This document contains the source code for a uVision project that initializes GPIO port F on an LM4F120 microcontroller. It includes initialization code to configure port F pins for input switches and output LEDs. The main loop continuously reads the switch inputs and sets the LED outputs accordingly to indicate whether a door is locked or unlocked based on the switch states.

1. eece237lab2/EECE237Lab2.uvproj
1.1
### uVision Project, (C) Keil Software
EECE237Lab2
0x4
ARM-ADS
LM4F120H5QR
Texas Instruments
IRAM(0x20000000-0x20007FFF) IROM(0-0x3FFFF)
CLOCK(16000000) CPUTYPE("Cortex-M4") FPU2
"STARTUPLuminaryStartup.s" ("Luminary Startup
Code")
UL2CM3(-O207 -S0 -C0 -FO7 -FD20000000 -FC800 -
FN1 -FF0LM4F_256 -FS00 -FL040000)
5995
LM4Fxxxx.H

2. SFDLuminaryLM4F120H5QR.SFR
0
0
Luminary
Luminary
0
0
0
0
1
.
Lab1
1
0
0
1
1
.
1
0
0
0
0
0
0
0

3. 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
3

4. 1
SARMCM3.DLL
-MPU
DCM.DLL
-pCM4
SARMCM3.DLL
-MPU
TCM.DLL
-pCM4
1
0
0
0
16
0
1
1
1
1
1
1
1
0
1
1
1

5. 1
1
1
1
0
1
0
1
0
3
BINlmidk-agdi.dll
1
0
0
1
1
4097

6. 1
BINlmidk-agdi.dll
"" ()
0
0
1
1
1
1
1
1
1
0
1
1
0
1
1
0
0
1
1
1
1
1
1
1
1
1

7. 0
0
"Cortex-M4"
0
0
0
1
1
0
0
1
0
0
8
0
0
0
3
3
0
0
0
0
0
0
0
0
0
0
1
0
0
0
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1

8. 0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x20000000
0x8000

9. 1
0x0
0x40000
0
0x0
0x0
1
0x0
0x0
1
0x0
0x0
1
0x0
0x0
1
0x0
0x40000
1
0x0
0x0

10. 0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x20000000
0x8000
0
0x0
0x0
1
1
0
0
0
0
0

11. 0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0

12. 0
1
0
0x00000000
0x20000000
Source Code
main2.s
2
.main2.s
startup.s
2
.startup.s

13. eece237lab2/main2.s
;****************** main.s ***************
; Program written by: ***Your Name Here***
; Date Created: 1/30/2015
; EECE237 Fall Semester 2016
; Lab number: 2
; The overall objective of this system is a simple user interface
; Hardware connections
; PF0 is switch input (1 means switch is not pressed, 0 means
switch is pressed)
; PF44 is switch input (1 means switch is not pressed, 0 means
switch is pressed)
; PF1, 2, 3 are LED output (0 means door is locked, 1 means
door is unlocked)
; The specific operation of this system is to unlock if both
switches are pressed
; Useful declarations
THUMB

14. ; PortF register declarations
GPIO_PORTF_DATA_R EQU 0x400253FC
GPIO_PORTF_DIR_R EQU 0x40025400
GPIO_PORTF_AFSEL_R EQU 0x40025420
GPIO_PORTF_PUR_R EQU 0x40025510
GPIO_PORTF_DEN_R EQU 0x4002551C
GPIO_PORTF_LOCK_R EQU 0x40025520
GPIO_PORTF_CR_R EQU 0x40025524
GPIO_PORTF_AMSEL_R EQU 0x40025528
GPIO_PORTF_PCTL_R EQU 0x4002552C
GPIO_LOCK_KEY EQU 0x4C4F434B ; Unlocks the
GPIO_CR register
SYSCTL_RCGC2_R EQU 0x400FE108
SYSCTL_RCGC2_GPIOF EQU 0x00000020 ; port F Clock
Gating Control
AREA DATA, ALIGN=2
; Global variables go here, you will not need any in
lab2.

15. ALIGN ; make sure the end of this section is aligned
AREA |.text|, CODE, READONLY, ALIGN=2
EXPORT Start
Start
; Write initialization code here. This segment is only executed
once at reset
;------------PortF_Init------------
; Initialize GPIO Port F for negative logic switches on PF0 and
; PF4 to match Launchpad wiring. Weak internal pull-up
; resistors are enabled, and the NMI functionality on PF0 is
; disabled. R,G, and B LED's Pins (PF1-PF3) set as outputs.
; Follows Valvano Text program 4.1.
; Input: none
; Output: none
; Modifies: R0, R1, R2
PortF_Init

16. LDR R1, =SYSCTL_RCGC2_R ; 1) activate clock for
Port F
LDR R0, [R1]
ORR R0, R0, #0x20 ; set bit 5 to turn on clock
STR R0, [R1]
NOP
NOP ; allow time for clock to finish
; 2) unlock the
lock register
; unlock GPIO
Port F Commit Register
; enable commit
for Port F
; 1 means allow
access
; 3) disable
analog functionality
; 0 means analog
is off
; 4) configure as
GPIO
; 0 means
configure Port F as GPIO

17. ; 5) set direction
register
; PF0 and PF7-4
input, PF3-1 output
; 6) regular port
function
; 0 means disable
alternate function
; pull-up resistors
for PF4,PF0
; enable weak
pull-up on PF0 and PF4
; 7) enable Port F
digital port
; 1 means enable
digital I/O
mainloop
; Write your main program here. This segment
loops indefinitely while the microcontroller is on

18. ; You must use the Portf_Input and Portf_Output
functions to access PortF
B mainloop ;infinite main loop
; Useful Functions
; (From Valvano Text Program 4.1)
;------------PortF_Input------
; Read ProtF
; Input: none
; Output: R0 value read from PortF
; Modifies: R1
PortF_Input
LDR R1, =GPIO_PORTF_DATA_R ; pointer to Port F
data
LDR R0, [R1] ; read all of PortF
AND R0,R0,#0x11 ; just the input
pins, bits 4,0
BX LR ; return R0 with inputs

19. ;------------PortF_Output------
; Set the output state of PF3-1.
; Input: R0 new state of PF
; Output: none
; Modifies: R1
PortF_Output
LDR R1, =GPIO_PORTF_DATA_R ; pointer to Port F
data
STR R0, [R1] ; write to PF3-1
BX LR
ALIGN ; make sure the end of this section is aligned (For
the code/data to follow)
END ; mark end of file
eece237lab2/startup.s
; <<< Use Configuration Wizard in Context Menu >>>
;****************************************************
**************************

20. ;
; startup_rvmdk.S - Startup code for use with Keil's uVision.
;
; Copyright (c) 2012 Texas Instruments Incorporated. All rights
reserved.
; Software License Agreement
;
; Texas Instruments (TI) is supplying this software for use
solely and
; exclusively on TI's microcontroller products. The software is
owned by
; TI and/or its suppliers, and is protected under applicable
copyright
; laws. You may not combine this software with "viral" open-
source
; software in order to form a larger program.
;
; THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL
FAULTS.
; NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR
STATUTORY, INCLUDING, BUT

21. ; NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
TI SHALL NOT, UNDER ANY
; CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL
; DAMAGES, FOR ANY REASON WHATSOEVER.
;
; This is part of revision 9453 of the EK-LM4F120XL Firmware
Package.
;
;****************************************************
**************************
; Edited to conform with ISR names as described in
; "Embedded Systems: Introduction to ARM Cortex M
Microcontrollers",
; ISBN: 978-1469998749, Jonathan Valvano, copyright (c)
2012
; "Embedded Systems: Real Time Interfacing to ARM Cortex
M Microcontrollers",
; ISBN: 978-1463590154, Jonathan Valvano, copyright (c)
2012
; "Embedded Systems: Real-Time Operating Systems for ARM

22. Cortex M Microcontrollers",
; ISBN: 978-1466468863, Jonathan Valvano, copyright (c)
2013
;
;****************************************************
**************************
;
; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
;
;****************************************************
**************************
Stack EQU 0x00000400
;****************************************************
**************************
;
; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
;
;****************************************************
**************************
Heap EQU 0x00000000

23. ;****************************************************
**************************
;
; Allocate space for the stack.
;
;****************************************************
**************************
AREA STACK, NOINIT, READWRITE, ALIGN=3
StackMem
SPACE Stack
__initial_sp
;****************************************************
**************************
;
; Allocate space for the heap.
;
;****************************************************
**************************

24. AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
HeapMem
SPACE Heap
__heap_limit
;****************************************************
**************************
;
; Indicate that the code in this file preserves 8-byte alignment of
the stack.
;
;****************************************************
**************************
PRESERVE8
;****************************************************
**************************
;
; Place code into the reset code section.

