HW9: Initial glue of 7 & 8

3 files changed, 356 insertions, 0 deletions

diff --git a/cmpen472hw3_McDonnell/Sources/cmpen472hw3_McDonnell.asm b/cmpen472hw3_McDonnell/Sources/cmpen472hw3_McDonnell.asm
new file mode 100644
index 0000000..7e19beb
--- /dev/null
+++ b/cmpen472hw3_McDonnell/Sources/cmpen472hw3_McDonnell.asm
@@ -0,0 +1,173 @@
+**************************************************************************
+*
+* Title:        LED Light Dimmer
+*
+* Objective:    CMPEN 472 Homework 3
+*
+* Revision:     V1.0
+*
+* Date:         Feb. 5, 2025
+*
+* Programmer:   Jacob McDonnell
+*
+* Company:      The Pennsylvania State University
+*               Department of Computer Science and Engineering
+*
+* Algorithm:    Simple Parallel I/O use and time delay-loop demo
+*
+* Register Use: A: LED Light on/off state and Switch 1 on/off state
+*               X: Delay loop counter
+*
+* Memory Use:   RAM Locations from $3000 for data,
+*               RAM Locations from $3100 for program
+*
+* Input:        Parameters hard-coded in the program - PORTB
+*               Switch 1 at PORTB bit 0
+*               Switch 2 at PORTB bit 1
+*               Switch 3 at PORTB bit 2
+*               Switch 4 at PORTB bit 3
+*
+* Output:       LED 1 at PORTB bit 4
+*               LED 2 at PORTB bit 5
+*               LED 3 at PORTB bit 6
+*               LED 4 at PORTB bit 7
+*
+* Observation:  This program will dim the LED4 to either 5% when the 
+*               switch is not pressed and 15% when the switch is pressed.
+*
+* Note:         ON CSM-12C128 board,
+*               Switch 1 is at PORTB bit 0, and
+*               LED 4 is at PORTB bit 7.
+*
+* Comments:     This program is developed and simulated using CodeWarrior
+*               development software and targeted for Axion
+*               Manufacturing's CSM-12C128 board running at 24MHz.
+*
+**************************************************************************
+* Parameter Declearation Section
+*
+* Export Symbols
+            xdef        pgstart         ; export 'pgstart' symbol
+            absentry    pgstart         ; for assembly entry point
+
+* Symbols and Macros
+PORTA       equ         $0000           ; i/o port A addresses
+DDRA        equ         $0002           ; data direction register for PORTA
+PORTB       equ         $0001           ; i/o port B addresses
+DDRB        equ         $0003           ; data direction register for PORTB
+
+**************************************************************************
+* Data Section: address used [ $3000 to $30FF ] RAM Memory
+*
+            org         $3000           ; Reserved RAM memory starting address
+                                        ;   for Data for CMPEN 472 class
+Counter     dc.w        $0039           ; X register count number for time Delay
+                                        ;   loop for 10 useconds
+                                        ; The work to calculate this number is in
+                                        ; the comments for the delay10usec subroutine.
+                                        
+ONN         dc.b        $0005           ; Counter for how long LED should be on for
+
+OFF         dc.b        $005f           ; Counter for how long LED should be off for
+
+*
+**************************************************************************
+* Program Section: address used [ $3100 to $3FFF ] RAM Memory
+*
+            org         $3100           ; Program start address, in RAM
+pgstart     lds         #$3100          ; initialize the stack pointer
+
+            ldaa        #%11110001      ; LED 1,2,3,4 at PORTB bit 4,5,6,7
+            staa        DDRB            ; set PORTB bit 4,5,6,7 as output
+
+
+            ldaa        #%01010000
+            staa        PORTB           ; Turn on only LEDs 1 & 3 on PORTB
+
+mainLoop
+            ldaa        PORTB           ; check bit 0 of PORTB, switch 1
+            anda        #%00000001      ; if 0, run blink LED4 5% light level
+            bne         p25LED4         ; if 1, run blink LED4 25% light level
+
+p05LED4
+            ldaa        #5              ; load 5 into accumulator A
+            staa        ONN             ; store A in counter ONN
+            ldaa        #95             ; load 95 into accumulator A
+            staa        OFF             ; store A in counter OFF
+            jsr         dimmer          ; jump to dimmer subroutine
+            bra         mainLoop        ; loop to mainLoop to check switch
+
+p25LED4
+            ldaa        #25             ; load 25 into accumulator A
+            staa        ONN             ; store A in counter ONN
+            ldaa        #75             ; load 75 into accumulator A
+            staa        OFF             ; store A in counter OFF
+            jsr         dimmer          ; jump to dimmer subroutine
+            bra         mainLoop        ; loop to mainLoop to check switch
+
+**************************************************************************
+* Subroutine Section: address used [ $3100 to $3FFF ] RAM Memory
+*
+
+;*************************************************************************
+; dimmer subroutine
+;
+; This subroutine will dim LED4 to a given level
+;
+; Input:                   Two 1 byte counters, ONN and OFF, for how many times
+;                          LED4 should be on and off for.
