Part Number: MSP430FR5969
Tool/software: Code Composer Studio
Hello,
as I posted a week ago, I want to mesure an external wave signal and capturing the increase value of the timer. Once I achieved that, I want to to transmit the increase value of the timer by using UART ut (serial port). I used a code that captures a temperature signal and transmit the value, as an example to implement the code on my program but it does not work.
****HERE IS THE EXAMPLE CODE USED*****
#include <stdio.h>
#include <stdint.h>
#include <msp430.h>
long valor; // Global variable of 16 bits
void UART_print(char *string); // Function used to transmit by serial port
int main(void)
{
char result[50]; // String to transmit by serial port
WDTCTL = WDTPW | WDTHOLD; // Stop WDT
// Configure GPIOs to it's lowest power state
P1OUT = 0; // All P1.x reset
P1DIR = 0xFF; // All P1.x outputs
P2OUT = 0; // All P2.x reset
P2DIR = 0xFF; // All P2.x outputs
P3OUT = 0; // All P3.x reset
P3DIR = 0xFF; // All P3.x outputs
P4OUT = 0; // All P4.x reset
P4DIR = 0xFF; // All P4.x outputs
PJOUT = 0; // All PJ.x reset
PJDIR = 0xFFFF; // All PJ.x outputs
// Set up XT1
PJSEL0 = BIT4 | BIT5; // For XT1
P2SEL1 |= BIT1 | BIT0; // Configure UART pins
P2SEL0 &= ~(BIT1 | BIT0); // Configure UART pins
// Disable the GPIO power-on default high-impedance mode to activate
// previously configured port settings
PM5CTL0 &= ~LOCKLPM5;
// Clock System Setup
CSCTL0_H = CSKEY >> 8; // Unlock CS registers
CSCTL1 = DCOFSEL_0; // Set the freq. of DCO = 1 MHz
CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1; // Set all dividers
CSCTL4 &= ~LFXTOFF;
// New: Configure UART.
UCA0CTLW0 |= UCSSEL__SMCLK | UCSWRST; // No parity, LSB first, 8-bit data, 1 stop, Funciona amb el SMCLK!!
UCA0BRW = 6; // Baud rate register prescale. Configure 9600 baud. This value works for SMCLK =1MHz
UCA0MCTLW |= 0x2081; // UCBRS = 0x20, UCBRF = 8; UCOS16 = 1
UCA0CTLW0 &= ~UCSWRST; // Enable eUSCI_A
do
{
CSCTL5 &= ~LFXTOFFG; // Clear XT1 fault flag
SFRIFG1 &= ~OFIFG;
} while (SFRIFG1 & OFIFG); // Test oscillator fault flag
do
{
__delay_cycles(1000000); // Wait 1 s
valor=0x1010; //Variable to transmit. For example number 16.
sprintf(result,"Codi: %d \r\n",valor); // Generates a string
UART_print(result); // Send the result UART
while(UCA0STATW & UCBUSY); // Not clear if it is necessary
} while(1);
return 0;
}
void UART_print(char *string) // Send a zero-terminated string through the UART
{
char byte = *string++;
while(byte != 0)
{
while(!(UCA0IFG & UCTXIFG)); // Wait until TX buffer ready
UCA0TXBUF = byte; // Send the next byte of info
byte = *string++; // Get the next character to send
}
}
This program works, but when I try to implement it on my program, it has some errors and i do not know how to solve it.
****HERE IS MY CODE****
#include <stdio.h>
#include <stdint.h>
#include <msp430.h>
long value; // Global variable of 16 bits
unsigned int n = 0;
volatile unsigned int vinitial;
volatile unsigned int vfinal;
volatile unsigned int result;
void UART_print(char *string);
int main(void)
{
char results[50]; // Character string to transmit by serial port
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
// Configure GPIO
P1OUT &= ~0x01; // Clear P1.0 output
P1DIR |= 0x01;
P1SEL1 &= ~BIT3; // Set P1.3 to input direction
P1SEL0 |= BIT3;
P1DIR &= ~BIT3;
P2SEL1 |= BIT1 | BIT0; // Configure UART pins
P2SEL0 &= ~(BIT1 | BIT0); // Configure UART pins
// Disable the GPIO power-on default high-impedance mode to activate
// previously configured port settings
PM5CTL0 &= ~LOCKLPM5;
// Clock System Setup
CSCTL0_H = CSKEY >> 8; // Unlock CS registers
CSCTL1 = DCOFSEL_0; // Set DCO to 1MHz
CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK; // Set SMCLK = MCLK = DCO ACLK = VLOCLK
CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1; // Set all dividers to 1
CSCTL4 &= ~LFXTOFF;
CSCTL0_H = 0x00; // Lock CS module (use byte mode to upper byte)
__delay_cycles(1000); // Allow clock system to settle
UCA0CTLW0 |= UCSSEL__SMCLK | UCSWRST; // No parity, LSB first, 8-bit data, 1 stop, It works with SMCLK
UCA0BRW = 6; // Baud rate register prescale. Configure 9600 baud. This value is correct if SMCLK works at 1 MHz
UCA0MCTLW |= 0x2081; // UCBRS = 0x20, UCBRF = 8; UCOS16 = 1
UCA0CTLW0 &= ~UCSWRST; // Enable eUSCI_A
// Timer0_A3 Setup
TA1CCTL2 = CM_1 | CCIS_0 | SCS | CAP | CCIE;
// Capture rising edge,
// Use CCI2A=P1.3,
// Synchronous capture,
// Enable capture mode,
// Enable capture interrupt
TA1CTL = TASSEL__SMCLK | MC__CONTINUOUS ; // Use SMCLK as clock source, Start timer in continuous mode.
TA1EX0 = 0X00;
__bis_SR_register(LPM0_bits | GIE);
do
{
__delay_cycles(1000000); // Wait 1 s
value=result; // Output value
sprintf(results,"The result is: %d \r\n",value); // It generates a string with the result
UART_print(results); // Send the increase value of the timer through the backchannel UART
while(UCA0STATW & UCBUSY); // I do not know if it is necessary
} while(1);
return 0;
}
}
// Timer1_A3 CC1-4, TA Interrupt Handler
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = TIMER1_A1_VECTOR
__interrupt void Timer1_A1_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(TIMER1_A1_VECTOR))) Timer1_A1_ISR (void)
#else
#error Compiler not supported!
#endif
{
switch (__even_in_range(TA1IV, TA1IV_TAIFG)) {
case TA1IV_TA1CCR1:
break;
case TA1IV_TA1CCR2:
if (n == 0){
vinitial = TA1CCR2;
n = 1;
}
else {
vfinal = TA1CCR2;
n=0;
}
result = (vfinal-vinitial);
__bic_SR_register_on_exit(LPM0_bits); // Exit active CPU
break;
case TA1IV_TA1IFG:
break;
default:
break;
}
}
void UART_print(char *string) // Send a zero-terminated string through the UART
{
char byte = *string++;
while(byte != 0)
{
while(!(UCA0IFG & UCTXIFG)); // Wait until TX buffer ready
UCA0TXBUF = byte; // Send the next byte of info
byte = *string++; // Get the next character to send
}
}
It has some errors and I do not know how to solve it.
Thank you for your help and sorry for the inconvenience.
Adrian.