Part Number: MSP430FR6989
Tool/software: Code Composer Studio
Alright I am having another multiple interrupt problem similar to the previous question, but this time with UARTs.
So this is the code I have right now. I am definitely sure the code for the master works. It is the slave code which is messing up (and the slave has other interrupts there as well). I am including both the slave and the master code here. (the simplified versions).
I think it is one of the Mainloops which is creating the problem in the slave code. So I have an interrupt set up for ADC signals (which utilizes Mainloop) and interrupt set up for UART (which uses MainloopU). I think the MainloopU is never executed but how else to incorporate UART interrupt and ADC interrupt at the same time? Or is it another issue?
Also how do we set up the logistics for setting up UART? So does the master code and the slave code go in separate projects or in the same project?
Thanks in advance,
SLAVE CODE
;-------------------------------------------------------------------------------
.cdecls C,LIST,"msp430.h" ; Include device header file
;-------------------------------------------------------------------------------
;--- external references -------------------------------------------------------
.ref initGPIO
.ref initClocks
.ref myLCD_init
.ref myLCD_showChar
.ref myLCD_displayNumber
.def RESET ; Export program entry-point to
; make it known to linker.
;-------------------------------------------------------------------------------
.global _main
.global __STACK_END
.sect .stack ; Make stack linker segment ?known?
.data
LISTI: .word 0x0000,0x0001,0x0002,0x0001,0x0003,0x0000,0x0001,0x0004,0x0000,0x0001,0x0005,0x0000 ; first element initially 0000
VAR1: .space 2
VAR2: .space 2
VARX: .space 2
VARY: .space 2
VARZ: .space 2
VARS: .space 2
VARLA: .space 2
VARIND: .space 2
VARSCR: .space 2
VARSHK: .space 2
VAREXT: .space 2
.bss Result, 2
.text ; Assemble to Flash memory
.retain ; Ensure current section gets linked
.retainrefs
_main
RESET mov.w #__STACK_END,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
call #initGPIO
call #myLCD_init
bic.b #BIT3,&P3OUT
bic.b #BIT6,&P2OUT
bic.b #BIT6,&P3OUT
SetUpBoosterLed bis.b #BIT6,&P3DIR
bis.b #BIT6,&P2DIR
bic.b #BIT3,&P3OUT
bic.b #BIT6,&P2OUT
bic.b #BIT6,&P3OUT
SetupGPIO bic.b #BIT0,&P1OUT ; Clear LED to start
bis.b #BIT0,&P1DIR ; P1.0 output
bic.b #BIT7,&P9OUT ; Clear LED to start
bis.b #BIT7,&P9DIR ; P1.0 output
bis.b #BIT0+BIT1,&P2SEL0 ; USCI_A0 UART operation
bic.b #BIT0+BIT1,&P2SEL1
bic.b #BIT0,&P3DIR ; Set P3.0 as an input button with pull-up resistor
bis.b #BIT0,&P3REN
bis.b #BIT0,&P3OUT
bic.b #BIT1,&P3DIR ; Set P3.1 as an input button with pull-up resistor
bis.b #BIT1,&P3REN
bis.b #BIT1,&P3OUT
SetupP9 bis.b #BIT2,&P9SEL0 ;
bis.b #BIT2,&P9SEL1 ;
mov.w #0x0002, R10 ;
mov.w #0x0000, R8
bis.b #BIT7, &P2DIR ;100 600 200 (Bad Noise)
SetupP8 bis.b #BIT7,&P8SEL0
bis.b #BIT7,&P8SEL1
bis.b #BIT6,&P8SEL0
bis.b #BIT6,&P8SEL1
mov.w #0,&VARSCR
mov.w #0x0000,&VARIND
mov.w #0,R5
UnlockGPIO bic.w #LOCKLPM5,&PM5CTL0 ; Disable the GPIO power-on default