+; Output:                  LED4 dimmed to a given level, wasted cycles
+; Registers in use:        A accumulator to counter number of times looped
+; Memory locations in use: Two bytes ONN and OFF used to dim the LED4 to a given level
+;
+; Comments: This subroutine requires delay10usec subroutine
+;
+
+dimmer
+            bset        PORTB,%10000000 ; Turn LED4 on
+            psha                        ; Save A to the stack
+onDelay     ldaa        ONN             ; Load counter ONN into A
+            beq         skipToOff       ; if zero jump to loop2 for off
+            jsr         delay10usec     ; delay for 10 microseconds
+            dec         ONN             ; decrement counter ONN by 1
+            bra         onDelay         ; jump back to loop1 always
+skipToOff   bclr        PORTB,%10000000 ; Turn off LED4
+offDelay    ldaa        OFF             ; load counter OFF into A
+            beq         doneLoop        ; if 0, skip loop
+            jsr         delay10usec     ; delay 10 microseconds
+            dec         OFF             ; decrement counter OFF by 1
+            bra         offDelay        ; jump back to loop2 always
+doneLoop    pula                        ; restore A from the stack
+            rts                         ; return to caller
+
+;*************************************************************************
+; delay10usec subroutine
+;
+; This subroutine causes a 10 usec. delay
+;
+; Input:                   a 16bit count number in 'Counter'
+; Output:                  time delay, cpu cycle wasted
+; Registers in use:        X register, as counter
+; Memory locations in use: a 16bit input number at 'Counter'
+;
+; Comments: Code relies on counter being $39 to be exactly 10 usec work is below
+; Given: freq = 24MHz = 24000000     sec = 10 usec = 0.00001
+; freq = cycles / seconds
+; 
+; cycles = freq * seconds = 24000000Hz * 0.00001 = 240
+; 
+; This sub routine is 12 + 4 * 'Counter' cycles long, solving for 'Counter'
+; the result is found to be 57.
+;
+
+delay10usec
+            pshx                        ; Save register x to the stack
+            ldx         Counter         ; load counter into register x
+innerLoop   dex                         ; decrement register x by 1
+            bne         innerLoop       ; loop while register x is not 0
+            pulx                        ; restore register x from the stack
+            nop                         ; extra nop to make exactly 10 usec
+            rts                         ; return to caller
+
+            end                         ; last line of the file
+
diff --git a/cmpen472hw3_McDonnell/Sources/derivative.inc b/cmpen472hw3_McDonnell/Sources/derivative.inc
new file mode 100644
index 0000000..988343b
--- /dev/null
+++ b/cmpen472hw3_McDonnell/Sources/derivative.inc
@@ -0,0 +1,10 @@
+
+ ; Note: This file is recreated by the project wizard whenever the MCU is
+ ;       changed and should not be edited by hand
+ ;
+
+			; include derivative specific macros
+            INCLUDE 'mc9s12c32.inc'
+
+		
+
diff --git a/cmpen472hw3_McDonnell/Sources/main.asm b/cmpen472hw3_McDonnell/Sources/main.asm
new file mode 100644
index 0000000..7e19beb
--- /dev/null
+++ b/cmpen472hw3_McDonnell/Sources/main.asm
@@ -0,0 +1,173 @@
+**************************************************************************
+*
+* Title:        LED Light Dimmer
+*
+* Objective:    CMPEN 472 Homework 3
+*
+* Revision:     V1.0
+*
+* Date:         Feb. 5, 2025
+*
+* Programmer:   Jacob McDonnell
+*
+* Company:      The Pennsylvania State University
+*               Department of Computer Science and Engineering
+*
+* Algorithm:    Simple Parallel I/O use and time delay-loop demo
+*
+* Register Use: A: LED Light on/off state and Switch 1 on/off state
+*               X: Delay loop counter
+*
+* Memory Use:   RAM Locations from $3000 for data,
+*               RAM Locations from $3100 for program
+*
+* Input:        Parameters hard-coded in the program - PORTB
+*               Switch 1 at PORTB bit 0
+*               Switch 2 at PORTB bit 1
+*               Switch 3 at PORTB bit 2
+*               Switch 4 at PORTB bit 3
+*
+* Output:       LED 1 at PORTB bit 4
+*               LED 2 at PORTB bit 5
+*               LED 3 at PORTB bit 6
+*               LED 4 at PORTB bit 7
+*
+* Observation:  This program will dim the LED4 to either 5% when the 
+*               switch is not pressed and 15% when the switch is pressed.
+*
+* Note:         ON CSM-12C128 board,
+*               Switch 1 is at PORTB bit 0, and
+*               LED 4 is at PORTB bit 7.
+*
+* Comments:     This program is developed and simulated using CodeWarrior
+*               development software and targeted for Axion
+*               Manufacturing's CSM-12C128 board running at 24MHz.
