Set up files for lab 3
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**/*.elf
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**/*.log
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**/*.synctex.gz
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**/*.aux
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**/.vscode
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SOURCES = $(wildcard *.c)
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EXEC = $(patsubst %.c, %.elf, $(SOURCES))
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DEVICE = msp430g2553
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INSTALL_DIR=$(HOME)/ti/msp430_gcc
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GCC_DIR = $(INSTALL_DIR)/bin
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SUPPORT_FILE_DIRECTORY = $(INSTALL_DIR)/include
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CC = $(GCC_DIR)/msp430-elf-gcc
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GDB = $(GCC_DIR)/msp430-elf-gdb
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#O0 works, O1 works, O2 doesn't -Os works
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CFLAGS = -I $(SUPPORT_FILE_DIRECTORY) -mmcu=$(DEVICE) -Os -g
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LFLAGS = -L $(SUPPORT_FILE_DIRECTORY) -T $(DEVICE).ld
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all: prog1 prog2 adc pwm
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prog1: prog1.c
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$(CC) $(CFLAGS) $(LFLAGS) $? -o prog1.elf
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prog2: prog2.c
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$(CC) $(CFLAGS) $(LFLAGS) $? -o prog2.elf
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adc: adc.c
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$(CC) $(CFLAGS) $(LFLAGS) $? -o adc.elf
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pwm: pwm.c
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$(CC) $(CFLAGS) $(LFLAGS) $? -o pwm.elf
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debug: all
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$(GDB) ${EXEC}
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clean:
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rm *.elf
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//******************************************************************************
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// MSP430G2x31 Demo - ADC10, Sample A1, AVcc Ref, Set P1.0 if > 0.75*AVcc
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//
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// Description: A single sample is made on A1 with reference to AVcc.
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// Software sets ADC10SC to start sample and conversion - ADC10SC
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// automatically cleared at EOC. ADC10 internal oscillator times sample (16x)
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// and conversion.
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//
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// MSP430G2x31
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// -----------------
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// /|\| XIN|-
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// | | |
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// --|RST XOUT|
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// | |
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// | |
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// | |
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// | |
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// | |
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// input >---|P1.1/A1 P1.0|--> red Led onboard BIT0
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// | |
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// | P1.2|--> yellow Led
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// | P1.6|--> green Led onboard BIT6
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//
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//
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// D. Dang
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// Texas Instruments Inc.
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//******************************************************************************
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#include "msp430.h"
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void main(void) {
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WDTCTL = WDTPW + WDTHOLD; // Stop WDT
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ADC10CTL0 = ADC10SHT_2 + ADC10ON; // ADC10ON
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ADC10CTL1 = INCH_1; // input A1
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ADC10AE0 |= 0x02; // PA.1 ADC option select
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P1DIR |= 0x01; // Set P1.0 to output direction
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while (1) {
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ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
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while (ADC10CTL1 &ADC10BUSY); // ADC10BUSY?
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if (ADC10MEM < 0x2FF) {
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P1OUT &= ~0x01; // Clear P1.0 LED off
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} else {
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P1OUT |= 0x01; // Set P1.0 LED on
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}
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unsigned i;
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for (i = 0xFFFF; i > 0; i--); // Delay
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}
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}
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//******************************************************************************
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OBJECTS=main.o
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DEVICE = msp430g2553
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INSTALL_DIR=$(HOME)/ti/msp430_gcc
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GCC_DIR = $(INSTALL_DIR)/bin
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SUPPORT_FILE_DIRECTORY = $(INSTALL_DIR)/include
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CC = $(GCC_DIR)/msp430-elf-gcc
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GDB = $(GCC_DIR)/msp430-elf-gdb
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#O0 works, O1 works, O2 doesn't -Os works
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CFLAGS = -I $(SUPPORT_FILE_DIRECTORY) -mmcu=$(DEVICE) -Os -g
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LFLAGS = -L $(SUPPORT_FILE_DIRECTORY) -T $(DEVICE).ld
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all: ${OBJECTS}
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$(CC) $(CFLAGS) $(LFLAGS) $? -o main.elf
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debug: all
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$(GDB) main.elf
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#include <msp430.h>
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volatile unsigned int i = 0; // Initialize variables. This will keep count of how many cycles between LED toggles
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int main(void)
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{
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WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer. This line of code is needed at the beginning of most MSP430 projects.
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// The watchdog timer can reset the device after a certain period of time.
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P1DIR |= 0x41; // P1DIR is a register that configures the direction (DIR) of a port pin as an output or an input.
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// To set a specific pin as output or input, we write a '1' or '0' on the appropriate bit of the register.
