diff options
Diffstat (limited to 'cmpen472hw10_McDonnell/bin/main.dbg')
| -rw-r--r-- | cmpen472hw10_McDonnell/bin/main.dbg | 89 |
1 files changed, 82 insertions, 7 deletions
diff --git a/cmpen472hw10_McDonnell/bin/main.dbg b/cmpen472hw10_McDonnell/bin/main.dbg index d635a34..26d5a48 100644 --- a/cmpen472hw10_McDonnell/bin/main.dbg +++ b/cmpen472hw10_McDonnell/bin/main.dbg @@ -1,19 +1,20 @@ ************************************************************************** * -* Title: Calculator Clock +* Title: Signal Generator * -* Objective: CMPEN 472 Homework 9 +* Objective: CMPEN 472 Homework 10 * * Revision: V1.0 * -* Date: Apr. 2, 2025 +* Date: Apr. 11, 2025 * * Programmer: Jacob McDonnell * * Company: The Pennsylvania State University * Department of Computer Science and Engineering * -* Algorithm: Simple Serial I/O, Real Time Interrupts for Time Tracking +* Algorithm: Simple Serial I/O, Real Time Interrupts for Time Tracking, and +* output compare timer for generating functions. * * Register Use: A & B to current byte, etc, * X & Y holds address of strings and length of string, @@ -248,6 +249,20 @@ rtiisr bset CRGFLG,%10000000; Clear RTI Interrupt Flag rtidone jsr PrintTime ; Jump to PrintTime rtiSkip RTI ; Return from RTI ISR +;************************************************************************* +; oc5isr subroutine +; +; This subroutine will set a flag after a set number of cycles. +; +; Input: interval memory location for the number of cycles between triggers +; Output: The outputCnt counting the number of triggers, and timeTrigger to +; signal a timmer trigger. +; Registers in use: A for setting timeTrigger, D for increasing outputCnt and setting next count. +; Memory locations in use: Memory Address for oc5 timer, outputCnt, timeTrigger, numPoints, interval +; +; Comments: The timer will stop after outputCnt == numPoints +; + oc5isr ldd interval ; Load the interval for the next clock cycle addd TC5H ; for next interrupt std TC5H ; @@ -262,6 +277,23 @@ oc5isr ldd interval ; Load the interval for the next clock c jsr StopTimerCH5 ; Stop Channel 5 Timer oc5Done RTI ; Return from interrupt +;************************************************************************* +; PrintWave subroutine +; +; This subroutine will print a one byte decimal value to the serial console. +; The outputVal will be incremented by increment. It can follow a square wave, +; a triangle wave, & a sawtooth wave pattern. +; +; Input: waveType to denote the patter, increment to increment the outputVal +; Output: outputVal printed to the serial console +; Registers in use: A for finding the wave type, B for reading the outputVal, +; D for math and checking of outputVal +; Memory locations in use: waveType to set the patter, outputVal for printing +; the output value +; +; Comments: The timer will stop after outputCnt == numPoints +; + PrintWave pshd ; Save D to the stack pshy ; Save Y to the stack @@ -365,6 +397,20 @@ DonePrint stab outputVal ; Store updated output value puld ; Restore D from the stack rts ; Return from Caller +;************************************************************************* +; StartTimer5oc subroutine +; +; This subroutine will enable & start the oc5 timer. +; +; Input: Interval to set the next clock cycle +; Output: No output other +; Registers in use: A used for setting up the oc5 timer, D for setting the next trigger +; Memory locations in use: All memory locations used for the oc5 timer. +; interval to set the next cycle. +; +; Comments: The timer will be enabled only on channel 5 for output compare. +; + StartTimer5oc PSHD LDAA #%00100000 @@ -375,7 +421,7 @@ StartTimer5oc LDAA #%00000000 ; TOI Off, TCRE Off, TCLK = BCLK/1 STAA TSCR2 ; not needed if started from reset - LDD #3000 ; 125usec with (24MHz/1 clock) + LDD interval ; 125usec with (24MHz/1 clock) ADDD TCNTH ; for first interrupt STD TC5H ; @@ -385,6 +431,19 @@ StartTimer5oc PULD RTS +;************************************************************************* +; StopTimerCH5 subroutine +; +; This subroutine will stop and disable the timer. +; +; Input: No Input +; Output: No output other +; Registers in use: A to disable the timer. +; Memory locations in use: TIE to disable the timer. +; +; Comments: The timer will be disabled on all channels. +; + StopTimerCH5 psha ; Save A to the stack clra ; Clear A @@ -392,6 +451,23 @@ StopTimerCH5 pula ; Restore A from the stack rts ; Return +;************************************************************************* +; GenWave subroutine +; +; This subroutine will setup the proper variables to generate a wave and wait +; for the wave to finish generating. +; +; Input: No input but the variables for PrintWave are required. +; Output: No output except for the output of PrintWave +; Registers in use: A for reading the timeTrigger variable, +; D for reading outputCnt. +; Memory locations in use: outputCnt, outputVal, timeTrigger, numPoints. +; +; Comments: This subroutine does not have any direct input or output but calls +; PrintWave so the inputs for PrintWave should be set and the output +; of PrintWave should be expected. +; + GenWave pshd ; Save D to the stack ldd #0 ; Clear D @@ -400,7 +476,6 @@ GenWave jsr StartTimer5oc ; Start Timer on CH5 - genLoop ldaa timeTrigger ; Load timeTrigger into A beq genLoop ; If A == 0, loop clra ; Clear A @@ -966,7 +1041,7 @@ getchar7 clra ; Set A to 0 badInput dc.b 'Invalid Input',CR,LF,NULL ; Invalid Input Prompt ; twMsg: welcome message for typewrite -twMsg dc.b CR,LF,'Clock stopped and Typewrite program started.',CR,LF +twMsg dc.b 'Wave Generator and Clock stopped and Typewrite program started.',CR,LF dc.b 'You may type below.',CR,LF,NULL ; Messages for different waveforms |