data in buffer+1): check_midi, midi_in_isr rcx_bfr_num var byte ;number of bytes in data buffer: check_midi, get_rcx_bfr, midi_in_isr rcx_data_flg var bit ;received data flag (1=data, 0=no data): get_rcx_bfr rcx_bfr_len con 128 ;midi-in buffer length: rcx_bfr rcx_bfr var byte(rcx_bfr_len) ;midi-in data buffer: check_midi, get_rcx_bfr, midi_in_isr ;timer variable declarations #ifdef timer_int_en time_count var long ;1 mS timer count value: tm_isr stop_off var long ;time value to turn off stop led: tm_isr trig_off var long ;time value to turn off trigger: tm_isr #endif ;input variable declarations in_j1_ptr var byte ;in-1 buffer pointer: avgx, get_inputs_avg #ifdef input_int_en in_j2_ptr var byte ;in-2 buffer pointer: avgx in_j3_ptr var byte ;in-3 buffer pointer: avgx in_j4_ptr var byte ;in-4 buffer pointer: avgx isr_cnt var nib ;timer pass counter: tm_isr #endif in_j1_tmp var long ;in-1 temporary variable: avgx, get_inputs_avg in_j2_tmp var long ;in-2 temporary variable: avgx, get_inputs_avg in_j3_tmp var long ;in-3 temporary variable: avgx, get_inputs_avg in_j4_tmp var long ;in-4 temporary variable: avgx, get_inputs_avg in_j1_bfr var long(2) ;in-1 last 4 samples buffer: avgx, get_inputs_avg in_j2_bfr var long(2) ;in-2 last 4 samples buffer: avgx, get_inputs_avg in_j3_bfr var long(2) ;in-3 last 4 samples buffer: avgx, get_inputs_avg in_j4_bfr var long(2) ;in-4 last 4 samples buffer: avgx, get_inputs_avg ;lcd variable declarations idx var byte 'message index lcd_msg bytetable $f0,$7d,$0a,$18,"Expressionmate",$f7 ;misc variable declarations led_data var byte ;variable: display_led con_data var byte ;variable: send_console ; ;******************************************* ; ;initialize pins ;note: setting midi-out, i2c_clock, and i2c_data to outputs can send glitches so initialize as inputs dirs=%0011111000000000 ;configure pin direction (1=output, 0=input) ;inputs: midi-in, aux, start, stop, in-4, in-3, in-2, in-1 ;outputs: load_dacs, ser_data, clock, stop led, run led, i2c clock & data low run_led ;set run led off low stop_led ;set stop led off high load_dacs ;set dac load-0 high low ser_data ;set dac data low low clock ;set dac clock low let out_j1=0 ;set out-1 low let out_j2=0 ;set out-2 low let out_j3=0 ;set out-3 low let out_j4=0 ;set out-4 low gosub load_outputs ; ;initialize midi hardware ;these next 6 commands need to be in this order! let scr3=%00000000 ;reset Serial Control Register let smr=%00000000 ;set Serial Mode Register ; asynchronous ; 8 bits ; parity disabled ; even parity (disabled) ; 1 stop bit ; multiprocessor mode disabled ; brr clock source direct let brr=15 ;set Bit Rate Register for 31500 baud pauseus 100 ;let brr settle for 50 uS let scr3=%00110000 ;set Serial Control Register ; transmit or receive interrupts disabled ; transmit and receive enabled ; multiprocessor interrupt disabled ; transmit end interrupt disabled ; internal baud rate generator let pmr1=%00001110 ;set Port Mode Register ; P17 general I/O port ; P16 general I/O port ; P15 general I/O port ; P14 general I/O port ; txd output ; P10 general I/O port ; #ifdef timer_int_en ;initialize timer hardware for 1 mS interrupts let tmrw=%10001000 ;set Timer Mode Register to enable count let tcrw=%10110000 ;set Timer Control Register ; TCNT cleared by compare match ; /8 internal clock let tierw=%01110000 ;set Timer Interrupt register to disable overflow interrupt let tsrw=%01110000 ;set Timer Status Register to default let tior0=%10001000 ;set Timer I/O Regiseter 0 to default let tior1=%10001000 ;set Timer I/O Register 1 to default let gra=2000 ;set General Register A ; 16 MHz clock /8 = 2 MHz ; 2000 counts = 1 mS interrupt #endif ; ;initialize misc variables let rcx_ptr_strt=0 ;set receive start pointer let rcx_ptr_end=0 ;set receive end pointer let rcx_bfr_num=0 ;set receive buffer to empty let midi_chan=0 ;set midi channel to 0 let midi_note=0 ;set midi note to 0 let midi_vel=$40 ;set default velocity let