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// P1DIR = <PIN7><PIN6><PIN5><PIN4><PIN3><PIN2><PIN1><PIN0>
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// Since we want to blink the on-board LEDs, we want to set the direction of Port 1, Pins 0 and 6 (P1.0, P1.6) as outputs
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// We do that by writing a 1 on the PIN0 and PIN6 bits of the P1DIR register
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// P1DIR = 0100 0001
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// P1DIR = 0x41 <-- this is the hexadecimal conversion of 0010 0001
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for (;;) // This for-loop will cause the lines of code within to loop infinitely
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{
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// P1OUT is the register which holds the status of the LEDs.
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// '1' specifies that it's ON or HIGH, while '0' specifies that it's OFF or LOW
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// Since our LEDs are tied to P1.0 and P1.6, we will toggle the appropriate bits in P1OUT
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for(i=0; i< 20000; i++){ // Delay between LED toggles. This for-loop will run until the condition is met.
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if (i == 0)
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P1OUT ^= 0x01; // toggle the red LED (P1.0)
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if (i == 6000)
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P1OUT ^= 0x40; // toggle the green LED (P1.6)
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// You need to be a little careful with using for loops for time delays. Optimizing compilers will
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// notice if nothing happens inside a loop, and simply omit the loop to speed up the code.
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// here, we have some comparisons being done inside the loop, so the code runs as desired even if
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// the compiler optimizes.
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}
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}
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}
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Binary file not shown.
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/*
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* PHYS319 Lab3 Timing example in C
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*
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* Written by Ryan Wicks
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* 16 January 2012
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*
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* This program is a C version of the assembly program that formed part of lab 2.
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* This is not the best way to implement timing, or to organize your code.
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* It is simply one way.
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*
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* This will almost certainly not give exactly the same timing as the assembly
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* program from lab 2, and the output assembly will also be very different, even
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* though the task is similar.
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*/
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#include <msp430.h>
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void main(void) {
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volatile unsigned int count; // You must declare your variables in C
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// notice the label volatile. What happens if you remove this label?
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WDTCTL = WDTPW + WDTHOLD; // Stop WDT
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P1DIR = 0x41; // Set P1 output direction
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P1OUT = 0x01; // Set the output
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while (1) { // Loop forever
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count = 60000;
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while(count != 0) {
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count--; // decrement
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}
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P1OUT = P1OUT ^ 0x41; // bitwise xor the output with 0x41
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}
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}
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/*
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* PHYS319 Lab 3 Interrupt Example in C
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*
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* Written by Ryan Wicks
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* 16 Jan 2012
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*
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* This program is a C version of the assembly program that formed part of
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* lab 2.
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*
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*
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*/
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#include <msp430.h>
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void main(void) {
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WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
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P1DIR = 0xF7; // C does not have a convenient way of
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// representing numbers in binary; use hex instead
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P1OUT = 0x49;
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P1REN = 0x08; // enable resistor
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P1IE = 0x08; // Enable input at P1.3 as an interrupt
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_BIS_SR (LPM4_bits + GIE); // Turn on interrupts and go into the lowest
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// power mode (the program stops here)
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// Notice the strange format of the function, it is an "intrinsic"
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// ie. not part of C; it is specific to this chipset
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}
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// Port 1 interrupt service routine
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void __attribute__ ((interrupt(PORT1_VECTOR))) PORT1_ISR(void) {
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P1OUT ^= 0x41; // toggle the LEDS
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P1IFG &= ~0x08; // Clear P1.3 IFG. If you don't, it just happens again.
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}
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#include "msp430.h"
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void main(void) {
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WDTCTL = WDTPW + WDTHOLD; // Stop WDT
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P1DIR |= BIT2; // P1.2 to output
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P1SEL |= BIT2; // P1.2 to TA0.1
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CCR0 = 1000-1; // PWM Period
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CCTL1 = OUTMOD_7; // CCR1 reset/set
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CCR1 = 250; // CCR1 PWM duty cycle
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TACTL = TASSEL_2 + MC_1; // SMCLK, up mode
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_BIS_SR(LPM0_bits); // Enter Low Power Mode 0
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}
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\relax
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\@writefile{toc}{\contentsline {section}{\numberline {1}Lab 1}{1}}
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\@writefile{toc}{\contentsline {section}{\numberline {2}Lab 2}{3}}
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\@writefile{toc}{\contentsline {subsection}{\numberline {2.1}Student Number}{3}}
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\@writefile{toc}{\contentsline {subsection}{\numberline {2.2}Program 1}{4}}
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\@writefile{toc}{\contentsline {subsection}{\numberline {2.3}Program 2}{4}}
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