+*
+**************************************************************************
+* Parameter Declearation Section
+*
+* Export Symbols
+            xdef        pgstart         ; export 'pgstart' symbol
+            absentry    pgstart         ; for assembly entry point
+
+* Symbols and Macros
+PORTA       equ         $0000           ; i/o port A addresses
+DDRA        equ         $0002           ; data direction register for PORTA
+PORTB       equ         $0001           ; i/o port B addresses
+DDRB        equ         $0003           ; data direction register for PORTB
+
+**************************************************************************
+* Data Section: address used [ $3000 to $30FF ] RAM Memory
+*
+            org         $3000           ; Reserved RAM memory starting address
+                                        ;   for Data for CMPEN 472 class
+Counter     dc.w        $0039           ; X register count number for time Delay
+                                        ;   loop for 10 useconds
+                                        ; The work to calculate this number is in
+                                        ; the comments for the delay10usec subroutine.
+                                        
+ONN         dc.b        $0005           ; Counter for how long LED should be on for
+
+OFF         dc.b        $005f           ; Counter for how long LED should be off for
+
+*
+**************************************************************************
+* Program Section: address used [ $3100 to $3FFF ] RAM Memory
+*
+            org         $3100           ; Program start address, in RAM
+pgstart     lds         #$3100          ; initialize the stack pointer
+
+            ldaa        #%11110001      ; LED 1,2,3,4 at PORTB bit 4,5,6,7
+            staa        DDRB            ; set PORTB bit 4,5,6,7 as output
+
+
+            ldaa        #%01010000
+            staa        PORTB           ; Turn on only LEDs 1 & 3 on PORTB
+
+mainLoop
+            ldaa        PORTB           ; check bit 0 of PORTB, switch 1
+            anda        #%00000001      ; if 0, run blink LED4 5% light level
+            bne         p25LED4         ; if 1, run blink LED4 25% light level
+
+p05LED4
+            ldaa        #5              ; load 5 into accumulator A
+            staa        ONN             ; store A in counter ONN
+            ldaa        #95             ; load 95 into accumulator A
+            staa        OFF             ; store A in counter OFF
+            jsr         dimmer          ; jump to dimmer subroutine
+            bra         mainLoop        ; loop to mainLoop to check switch
+
+p25LED4
+            ldaa        #25             ; load 25 into accumulator A
+            staa        ONN             ; store A in counter ONN
+            ldaa        #75             ; load 75 into accumulator A
+            staa        OFF             ; store A in counter OFF
+            jsr         dimmer          ; jump to dimmer subroutine
+            bra         mainLoop        ; loop to mainLoop to check switch
+
+**************************************************************************
+* Subroutine Section: address used [ $3100 to $3FFF ] RAM Memory
+*
+
+;*************************************************************************
+; dimmer subroutine
+;
+; This subroutine will dim LED4 to a given level
+;
+; Input:                   Two 1 byte counters, ONN and OFF, for how many times
+;                          LED4 should be on and off for.
+; Output:                  LED4 dimmed to a given level, wasted cycles
+; Registers in use:        A accumulator to counter number of times looped
+; Memory locations in use: Two bytes ONN and OFF used to dim the LED4 to a given level
+;
+; Comments: This subroutine requires delay10usec subroutine
+;
+
+dimmer
+            bset        PORTB,%10000000 ; Turn LED4 on
+            psha                        ; Save A to the stack
+onDelay     ldaa        ONN             ; Load counter ONN into A
+            beq         skipToOff       ; if zero jump to loop2 for off
+            jsr         delay10usec     ; delay for 10 microseconds
+            dec         ONN             ; decrement counter ONN by 1
+            bra         onDelay         ; jump back to loop1 always
+skipToOff   bclr        PORTB,%10000000 ; Turn off LED4
+offDelay    ldaa        OFF             ; load counter OFF into A
+            beq         doneLoop        ; if 0, skip loop
+            jsr         delay10usec     ; delay 10 microseconds
+            dec         OFF             ; decrement counter OFF by 1
+            bra         offDelay        ; jump back to loop2 always
+doneLoop    pula                        ; restore A from the stack
+            rts                         ; return to caller
+
+;*************************************************************************
+; delay10usec subroutine
+;
+; This subroutine causes a 10 usec. delay
+;
+; Input:                   a 16bit count number in 'Counter'
+; Output:                  time delay, cpu cycle wasted
+; Registers in use:        X register, as counter
+; Memory locations in use: a 16bit input number at 'Counter'
+;
+; Comments: Code relies on counter being $39 to be exactly 10 usec work is below
+; Given: freq = 24MHz = 24000000     sec = 10 usec = 0.00001
+; freq = cycles / seconds
+; 
+; cycles = freq * seconds = 24000000Hz * 0.00001 = 240
+; 
+; This sub routine is 12 + 4 * 'Counter' cycles long, solving for 'Counter'
+; the result is found to be 57.
+;
+
+delay10usec
+            pshx                        ; Save register x to the stack
+            ldx         Counter         ; load counter into register x
+innerLoop   dex                         ; decrement register x by 1
+            bne         innerLoop       ; loop while register x is not 0
+            pulx                        ; restore register x from the stack
+            nop                         ; extra nop to make exactly 10 usec
+            rts                         ; return to caller
+
+            end                         ; last line of the file
+