; high-impedance mode to activate
; previously configured port setting
ButnInterrupt
bis.b #BIT0,&P3IES ; Configure P3.0 as a high-to-low interrupt
bic.b #BIT0,&P3IFG
bis.b #BIT0,&P3IE
bis.b #BIT1,&P3IES ; Configure P3.1 as a high-to-low interrupt
bic.b #BIT1,&P3IFG
bis.b #BIT1,&P3IE
SetupADC12 mov.w #ADC12SHT0_2+ADC12ON+ADC12MSC,&ADC12CTL0 ; 16x
bis.w #ADC12SHP+ADC12CONSEQ_1,&ADC12CTL1 ; ADCCLK = MODOSC; sampling timer
bis.w #ADC12RES_2,&ADC12CTL2 ; 12-bit conversion results
bis.w #ADC12INCH_10,&ADC12MCTL0; A10 ADC input select; Vref=AVCC Joystick hor
bis.w #ADC12INCH_4,&ADC12MCTL1 ; A4 Joystick Vertical
bis.w #ADC12INCH_5+ADC12EOS,&ADC12MCTL2 ; A5 Accelerometer Z
bis.w #ADC12IE2,&ADC12IER0 ; Enable ADC conv complete interrupt
SetUpUART
mov.w #UCSWRST,&UCA0CTLW0 ; Put eUSCI in reset
bis.w #UCSSEL__SMCLK,&UCA0CTLW0 ; CLK = SMCLK
mov.b #8, &UCA0BR0 ; 1000000/115200 = 8.68
bis.w #0xD600,&UCA0MCTLW ; 1000000/115200 - INT(1000000/115200)=0.68
; UCBRSx value = 0xD6 (See UG)
clr.b &UCA0BR1
bic.b #UCSWRST,&UCA0CTL1 ; release from reset
bis.w #UCRXIE,&UCA0IE ; Enable USCI_A0 RX interrupt
Mainloop mov.w #35000,R15 ; Delay ~5000 cycles between conversions
L1 dec.w R15 ; Decrement R15
jnz L1 ; Delay over?
bis.w #ADC12ENC+ADC12SC,&ADC12CTL0 ; Start sampling/conversion
nop ;
bis.w #LPM0+GIE,SR ; Enter LPM0 w/ interrupt
nop ; for debug
jmp Mainloop ; Again
nop
MainloopU bit.w #UCTXIFG,&UCA0IFG
jeq MainloopU
mov.w &VARSCR,&TXData
mov.w &TXData,&UCA0TXBUF
nop ;
bis.w #LPM0+GIE,SR ; Enter LPM0 w/ interrupt
nop ; for debug
jmp Mainloop
nop
NeedHere
;-------------------------------------------------------------------------------
ADC12_ISR; ADC12 interrupt service routine
;-------------------------------------------------------------------------------
add.w &ADC12IV,PC ; add offset to PC
reti ; Vector 0: No interrupt
reti ; Vector 2: ADC12MEMx Overflow
reti ; Vector 4: Conversion time overflow
reti ; Vector 6: ADC12HI
reti ; Vector 8: ADC12LO
reti ; Vector 10: ADC12IN
jmp MEM0 ; Vector 12: ADC12MEM0 Interrupt
jmp MEM1 ; Vector 14: ADC12MEM1
jmp MEM2 ; Vector 16: ADC12MEM2
reti ; Vector 18: ADC12MEM3
reti ; Vector 20: ADC12MEM4
reti ; Vector 22: ADC12MEM5
reti ; Vector 24: ADC12MEM6
reti ; Vector 26: ADC12MEM7
reti ; Vector 28: ADC12MEM8
reti ; Vector 30: ADC12MEM9
reti ; Vector 32: ADC12MEM10
reti ; Vector 34: ADC12MEM11
reti ; Vector 36: ADC12MEM12
reti ; Vector 38: ADC12MEM13
reti ; Vector 40: ADC12MEM14
reti ; Vector 42: ADC12MEM15
reti ; Vector 44: ADC12MEM16
reti ; Vector 46: ADC12MEM17
reti ; Vector 48: ADC12MEM18
reti ; Vector 50: ADC12MEM19
reti ; Vector 52: ADC12MEM20
reti ; Vector 54: ADC12MEM21
reti ; Vector 56: ADC12MEM22
reti ; Vector 58: ADC12MEM23
reti ; Vector 60: ADC12MEM24
reti ; Vector 62: ADC12MEM25
reti ; Vector 64: ADC12MEM26
reti ; Vector 66: ADC12MEM27
reti ; Vector 68: ADC12MEM28
reti ; Vector 70: ADC12MEM29
reti ; Vector 72: ADC12MEM30
reti ; Vector 74: ADC12MEM31
reti ; Vector 76: ADC12RDY
MEM2
mov.w &ADC12MEM2,&VARZ
mov.w &ADC12MEM1, R9
mov.w &ADC12MEM0, R14
;DO STUFF
ExitLPM0 bic.w #LPM0,0(SP) ; Exit
reti