25. ;
;****************************************************
**************************
AREA RESET, CODE, READONLY
THUMB
;****************************************************
**************************
;
; The vector table.
;
;****************************************************
**************************
EXPORT __Vectors
__Vectors
DCD StackMem + Stack ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NMI_Handler ; NMI Handler
DCD HardFault_Handler ; Hard Fault Handler

26. DCD MemManage_Handler ; MPU Fault Handler
DCD BusFault_Handler ; Bus Fault Handler
DCD UsageFault_Handler ; Usage Fault Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD SVC_Handler ; SVCall Handler
DCD DebugMon_Handler ; Debug Monitor
Handler
DCD 0 ; Reserved
DCD PendSV_Handler ; PendSV Handler
DCD SysTick_Handler ; SysTick Handler
DCD GPIOPortA_Handler ; GPIO Port A
DCD GPIOPortB_Handler ; GPIO Port B
DCD GPIOPortC_Handler ; GPIO Port C
DCD GPIOPortD_Handler ; GPIO Port D
DCD GPIOPortE_Handler ; GPIO Port E
DCD UART0_Handler ; UART0 Rx and Tx

27. DCD UART1_Handler ; UART1 Rx and Tx
DCD SSI0_Handler ; SSI0 Rx and Tx
DCD I2C0_Handler ; I2C0 Master and Slave
DCD PWM0Fault_Handler ; PWM 0 Fault
DCD PWM0Generator0_Handler ; PWM 0 Generator
0
DCD PWM0Generator1_Handler ; PWM 0 Generator
1
DCD PWM0Generator2_Handler ; PWM 0 Generator
2
DCD Quadrature0_Handler ; Quadrature Encoder 0
DCD ADC0Seq0_Handler ; ADC0 Sequence 0
DCD ADC0Seq1_Handler ; ADC0 Sequence 1
DCD ADC0Seq1_Handler ; ADC0 Sequence 2
DCD ADC0Seq1_Handler ; ADC0 Sequence 3
DCD WDT_Handler ; Watchdog
DCD Timer0A_Handler ; Timer 0 subtimer A
DCD Timer0B_Handler ; Timer 0 subtimer B
DCD Timer1A_Handler ; Timer 1 subtimer A

28. DCD Timer1B_Handler ; Timer 1 subtimer B
DCD Timer2A_Handler ; Timer 2 subtimer A
DCD Timer2B_Handler ; Timer 2 subtimer B
DCD Comp0_Handler ; Analog Comp 0
DCD Comp1_Handler ; Analog Comp 1
DCD Comp2_Handler ; Analog Comp 2
DCD SysCtl_Handler ; System Control
DCD FlashCtl_Handler ; Flash Control
DCD GPIOPortF_Handler ; GPIO Port F
DCD GPIOPortG_Handler ; GPIO Port G
DCD GPIOPortH_Handler ; GPIO Port H
DCD UART2_Handler ; UART2 Rx and Tx
DCD SSI1_Handler ; SSI1 Rx and Tx
DCD Timer3A_Handler ; Timer 3 subtimer A
DCD Timer3B_Handler ; Timer 3 subtimer B
DCD I2C1_Handler ; I2C1 Master and Slave
DCD Quadrature1_Handler ; Quadrature Encoder 1
DCD CAN0_Handler ; CAN0

29. DCD CAN1_Handler ; CAN1
DCD CAN2_Handler ; CAN2
DCD Ethernet_Handler ; Ethernet
DCD Hibernate_Handler ; Hibernate
DCD USB0_Handler ; USB0
DCD PWM0Generator3_Handler ; PWM 0 Generator
3
DCD uDMA_Handler ; uDMA Software
Transfer
DCD uDMA_Error ; uDMA Error
DCD ADC1Seq0_Handler ; ADC1 Sequence 0
DCD ADC1Seq1_Handler ; ADC1 Sequence 1
DCD ADC1Seq2_Handler ; ADC1 Sequence 2
DCD ADC1Seq3_Handler ; ADC1 Sequence 3
DCD I2S0_Handler ; I2S0
DCD ExtBus_Handler ; External Bus Interface
0
DCD GPIOPortJ_Handler ; GPIO Port J
DCD GPIOPortK_Handler ; GPIO Port K
DCD GPIOPortL_Handler ; GPIO Port L

30. DCD SSI2_Handler ; SSI2 Rx and Tx
DCD SSI3_Handler ; SSI3 Rx and Tx
DCD UART3_Handler ; UART3 Rx and Tx
DCD UART4_Handler ; UART4 Rx and Tx
DCD UART5_Handler ; UART5 Rx and Tx
DCD UART6_Handler ; UART6 Rx and Tx
DCD UART7_Handler ; UART7 Rx and Tx
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD I2C2_Handler ; I2C2 Master and Slave
DCD I2C3_Handler ; I2C3 Master and Slave
DCD Timer4A_Handler ; Timer 4 subtimer A
DCD Timer4B_Handler ; Timer 4 subtimer B
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved

31. DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD Timer5A_Handler ; Timer 5 subtimer A

32. DCD Timer5B_Handler ; Timer 5 subtimer B
DCD WideTimer0A_Handler ; Wide Timer 0
subtimer A
DCD WideTimer0B_Handler ; Wide Timer 0
subtimer B
DCD WideTimer1A_Handler ; Wide Timer 1
subtimer A
DCD WideTimer1B_Handler ; Wide Timer 1
subtimer B
DCD WideTimer2A_Handler ; Wide Timer 2
subtimer A
DCD WideTimer2B_Handler ; Wide Timer 2
subtimer B
DCD WideTimer3A_Handler ; Wide Timer 3
subtimer A
DCD WideTimer3B_Handler ; Wide Timer 3
subtimer B
DCD WideTimer4A_Handler ; Wide Timer 4
subtimer A
DCD WideTimer4B_Handler ; Wide Timer 4
subtimer B
DCD WideTimer5A_Handler ; Wide Timer 5
subtimer A

33. DCD WideTimer5B_Handler ; Wide Timer 5
subtimer B
DCD FPU_Handler ; FPU
DCD PECI0_Handler ; PECI 0
DCD LPC0_Handler ; LPC 0
DCD I2C4_Handler ; I2C4 Master and Slave
DCD I2C5_Handler ; I2C5 Master and Slave
DCD GPIOPortM_Handler ; GPIO Port M
DCD GPIOPortN_Handler ; GPIO Port N
DCD Quadrature2_Handler ; Quadrature Encoder 2
DCD Fan0_Handler ; Fan 0
DCD 0 ; Reserved
DCD GPIOPortP_Handler ; GPIO Port P
(Summary or P0)
DCD GPIOPortP1_Handler ; GPIO Port P1
DCD GPIOPortP2_Handler ; GPIO Port P2
DCD GPIOPortP3_Handler ; GPIO Port P3
DCD GPIOPortP4_Handler ; GPIO Port P4
DCD GPIOPortP5_Handler ; GPIO Port P5

