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Merge Branch for Division Subroutine #9

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912b604
Division subroutine
minniewang12 Nov 30, 2023
32bcceb
Update configurations.xml
minniewang12 Nov 30, 2023
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71 changes: 66 additions & 5 deletions main.s
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,13 @@
#include <xc.inc>
#include <xc.inc>

psect code, abs

psect udata_
myNumerator:ds 1
myDenominator:ds 1
myQuotient:ds 1
myRemainder:ds 1
myDiff:ds 1

main:
org 0x0
Expand All @@ -9,16 +16,70 @@ main:
org 0x100 ; Main code starts here at address 0x100
start:
movlw 0x0
movwf TRISB, A ; Port C all outputs
movwf TRISC, A ; Port C all outputs
bra test
loop:
movff 0x06, PORTB
movff 0x06, PORTC
incf 0x06, W, A
test:
movwf 0x06, A ; Test for end of loop condition
movlw 0x63
movlw 0x01
cpfsgt 0x06, A
bra loop ; Not yet finished goto start of loop again
goto 0x0 ; Re-run program from start
;goto 0x0 ; Re-run program from start

; PIC18 Assembly division example

; Inputs:
; Numerator in WREG
; Denominator in a register (e.g., myDenominator)

; Initialize variables
MOVLW 11 ; Numerator
MOVWF myNumerator

MOVLW 3 ; Denominator
MOVWF myDenominator

; Perform division
CALL Divide

; Result is now in WREG

; Your code here

Divide:
; Ensure myDenominator is not zero
MOVLW 0
CPFSEQ myDenominator
GOTO Clear ; Check the MSB of myDenominator
GOTO DivisionError ; If zero, handle division by zero
Clear: ; Perform division algorithm
CLRF myQuotient ; Clear the quotient register
CLRF myRemainder ; Clear the remainder register

DivideLoop:
MOVFF myNumerator, WREG

; rather than doing subtraction, just do a comparison
CPFSGT myDenominator ; myNumerator(WREG) < myDenominator, skip to finish
GOTO Incr
GOTO DivisionDone ; Done if myNumerator < myDenominator
Incr:
INCF myQuotient, 1 ; Increment quotient
MOVFF myDenominator, WREG
SUBWF myNumerator, 1 ; myNumerator -= myDenominator
GOTO DivideLoop ; Repeat the loop

DivisionDone:
; Quotient is in myQuotient, remainder is in myRemainder
MOVFF myQuotient, PORTC
RETURN

