MSP430F5529实现计算器

MSP430F5529是一款微控制器，你可以通过编程实现计算器的功能。下面是一个简单的计算器实现的示例代码：

#include <msp430.h>

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer
    PM5CTL0 &= ~LOCKLPM5;       // disable the GPIO power-on default high-impedance mode
    
    P1DIR |= BIT0;              // set P1.0 as output
    P1OUT &= ~BIT0;             // set P1.0 to low initially
    
    char num1[10], num2[10], op;
    int result;
    
    while(1)
    {
        // read in the first number
        int i = 0;
        do
        {
            while((UCA0IFG & UCTXIFG) == 0);     // wait for TX buffer to be empty
            UCA0TXBUF = getchar();              // send prompt to serial console
            num1[i] = getchar();                // read in character from serial console
            i++;
        } while(num1[i-1] != '\n');             // continue reading until newline character is received
        num1[i-1] = '\0';                       // replace newline character with null terminator
        
        // read in the operator
        while((UCA0IFG & UCTXIFG) == 0);         // wait for TX buffer to be empty
        UCA0TXBUF = getchar();                  // send prompt to serial console
        op = getchar();                         // read in operator character from serial console
        
        // read in the second number
        int j = 0;
        do
        {
            while((UCA0IFG & UCTXIFG) == 0);     // wait for TX buffer to be empty
            UCA0TXBUF = getchar();              // send prompt to serial console
            num2[j] = getchar();                // read in character from serial console
            j++;
        } while(num2[j-1] != '\n');             // continue reading until newline character is received
        num2[j-1] = '\0';                       // replace newline character with null terminator
        
        // perform calculation based on operator
        switch(op)
        {
            case '+':
                result = atoi(num1) + atoi(num2);
                break;
            case '-':
                result = atoi(num1) - atoi(num2);
                break;
            case '*':
                result = atoi(num1) * atoi(num2);
                break;
            case '/':
                result = atoi(num1) / atoi(num2);
                break;
            default:
                result = 0;
                break;
        }
        
        // output result to serial console and LED
        printf("Result: %d\n", result);
        if(result > 0)
            P1OUT |= BIT0;                      // turn on LED if result is positive
        else
            P1OUT &= ~BIT0;                     // turn off LED if result is negative or zero
    }
}

这段代码通过串口与计算机进行交互，读取两个数字和一个运算符，并根据运算符进行计算。运算结果通过串口返回到计算机，并且通过一个LED灯显示在开发板上。你可以根据自己的需求对代码进行修改和优化。