34. DCD GPIOPortP6_Handler ; GPIO Port P6
DCD GPIOPortP7_Handler ; GPIO Port P7
DCD GPIOPortQ_Handler ; GPIO Port Q
(Summary or Q0)
DCD GPIOPortQ1_Handler ; GPIO Port Q1
DCD GPIOPortQ2_Handler ; GPIO Port Q2
DCD GPIOPortQ3_Handler ; GPIO Port Q3
DCD GPIOPortQ4_Handler ; GPIO Port Q4
DCD GPIOPortQ5_Handler ; GPIO Port Q5
DCD GPIOPortQ6_Handler ; GPIO Port Q6
DCD GPIOPortQ7_Handler ; GPIO Port Q7
DCD GPIOPortR_Handler ; GPIO Port R
DCD GPIOPortS_Handler ; GPIO Port S
DCD PWM1Generator0_Handler ; PWM 1 Generator
0
DCD PWM1Generator1_Handler ; PWM 1 Generator
1
DCD PWM1Generator2_Handler ; PWM 1 Generator
2
DCD PWM1Generator3_Handler ; PWM 1 Generator
3

35. DCD PWM1Fault_Handler ; PWM 1 Fault
;****************************************************
**************************
;
; This is the code that gets called when the processor first starts
execution
; following a reset event.
;
;****************************************************
**************************
EXPORT Reset_Handler
Reset_Handler
;
; DO NOT Enable the floating-point unit. This must be
done here to handle the
; case where main() uses floating-point and the function
prologue saves
; floating-point registers (which will fault if floating-point
is not
; enabled). Any configuration of the floating-point unit

36. using
; DriverLib APIs must be done here prior to the floating-
point unit
; being enabled.
;
; Note that this does not use DriverLib since it might not
be included
; in this project.
;
; MOVW R0, #0xED88
; MOVT R0, #0xE000
; LDR R1, [R0]
; ORR R1, #0x00F00000
; STR R1, [R0]
;
; Call the C library enty point that handles startup. This
will copy
; the .data section initializers from flash to SRAM and
zero fill the

37. ; .bss section.
;
IMPORT Start
B Start ;call user assembly language program
;****************************************************
**************************
;
; This is the code that gets called when the processor receives a
NMI. This
; simply enters an infinite loop, preserving the system state for
examination
; by a debugger.
;
;****************************************************
**************************
NMI_Handler PROC
EXPORT NMI_Handler [WEAK]
B .
ENDP

38. ;****************************************************
**************************
;
; This is the code that gets called when the processor receives a
fault
; interrupt. This simply enters an infinite loop, preserving the
system state
; for examination by a debugger.
;
;****************************************************
**************************
HardFault_Handler
PROC
EXPORT HardFault_Handler [WEAK]
B .
ENDP
MemManage_Handler
PROC

39. EXPORT MemManage_Handler [WEAK]
B .
ENDP
BusFault_Handler
PROC
EXPORT BusFault_Handler [WEAK]
B .
ENDP
UsageFault_Handler
PROC
EXPORT UsageFault_Handler [WEAK]
B .
ENDP
SVC_Handler PROC
EXPORT SVC_Handler [WEAK]
B .
ENDP
DebugMon_Handler

40. PROC
EXPORT DebugMon_Handler [WEAK]
B .
ENDP
PendSV_Handler PROC
EXPORT PendSV_Handler [WEAK]
B .
ENDP
SysTick_Handler PROC
EXPORT SysTick_Handler [WEAK]
B .
ENDP
IntDefaultHandler
PROC
EXPORT GPIOPortA_Handler [WEAK]
EXPORT GPIOPortB_Handler [WEAK]
EXPORT GPIOPortC_Handler [WEAK]

41. EXPORT GPIOPortD_Handler [WEAK]
EXPORT GPIOPortE_Handler [WEAK]
EXPORT UART0_Handler [WEAK]
EXPORT UART1_Handler [WEAK]
EXPORT SSI0_Handler [WEAK]
EXPORT I2C0_Handler [WEAK]
EXPORT PWM0Fault_Handler [WEAK]
EXPORT PWM0Generator0_Handler [WEAK]
EXPORT PWM0Generator1_Handler [WEAK]
EXPORT PWM0Generator2_Handler [WEAK]
EXPORT Quadrature0_Handler [WEAK]
EXPORT ADC0Seq0_Handler [WEAK]
EXPORT ADC0Seq1_Handler [WEAK]
EXPORT ADC0Seq2_Handler [WEAK]
EXPORT ADC0Seq3_Handler [WEAK]
EXPORT WDT_Handler [WEAK]
EXPORT Timer0A_Handler [WEAK]
EXPORT Timer0B_Handler [WEAK]

42. EXPORT Timer1A_Handler [WEAK]
EXPORT Timer1B_Handler [WEAK]
EXPORT Timer2A_Handler [WEAK]
EXPORT Timer2B_Handler [WEAK]
EXPORT Comp0_Handler [WEAK]
EXPORT Comp1_Handler [WEAK]
EXPORT Comp2_Handler [WEAK]
EXPORT SysCtl_Handler [WEAK]
EXPORT FlashCtl_Handler [WEAK]
EXPORT GPIOPortF_Handler [WEAK]
EXPORT GPIOPortG_Handler [WEAK]
EXPORT GPIOPortH_Handler [WEAK]
EXPORT UART2_Handler [WEAK]
EXPORT SSI1_Handler [WEAK]
EXPORT Timer3A_Handler [WEAK]
EXPORT Timer3B_Handler [WEAK]
EXPORT I2C1_Handler [WEAK]
EXPORT Quadrature1_Handler [WEAK]

43. EXPORT CAN0_Handler [WEAK]
EXPORT CAN1_Handler [WEAK]
EXPORT CAN2_Handler [WEAK]
EXPORT Ethernet_Handler [WEAK]
EXPORT Hibernate_Handler [WEAK]
EXPORT USB0_Handler [WEAK]
EXPORT PWM0Generator3_Handler [WEAK]
EXPORT uDMA_Handler [WEAK]
EXPORT uDMA_Error [WEAK]
EXPORT ADC1Seq0_Handler [WEAK]
EXPORT ADC1Seq1_Handler [WEAK]
EXPORT ADC1Seq2_Handler [WEAK]
EXPORT ADC1Seq3_Handler [WEAK]
EXPORT I2S0_Handler [WEAK]
EXPORT ExtBus_Handler [WEAK]
EXPORT GPIOPortJ_Handler [WEAK]
EXPORT GPIOPortK_Handler [WEAK]
EXPORT GPIOPortL_Handler [WEAK]

44. EXPORT SSI2_Handler [WEAK]
EXPORT SSI3_Handler [WEAK]
EXPORT UART3_Handler [WEAK]
EXPORT UART4_Handler [WEAK]
EXPORT UART5_Handler [WEAK]
EXPORT UART6_Handler [WEAK]
EXPORT UART7_Handler [WEAK]
EXPORT I2C2_Handler [WEAK]
EXPORT I2C3_Handler [WEAK]
EXPORT Timer4A_Handler [WEAK]
EXPORT Timer4B_Handler [WEAK]
EXPORT Timer5A_Handler [WEAK]
EXPORT Timer5B_Handler [WEAK]
EXPORT WideTimer0A_Handler [WEAK]
EXPORT WideTimer0B_Handler [WEAK]
EXPORT WideTimer1A_Handler [WEAK]
EXPORT WideTimer1B_Handler [WEAK]
EXPORT WideTimer2A_Handler [WEAK]