DivisionError:
; Handle division by zero or other error
; Your code here
RETURN

end main

199 changes: 92 additions & 107 deletions nbproject/configurations.xml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,13 @@
<logicalFolder name="SourceFiles"
displayName="Source Files"
projectFiles="true">
<itemPath>main.s</itemPath>
<itemPath>config.s</itemPath>
<itemPath>main.s</itemPath>
<itemPath>UART.s</itemPath>
<itemPath>LCD.s</itemPath>
<itemPath>Keypad.s</itemPath>
<itemPath>Digit_Reader.s</itemPath>
<itemPath>Calculations.s</itemPath>
</logicalFolder>
<logicalFolder name="ExternalFiles"
displayName="Important Files"
Expand All @@ -31,8 +36,8 @@
<targetPluginBoard></targetPluginBoard>
<platformTool>Simulator</platformTool>
<languageToolchain>pic-as</languageToolchain>
<languageToolchainVersion>2.41</languageToolchainVersion>
<platform>3</platform>
<languageToolchainVersion>2.45</languageToolchainVersion>
<platform>4</platform>
</toolsSet>
<packs>
<pack name="PIC18F-K_DFP" vendor="Microchip" version="1.8.249"/>
Expand Down Expand Up @@ -64,86 +69,50 @@
<makeCustomizationEnableLongLines>false</makeCustomizationEnableLongLines>
<makeCustomizationNormalizeHexFile>false</makeCustomizationNormalizeHexFile>
</makeCustomizationType>
<HI-TECH-COMP>
<property key="additional-warnings" value="true"/>
<property key="asmlist" value="true"/>
<property key="call-prologues" value="false"/>
<property key="default-bitfield-type" value="true"/>
<property key="default-char-type" value="true"/>
<property key="define-macros" value=""/>
<property key="disable-optimizations" value="true"/>
<property key="extra-include-directories" value=""/>
<property key="favor-optimization-for" value="-speed,+space"/>
<property key="garbage-collect-data" value="true"/>
<property key="garbage-collect-functions" value="true"/>
<property key="identifier-length" value="255"/>
<property key="local-generation" value="false"/>
<property key="operation-mode" value="free"/>
<property key="opt-xc8-compiler-strict_ansi" value="false"/>
<property key="optimization-assembler" value="true"/>
<property key="optimization-assembler-files" value="true"/>
<property key="optimization-debug" value="false"/>
<property key="optimization-invariant-enable" value="false"/>
<property key="optimization-invariant-value" value="16"/>
<property key="optimization-level" value="-O0"/>
<property key="optimization-speed" value="false"/>
<property key="optimization-stable-enable" value="false"/>
<property key="preprocess-assembler" value="true"/>
<property key="short-enums" value="true"/>
<property key="tentative-definitions" value="-fno-common"/>
<property key="undefine-macros" value=""/>
<property key="use-cci" value="false"/>
<property key="use-iar" value="false"/>
<property key="verbose" value="false"/>
<property key="warning-level" value="-3"/>
<property key="what-to-do" value="ignore"/>
</HI-TECH-COMP>
<HI-TECH-LINK>
<property key="additional-options-checksum" value=""/>
<property key="additional-options-code-offset" value=""/>
<property key="additional-options-command-line" value=""/>
<property key="additional-options-errata" value=""/>
<property key="additional-options-extend-address" value="false"/>
<property key="additional-options-trace-type" value=""/>
<property key="additional-options-use-response-files" value="false"/>
<property key="backup-reset-condition-flags" value="false"/>
<property key="calibrate-oscillator" value="false"/>
<property key="calibrate-oscillator-value" value="0x3400"/>
<property key="clear-bss" value="true"/>
<property key="code-model-external" value="wordwrite"/>
<property key="code-model-rom" value=""/>
<property key="create-html-files" value="false"/>
<property key="data-model-ram" value=""/>
<property key="data-model-size-of-double" value="32"/>
<property key="data-model-size-of-double-gcc" value="no-short-double"/>
<property key="data-model-size-of-float" value="32"/>
<property key="data-model-size-of-float-gcc" value="no-short-float"/>
<property key="display-class-usage" value="false"/>
<property key="display-hex-usage" value="false"/>
<property key="display-overall-usage" value="true"/>
<property key="display-psect-usage" value="false"/>
<property key="extra-lib-directories" value=""/>
<property key="fill-flash-options-addr" value=""/>
<property key="fill-flash-options-const" value=""/>
<property key="fill-flash-options-how" value="0"/>
<property key="fill-flash-options-inc-const" value="1"/>
<property key="fill-flash-options-increment" value=""/>
