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#include "msp430x14x.h"
#define uchar unsigned char
#define uint unsigned int
#define URXD1 BIT7
#define UTXD1 BIT6
uchar dataSedBuffer[100]={"123"}; //发送数据缓存区
uchar redySedLen = 4; //准备发送的数据的总长度,包括'\0'
uchar curtSedLen = 0; //当前已经发送的数据的长度
void Delay_us(uint count)
{
while(count-- ){_NOP();_NOP();_NOP();}
}
void Init_clk()
{
uchar i;
WDTCTL = WDTPW +WDTHOLD;
BCSCTL1 &= ~XT2OFF; //8MHz
BCSCTL2 &= SELM1 +SELS;
do
{
IFG1 &= ~OFIFG;
for(i=0;i<100;i++);
}while((IFG1 & OFIFG)!=0);
IFG1 &= ~OFIFG;
}
void Init_usart()
{
U1CTL = SWRST;
U1CTL |= CHAR; //8位数据
U1TCTL |= SSEL1; //时钟SMCLK
U1BR0 = 0x45;
U1BR1 = 0x00; //波特率115200
U1MCTL = 0x00; //小数不设置
ME2 |= UTXE1; //使能UART1的发送
U1CTL &= ~SWRST;
P3SEL |= UTXD1; //端口功能设置为第二功能
}
void main()
{
Init_clk();
Init_usart();
while(1)
{
U1TXBUF = dataSedBuffer[curtSedLen];
if(curtSedLen >= redySedLen)
{
curtSedLen = 0;
Delay_us(60000);
}
while((IFG2 & UTXIFG1)==0);
}
}
#include "msp430x14x.h"
#define uchar unsigned char
#define uint unsigned int
#define URXD1 BIT7
uchar dataRecBuffer[100]; //接收数据缓存区
uchar saveRecLen = 0; //最后存储收到数据的总长度
uchar curtRecLen = 0; //当前收到的数据长度
void Delay_us(uint count)
{
while(count-- ){_NOP();};
}
void Init_clk()
{
uchar i;
WDTCTL = WDTPW +WDTHOLD;
BCSCTL1 &= ~XT2OFF; //8MHz
BCSCTL2 &= SELM1 +SELS;
do
{
IFG1 &= ~OFIFG;
for(i=0;i<100;i++);
}while((IFG1 & OFIFG)!=0);
IFG1 &= ~OFIFG;
}
void Init_usart()
{
U1CTL = SWRST;
U1CTL |= CHAR; //8位数据
U1TCTL |= SSEL1; //时钟SMCLK
U1BR0 = 0x45;
U1BR1 = 0x00; //波特率115200
U1MCTL = 0x00; //小数设置
ME2 |= URXE1; //使能UART1的发送和接收
U1CTL &= ~SWRST;
IE2 |= URXIE1; //UART1接收中断使能
P3SEL |= URXD1; //端口功能设置为第二功能
}
#pragma vector = UART1RX_VECTOR
__interrupt void UART1_RX_ISR(void)
{
dataRecBuffer[curtRecLen] = RXBUF1; //接收数据
curtRecLen += 1;
if(dataRecBuffer[curtRecLen-1] == 13 ||dataRecBuffer[curtRecLen-1] == 0) //接收到ENTER(换行)符
{
saveRecLen = curtRecLen-1; //保存收到的总长度
curtRecLen = 0;
}
}
void main()
{
Init_clk();
Init_usart();
_EINT();
while(1){};
}
#include <MSP430X14X.H>
void Init_UART1(void); //声明UART初始化函数
void Init_Timer_A(void); //初始化定时器模块
#define INBUF_LEN 4 //数据长度
unsigned char UART1_RXBUF1[INBUF_LEN];
char checksum,count3;
char TX_Flag;
void send_string_com( unsigned char *str, unsigned int strlen);
void main(void)
{
WDTCTL = WDTPW + WDTHOLD ; //关闭看门狗
Init_UART1(); //UART初始化函数
_EINT(); //通用中断允许
while(1) //主循环
{
if( TX_Flag ==1) //如果取数标志已置位,就将读到的数从串口发出
{
TX_Flag = 0 ; //取数标志清0
send_string_com(UART1_RXBUF1,INBUF_LEN);
}
}
}
void Init_UART1(void)
{
UCTL1 &=~ SWRST; // SWRST复位,USART允许
UCTL1 = 0x10; // 8位数据位,1位停止位,无校验
UBR01 = 0x0D;
UBR11 = 0x00; // 使用32KHz晶振时波特率为2400bps
UMCTL1 = 0x6B; // 位调整
UTCTL1 = 0x10; // 选定ACLK(32KHz晶振)为时钟源
ME2 |= 0x30; //UART发送及接收模块允许
P3SEL = 0xC0; // P3.6 P3.7被USART1发送模块占用
P3DIR = 0X40; // P3.6 输出,P3.7 输入
IE2 |= URXIE1; //接收中断允许
}
//向串口发送一个字符
void send_char_com( unsigned char ch)
{
TXBUF1=ch;
while ((UTCTL1&0x01)==0 );
}
//向串口发送一个字符串,strlen为该字符串长度
void send_string_com( unsigned char *str, unsigned int strlen)
{
unsigned int k= 0 ;
do
{
send_char_com(*(str + k));
k++;
} while (k < strlen);
}
/*****************************************************************************
USART1接收中断函数
******************************************************************************/
#pragma vector=UART1RX_VECTOR
__interrupt void UART1(void)
{
if (URXIFG1)
{
unsigned char ch;
IFG2 &=~ URXIFG1 ;
ch=RXBUF1;
if (ch> 127 )
{
count3= 0 ;
UART1_RXBUF1[count3]=ch;
checksum= ch- 128 ;
}
else
{
count3++;
UART1_RXBUF1[count3]=ch;
checksum ^= ch;
if ( (count3==(INBUF_LEN- 1 )) && (!checksum) )
{
TX_Flag = 1 ;
//如果串口接收的数据达到INBUF_LEN个,且校验没错,
//就置位取数标志
}
}
}
}