; KCPSM3 PicoBlaze DIGITAL-OSZILLOSKOP by cm 1/2009 ; Wave-RAM auslesen und anzeigen ; Referenz-Triggerpunkt wird von wave_ram berechnet, ; wir fangen immer bei Adresse 0 an ; Port-Definitionen ;Eingangsports CONSTANT in_status, 00 CONSTANT in_ps2, 01 CONSTANT in_triglevel, 02 CONSTANT in_hystlevel, 03 CONSTANT in_y1base, 04 CONSTANT in_y2base, 05 CONSTANT in_offsetlow, 06 CONSTANT in_offsethi, 07 CONSTANT in_wave1data, 08 CONSTANT in_wave2data, 09 ;Ports in parser.vhd CONSTANT out_adrlow, 10 CONSTANT out_adrhi, 11 CONSTANT out_data, 12 ;Ports extern CONSTANT out_control, 40 CONSTANT out_triglevel, 42 CONSTANT out_hystlevel, 43 CONSTANT out_wavelow, 46 ;Wave-RAM-Adresse CONSTANT out_wavehi, 47 ;Grafik-Befehle CONSTANT gcmd_xdata, 00 CONSTANT gcmd_ydata, 01 CONSTANT gcmd_move, 02 CONSTANT gcmd_point, 03 CONSTANT gcmd_line, 04 CONSTANT gcmd_rect, 05 CONSTANT gcmd_fill, 06 CONSTANT gcmd_xtrig, 08 CONSTANT gcmd_ytrig, 09 CONSTANT gcmd_xgrid, 0C CONSTANT gcmd_ygrid, 0D CONSTANT gcmd_color, 0F ;Text-Befehle CONSTANT tcmd_xcursor, 20 CONSTANT tcmd_ycursor, 21 CONSTANT tcmd_color, 23 ;Scratchpad Memory 4 x 8 Bytes NAMEREG s3, y1 NAMEREG s4, y2 NAMEREG s5, y1base NAMEREG s6, y2base ;NAMEREG s7, xcount NAMEREG s8, x NAMEREG s9, y NAMEREG sA, tptr_low NAMEREG sB, tptr_hi NAMEREG sC, acc NAMEREG sD, mode ; Plot-Mode NAMEREG sE, color ; Plot-Color NAMEREG sF, mask ; ;========================================================================= ;Hauptschleife ;========================================================================= cold_start: CALL init aquire: CALL reset_trigger LOAD tptr_low, 00 LOAD acc, 20 ; " " CALL txt_wr wait_aquired: CALL refresh INPUT s0, in_status ; Trigger DONE true abwarten TEST s0, 04 JUMP Z, wait_aquired CALL disable_trigger LOAD tptr_low, 00 LOAD acc, 54 ; "T" CALL txt_wr getkey: INPUT s0, in_ps2 COMPARE s0, 2D; R-Taste JUMP Z, aquire COMPARE s0, 29; Space-Taste STOP/Einzelschritt JUMP Z, getkey INPUT s0, in_status ; Key-Status TEST s0, 08 CALL wait_key_release JUMP aquire refresh: CALL wait_framedone CALL gclear CALL y1display CALL y1logic ;CALL y2display RETURN y1logic: INPUT y1base, in_y1base LOAD acc, 80 OUTPUT acc, gcmd_xtrig LOAD x, 00 CALL setReadAddr LOAD color, 03 OUTPUT color, gcmd_color LOAD mask, 01 LOAD y1base, 0C y1logictraceloop: LOAD x, 00 LOAD y, y1base INPUT y1, in_wave1data AND y1, mask JUMP NZ, y1logic0prep ADD y, 08 y1logic0prep: LOAD mode, gcmd_move ; Startpunkt links CALL plotxy LOAD mode, gcmd_point y1logicloop: CALL setReadAddr LOAD y, y1base LOAD color, 03 OUTPUT color, gcmd_color INPUT y1, in_wave1data AND y1, mask JUMP NZ, y1logic0 LOAD color, 01 OUTPUT color, gcmd_color ADD y, 04 y1logic0: CALL plotxy ADD x, 01 COMPARE x, FF JUMP NZ, y1logicloop SL0 mask ADD y1base, 10 COMPARE y1base, 8C JUMP NZ, y1logictraceloop RETURN y1display: INPUT y1base, in_y1base INPUT acc, in_hystlevel OUTPUT acc, out_hystlevel INPUT acc, in_triglevel OUTPUT acc, out_triglevel CALL accOffset ADD acc, y1base OUTPUT acc, gcmd_ytrig LOAD acc, 80 OUTPUT acc, gcmd_xtrig LOAD x, 00 CALL setReadAddr INPUT y1, in_wave1data CALL y1offset LOAD mode, gcmd_move ; Startpunkt links CALL plotxy LOAD mode, gcmd_line LOAD color, 02 OUTPUT color, gcmd_color y1refreshloop: ADD x, 01 CALL setReadAddr INPUT y1, in_wave1data CALL y1offset CALL plotxy COMPARE x, FF JUMP NZ, y1refreshloop RETURN y2display: INPUT y2base, in_y2base LOAD x, 00 CALL setReadAddr INPUT y2, in_wave2data CALL y2offset LOAD mode, gcmd_move ; Startpunkt links CALL plotxy LOAD