45. EXPORT WideTimer2B_Handler [WEAK]
EXPORT WideTimer3A_Handler [WEAK]
EXPORT WideTimer3B_Handler [WEAK]
EXPORT WideTimer4A_Handler [WEAK]
EXPORT WideTimer4B_Handler [WEAK]
EXPORT WideTimer5A_Handler [WEAK]
EXPORT WideTimer5B_Handler [WEAK]
EXPORT FPU_Handler [WEAK]
EXPORT PECI0_Handler [WEAK]
EXPORT LPC0_Handler [WEAK]
EXPORT I2C4_Handler [WEAK]
EXPORT I2C5_Handler [WEAK]
EXPORT GPIOPortM_Handler [WEAK]
EXPORT GPIOPortN_Handler [WEAK]
EXPORT Quadrature2_Handler [WEAK]
EXPORT Fan0_Handler [WEAK]
EXPORT GPIOPortP_Handler [WEAK]
EXPORT GPIOPortP1_Handler [WEAK]

46. EXPORT GPIOPortP2_Handler [WEAK]
EXPORT GPIOPortP3_Handler [WEAK]
EXPORT GPIOPortP4_Handler [WEAK]
EXPORT GPIOPortP5_Handler [WEAK]
EXPORT GPIOPortP6_Handler [WEAK]
EXPORT GPIOPortP7_Handler [WEAK]
EXPORT GPIOPortQ_Handler [WEAK]
EXPORT GPIOPortQ1_Handler [WEAK]
EXPORT GPIOPortQ2_Handler [WEAK]
EXPORT GPIOPortQ3_Handler [WEAK]
EXPORT GPIOPortQ4_Handler [WEAK]
EXPORT GPIOPortQ5_Handler [WEAK]
EXPORT GPIOPortQ6_Handler [WEAK]
EXPORT GPIOPortQ7_Handler [WEAK]
EXPORT GPIOPortR_Handler [WEAK]
EXPORT GPIOPortS_Handler [WEAK]
EXPORT PWM1Generator0_Handler [WEAK]
EXPORT PWM1Generator1_Handler [WEAK]

47. EXPORT PWM1Generator2_Handler [WEAK]
EXPORT PWM1Generator3_Handler [WEAK]
EXPORT PWM1Fault_Handler [WEAK]
GPIOPortA_Handler
GPIOPortB_Handler
GPIOPortC_Handler
GPIOPortD_Handler
GPIOPortE_Handler
UART0_Handler
UART1_Handler
SSI0_Handler
I2C0_Handler
PWM0Fault_Handler
PWM0Generator0_Handler
PWM0Generator1_Handler
PWM0Generator2_Handler
Quadrature0_Handler

48. ADC0Seq0_Handler
ADC0Seq1_Handler
ADC0Seq2_Handler
ADC0Seq3_Handler
WDT_Handler
Timer0A_Handler
Timer0B_Handler
Timer1A_Handler
Timer1B_Handler
Timer2A_Handler
Timer2B_Handler
Comp0_Handler
Comp1_Handler
Comp2_Handler
SysCtl_Handler
FlashCtl_Handler
GPIOPortF_Handler
GPIOPortG_Handler

49. GPIOPortH_Handler
UART2_Handler
SSI1_Handler
Timer3A_Handler
Timer3B_Handler
I2C1_Handler
Quadrature1_Handler
CAN0_Handler
CAN1_Handler
CAN2_Handler
Ethernet_Handler
Hibernate_Handler
USB0_Handler
PWM0Generator3_Handler
uDMA_Handler
uDMA_Error
ADC1Seq0_Handler
ADC1Seq1_Handler

50. ADC1Seq2_Handler
ADC1Seq3_Handler
I2S0_Handler
ExtBus_Handler
GPIOPortJ_Handler
GPIOPortK_Handler
GPIOPortL_Handler
SSI2_Handler
SSI3_Handler
UART3_Handler
UART4_Handler
UART5_Handler
UART6_Handler
UART7_Handler
I2C2_Handler
I2C3_Handler
Timer4A_Handler
Timer4B_Handler

51. Timer5A_Handler
Timer5B_Handler
WideTimer0A_Handler
WideTimer0B_Handler
WideTimer1A_Handler
WideTimer1B_Handler
WideTimer2A_Handler
WideTimer2B_Handler
WideTimer3A_Handler
WideTimer3B_Handler
WideTimer4A_Handler
WideTimer4B_Handler
WideTimer5A_Handler
WideTimer5B_Handler
FPU_Handler
PECI0_Handler
LPC0_Handler
I2C4_Handler

52. I2C5_Handler
GPIOPortM_Handler
GPIOPortN_Handler
Quadrature2_Handler
Fan0_Handler
GPIOPortP_Handler
GPIOPortP1_Handler
GPIOPortP2_Handler
GPIOPortP3_Handler
GPIOPortP4_Handler
GPIOPortP5_Handler
GPIOPortP6_Handler
GPIOPortP7_Handler
GPIOPortQ_Handler
GPIOPortQ1_Handler
GPIOPortQ2_Handler
GPIOPortQ3_Handler
GPIOPortQ4_Handler

53. GPIOPortQ5_Handler
GPIOPortQ6_Handler
GPIOPortQ7_Handler
GPIOPortR_Handler
GPIOPortS_Handler
PWM1Generator0_Handler
PWM1Generator1_Handler
PWM1Generator2_Handler
PWM1Generator3_Handler
PWM1Fault_Handler
B .
ENDP
;****************************************************
**************************
;
; Make sure the end of this section is aligned.

54. ;
;****************************************************
**************************
ALIGN
;****************************************************
**************************
;
; Some code in the normal code section for initializing the heap
and stack.
;
;****************************************************
**************************
AREA |.text|, CODE, READONLY
;****************************************************
**************************
;
; Useful functions.
;

55. ;****************************************************
**************************
EXPORT DisableInterrupts
EXPORT EnableInterrupts
EXPORT StartCritical
EXPORT EndCritical
EXPORT WaitForInterrupt
;*********** DisableInterrupts ***************
; disable interrupts
; inputs: none
; outputs: none
DisableInterrupts
CPSID I
BX LR
;*********** EnableInterrupts ***************
; disable interrupts
; inputs: none

56. ; outputs: none
EnableInterrupts
CPSIE I
BX LR
;*********** StartCritical ************************
; make a copy of previous I bit, disable interrupts
; inputs: none
; outputs: previous I bit
StartCritical
MRS R0, PRIMASK ; save old status
CPSID I ; mask all (except faults)
BX LR
;*********** EndCritical ************************
; using the copy of previous I bit, restore I bit to previous value
; inputs: previous I bit
; outputs: none

57. EndCritical
MSR PRIMASK, R0
BX LR
;*********** WaitForInterrupt ************************
; go to low power mode while waiting for the next interrupt
; inputs: none
; outputs: none
WaitForInterrupt
WFI
BX LR
;****************************************************
**************************
;
; Make sure the end of this section is aligned.

58. ;
;****************************************************
**************************
ALIGN
;****************************************************
**************************
;
; Tell the assembler that we're done.
;
;****************************************************
**************************
END
eece237lab2/EECE237Lab2.uvproj
1.1
### uVision Project, (C) Keil Software
EECE237Lab2

59. 0x4
ARM-ADS
LM4F120H5QR
Texas Instruments
IRAM(0x20000000-0x20007FFF) IROM(0-0x3FFFF)
CLOCK(16000000) CPUTYPE("Cortex-M4") FPU2
"STARTUPLuminaryStartup.s" ("Luminary Startup
Code")
UL2CM3(-O207 -S0 -C0 -FO7 -FD20000000 -FC800 -
FN1 -FF0LM4F_256 -FS00 -FL040000)
5995
LM4Fxxxx.H
SFDLuminaryLM4F120H5QR.SFR
0
0
Luminary
Luminary
0
0
0

60. 0
1
.
Lab1
1
0
0
1
1
.
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

61. 0
0
0
0
0
0
0
0
0
1
0
0
0
0
3
1
SARMCM3.DLL
-MPU
DCM.DLL
-pCM4
SARMCM3.DLL
-MPU
TCM.DLL
-pCM4

62. 1
0
0
0
16
0
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
0
1
0
1
0
3