MEM0 ; Clear LED as default
bic.w #LPM0,0(SP)
reti
MEM1 ; Clear LED as default
bic.w #LPM0,0(SP)
reti
;-------------------------------------------------------------------------------
PORT3_0_ISR; P3.0 Interrupt Service Routine
;-------------------------------------------------------------------------------
bit.b #BIT1, &P3IFG
jnz Pin3_1Stuff
sub.w #4, SP ; DEBOUNCING ACCOUNTED
mov.w #5000, 0(SP)
clr.w 2(SP)
testloop bit.b #BIT0, &P3IN
jnz not_down
inc.w 2(SP)
not_down dec.w 0(SP)
jnz testloop
;---------------LOOP COMPLETED ---------------
cmp.w #800, 2(SP)
jl exit
bic.b #BIT0, &P3IFG
;DO STUFF
;--------------EXIT ISR ----------------------
exit: clr.b &P3IFG
add.w #4, SP
jmp SKipthere
Pin3_1Stuff
sub.w #4, SP ; Accounting for Debouncing of switches
mov.w #5000, 0(SP)
clr.w 2(SP)
testloop2 bit.b #BIT1, &P3IN
jnz not_down2
inc.w 2(SP)
not_down2 dec.w 0(SP)
jnz testloop2
;---------------LOOP COMPLETED ---------------
cmp.w #800, 2(SP)
jl exit2
bic.b #BIT1, &P3IFG
; DO STUFF
exit2: clr.b &P3IFG
add.w #4, SP
SKipthere
reti
;------------------------------------------------------------------------------
USCI_A0_ISR; USCI A0 Receive/Transmit Interrupt Service Routine
;------------------------------------------------------------------------------
add.w &UCA0IV,PC ; add offset to PC
reti ; Vector 0: No interrupts
jmp Receive ; Vector 2: USCI UCRXIFG
reti ; Vector 4: USCI UCTXIFG
reti ; Vector 6: USCI UCSTTIFG
reti ; Vector 8: USCI UCTXCPTIFG
Receive mov.w &UCA0RXBUF,&RXData ; Read buffer
; As Slave, do nothing with received data from Master
bic.w #LPM0,0(SP) ; Exit LPM0 on reti
reti
TrapCPU jmp TrapCPU ; Trap CPU
reti
;------------------------------------------------------------------------------
; Interrupt Vectors
;------------------------------------------------------------------------------
.sect ".reset" ; MSP430 RESET Vector
.short RESET ;
.sect ADC12_VECTOR ; ADC12 Vector
.short ADC12_ISR ;
.sect ".int31" ;Button Interrupt
.short PORT3_0_ISR
.sect USCI_A0_VECTOR
.short USCI_A0_ISR
.end
;-------------------------------------------------------THE END OF SLAVE--------------------------------------------------------------------------------------------------------------------------------------------
;MASTER CODE UART
;MASTER (a MSP430FR6989) CONNECTED TO TWO Slaves (SLAVE_1 and SLAVE_2)
;Connections
;Slave_1 P2.0---->Master P2.1
;Slave_1 P2.1 <-----Master P2.0
;GND<---->GND
;GND<---->GND
;-------------------------------------------------------------------------------
.cdecls C,LIST,"msp430.h" ; Include device header file
;-------------------------------------------------------------------------------
.ref initGPIO
.ref initClocks
.ref myLCD_init
.ref myLCD_showChar
.ref myLCD_displayNumber
.def RESET ; Export program entry-point to
; make it known to linker.
;-------------------------------------------------------------------------------
RXData1 .set R5
RXData2 .set R7
TXData .set R6
;-------------------------------------------------------------------------------
.global _main
.global __STACK_END
.sect .stack ; Make stack linker segment ?known?
