TI中文支持网这个程序为什么按下按键p1.3无中断响应？这是由产生pwm波的程序和ad采样显示（lcd1602）合成的，在产生pwm波的程序里p1.3可以响应。
#include "msp430g2553.h"
#include "lcd1602.c"
#define uchar unsigned char
#define uint unsigned int
uint a[11]={0},num; //定义数组用于储存采样值
uint shi=0,shifen=0,gewei=0,baifen=0,baifen1=0,shi1=0,shifen1=0,gewei1=0;
long P10=0,P11=0,P10_V=0,P11_V=0,A=0,A1=0; //定义变量
uchar table[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; //0~9
void ADC10_init(); //声明ADC10初始化函数
void display(); //显示函数
void pwm();
void main()
{ WDTCTL = WDTPW + WDTHOLD; //关狗
LCD_init_first(); LCD_init(); ADC10_init(); //初始化ADC10
while(1)
{
pwm();
ADC10CTL0 &=~ ENC; //禁用ADC10的Conversion
while(ADC10CTL1 & ADC10BUSY); //测忙
ADC10SA= (unsigned int)a; //获取a[]的首地址
ADC10CTL0 |= ADC10SC + ENC; //启动ADC10
_BIS_SR(LPM0_bits+GIE); //低功耗模式0，开中断
P10=a[1]+a[3]+a[5]+a[7]; //将A0采样值相加
P10= P10/4.0; //求平均值
P10_V = P10*250/1023; //转化为电压并乘以100
display(); //显示
}
}
void display()
{ uint P10_int;
P10_int=(uint)P10_V;
/*求A0采样的各个位*/
A=-14*P10_int+1733.3;
shi = A/1000; //求个位
gewei =(A%1000)/100; //求十分位
shifen =((A%1000)%100)/10; //求百分位
baifen =((A%1000)%100)%10;
/*显示A0处的值*/
LCD_write_command(0x80);
LCD_write_data(table[shi]);
LCD_write_data(table[gewei]);
LCD_write_data('.');
LCD_write_data(table[shifen]);
LCD_write_data(table[baifen]);
LCD_write_data('V');
}
void ADC10_init()
{
/* ADC中断使能+打开ADC10+打开基准生成电压+采样保持时间16*ADC10CLK+(VREF+ and VR-=AVS)+ADC10 multi+2.5V */
ADC10CTL0 = ADC10IE + ADC10ON + REFON + ADC10SHT_2 + SREF_1 + MSC + REF2_5V;
/* 重复序列转换+时钟源选择ADC10OSC+0分频+选择channel1 */
ADC10CTL1 = CONSEQ_3 + + ADC10DIV_0 + INCH_1;
ADC10AE0 |=BIT0+BIT1+BIT3; //打开模拟输入通道
ADC10DTC1 |= 0X08; //采样数为8
}
void pwm()
{ P1SEL |= BIT2;
P1DIR |= BIT2; // P1.2 as TA0.1 output
P1REN |= BIT3;
P1IES |= BIT3; //P1.3 high to low interrupt
_EINT();
P1IFG = 0;
P1IE |= BIT3; //Enable P1.3 interrupt
CCTL1 = OUTMOD_3; /* PWM output mode: 3 – PWM set/reset */
CCR0 = 195;
CCR1 = 15;
TACTL = TASSEL_2 + TACLR + MC_1; // SMCLK, UP mode.