63. BINlmidk-agdi.dll
1
0
0
1
1
4097
1
BINlmidk-agdi.dll
"" ()
0
0
1
1

64. 1
1
1
1
1
0
1
1
0
1
1
0
0
1
1
1
1
1
1
1
1
1
0
0
"Cortex-M4"
0
0
0
1
1
0
0
1
0
0

65. 8
0
0
0
3
3
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0x0
0x0
0
0x0
0x0
0

66. 0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x20000000
0x8000
1
0x0
0x40000
0
0x0
0x0
1
0x0

67. 0x0
1
0x0
0x0
1
0x0
0x0
1
0x0
0x40000
1
0x0
0x0
0
0x0
0x0
0
0x0
0x0
0
0x0
0x0

68. 0
0x20000000
0x8000
0
0x0
0x0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0

69. 1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0x00000000
0x20000000

70. Source Code
main2.s
2
.main2.s
startup.s
2
.startup.s
eece237lab2/main2.s
;****************** main.s ***************
; Program written by: ***Your Name Here***
; Date Created: 1/30/2015
; EECE237 Fall Semester 2016
; Lab number: 2
; The overall objective of this system is a simple user interface

71. ; Hardware connections
; PF0 is switch input (1 means switch is not pressed, 0 means
switch is pressed)
; PF44 is switch input (1 means switch is not pressed, 0 means
switch is pressed)
; PF1, 2, 3 are LED output (0 means door is locked, 1 means
door is unlocked)
; The specific operation of this system is to unlock if both
switches are pressed
; Useful declarations
THUMB
; PortF register declarations
GPIO_PORTF_DATA_R EQU 0x400253FC
GPIO_PORTF_DIR_R EQU 0x40025400
GPIO_PORTF_AFSEL_R EQU 0x40025420
GPIO_PORTF_PUR_R EQU 0x40025510
GPIO_PORTF_DEN_R EQU 0x4002551C
GPIO_PORTF_LOCK_R EQU 0x40025520

72. GPIO_PORTF_CR_R EQU 0x40025524
GPIO_PORTF_AMSEL_R EQU 0x40025528
GPIO_PORTF_PCTL_R EQU 0x4002552C
GPIO_LOCK_KEY EQU 0x4C4F434B ; Unlocks the
GPIO_CR register
SYSCTL_RCGC2_R EQU 0x400FE108
SYSCTL_RCGC2_GPIOF EQU 0x00000020 ; port F Clock
Gating Control
AREA DATA, ALIGN=2
; Global variables go here, you will not need any in
lab2.
ALIGN ; make sure the end of this section is aligned
AREA |.text|, CODE, READONLY, ALIGN=2
EXPORT Start
Start
; Write initialization code here. This segment is only executed
once at reset

73. ;------------PortF_Init------------
; Initialize GPIO Port F for negative logic switches on PF0 and
; PF4 to match Launchpad wiring. Weak internal pull-up
; resistors are enabled, and the NMI functionality on PF0 is
; disabled. R,G, and B LED's Pins (PF1-PF3) set as outputs.
; Follows Valvano Text program 4.1.
; Input: none
; Output: none
; Modifies: R0, R1, R2
PortF_Init
LDR R1, =SYSCTL_RCGC2_R ; 1) activate clock for
Port F
LDR R0, [R1]
ORR R0, R0, #0x20 ; set bit 5 to turn on clock
STR R0, [R1]
NOP
NOP ; allow time for clock to finish
; 2) unlock the

74. lock register
; unlock GPIO
Port F Commit Register
; enable commit
for Port F
; 1 means allow
access
; 3) disable
analog functionality
; 0 means analog
is off
; 4) configure as
GPIO
; 0 means
configure Port F as GPIO
; 5) set direction
register
; PF0 and PF7-4
input, PF3-1 output
; 6) regular port
function
; 0 means disable
alternate function
; pull-up resistors

75. for PF4,PF0
; enable weak
pull-up on PF0 and PF4
; 7) enable Port F
digital port
; 1 means enable
digital I/O
mainloop
; Write your main program here. This segment
loops indefinitely while the microcontroller is on
; You must use the Portf_Input and Portf_Output
functions to access PortF
B mainloop ;infinite main loop
; Useful Functions
; (From Valvano Text Program 4.1)
;------------PortF_Input------

76. ; Read ProtF
; Input: none
; Output: R0 value read from PortF
; Modifies: R1
PortF_Input
LDR R1, =GPIO_PORTF_DATA_R ; pointer to Port F
data
LDR R0, [R1] ; read all of PortF
AND R0,R0,#0x11 ; just the input
pins, bits 4,0
BX LR ; return R0 with inputs
;------------PortF_Output------
; Set the output state of PF3-1.
; Input: R0 new state of PF
; Output: none
; Modifies: R1
PortF_Output
LDR R1, =GPIO_PORTF_DATA_R ; pointer to Port F

77. data
STR R0, [R1] ; write to PF3-1
BX LR
ALIGN ; make sure the end of this section is aligned (For
the code/data to follow)
END ; mark end of file
eece237lab2/startup.s
; <<< Use Configuration Wizard in Context Menu >>>
;****************************************************
**************************
;
; startup_rvmdk.S - Startup code for use with Keil's uVision.
;
; Copyright (c) 2012 Texas Instruments Incorporated. All rights
reserved.
; Software License Agreement
;

78. ; Texas Instruments (TI) is supplying this software for use
solely and
; exclusively on TI's microcontroller products. The software is
owned by
; TI and/or its suppliers, and is protected under applicable
copyright
; laws. You may not combine this software with "viral" open-
source
; software in order to form a larger program.
;
; THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL
FAULTS.
; NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR
STATUTORY, INCLUDING, BUT
; NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
TI SHALL NOT, UNDER ANY
; CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL
; DAMAGES, FOR ANY REASON WHATSOEVER.
;
; This is part of revision 9453 of the EK-LM4F120XL Firmware

79. Package.
;
;****************************************************
**************************
; Edited to conform with ISR names as described in
; "Embedded Systems: Introduction to ARM Cortex M
Microcontrollers",
; ISBN: 978-1469998749, Jonathan Valvano, copyright (c)
2012
; "Embedded Systems: Real Time Interfacing to ARM Cortex
M Microcontrollers",
; ISBN: 978-1463590154, Jonathan Valvano, copyright (c)
2012
; "Embedded Systems: Real-Time Operating Systems for ARM
Cortex M Microcontrollers",
; ISBN: 978-1466468863, Jonathan Valvano, copyright (c)
2013
;
;****************************************************
**************************
;
; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>

80. ;
;****************************************************
**************************
Stack EQU 0x00000400
;****************************************************
**************************
;
; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
;
;****************************************************
**************************
Heap EQU 0x00000000
;****************************************************
**************************
;
; Allocate space for the stack.
;
;****************************************************
**************************

81. AREA STACK, NOINIT, READWRITE, ALIGN=3
StackMem
SPACE Stack
__initial_sp
;****************************************************
**************************
;
; Allocate space for the heap.
;
;****************************************************
**************************
AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
HeapMem
SPACE Heap
__heap_limit
;****************************************************

82. **************************
;
; Indicate that the code in this file preserves 8-byte alignment of
the stack.
;
;****************************************************
**************************
PRESERVE8
;****************************************************
**************************
;
; Place code into the reset code section.
;
;****************************************************
**************************
AREA RESET, CODE, READONLY
THUMB
;****************************************************
**************************

83. ;
; The vector table.
;
;****************************************************
**************************
EXPORT __Vectors
__Vectors
DCD StackMem + Stack ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NMI_Handler ; NMI Handler
DCD HardFault_Handler ; Hard Fault Handler
DCD MemManage_Handler ; MPU Fault Handler
DCD BusFault_Handler ; Bus Fault Handler
DCD UsageFault_Handler ; Usage Fault Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved

84. DCD SVC_Handler ; SVCall Handler
DCD DebugMon_Handler ; Debug Monitor
Handler
DCD 0 ; Reserved
DCD PendSV_Handler ; PendSV Handler
DCD SysTick_Handler ; SysTick Handler
DCD GPIOPortA_Handler ; GPIO Port A
DCD GPIOPortB_Handler ; GPIO Port B
DCD GPIOPortC_Handler ; GPIO Port C
DCD GPIOPortD_Handler ; GPIO Port D
DCD GPIOPortE_Handler ; GPIO Port E
DCD UART0_Handler ; UART0 Rx and Tx
DCD UART1_Handler ; UART1 Rx and Tx
DCD SSI0_Handler ; SSI0 Rx and Tx
DCD I2C0_Handler ; I2C0 Master and Slave
DCD PWM0Fault_Handler ; PWM 0 Fault
DCD PWM0Generator0_Handler ; PWM 0 Generator
0
DCD PWM0Generator1_Handler ; PWM 0 Generator
1

85. DCD PWM0Generator2_Handler ; PWM 0 Generator
2
DCD Quadrature0_Handler ; Quadrature Encoder 0
DCD ADC0Seq0_Handler ; ADC0 Sequence 0
DCD ADC0Seq1_Handler ; ADC0 Sequence 1
DCD ADC0Seq1_Handler ; ADC0 Sequence 2
DCD ADC0Seq1_Handler ; ADC0 Sequence 3
DCD WDT_Handler ; Watchdog
DCD Timer0A_Handler ; Timer 0 subtimer A
DCD Timer0B_Handler ; Timer 0 subtimer B
DCD Timer1A_Handler ; Timer 1 subtimer A
DCD Timer1B_Handler ; Timer 1 subtimer B
DCD Timer2A_Handler ; Timer 2 subtimer A
DCD Timer2B_Handler ; Timer 2 subtimer B
DCD Comp0_Handler ; Analog Comp 0
DCD Comp1_Handler ; Analog Comp 1
DCD Comp2_Handler ; Analog Comp 2
DCD SysCtl_Handler ; System Control

86. DCD FlashCtl_Handler ; Flash Control
DCD GPIOPortF_Handler ; GPIO Port F
DCD GPIOPortG_Handler ; GPIO Port G
DCD GPIOPortH_Handler ; GPIO Port H
DCD UART2_Handler ; UART2 Rx and Tx
DCD SSI1_Handler ; SSI1 Rx and Tx
DCD Timer3A_Handler ; Timer 3 subtimer A
DCD Timer3B_Handler ; Timer 3 subtimer B
DCD I2C1_Handler ; I2C1 Master and Slave
DCD Quadrature1_Handler ; Quadrature Encoder 1
DCD CAN0_Handler ; CAN0
DCD CAN1_Handler ; CAN1
DCD CAN2_Handler ; CAN2
DCD Ethernet_Handler ; Ethernet
DCD Hibernate_Handler ; Hibernate
DCD USB0_Handler ; USB0
DCD PWM0Generator3_Handler ; PWM 0 Generator
3
DCD uDMA_Handler ; uDMA Software

87. Transfer
DCD uDMA_Error ; uDMA Error
DCD ADC1Seq0_Handler ; ADC1 Sequence 0
DCD ADC1Seq1_Handler ; ADC1 Sequence 1
DCD ADC1Seq2_Handler ; ADC1 Sequence 2
DCD ADC1Seq3_Handler ; ADC1 Sequence 3
DCD I2S0_Handler ; I2S0
DCD ExtBus_Handler ; External Bus Interface
0
DCD GPIOPortJ_Handler ; GPIO Port J
DCD GPIOPortK_Handler ; GPIO Port K
DCD GPIOPortL_Handler ; GPIO Port L
DCD SSI2_Handler ; SSI2 Rx and Tx
DCD SSI3_Handler ; SSI3 Rx and Tx
DCD UART3_Handler ; UART3 Rx and Tx
DCD UART4_Handler ; UART4 Rx and Tx
DCD UART5_Handler ; UART5 Rx and Tx
DCD UART6_Handler ; UART6 Rx and Tx
DCD UART7_Handler ; UART7 Rx and Tx

88. DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD I2C2_Handler ; I2C2 Master and Slave
DCD I2C3_Handler ; I2C3 Master and Slave
DCD Timer4A_Handler ; Timer 4 subtimer A
DCD Timer4B_Handler ; Timer 4 subtimer B
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved

89. DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD Timer5A_Handler ; Timer 5 subtimer A
DCD Timer5B_Handler ; Timer 5 subtimer B
DCD WideTimer0A_Handler ; Wide Timer 0
subtimer A
DCD WideTimer0B_Handler ; Wide Timer 0
subtimer B
DCD WideTimer1A_Handler ; Wide Timer 1
subtimer A
DCD WideTimer1B_Handler ; Wide Timer 1
subtimer B

90. DCD WideTimer2A_Handler ; Wide Timer 2
subtimer A
DCD WideTimer2B_Handler ; Wide Timer 2
subtimer B
DCD WideTimer3A_Handler ; Wide Timer 3
subtimer A
DCD WideTimer3B_Handler ; Wide Timer 3
subtimer B
DCD WideTimer4A_Handler ; Wide Timer 4
subtimer A
DCD WideTimer4B_Handler ; Wide Timer 4
subtimer B
DCD WideTimer5A_Handler ; Wide Timer 5
subtimer A
DCD WideTimer5B_Handler ; Wide Timer 5
subtimer B
DCD FPU_Handler ; FPU
DCD PECI0_Handler ; PECI 0
DCD LPC0_Handler ; LPC 0
DCD I2C4_Handler ; I2C4 Master and Slave
DCD I2C5_Handler ; I2C5 Master and Slave
DCD GPIOPortM_Handler ; GPIO Port M

91. DCD GPIOPortN_Handler ; GPIO Port N
DCD Quadrature2_Handler ; Quadrature Encoder 2
DCD Fan0_Handler ; Fan 0
DCD 0 ; Reserved
DCD GPIOPortP_Handler ; GPIO Port P
(Summary or P0)
DCD GPIOPortP1_Handler ; GPIO Port P1
DCD GPIOPortP2_Handler ; GPIO Port P2
DCD GPIOPortP3_Handler ; GPIO Port P3
DCD GPIOPortP4_Handler ; GPIO Port P4
DCD GPIOPortP5_Handler ; GPIO Port P5
DCD GPIOPortP6_Handler ; GPIO Port P6
DCD GPIOPortP7_Handler ; GPIO Port P7
DCD GPIOPortQ_Handler ; GPIO Port Q
(Summary or Q0)
DCD GPIOPortQ1_Handler ; GPIO Port Q1
DCD GPIOPortQ2_Handler ; GPIO Port Q2
DCD GPIOPortQ3_Handler ; GPIO Port Q3
DCD GPIOPortQ4_Handler ; GPIO Port Q4

92. DCD GPIOPortQ5_Handler ; GPIO Port Q5
DCD GPIOPortQ6_Handler ; GPIO Port Q6
DCD GPIOPortQ7_Handler ; GPIO Port Q7
DCD GPIOPortR_Handler ; GPIO Port R
DCD GPIOPortS_Handler ; GPIO Port S
DCD PWM1Generator0_Handler ; PWM 1 Generator
0
DCD PWM1Generator1_Handler ; PWM 1 Generator
1
DCD PWM1Generator2_Handler ; PWM 1 Generator
2
DCD PWM1Generator3_Handler ; PWM 1 Generator
3
DCD PWM1Fault_Handler ; PWM 1 Fault
;****************************************************
**************************
;
; This is the code that gets called when the processor first starts
execution
; following a reset event.

