写一个msp432和openmv串口通信的代码

以下是一个示例代码，用于 MSP432 和 OpenMV 之间的串口通信：

MSP432 代码：

#include "msp.h"
#include <stdint.h>

void UART0_Init(void) {
    P1->SEL0 |= 0x0C;                   // set P1.2 and P1.3 as UART pins
    P1->SEL1 &= ~0x0C;
    EUSCI_A0->CTLW0 |= 1;               // put eUSCI in reset mode
    EUSCI_A0->CTLW0 = 0x0081;           // select SMCLK as clock source, 8N1 frame, no parity
    EUSCI_A0->BRW = 26;                 // 3MHz/115200 = 26
    EUSCI_A0->MCTLW &= ~0xFFF1;         // clear first and second modulation stage bit fields
    EUSCI_A0->CTLW0 &= ~1;              // enable eUSCI
}

void UART0_Write(uint8_t data) {
    while(!(EUSCI_A0->IFG & 2));        // wait for TX buffer to be empty
    EUSCI_A0->TXBUF = data;
}

uint8_t UART0_Read(void) {
    while(!(EUSCI_A0->IFG & 1));        // wait for RX buffer to be full
    return EUSCI_A0->RXBUF;
}

int main(void) {
    uint8_t data = 0;

    WDT_A->CTL = WDT_A_CTL_PW | WDT_A_CTL_HOLD;     // stop watchdog timer

    UART0_Init();

    while(1) {
        UART0_Write('H');
        UART0_Write('i');
        UART0_Write('\n');
        data = UART0_Read();
    }
}

OpenMV 代码：

import time
from pyb import UART

uart = UART(3, 115200) # UART3, baudrate = 115200

while(True):
    if uart.any():
        data = uart.read(1)
        print(data)
        uart.write("Hello World!\n")
    time.sleep(100)

这个代码通过 UART 实现 MSP432 和 OpenMV 之间的通信。MSP432 使用 EUSCI_A0 模块作为串口通信模块，OpenMV 使用 UART3。MSP432 先发送 "Hi"，然后等待来自 OpenMV 的回复。OpenMV 接收到 MSP432 发送的数据后，回复 "Hello World!"。