<property key="fill-flash-options-seq" value=""/>
<property key="fill-flash-options-what" value="0"/>
<property key="format-hex-file-for-download" value="false"/>
<property key="initialize-data" value="true"/>
<property key="input-libraries" value="libm"/>
<property key="keep-generated-startup.as" value="false"/>
<property key="link-in-c-library" value="true"/>
<property key="link-in-c-library-gcc" value=""/>
<property key="link-in-peripheral-library" value="false"/>
<property key="managed-stack" value="false"/>
<property key="opt-xc8-linker-file" value="false"/>
<property key="opt-xc8-linker-link_startup" value="false"/>
<property key="opt-xc8-linker-serial" value=""/>
<property key="program-the-device-with-default-config-words" value="false"/>
<property key="remove-unused-sections" value="true"/>
</HI-TECH-LINK>
<ICD3PlatformTool>
<property key="AutoSelectMemRanges" value="auto"/>
<property key="Freeze Peripherals" value="true"/>
<property key="SecureSegment.SegmentProgramming" value="FullChipProgramming"/>
<property key="ToolFirmwareFilePath"
value="Press to browse for a specific firmware version"/>
<property key="ToolFirmwareOption.UseLatestFirmware" value="true"/>
<property key="debugoptions.debug-startup" value="Use system settings"/>
<property key="debugoptions.reset-behaviour" value="Use system settings"/>
<property key="debugoptions.useswbreakpoints" value="false"/>
<property key="event.recorder.enabled" value="false"/>
<property key="event.recorder.scvd.files" value=""/>
<property key="hwtoolclock.frcindebug" value="false"/>
<property key="lastid" value=""/>
<property key="memories.aux" value="false"/>
<property key="memories.bootflash" value="false"/>
<property key="memories.configurationmemory" value="true"/>
<property key="memories.configurationmemory2" value="true"/>
<property key="memories.dataflash" value="true"/>
<property key="memories.eeprom" value="true"/>
<property key="memories.flashdata" value="true"/>
<property key="memories.id" value="true"/>
<property key="memories.instruction.ram" value="true"/>
<property key="memories.instruction.ram.ranges"
value="${memories.instruction.ram.ranges}"/>
<property key="memories.programmemory" value="true"/>
<property key="memories.programmemory.ranges" value="0-1ffff"/>
<property key="poweroptions.powerenable" value="false"/>
<property key="programoptions.donoteraseauxmem" value="false"/>
<property key="programoptions.eraseb4program" value="true"/>
<property key="programoptions.preservedataflash" value="false"/>
<property key="programoptions.preservedataflash.ranges" value=""/>
<property key="programoptions.preserveeeprom" value="false"/>
<property key="programoptions.preserveeeprom.ranges" value="0-3ff"/>
<property key="programoptions.preserveprogram.ranges" value=""/>
<property key="programoptions.preserveprogramrange" value="false"/>
<property key="programoptions.preserveuserid" value="false"/>
<property key="programoptions.programcalmem" value="false"/>
<property key="programoptions.programuserotp" value="false"/>
<property key="programoptions.testmodeentrymethod" value="VDDFirst"/>
<property key="programoptions.usehighvoltageonmclr" value="false"/>
<property key="programoptions.uselvpprogramming" value="false"/>
<property key="voltagevalue" value="3.25"/>
</ICD3PlatformTool>
<Simulator>
<property key="codecoverage.enabled" value="Disable"/>
<property key="codecoverage.enableoutputtofile" value="false"/>
Expand Down Expand Up @@ -619,14 +588,35 @@
<property key="warningmessagebreakoptions.warningmessages" value="holdstate"/>
</Simulator>
<Tool>
<property key="AutoSelectMemRanges" value="auto"/>
<property key="Freeze Peripherals" value="true"/>
<property key="SecureSegment.SegmentProgramming" value="FullChipProgramming"/>
<property key="ToolFirmwareFilePath"
value="Press to browse for a specific firmware version"/>
<property key="ToolFirmwareOption.UseLatestFirmware" value="true"/>
<property key="codecoverage.enabled" value="Disable"/>
<property key="codecoverage.enableoutputtofile" value="false"/>
<property key="codecoverage.outputfile" value=""/>
<property key="debugoptions.debug-startup" value="Use system settings"/>
<property key="debugoptions.reset-behaviour" value="Use system settings"/>
<property key="debugoptions.useswbreakpoints" value="false"/>
<property key="event.recorder.enabled" value="false"/>
<property key="event.recorder.scvd.files" value=""/>
<property key="hwtoolclock.frcindebug" value="false"/>