key_cnt=0 ;set all keys up let led_data=0 ;set led data to 0 let in_j1_ptr=0 ;set in-1 pointer to 0 #ifdef input_int_en let in_j2_ptr=0 ;set in-2 pointer to 0 let in_j3_ptr=0 ;set in-3 pointer to 0 let in_j4_ptr=0 ;set in-4 pointer to 0 let isr_cnt=0 ;set isr pass counter to 0 #endif let in_j1_bfr(0)=0 ;set in-1 buffer data to 0 let in_j1_bfr(1)=0 let in_j2_bfr(0)=0 ;set in-2 buffer data to 0 let in_j2_bfr(1)=0 let in_j3_bfr(0)=0 ;set in-3 buffer data to 0 let in_j3_bfr(1)=0 let in_j4_bfr(0)=0 ;set in-4 buffer data to 0 let in_j4_bfr(1)=0 let midi_cmd=7 ;set running status to null let out_j2=$2000 ;set pitchbend to mid range let out_j3=16383-out_j2 ;reverse range for inverse let out_j2=(out_j2*4)/17 ;scale so $2000 is 5 volts let out_j3=(out_j3*4)/17 ;scale inverse gosub load_outputs ; ;display program name idx=0 do midi_data=lcd_msg(idx) gosub send_midi let idx=idx+1 while midi_data<>$f7 ; ;enable timer interrupts #ifdef timer_int_en let time_count=0 ;set real time counter to 0 let stop_off=0 ;set time to turn off to time_count let trig_off=0 ;set time to trigger off to time_count oninterrupt timerwint_imiea, tm_isr enable timerwint_imiea ;enable timer interrupt #endif ; ;enable midi interrupts #ifdef midi_int_en oninterrupt sci3int_rdrf, midi_in_isr enable sci3int_rdrf ;enable midi-in interrupt #endif ; enable ;added for Studio ; ;parse midi data for command get_cmd: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then get_cmd ;wait for first byte #ifdef timer_int_en high stop_led ;flash stop led disable timerwint_imiea stop_off=time_count+20 ;set turn off time as current + 20 mS enable timerwint_imiea #endif if midi_data=$f0 then sys_ex ;start of sysex data string if midi_data.highnib=$f then sys_status ;single byte command if midi_data.bit7=0 then running ;running status so use last command let midi_cmd=(midi_data/16)&07 ;strip midi channel and shift for branch get_data: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then get_data ;wait for next byte running: branch midi_cmd,[key_up,key_dn,key_prs,ctrl_chg,prgm_chg,chan_prs,ptch_bnd,get_cmd] ; ;note off command key_up: let midi_note=midi_data key_up2: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then key_up2 ;wait for second byte key_up3: gosub send_note_off if key_cnt=0 then get_cmd ;error let key_cnt=key_cnt-1 if key_cnt<>0 then get_cmd ;some keys still down let out_j4=0 ;last key up so set gate low gosub load_outputs goto get_cmd ; ;note on command key_dn: let midi_note=midi_data key_dn2: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then key_dn2 ;wait for second byte let midi_vel=midi_data if midi_vel=0 then key_up3 ;process it as key up gosub send_note_on let out_j1=(midi_note-24)*32 ;shift down 2 octaves and convert to cv let out_j4=1920 ;set gate high gosub load_outputs let key_cnt=key_cnt+1 ;count keys down for gate #ifdef timer_int_en high aux_j ;set trigger high disable timerwint_imiea trig_off=time_count+5 ;set turn off time as current + 5 mS enable timerwint_imiea #endif goto get_cmd ; ;key pressure command key_prs: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then key_prs ;wait for second byte goto get_cmd ;not implemented ; ;control change command ctrl_chg: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then ctrl_chg ;wait for second byte goto get_cmd ;not implemented ; ;program change command prgm_chg: goto get_cmd ;not implemented ; ;channel pressure command chan_prs: goto get_cmd ;not implemented ; ;pitch bend command ptch_bnd: let midi_byte1=midi_data ;save low byte ptch_bnd2: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then ptch_bnd2 ;wait for second byte let out_j2=midi_byte1+(midi_data*128) ;add low and high 7 bits let out_j3=16383-out_j2 ;reverse range for inverse let out_j2=(out_j2*4)/17 ;scale so $2000 is 5 volts let out_j3=(out_j3*4)/17 ;scale inverse gosub load_outputs goto get_cmd ; ;system status command sys_status: goto get_cmd ;not implemented ; ;system