93. ;
;****************************************************
**************************
EXPORT Reset_Handler
Reset_Handler
;
; DO NOT Enable the floating-point unit. This must be
done here to handle the
; case where main() uses floating-point and the function
prologue saves
; floating-point registers (which will fault if floating-point
is not
; enabled). Any configuration of the floating-point unit
using
; DriverLib APIs must be done here prior to the floating-
point unit
; being enabled.
;
; Note that this does not use DriverLib since it might not
be included
; in this project.

94. ;
; MOVW R0, #0xED88
; MOVT R0, #0xE000
; LDR R1, [R0]
; ORR R1, #0x00F00000
; STR R1, [R0]
;
; Call the C library enty point that handles startup. This
will copy
; the .data section initializers from flash to SRAM and
zero fill the
; .bss section.
;
IMPORT Start
B Start ;call user assembly language program
;****************************************************
**************************
;

95. ; This is the code that gets called when the processor receives a
NMI. This
; simply enters an infinite loop, preserving the system state for
examination
; by a debugger.
;
;****************************************************
**************************
NMI_Handler PROC
EXPORT NMI_Handler [WEAK]
B .
ENDP
;****************************************************
**************************
;
; This is the code that gets called when the processor receives a
fault
; interrupt. This simply enters an infinite loop, preserving the
system state
; for examination by a debugger.

96. ;
;****************************************************
**************************
HardFault_Handler
PROC
EXPORT HardFault_Handler [WEAK]
B .
ENDP
MemManage_Handler
PROC
EXPORT MemManage_Handler [WEAK]
B .
ENDP
BusFault_Handler
PROC
EXPORT BusFault_Handler [WEAK]
B .

97. ENDP
UsageFault_Handler
PROC
EXPORT UsageFault_Handler [WEAK]
B .
ENDP
SVC_Handler PROC
EXPORT SVC_Handler [WEAK]
B .
ENDP
DebugMon_Handler
PROC
EXPORT DebugMon_Handler [WEAK]
B .
ENDP
PendSV_Handler PROC
EXPORT PendSV_Handler [WEAK]
B .

98. ENDP
SysTick_Handler PROC
EXPORT SysTick_Handler [WEAK]
B .
ENDP
IntDefaultHandler
PROC
EXPORT GPIOPortA_Handler [WEAK]
EXPORT GPIOPortB_Handler [WEAK]
EXPORT GPIOPortC_Handler [WEAK]
EXPORT GPIOPortD_Handler [WEAK]
EXPORT GPIOPortE_Handler [WEAK]
EXPORT UART0_Handler [WEAK]
EXPORT UART1_Handler [WEAK]
EXPORT SSI0_Handler [WEAK]
EXPORT I2C0_Handler [WEAK]
EXPORT PWM0Fault_Handler [WEAK]

99. EXPORT PWM0Generator0_Handler [WEAK]
EXPORT PWM0Generator1_Handler [WEAK]
EXPORT PWM0Generator2_Handler [WEAK]
EXPORT Quadrature0_Handler [WEAK]
EXPORT ADC0Seq0_Handler [WEAK]
EXPORT ADC0Seq1_Handler [WEAK]
EXPORT ADC0Seq2_Handler [WEAK]
EXPORT ADC0Seq3_Handler [WEAK]
EXPORT WDT_Handler [WEAK]
EXPORT Timer0A_Handler [WEAK]
EXPORT Timer0B_Handler [WEAK]
EXPORT Timer1A_Handler [WEAK]
EXPORT Timer1B_Handler [WEAK]
EXPORT Timer2A_Handler [WEAK]
EXPORT Timer2B_Handler [WEAK]
EXPORT Comp0_Handler [WEAK]
EXPORT Comp1_Handler [WEAK]
EXPORT Comp2_Handler [WEAK]

100. EXPORT SysCtl_Handler [WEAK]
EXPORT FlashCtl_Handler [WEAK]
EXPORT GPIOPortF_Handler [WEAK]
EXPORT GPIOPortG_Handler [WEAK]
EXPORT GPIOPortH_Handler [WEAK]
EXPORT UART2_Handler [WEAK]
EXPORT SSI1_Handler [WEAK]
EXPORT Timer3A_Handler [WEAK]
EXPORT Timer3B_Handler [WEAK]
EXPORT I2C1_Handler [WEAK]
EXPORT Quadrature1_Handler [WEAK]
EXPORT CAN0_Handler [WEAK]
EXPORT CAN1_Handler [WEAK]
EXPORT CAN2_Handler [WEAK]
EXPORT Ethernet_Handler [WEAK]
EXPORT Hibernate_Handler [WEAK]
EXPORT USB0_Handler [WEAK]
EXPORT PWM0Generator3_Handler [WEAK]

101. EXPORT uDMA_Handler [WEAK]
EXPORT uDMA_Error [WEAK]
EXPORT ADC1Seq0_Handler [WEAK]
EXPORT ADC1Seq1_Handler [WEAK]
EXPORT ADC1Seq2_Handler [WEAK]
EXPORT ADC1Seq3_Handler [WEAK]
EXPORT I2S0_Handler [WEAK]
EXPORT ExtBus_Handler [WEAK]
EXPORT GPIOPortJ_Handler [WEAK]
EXPORT GPIOPortK_Handler [WEAK]
EXPORT GPIOPortL_Handler [WEAK]
EXPORT SSI2_Handler [WEAK]
EXPORT SSI3_Handler [WEAK]
EXPORT UART3_Handler [WEAK]
EXPORT UART4_Handler [WEAK]
EXPORT UART5_Handler [WEAK]
EXPORT UART6_Handler [WEAK]
EXPORT UART7_Handler [WEAK]

102. EXPORT I2C2_Handler [WEAK]
EXPORT I2C3_Handler [WEAK]
EXPORT Timer4A_Handler [WEAK]
EXPORT Timer4B_Handler [WEAK]
EXPORT Timer5A_Handler [WEAK]
EXPORT Timer5B_Handler [WEAK]
EXPORT WideTimer0A_Handler [WEAK]
EXPORT WideTimer0B_Handler [WEAK]
EXPORT WideTimer1A_Handler [WEAK]
EXPORT WideTimer1B_Handler [WEAK]
EXPORT WideTimer2A_Handler [WEAK]
EXPORT WideTimer2B_Handler [WEAK]
EXPORT WideTimer3A_Handler [WEAK]
EXPORT WideTimer3B_Handler [WEAK]
EXPORT WideTimer4A_Handler [WEAK]
EXPORT WideTimer4B_Handler [WEAK]
EXPORT WideTimer5A_Handler [WEAK]
EXPORT WideTimer5B_Handler [WEAK]

103. EXPORT FPU_Handler [WEAK]
EXPORT PECI0_Handler [WEAK]
EXPORT LPC0_Handler [WEAK]
EXPORT I2C4_Handler [WEAK]
EXPORT I2C5_Handler [WEAK]
EXPORT GPIOPortM_Handler [WEAK]
EXPORT GPIOPortN_Handler [WEAK]
EXPORT Quadrature2_Handler [WEAK]
EXPORT Fan0_Handler [WEAK]
EXPORT GPIOPortP_Handler [WEAK]
EXPORT GPIOPortP1_Handler [WEAK]
EXPORT GPIOPortP2_Handler [WEAK]
EXPORT GPIOPortP3_Handler [WEAK]
EXPORT GPIOPortP4_Handler [WEAK]
EXPORT GPIOPortP5_Handler [WEAK]
EXPORT GPIOPortP6_Handler [WEAK]
EXPORT GPIOPortP7_Handler [WEAK]
EXPORT GPIOPortQ_Handler [WEAK]