<property key="lastid" value=""/>
<property key="memories.aux" value="false"/>
<property key="memories.bootflash" value="false"/>
<property key="memories.configurationmemory" value="true"/>
<property key="memories.configurationmemory2" value="true"/>
<property key="memories.dataflash" value="true"/>
<property key="memories.eeprom" value="true"/>
<property key="memories.flashdata" value="true"/>
<property key="memories.id" value="true"/>
<property key="memories.instruction.ram" value="true"/>
<property key="memories.instruction.ram.ranges"
value="${memories.instruction.ram.ranges}"/>
<property key="memories.programmemory" value="true"/>
<property key="memories.programmemory.ranges" value="0-1ffff"/>
<property key="oscillator.auxfrequency" value="120"/>
<property key="oscillator.auxfrequencyunit" value="Mega"/>
<property key="oscillator.frequency" value="1"/>
Expand All @@ -645,6 +635,21 @@
<property key="periphComp4.gte" value="gt"/>
<property key="periphComp5.gte" value="gt"/>
<property key="periphComp6.gte" value="gt"/>
<property key="poweroptions.powerenable" value="false"/>
<property key="programoptions.donoteraseauxmem" value="false"/>
<property key="programoptions.eraseb4program" value="true"/>
<property key="programoptions.preservedataflash" value="false"/>
<property key="programoptions.preservedataflash.ranges" value=""/>
<property key="programoptions.preserveeeprom" value="false"/>
<property key="programoptions.preserveeeprom.ranges" value="0-3ff"/>
<property key="programoptions.preserveprogram.ranges" value=""/>
<property key="programoptions.preserveprogramrange" value="false"/>
<property key="programoptions.preserveuserid" value="false"/>
<property key="programoptions.programcalmem" value="false"/>
<property key="programoptions.programuserotp" value="false"/>
<property key="programoptions.testmodeentrymethod" value="VDDFirst"/>
<property key="programoptions.usehighvoltageonmclr" value="false"/>
<property key="programoptions.uselvpprogramming" value="false"/>
<property key="reset.scl" value="false"/>
<property key="reset.type" value="MCLR"/>
<property key="toolpack.updateoptions"
Expand Down Expand Up @@ -721,6 +726,7 @@
<property key="usartf1io.output" value="window"/>
<property key="usartf1io.outputfile" value=""/>
<property key="usartf1io.uartioenabled" value="false"/>
<property key="voltagevalue" value="3.25"/>
<property key="warningmessagebreakoptions.W0001_CORE_BITREV_MODULO_EN"
value="report"/>
<property key="warningmessagebreakoptions.W0002_CORE_SECURE_MEMORYACCESS"
Expand Down Expand Up @@ -1092,28 +1098,6 @@
value=""/>
<property key="warningmessagebreakoptions.warningmessages" value="holdstate"/>
</Tool>
<XC8-CO>
<property key="coverage-enable" value=""/>
<property key="stack-guidance" value="false"/>
</XC8-CO>
<XC8-config-global>
<property key="advanced-elf" value="true"/>
<property key="constdata-progmem" value="true"/>
<property key="gcc-opt-driver-new" value="true"/>
<property key="gcc-opt-std" value="-std=c99"/>
<property key="gcc-output-file-format" value="dwarf-3"/>
<property key="mapped-progmem" value="false"/>
<property key="omit-pack-options" value="false"/>
<property key="omit-pack-options-new" value="1"/>
<property key="output-file-format" value="-mcof,+elf"/>
<property key="smart-io-format" value=""/>
<property key="stack-size-high" value="auto"/>
<property key="stack-size-low" value="auto"/>
<property key="stack-size-main" value="auto"/>
<property key="stack-type" value="compiled"/>
<property key="user-pack-device-support" value=""/>
<property key="wpo-lto" value="false"/>
</XC8-config-global>
<pic-as-assembler>
<property key="fmax-errors" value="20"/>
<property key="list-custom-assembler-options" value=""/>
Expand All @@ -1134,14 +1118,15 @@
<property key="summary-file" value="false"/>
<property key="summary-hex" value="false"/>
<property key="summary-mem" value="true"/>
<property key="summary-psect" value="false"/>
<property key="summary-psect" value="true"/>
<property key="summary-sha1" value="false"/>
<property key="summary-sha256" value="false"/>
<property key="summary-xml" value="false"/>
<property key="summary-xmlfull" value="false"/>
<appendMe value="-Wa,-a -Wl,-Map=output.map"/>
</pic-as-global>
<pic-as-linker>
<property key="linker-callgraph" value="std"/>
<property key="linker-callgraph" value="full"/>
<property key="linker-checksum" value=""/>
<property key="linker-custom-options" value=""/>
<property key="linker-fill" value=""/>
Expand Down