mode, gcmd_line LOAD color, 01 OUTPUT color, gcmd_color y2refreshloop: ADD x, 01 CALL setReadAddr INPUT y2, in_wave2data CALL y2offset CALL plotxy COMPARE x, FF JUMP NZ, y2refreshloop RETURN setReadAddr: LOAD s0, 00 INPUT acc, in_offsetlow ADD acc, x OUTPUT acc, out_wavelow INPUT acc, in_offsethi ADDCY acc, s0 OUTPUT acc, out_wavehi RETURN y1offset: ; Byte y1 skalieren (0,75), negieren und mit Offset versehen, Ergebnis in y LOAD y, y1 SR0 y ; y1 div 2 ADD y1, y SRA y1 ; Zwischenergebnis jetzt in y1 LOAD y, BF ; von 192 abziehen (Nullpunkt oben), y max=191=$BF SUB y, y1 ; Wert in y jetzt zwischen 0 (oben) und 191 (unten) ADD y, y1base RETURN y2offset: ; Byte y2 skalieren (0,75), negieren und mit Offset versehen, Ergebnis in y LOAD y, y2 SR0 y ; y2 div 2 ADD y2, y SRA y2 LOAD y, BF ; von 192 abziehen (Nullpunkt oben), y max=191=$BF SUB y, y2 ADD y, y2base RETURN accOffset: ; Byte acc skalieren (0,75) und negieren, Ergebnis in acc LOAD s0, acc SR0 s0 ; acc div 2 ADD acc, s0 SRA acc ; Zwischenergebnis jetzt in y1 LOAD s0, BF ; von 192 abziehen (Nullpunkt oben), y max=191=$BF SUB s0, acc LOAD acc, s0 RETURN ;========================================================================= ;Grafik- und Text-Subroutinen ;========================================================================= plotxy: ;plot at point x,y with mode (MOVE, POINT, LINE etc). INPUT s0, in_status ; letzter Befehl fertig? TEST s0, 01 JUMP Z, plotxy OUTPUT x, gcmd_xdata OUTPUT y, gcmd_ydata LOAD s0, 00 OUTPUT s0, (mode) ; Befehl triggern RETURN txt_wr: ; acc in Textbuffer schreiben an Position tptr_low, tptr_hi und ptr erhöhen OUTPUT tptr_hi, out_adrhi OUTPUT tptr_low, out_adrlow OUTPUT acc, out_data LOAD s0, 01 ADD tptr_low, s0 LOAD s0, 00 ADDCY tptr_hi, s0 RETURN ;========================================================================= ;Steuerungs-Subroutinen ;========================================================================= ; Ende der Frame-Anzeige abwarten (Flicker!) wait_framedone: INPUT s0, in_status ; FRAMEDONE false abwarten TEST s0, 02 JUMP NZ, wait_framedone frame_done2: INPUT s0, in_status ; FRAMEDONE true abwarten TEST s0, 02 JUMP Z, frame_done2 RETURN sdelay: LOAD s0, FF sdelay_loop: SUB s0, 01 JUMP NZ, sdelay_loop RETURN wait_key_release: INPUT s0, in_status ; Key losgelassen abwarten TEST s0, 08 JUMP NZ, wait_key_release RETURN reset_trigger: LOAD s0, 01 ; trig_reset OUTPUT s0, out_control LOAD s0, 02 ; trig_ena OUTPUT s0, out_control RETURN disable_trigger: LOAD s0, 00 ; trig_ena low OUTPUT s0, out_control RETURN init: CALL sdelay LOAD s0, 00 OUTPUT s0, out_wavehi LOAD s0, 80 OUTPUT s0, out_wavelow LOAD acc, 10 OUTPUT acc, gcmd_xgrid OUTPUT acc, gcmd_ygrid CALL tclear LOAD tptr_low, 00 LOAD tptr_hi, 00 gclear: ; Grafikfenster löschen: Rechteck mit Farbe 0 zeichnen LOAD x, 00 LOAD y, 00 LOAD mode, gcmd_move CALL plotxy LOAD s0, 00 OUTPUT s0, gcmd_color LOAD x, ff LOAD y, bf LOAD mode, gcmd_fill CALL plotxy gclear_wait: INPUT s0, in_status ; letzter Befehl fertig? TEST s0, 01 JUMP Z, gclear_wait RETURN tclear: ; Text löschen LOAD tptr_low, 00 LOAD tptr_hi, 00 LOAD acc, 20 erase_loop: CALL txt_wr COMPARE tptr_hi, 0F JUMP NZ, erase_loop statusline: LOAD tptr_low, 46 LOAD tptr_hi, 00 LOAD acc, 63 ; "c" CALL txt_wr LOAD acc, 27 ; "'" CALL txt_wr LOAD acc, 74 ; "t" CALL txt_wr LOAD acc, 20 ; " " CALL txt_wr LOAD acc, 53 ; "S" CALL txt_wr LOAD acc, 43 ; "C" CALL txt_wr LOAD acc, 4F ; "O" CALL txt_wr LOAD acc, 50 ; "P" CALL txt_wr LOAD acc, 45 ; "E" CALL txt_wr RETURN