104. EXPORT GPIOPortQ1_Handler [WEAK]
EXPORT GPIOPortQ2_Handler [WEAK]
EXPORT GPIOPortQ3_Handler [WEAK]
EXPORT GPIOPortQ4_Handler [WEAK]
EXPORT GPIOPortQ5_Handler [WEAK]
EXPORT GPIOPortQ6_Handler [WEAK]
EXPORT GPIOPortQ7_Handler [WEAK]
EXPORT GPIOPortR_Handler [WEAK]
EXPORT GPIOPortS_Handler [WEAK]
EXPORT PWM1Generator0_Handler [WEAK]
EXPORT PWM1Generator1_Handler [WEAK]
EXPORT PWM1Generator2_Handler [WEAK]
EXPORT PWM1Generator3_Handler [WEAK]
EXPORT PWM1Fault_Handler [WEAK]
GPIOPortA_Handler
GPIOPortB_Handler
GPIOPortC_Handler

105. GPIOPortD_Handler
GPIOPortE_Handler
UART0_Handler
UART1_Handler
SSI0_Handler
I2C0_Handler
PWM0Fault_Handler
PWM0Generator0_Handler
PWM0Generator1_Handler
PWM0Generator2_Handler
Quadrature0_Handler
ADC0Seq0_Handler
ADC0Seq1_Handler
ADC0Seq2_Handler
ADC0Seq3_Handler
WDT_Handler
Timer0A_Handler
Timer0B_Handler

106. Timer1A_Handler
Timer1B_Handler
Timer2A_Handler
Timer2B_Handler
Comp0_Handler
Comp1_Handler
Comp2_Handler
SysCtl_Handler
FlashCtl_Handler
GPIOPortF_Handler
GPIOPortG_Handler
GPIOPortH_Handler
UART2_Handler
SSI1_Handler
Timer3A_Handler
Timer3B_Handler
I2C1_Handler
Quadrature1_Handler

107. CAN0_Handler
CAN1_Handler
CAN2_Handler
Ethernet_Handler
Hibernate_Handler
USB0_Handler
PWM0Generator3_Handler
uDMA_Handler
uDMA_Error
ADC1Seq0_Handler
ADC1Seq1_Handler
ADC1Seq2_Handler
ADC1Seq3_Handler
I2S0_Handler
ExtBus_Handler
GPIOPortJ_Handler
GPIOPortK_Handler
GPIOPortL_Handler

108. SSI2_Handler
SSI3_Handler
UART3_Handler
UART4_Handler
UART5_Handler
UART6_Handler
UART7_Handler
I2C2_Handler
I2C3_Handler
Timer4A_Handler
Timer4B_Handler
Timer5A_Handler
Timer5B_Handler
WideTimer0A_Handler
WideTimer0B_Handler
WideTimer1A_Handler
WideTimer1B_Handler
WideTimer2A_Handler

109. WideTimer2B_Handler
WideTimer3A_Handler
WideTimer3B_Handler
WideTimer4A_Handler
WideTimer4B_Handler
WideTimer5A_Handler
WideTimer5B_Handler
FPU_Handler
PECI0_Handler
LPC0_Handler
I2C4_Handler
I2C5_Handler
GPIOPortM_Handler
GPIOPortN_Handler
Quadrature2_Handler
Fan0_Handler
GPIOPortP_Handler
GPIOPortP1_Handler

110. GPIOPortP2_Handler
GPIOPortP3_Handler
GPIOPortP4_Handler
GPIOPortP5_Handler
GPIOPortP6_Handler
GPIOPortP7_Handler
GPIOPortQ_Handler
GPIOPortQ1_Handler
GPIOPortQ2_Handler
GPIOPortQ3_Handler
GPIOPortQ4_Handler
GPIOPortQ5_Handler
GPIOPortQ6_Handler
GPIOPortQ7_Handler
GPIOPortR_Handler
GPIOPortS_Handler
PWM1Generator0_Handler
PWM1Generator1_Handler

111. PWM1Generator2_Handler
PWM1Generator3_Handler
PWM1Fault_Handler
B .
ENDP
;****************************************************
**************************
;
; Make sure the end of this section is aligned.
;
;****************************************************
**************************
ALIGN
;****************************************************
**************************
;

112. ; Some code in the normal code section for initializing the heap
and stack.
;
;****************************************************
**************************
AREA |.text|, CODE, READONLY
;****************************************************
**************************
;
; Useful functions.
;
;****************************************************
**************************
EXPORT DisableInterrupts
EXPORT EnableInterrupts
EXPORT StartCritical
EXPORT EndCritical
EXPORT WaitForInterrupt

113. ;*********** DisableInterrupts ***************
; disable interrupts
; inputs: none
; outputs: none
DisableInterrupts
CPSID I
BX LR
;*********** EnableInterrupts ***************
; disable interrupts
; inputs: none
; outputs: none
EnableInterrupts
CPSIE I
BX LR
;*********** StartCritical ************************
; make a copy of previous I bit, disable interrupts

114. ; inputs: none
; outputs: previous I bit
StartCritical
MRS R0, PRIMASK ; save old status
CPSID I ; mask all (except faults)
BX LR
;*********** EndCritical ************************
; using the copy of previous I bit, restore I bit to previous value
; inputs: previous I bit
; outputs: none
EndCritical
MSR PRIMASK, R0
BX LR
;*********** WaitForInterrupt ************************
; go to low power mode while waiting for the next interrupt
; inputs: none

115. ; outputs: none
WaitForInterrupt
WFI
BX LR
;****************************************************
**************************
;
; Make sure the end of this section is aligned.
;
;****************************************************
**************************
ALIGN
;****************************************************
**************************
;

116. ; Tell the assembler that we're done.
;
;****************************************************
**************************
END
Lab 02 EECE 237, Fall 2016 Semester
Objectives:
1. To gain experience with the ARM Assembly and the TI TIVA
C Launchpad
Development Board.
2. To gain experience of the Keil ARM development
environment and debugging
features.
3. To gain experience with the ARM I/O port con_guration and
interfacing GPIO
pins to buttons and LEDs.
Reference:
1. Textbook x4:1:1 and x4:2:1.
Introduction: In this experiment you will write assembly code to
control to implement
a rudimentary user interface of your launchpad. There are two
push buttons and three
LEDs that are mounted on your TM4C123 board as shown in
Figure 1.
Figure 1: Switch and LED interface on the Launchpad
In this lab, we will poll the switches and drive the LEDs in
interesting ways. The
challenge is con_guring the GPIO pins appropriately, reading
values from PF0 and

117. PF4 (your push buttons) and driving the appropriate output pins
in response (namely,
PF1, PF2, and PF3 for the red, blue, and green LEDs
respectively). Note from the
schematic in Figure 1 that the LEDs are positive logic and the
switches are negative
logic. Also, the switches will need pull-up resistors. This will
be provided by enabling
internal pull-ups in the TM4C123 through GPIO PORTF PUR R.
Experiment:
1. Download the project in eece237lab2.zip from the course
website as a starting
point. The _rst step is to initialize the TM4C123 GIPIO Port F
as appropriate
to the LEDs and push buttons that are mounted on the TIVA C
Development
board. As described in the course text in section 4.2.1 there are
several registers
that need to be set to speci_c values for PF0-PF4 to be
con_gured correctly. Do
this _rst.
2. Implement the following LED output behaviors based on the
button inputs.
_ If both buttons are simultaneously pressed we would like to
illuminate the
green LED, indicating the user has been granted access.
_ If only SW1 is pressed, light the Blue LED.
_ If only SW2 is pressed, light the Red LED.
_ If no buttons are pressed, no LEDs will be illuminated.
Your code should poll the switches and illuminate the LEDs as
described above.
You must use the Portf Input and Portf Output functions to
access
PortF. These two functions are provided in main2.s in
eece237lab2.zip.
What to turn in:

118. 1. Write a document describing how you design your code using
owcharts. The
writeup is due on Oct. 10 at the beginning of the class. Print
your writeup on
paper to turn in.
2. The code is due on Oct. 9 at 11:00 pm. Submit your code in
Blackboard Learn. Compress yourcode in a .zip" _le and then
upload it to Blackboard Learn. Please include all the code that
makes your launchpad runnable.