msp430f5529标准库学习之串口通信

串口通信"/>

msp430f5529标准库学习之串口通信

目录

一、串口初始化

二、串口打印函数：

三、中断处理函数

一、串口初始化

串口1主要代码

void usart0_init(void)
{//初始化gpioGPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P3, GPIO_PIN3+GPIO_PIN4);USCI_A_UART_initParam usart0_param={0};usart0_param.selectClockSource=USCI_A_UART_CLOCKSOURCE_SMCLK;//选择时钟,1048576Hz//设置波特率9600hzusart0_param.clockPrescalar=6;usart0_param.firstModReg=13;usart0_param.secondModReg=0;usart0_param.overSampling = USCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION;usart0_param.parity = USCI_A_UART_NO_PARITY;   //无校验位usart0_param.msborLsbFirst = USCI_A_UART_LSB_FIRST;  //低位先行usart0_param.numberofStopBits = USCI_A_UART_ONE_STOP_BIT;  //1停止位usart0_param.uartMode = USCI_A_UART_MODE;USCI_A_UART_init(USCI_A0_BASE, &usart0_param);//串口初始化USCI_A_UART_clearInterrupt(USCI_A0_BASE,USCI_A_UART_RECEIVE_INTERRUPT | USCI_A_UART_TRANSMIT_INTERRUPT);//清除接收发送中断USCI_A_UART_enable(USCI_A0_BASE);//串口使能
}void usart1_init(void)
{//初始化gpioGPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P4, GPIO_PIN5+GPIO_PIN4);USCI_A_UART_initParam usart1_param={0};usart1_param.selectClockSource=USCI_A_UART_CLOCKSOURCE_SMCLK;//选择时钟,1048576Hz//设置波特率9600hzusart1_param.clockPrescalar=6;usart1_param.firstModReg=13;usart1_param.secondModReg=0;usart1_param.overSampling = USCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION;usart1_param.parity = USCI_A_UART_NO_PARITY;   //无校验位usart1_param.msborLsbFirst = USCI_A_UART_LSB_FIRST;  //低位先行usart1_param.numberofStopBits = USCI_A_UART_ONE_STOP_BIT;  //1停止位usart1_param.uartMode = USCI_A_UART_MODE;USCI_A_UART_init(USCI_A1_BASE, &usart1_param);//串口初始化USCI_A_UART_clearInterrupt(USCI_A1_BASE,USCI_A_UART_RECEIVE_INTERRUPT | USCI_A_UART_TRANSMIT_INTERRUPT);//清除接收发送中断USCI_A_UART_enable(USCI_A1_BASE);//串口使能
}

波特率的配置可以使用工具进行配置，网址：.html

注意：在选择时钟时一定要根据当前系统时钟进行设置，如果当前系统时钟为16Mhz，就要选16*1048576Hz

二、串口打印函数：

#include <string.h>
#include <stdarg.h>
#include <stdio.h>//串口打印函数
void myprintf(uint16_t baseAddress, const char *format,...)
{uint32_t length;va_list args;uint32_t i;char TxBuffer[128] = {0};va_start(args, format);length = vsnprintf((char*)TxBuffer, sizeof(TxBuffer), (char*)format, args);va_end(args);for(i = 0; i < length; i++){USCI_A_UART_transmitData(baseAddress, TxBuffer[i]);if(baseAddress==USCI_A0_BASE){UCA0TXBUF =TxBuffer[i]; // 发送数据while(!(UCA0IFG & UCTXIFG)); // 等待发送缓冲区准备好}else{UCA1TXBUF =TxBuffer[i]; // 发送数据while(!(UCA1IFG & UCTXIFG)); // 等待发送缓冲区准备好}}
}

三、中断处理函数

#pragma vector=USCI_A0_VECTOR
__interrupt void USCI_A0_ISR (void)
{uint8_t receivedData = 0;switch (__even_in_range(UCA0IV,4)){case 0: break;//无中断case 2://接收中断receivedData = USCI_A_UART_receiveData(USCI_A0_BASE);//接收数据USCI_A_UART_transmitData(USCI_A0_BASE,receivedData);//开始数据传输break;case 4: break;//发送中断default: break;}
}#pragma vector=USCI_A1_VECTOR
__interrupt void USCI_A1_ISR (void)
{uint8_t receivedData = 0;switch (__even_in_range(UCA0IV,4)){case 0: break;//无中断case 2://接收中断receivedData = USCI_A_UART_receiveData(USCI_A1_BASE);//接收数据USCI_A_UART_transmitData(USCI_A1_BASE,receivedData);//开始数据传输break;case 4: break;//发送中断default: break;}
}