;-------------------------------------------------------------------------------

; MSP430 Assembler Code Template for use with TI Code Composer Studio

;

;

;-------------------------------------------------------------------------------

.cdecls C,LIST,"msp430.h" ; Include device header file

;-------------------------------------------------------------------------------

.def RESET ; Export program entry-point to

; make it known to linker.

;-------------------------------------------------------------------------------

LookupNibble .macro Position

mov.w R4, R13

and.b #0x0f, R13

mov.b DisplayAsciiHexTable(R13), Position (R15)

.endm

;-------------------------------------------------------------------------------

.text ; Assemble into program memory.

.retain ; Override ELF conditional linking

; and retain current section.

.retainrefs ; And retain any sections that have

; references to current section.

;-------------------------------------------------------------------------------

RESET mov.w #__STACK_END,SP ; Initialize stackpointer

StopWDT mov.w #WDTPW|WDTHOLD,&WDTCTL ; Stop watchdog timer

.text ; program start

.global _main ; define entry point

_main:

NOP

mov.w #WDTPW+WDTHOLD,&WDTCTL ; stop watchdog timer

;Set the I/O port that controls the RED LED to an output.

; To do this set bit 0 in the P1DIR register. Leave all

; all other I/O lines as inputs

call #IOportsSetup

call #SetupADC

call #SetupTimer

Mainloop:

bis.w #0000000000000001b, ADC12CTL0

call #HalfSecondDelay

bic.w #0000000000000001b, ADC12CTL0

mov.w ADC12MEM0, R5 ;move values into register

mov.w ADC12MEM1, R6

mov.w ADC12MEM2, R9

bit.w #0x8000, R5 ;check if number is negative

jz AfterCheck1

xor.w #0xffff, R5 ;use two's complement to get positive value

add.w #1, R5 ;use two's complement to get positive value

AfterCheck1:

bit.w #0x8000, R6 ;check if number is negative

jz AfterCheck2

xor.w #0xffff, R6 ;use two's complement to get positive value

add.w #1, R6 ;use two's complement to get positive value

AfterCheck2:

bit.w #0x8000, R9 ;check if number is negative

jz AfterCheck3

xor.w #0xffff, R9 ;use two's complement to get positive value;-------------------------------------------------------------------------------

; MSP430 Assembler Code Template for use with TI Code Composer Studio

;

;

;-------------------------------------------------------------------------------

.cdecls C,LIST,"msp430.h" ; Include device header file

;-------------------------------------------------------------------------------

.def RESET ; Export program entry-point to

; make it known to linker.

;-------------------------------------------------------------------------------

LookupNibble .macro Position

mov.w R4, R13

and.b #0x0f, R13

mov.b DisplayAsciiHexTable(R13), Position (R15)

.endm

;-------------------------------------------------------------------------------

.text ; Assemble into program memory.

.retain ; Override ELF conditional linking

; and retain current section.

.retainrefs ; And retain any sections that have

; references to current section.

;-------------------------------------------------------------------------------

RESET mov.w #__STACK_END,SP ; Initialize stackpointer

StopWDT mov.w #WDTPW|WDTHOLD,&WDTCTL ; Stop watchdog timer

.text ; program start

.global _main ; define entry point

_main:

NOP

mov.w #WDTPW+WDTHOLD,&WDTCTL ; stop watchdog timer

;Set the I/O port that controls the RED LED to an output.

; To do this set bit 0 in the P1DIR register. Leave all

; all other I/O lines as inputs

call #IOportsSetup

call #SetupADC

call #SetupTimer

Mainloop:

bis.w #0000000000000001b, ADC12CTL0

call #HalfSecondDelay

bic.w #0000000000000001b, ADC12CTL0

mov.w ADC12MEM0, R5 ;move values into register

mov.w ADC12MEM1, R6

mov.w ADC12MEM2, R9

bit.w #0x8000, R5 ;check if number is negative

jz AfterCheck1

xor.w #0xffff, R5 ;use two's complement to get positive value

add.w #1, R5 ;use two's complement to get positive value

AfterCheck1:

bit.w #0x8000, R6 ;check if number is negative

jz AfterCheck2

xor.w #0xffff, R6 ;use two's complement to get positive value

add.w #1, R6 ;use two's complement to get positive value

AfterCheck2:

bit.w #0x8000, R9 ;check if number is negative

jz AfterCheck3

xor.w #0xffff, R9 ;use two's complement to get positive value

add.w #1, R9 ;use two's complement to get positive value

AfterCheck3:

mov.w R5,&TA0CCR1

mov.w R6,&TA0CCR2

mov.w R9,&TA0CCR3

jmp Mainloop

NOP

SetupADC:

bic.w #0000000000000010b, ADC12CTL0

mov.w #0000111110010000b, ADC12CTL0

mov.w #0000001011100110b, ADC12CTL1

mov.w #0000000100101000b, ADC12CTL2

mov.b #00000000b, ADC12MCTL0

mov.b #00000001b, ADC12MCTL1

mov.b #00000010b, ADC12MCTL2

mov.b #10001010b, ADC12MCTL3

bis.w #0000000000000010b, ADC12CTL0

ret

IOportsSetup:

mov.b #00111100b,P1OUT

mov.b #00000000b,P1REN

mov.b #00111100b,P1DIR

mov.b #00011100b,P1SEL

ret

SetupTimer:

mov.w #0000001000010100b, &TA0CTL

mov.w #0000100011100000b, &TA0CCTL1

mov.w #0000100011100000b, &TA0CCTL2

mov.w #0000100011100000b, &TA0CCTL3

mov.w #0x0fff,&TA0CCR0

mov.w #0x000f,&TA0CCR1

mov.w #0x000f,&TA0CCR2

mov.w #0x000f,&TA0CCR3

ret

HalfSecondDelay:

mov #0x1,R12

OuterTimercountLoop:

mov #0xffff,R15

TimercountLoop:

nop

sub #1,R15

jnz TimercountLoop

sub #1,R12

jnz OuterTimercountLoop

ret

;-------------------------------------------------------------------------------

; Stack Pointer definition

;-------------------------------------------------------------------------------

.global __STACK_END

.sect .stack

;-------------------------------------------------------------------------------

; Interrupt Vectors

;-------------------------------------------------------------------------------

.sect ".reset" ; MSP430 RESET Vector

.short RESET

add.w #1, R9 ; 2;s comp values

AfterCheck3:

mov.w R5,&TA0CCR1

mov.w R6,&TA0CCR2

mov.w R9,&TA0CCR3

jmp Mainloop

NOP

SetupADC:

bic.w #0000000000000010b, ADC12CTL0 ; ADC12_A Control Register 0 CONFIGURATIONS

mov.w #0000111110010000b, ADC12CTL0 ; ADC12_A Control Register 0 CONFIGURATIONS

mov.w #0000001011100110b, ADC12CTL1 ; ADC12_A Control Register 1 CONFIGURATIONS

mov.w #0000000100101000b, ADC12CTL2 ; ADC12_A Control Register 2 CONFIGURATIONS

mov.b #00000000b, ADC12MCTL0 ; Conversion Memory Control Register 0

mov.b #00000001b, ADC12MCTL1 ; Conversion Memory Control Register 1

mov.b #00000010b, ADC12MCTL2 ; Conversion Memory Control Register 2

mov.b #10001010b, ADC12MCTL3 ; Conversion Memory Control Register 3

bis.w #0000000000000010b, ADC12CTL0 ;ADC12_A Control Register 2 CONFIGURATIONS

ret

IOportsSetup:

mov.b #00111100b,P1OUT ;setup p1

mov.b #00000000b,P1REN ;setup pull up pull down

nop

nop

mov.b #00111100b,P1DIR ;set up data dir

mov.b #00011100b,P1SEL ;set up chip select

ret

SetupTimer:

mov.w #0000001000010100b, &TA0CTL ;TA ctrl0 configurations

mov.w #0000100011100000b, &TA0CCTL1 ;;TA ctrl 1 configurations

nop

mov.w #0000100011100000b, &TA0CCTL2 ;TA ctr2 configurations

nop

mov.w #0000100011100000b, &TA0CCTL3 ;TA ctrl3 configurations

nop

mov.w #0x0fff,&TA0CCR0 ; Timer_A0 CCR0 capture input

mov.w #0x000f,&TA0CCR1 ; Timer_A0 CCR1 capture input

mov.w #0x000f,&TA0CCR2 ;Timer_A0 CCR2 capture input

mov.w #0x000f,&TA0CCR3 ;Timer_A0 CCR3 capture input

ret

HalfSecondDelay:

mov #0x1,R12 ; HALF SECONED ROTUNE

OuterTimercountLoop:

mov #0xffff,R15

TimercountLoop:

nop

sub #1,R15

jnz TimercountLoop

sub #1,R12

jnz OuterTimercountLoop

ret

;-------------------------------------------------------------------------------

; Stack Pointer definition

;-------------------------------------------------------------------------------

.global __STACK_END

.sect .stack

;-------------------------------------------------------------------------------

; Interrupt Vectors

;-------------------------------------------------------------------------------

.sect ".reset" ; MSP430 RESET Vector

.short RESET