exclusive sys_ex: gosub get_rcx_bfr ;get data from received buffer if rcx_data_flg=0 then sys_ex ;wait for next byte if midi_data<>$f7 then sys_ex ;parse until end of string goto get_cmd ;not implemented ; ;******************************************* ; subroutines ;******************************************* ; #ifndef midi_int_en ;poll midi-in ;puts data into buffer and sets rcx_bfr_num to number of entries ;written by David J. Brown check_midi: let rcx_status=ssr if rcx_status&%01000000 then ;data has been received let midi_data=rdr ;read Receiver Data Register if midi_data<>$fe then ;ignore if active status ;put midi_data into receive buffer ;check to see if buffer full if rcx_bfr_num=rcx_bfr_len then ;buffer is full ;simply loose data else ;buffer has space let rcx_bfr(rcx_ptr_end)=midi_data let rcx_bfr_num=rcx_bfr_num+1 let rcx_ptr_end=rcx_ptr_end+1 if rcx_ptr_end=rcx_bfr_len then rcx_ptr_end=0 ;wrap pointer at max value endif endif endif else ;no data received ;check if error if rcx_status&%00111000 then ;error condition let rcx_status=rcx_status&%10000111 let ssr=rcx_status ;reset error bits endif endif return #endif ; ;gets midi_data from buffer ;rcx_data_flg=1 if successful, rcx_data_flg=0 if no data in buffer ;written by David J. Brown get_rcx_bfr: #ifdef midi_int_en disable sci3int_rdrf ;isr uses the same variables #endif ;check to see if buffer empty if rcx_bfr_num=0 then ;buffer is empty let rcx_data_flg=0 ;set empty flag else ;buffer has data let midi_data=rcx_bfr(rcx_ptr_strt) let rcx_bfr_num=rcx_bfr_num-1 let rcx_ptr_strt=rcx_ptr_strt+1 if rcx_ptr_strt=rcx_bfr_len then let rcx_ptr_strt=0 ;wrap pointer at max value endif let rcx_data_flg=1 ;set data returned flag endif #ifdef midi_int_en enable sci3int_rdrf #endif return ; ;output 3 byte midi note-on command send_note_on: let midi_data=note_on+midi_chan gosub send_midi let midi_data=midi_note gosub send_midi let midi_data=midi_vel gosub send_midi return ; ;output 3 byte midi note-off command send_note_off: let midi_data=note_off+midi_chan gosub send_midi let midi_data=midi_note gosub send_midi let midi_data=0 gosub send_midi return ; ;subroutine to send midi_data ;waits until transmitter ready send_midi: let rcx_status=ssr if rcx_status&%10000000 then ;check transmitter ready ;ready to transmit let tdr=midi_data ;send data to tdr return endif goto send_midi ; #ifndef input_int_en ;sample in-1 to in-4 ;injx is input value (0 - 1023) ;150 uS execution time get_inputs: adin pin_j1,in_j1 adin pin_j2,in_j2 adin pin_j3,in_j3 adin pin_j4,in_j4 return ; ;sample and average in-1 to in-4 ;injx is input value averaged over last four samples (0 - 1023) ;injx_bfr(0) & injx_bfr(1) are last four word samples ;600 uS execution time ;written by David J. Brown get_inputs_avg: adin pin_j1,in_j1_bfr.word1(in_j1_ptr) ;get in-1 into buffer let in_j1_tmp=in_j1_bfr(0)+in_j1_bfr(1) ;add two high words together and low words together let in_j1=(in_j1_tmp.word1+in_j1_tmp.word0)/4 adin pin_j2,in_j2_bfr.word1(in_j1_ptr) ;get in-2 into buffer let in_j2_tmp=in_j2_bfr(0)+in_j2_bfr(1) ;add two high words together and low words together let in_j2=(in_j2_tmp.word1+in_j2_tmp.word0)/4 adin pin_j3,in_j3_bfr.word1(in_j1_ptr) ;get in-3 into buffer let in_j3_tmp=in_j3_bfr(0)+in_j3_bfr(1) ;add two high words together and low words together let in_j3=(in_j3_tmp.word1+in_j3_tmp.word0)/4 adin pin_j4,in_j4_bfr.word1(in_j1_ptr) ;get in-4 into buffer let in_j4_tmp=in_j4_bfr(0)+in_j4_bfr(1) ;add two high words together and low words together let in_j4=(in_j4_tmp.word1+in_j4_tmp.word0)/4 let in_j1_ptr=(in_j1_ptr+1)&$03 ;increment pointer and wrap at 3 return #endif ; ;routine to send data to console send_console: #ifdef timer_int_en disable timerwint_imiea #endif #ifdef midi_int_en disable sci3int_rdrf #endif serout s_out,i38400,[hex con_data,13] ;can miss interrupts for next 0.75 mS #ifdef midi_int_en enable sci3int_rdrf #endif #ifdef timer_int_en enable timerwint_imiea #endif return ; ;output out_jx values to dacs ;based on code written by Grant Richter ;750 uS execution time load_outputs: ;add addresses to values ;shift out 16 bits mode 4 shiftout ser_data,clock,fastmsbpre,[(out_j1+49152)\16] pulsout load_dacs,1 ;pulse loaddacs for each channel shiftout ser_data,clock,fastmsbpre,[(out_j2+32768)\16] pulsout load_dacs,1 ;pulse loaddacs for each channel shiftout ser_data,clock,fastmsbpre,[(out_j3+16384)\16] pulsout load_dacs,1 ;pulse loaddacs for each channel shiftout ser_data,clock,fastmsbpre,[out_j4\16] pulsout load_dacs,1 ;pulse loaddacs for each channel return ; ;******************************************* ;interrupt service routines ;******************************************* ; #ifdef timer_int_en ;interrupt service routine for timer ;increments time_count value ;turn off stop led at stop_off value ;toggle run led at 512 mS intervals ;written by David J. Brown tm_isr: let time_count=time_count+1 ;increment real time count if time_count=stop_off then ;value to turn off stop led low stop_led endif if time_count=trig_off then ;value to turn off trigger low aux_j endif let run_out=time_count.bit9 ;toggle run led at 512 mS intervals #endif #ifndef input_int_en resume ;resume if input polled mode #endif #ifdef input_int_en ;continue if input interrupt mode ;sample in-1 - in-4 at specific intervals ;injx is input averaged over last 4 samples (0 - 1023) ;injx_bfr(0) & injx_bfr(1) are last 4 word samples let isr_cnt=isr_cnt+1 ;change the following table to modify the scan rate for each input ;175 uS execution time so maximum of one sample and average per interrupt ;currently set for: in-1 @ 2 mS, in-2 @ 4 mS, in-3 @ 8 mS, in-4 @ 8 mS branch isr_cnt, [avg1, avg2, avg1, avg3, avg1, avg2, avg1, avg4, | avg1, avg2, avg1, avg3, avg1, avg2, avg1, avg4] ;sample in-1 avg1: adin pin_j1,in_j1_bfr.word1(in_j1_ptr) ;get in-1 into buffer let in_j1_tmp=in_j1_bfr(0)+in_j1_bfr(1) ;add two high words together and low words together let in_j1=(in_j1_tmp.word1+in_j1_tmp.word0)/4 let in_j1_ptr=(in_j1_ptr+1)&$03 ;increment pointer and wrap at 3 resume ;sample in-2 avg2: adin pin_j2,in_j2_bfr.word1(in_j2_ptr) ;get in-2 into buffer let in_j2_tmp=in_j2_bfr(0)+in_j2_bfr(1) ;add two high words together and low words together let in_j2=(in_j2_tmp.word1+in_j2_tmp.word0)/4 let in_j2_ptr=(in_j2_ptr+1)&$03 ;increment pointer and wrap at 3 resume ;sample in-3 avg3: adin pin_j3,in_j3_bfr.word1(in_j3_ptr) ;get in-3 into buffer let in_j3_tmp=in_j3_bfr(0)+in_j3_bfr(1) ;add two high words together and low words together let in_j3=(in_j3_tmp.word1+in_j3_tmp.word0)/4 let in_j3_ptr=(in_j3_ptr+1)&$03 ;increment pointer and wrap at 3 resume ;sample in-4 avg4: adin pin_j4,in_j4_bfr.word1(in_j4_ptr) ;get in-4 into buffer let in_j4_tmp=in_j4_bfr(0)+in_j4_bfr(1) ;add two high words together and low words together let in_j4=(in_j4_tmp.word1+in_j4_tmp.word0)/4 let in_j4_ptr=(in_j4_ptr+1)&$03 ;increment pointer and wrap at 3 resume #endif ; #ifdef midi_int_en ;interrupt service routine for midi-in data ;puts data into buffer and sets rcx_bfr_num to number of entries ;priority given to midi-in over timer interrupts ;written by David J. Brown midi_in_isr: ;read Receiver Data Register must be first instruction to clear interrupt let midi_data_isr=rdr ;read Receiver Data Register disable timerwint_imiea ;disable timer interrupts if midi_data_isr<>$fe then ;ignore if active status ;check to see if buffer full if rcx_bfr_num=rcx_bfr_len then ;buffer is full ;simply loose data else ;put data into buffer let rcx_bfr(rcx_ptr_end)=midi_data_isr let rcx_bfr_num=rcx_bfr_num+1 ;set rcx_bfr_num to number of entries let rcx_ptr_end=rcx_ptr_end+1 ;increment pointer for next entry if rcx_ptr_end=rcx_bfr_len then rcx_ptr_end=0 ;wrap pointer at max value endif endif endif enable timerwint_imiea resume #endif ; ;******************************************* ;end of program ;*******************************************