.data
.bss Result, 2
.text ; Assemble to Flash memory
.retain ; Ensure current section gets linked
.retainrefs
_main
RESET mov.w #__STACK_END,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop watchdog timer
call #initGPIO
call #myLCD_init
mov.w #'A', R12
mov.w #1, R13
call #myLCD_showChar
mov.w #2, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w #3, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w #4, R13
mov.w #'B', R12
call #myLCD_showChar
mov.w #5, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w #6, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w &Result, R15
SetupGPIO
SetUpP2
bis.b #BIT0+BIT1,&P2SEL0 ; USCI_A0 UART operation
bic.b #BIT0+BIT1,&P2SEL1
SetUpP3
;bis.b #BIT5+BIT4,&P3SEL0 ; USCI_A1 UART operation
;bic.b #BIT5+BIT4,&P3SEL1
UnlockGPIO bic.w #LOCKLPM5,&PM5CTL0 ; Disable the GPIO power-on default
; high-impedance mode to activate
; previously configured port settings
SetupUART
mov.w #UCSWRST,&UCA0CTLW0 ; Put eUSCI in reset
; mov.w #UCSWRST,&UCA1CTLW0
bis.w #UCSSEL__SMCLK,&UCA0CTLW0 ; CLK = SMCLK
;bis.w #UCSSEL__SMCLK,&UCA1CTLW0 ; CLK = SMCLK
mov.b #8, &UCA0BR0 ; 1000000/115200 = 8.68
; mov.b #8,&UCA1BR0
bis.w #0xD600,&UCA0MCTLW ; 1000000/115200 - INT(1000000/115200)=0.68
; UCBRSx value = 0xD6 (See UG)
;bis.w #0xD600,&UCA1MCTLW
clr.b &UCA0BR1
;clr.b &UCA1BR1
bic.b #UCSWRST,&UCA0CTL1 ; release from reset
;bic.b #UCSWRST,&UCA1CTL1
bis.w #UCRXIE,&UCA0IE ; Enable USCI_A0 RX interrupt
; bis.w #UCRXIE,&UCA1IE ; Enable USCI_A1 RX interrupt
mov.w #0,RXData1 ; RXData1 = 0
; mov.w #0,RXData2 ; RXData1 = 0
mov.w #1,TXData ; TXData = 1
Mainloop bit.w #UCTXIFG,&UCA0IFG
jeq Mainloop
mov.w TXData,&UCA0TXBUF ; Load data onto buffer
nop ;
bis.w #LPM0+GIE,SR ; Enter LPM0, interrupts enabled
nop ; For debugger
jmp Mainloop
;Mainloop2 bit.w #UCTXIFG,&UCA1IFG
; jeq Mainloop2
; mov.w TXData,&UCA1TXBUF ; Load data onto buffer
; nop ;
; bis.w #LPM0+GIE,SR ; Enter LPM0, interrupts enabled
; nop ; For debugger
; jmp Mainloop2
;------------------------------------------------------------------------------
USCI_A0_ISR; USCI A0 Receive/Transmit Interrupt Service Routine
;------------------------------------------------------------------------------
add.w &UCA0IV,PC ; add offset to PC
reti ; Vector 0: No interrupts
jmp Receive ; Vector 2: USCI UCRXIFG
reti ; Vector 4: USCI UCTXIFG
reti ; Vector 6: USCI UCSTTIFG
reti ; Vector 8: USCI UCTXCPTIFG
Receive mov.w &UCA0RXBUF,RXData1 ; Read buffer
mov.w #'A', R12
mov.w #1, R13
call #myLCD_showChar
mov.w #2, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w #3, R13
mov.w #'1', R12
call #myLCD_showChar
mov.w #4, R13
mov.w #'B', R12
call #myLCD_showChar
mov.w #5, R13
mov.w #'0', R12
call #myLCD_showChar
mov.w #6, R13
mov.w #'1', R12
call #myLCD_showChar
mov.w &Result, R15
;Do something with RXData1
bic.w #LPM0,0(SP) ; Exit LPM0 on reti
reti
TrapCPU jmp TrapCPU ; Trap CPU
reti
;------------------------------------------------------------------------------
;USCI_A1_ISR; USCI A1 Receive/Transmit Interrupt Service Routine
;------------------------------------------------------------------------------
; add.w &UCA1IV,PC ; add offset to PC
; reti ; Vector 0: No interrupts
; jmp Receive2 ; Vector 2: USCI UCRXIFG
; reti ; Vector 4: USCI UCTXIFG
; reti ; Vector 6: USCI UCSTTIFG
; reti ; Vector 8: USCI UCTXCPTIFG
;Receive2 mov.w &UCA1RXBUF,RXData2 ; Read buffer
; Do something with the RXData2
; bic.w #LPM0,0(SP) ; Exit LPM0 on reti
; reti
;TrapCPU2 jmp TrapCPU2 ; Trap CPU
; reti
;------------------------------------------------------------------------------
; Interrupt Vectors
;------------------------------------------------------------------------------
.sect ".reset" ; MSP430 RESET Vector
.short RESET ;
.sect USCI_A0_VECTOR ; USCI A0 Receive/Transmit Vector
.short USCI_A0_ISR
; .sect USCI_A1_VECTOR ; USCI A1 Receive/Transmit Vector
; .short USCI_A1_ISR
.end