__low_power_mode_0();
}
/*#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
__bic_SR_register_on_exit(CPUOFF); //唤醒CPU
}*/
#pragma vector = PORT1_VECTOR
__interrupt void port1_isr(void)
{
if (P1IFG & BIT3)
{
for(int i=0; i<10; i++);
CCR1 += 15;
if (CCR1 > 195)
CCR1 = 0;
P1IFG &= ~BIT3;
}
}
这是lcd1602的程序
#include <intrinsics.h>#include <msp430g2253.h>#include <msp430.h>
/***************************************************** 端口定义****************************************************/#define LCD_EN_PORT P1OUT //以下2个要设为同一个口#define LCD_EN_DDR P1DIR#define LCD_RS_PORT P1OUT //以下2个要设为同一个口#define LCD_RS_DDR P1DIR#define LCD_DATA_PORT P2OUT //以下3个要设为同一个口#define LCD_DATA_DDR P2DIR //一定要用高4位#define LCD_RS BIT6#define LCD_EN BIT7#define LCD_DATA BIT7|BIT6|BIT5|BIT4 //4位数据线连接模式/*************************************************** 预定义函数**************************************************/void LCD_init(void);void LCD_init_first(void);void LCD_en_write1(void); //上升沿使能void LCD_en_write2(void); //下降沿使能void LCD_write_command(unsigned char command);void LCD_write_data(unsigned char data);void LCD_set_xy (unsigned char x, unsigned char y);void LCD_write_string(unsigned char X,unsigned char Y, unsigned char *s);void LCD_write_char(unsigned char X,unsigned char Y, unsigned char data);void delay_1ms(void);void delay_nus(unsigned int n);void delay_nms(unsigned int n);/******************************************** LCD液晶操作函数*******************************************/void LCD_init_first(void) //LCD1602液晶初始化函数（热启动）{ delay_nms(500); LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出 LCD_EN_DDR|=LCD_EN; //设置EN方向为输出 LCD_RS_DDR|=LCD_RS; //设置RS方向为输出 delay_nms(50); LCD_write_command(0x30); delay_nms(50); LCD_write_command(0x30); delay_nms(5); LCD_write_command(0x30); delay_nms(500);}/******************************************* LCD1602液晶初始化函数*****************************************/void LCD_init(void){delay_nms(500);LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出LCD_EN_DDR|=LCD_EN; //设置EN方向为输出LCD_RS_DDR|=LCD_RS; //设置RS方向为输出delay_nms(500);LCD_write_command(0x28); //4位数据接口delay_nms(50);LCD_write_command(0x28); //4位数据接口delay_nms(50); LCD_write_command(0x28); //4位数据接口delay_nms(50); LCD_en_write2(); delay_nms(50);LCD_write_command(0x28); //4位数据接口delay_nms(500);LCD_write_command(0x01); //清屏LCD_write_command(0x0c); //显示开，关光标，不闪烁 LCD_write_command(0x06); //设定输入方式，增量不移位delay_nms(50);}/******************************************* 液晶使能上升沿*****************************************/void LCD_en_write1(void){ LCD_EN_PORT&=~LCD_EN; delay_nus(10); LCD_EN_PORT|=LCD_EN;}/******************************************* 液晶使能下降沿*****************************************/void LCD_en_write2(void){ LCD_EN_PORT|=LCD_EN; delay_nus(10); LCD_EN_PORT&=~LCD_EN;}/******************************************* 写指令函数*****************************************/void LCD_write_command(unsigned char command){ delay_nus(16); P2SEL=0x00; LCD_RS_PORT&=~LCD_RS; //RS=0 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); command=command<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0x0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写低四位 LCD_en_write2();}/******************************************* 写数据函数*****************************************/void LCD_write_data(unsigned char data){ delay_nus(16); P2SEL=0x00; LCD_RS_PORT|=LCD_RS; //RS=1 LCD_en_write1(); //E上升沿 LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); data=data<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写低四位 LCD_en_write2();}/******************************************* 写地址函数*****************************************/void LCD_set_xy( unsigned char x, unsigned char y ){ unsigned char address; if (y == 0) address = 0x80 + x; else address = 0xc0 + x; LCD_write_command( address);}/*******************************************LCD在任意位置写字符串，列x=0~15,行y=0,1*****************************************/void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s){LCD_set_xy( X, Y ); //写地址 while (*s) //写显示字符 { LCD_write_data( *s ); s++; }}/******************************************* LCD在任意位置写字符,列x=0~15,行y=0,1*****************************************/void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data){ LCD_set_xy( X, Y ); //写地址 LCD_write_data( data);}/******************************************* 1us延时函数*****************************************/void delay_1us(void){ asm("nop");}/******************************************* N us延时函数*****************************************/void delay_nus(unsigned int n){ unsigned int i; for (i=0;i<n;i++) delay_1us();}/******************************************* 1ms延时函数*****************************************/void delay_1ms(void){ unsigned int i; for (i=0;i<1140;i++);}/******************************************* N ms延时函数*****************************************/void delay_nms(unsigned int n){ unsigned int i=0; for (i=0;i<n;i++) delay_1ms();}
Maka Luo：
tianxiong Zhang
这个程序为什么按下按键p1.3无中断响应？这是由产生pwm波的程序和ad采样显示（lcd1602）合成的，在产生pwm波的程序里p1.3可以响应。
#include "msp430g2553.h"#include "lcd1602.c"
#define uchar unsigned char#define uint unsigned intuint a[11]={0},num; //定义数组用于储存采样值uint shi=0,shifen=0,gewei=0,baifen=0,baifen1=0,shi1=0,shifen1=0,gewei1=0;long P10=0,P11=0,P10_V=0,P11_V=0,A=0,A1=0; //定义变量uchar table[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; //0~9
void ADC10_init(); //声明ADC10初始化函数 void display(); //显示函数 void pwm(); void main() { WDTCTL = WDTPW + WDTHOLD; //关狗 LCD_init_first(); LCD_init(); ADC10_init(); //初始化ADC10 while(1) { pwm(); ADC10CTL0 &=~ ENC; //禁用ADC10的Conversion while(ADC10CTL1 & ADC10BUSY); //测忙 ADC10SA= (unsigned int)a; //获取a[]的首地址 ADC10CTL0 |= ADC10SC + ENC; //启动ADC10 _BIS_SR(LPM0_bits+GIE); //低功耗模式0，开中断
P10=a[1]+a[3]+a[5]+a[7]; //将A0采样值相加 P10= P10/4.0; //求平均值 P10_V = P10*250/1023; //转化为电压并乘以100 display(); //显示 } }void display() { uint P10_int; P10_int=(uint)P10_V; /*求A0采样的各个位*/ A=-14*P10_int+1733.3; shi = A/1000; //求个位 gewei =(A%1000)/100; //求十分位 shifen =((A%1000)%100)/10; //求百分位 baifen =((A%1000)%100)%10; /*显示A0处的值*/ LCD_write_command(0x80); LCD_write_data(table[shi]); LCD_write_data(table[gewei]); LCD_write_data('.'); LCD_write_data(table[shifen]); LCD_write_data(table[baifen]); LCD_write_data('V'); }
void ADC10_init() { /* ADC中断使能+打开ADC10+打开基准生成电压+采样保持时间16*ADC10CLK+(VREF+ and VR-=AVS)+ADC10 multi+2.5V */ ADC10CTL0 = ADC10IE + ADC10ON + REFON + ADC10SHT_2 + SREF_1 + MSC + REF2_5V; /* 重复序列转换+时钟源选择ADC10OSC+0分频+选择channel1 */ ADC10CTL1 = CONSEQ_3 + + ADC10DIV_0 + INCH_1; ADC10AE0 |=BIT0+BIT1+BIT3; //打开模拟输入通道 ADC10DTC1 |= 0X08; //采样数为8 }void pwm(){ P1SEL |= BIT2; P1DIR |= BIT2; // P1.2 as TA0.1 output P1REN |= BIT3; P1IES |= BIT3; //P1.3 high to low interrupt _EINT(); P1IFG = 0; P1IE |= BIT3; //Enable P1.3 interrupt
//参见下面完整配置代码 你再试试 你这里没讲P1.3配置输入模式。
P1DIR &= ~BIT3; // P1.3 INPUT P1REN |= BIT3; // P1.3 pullup P1IE |= BIT3; // P1.3 interrupt enabled P1IES |= BIT3; // P1.3 Hi/lo edge P1IFG &= ~BIT3; // P1.3 IFG cleared
CCTL1 = OUTMOD_3; /* PWM output mode: 3 – PWM set/reset */ CCR0 = 195; CCR1 = 15; TACTL = TASSEL_2 + TACLR + MC_1; // SMCLK, UP mode. __low_power_mode_0();}
/*#pragma vector=ADC10_VECTOR __interrupt void ADC10_ISR(void) { __bic_SR_register_on_exit(CPUOFF); //唤醒CPU }*/#pragma vector = PORT1_VECTOR__interrupt void port1_isr(void){ if (P1IFG & BIT3) { for(int i=0; i<10; i++); CCR1 += 15; if (CCR1 > 195) CCR1 = 0; P1IFG &= ~BIT3; }}
这是lcd1602的程序
#include <intrinsics.h> #include <msp430g2253.h> #include <msp430.h>/***************************************************** 端口定义 ****************************************************/ #define LCD_EN_PORT P1OUT //以下2个要设为同一个口 #define LCD_EN_DDR P1DIR #define LCD_RS_PORT P1OUT //以下2个要设为同一个口 #define LCD_RS_DDR P1DIR #define LCD_DATA_PORT P2OUT //以下3个要设为同一个口 #define LCD_DATA_DDR P2DIR //一定要用高4位 #define LCD_RS BIT6 #define LCD_EN BIT7 #define LCD_DATA BIT7|BIT6|BIT5|BIT4 //4位数据线连接模式 /*************************************************** 预定义函数 **************************************************/ void LCD_init(void); void LCD_init_first(void); void LCD_en_write1(void); //上升沿使能 void LCD_en_write2(void); //下降沿使能 void LCD_write_command(unsigned char command); void LCD_write_data(unsigned char data); void LCD_set_xy (unsigned char x, unsigned char y); void LCD_write_string(unsigned char X,unsigned char Y, unsigned char *s); void LCD_write_char(unsigned char X,unsigned char Y, unsigned char data); void delay_1ms(void); void delay_nus(unsigned int n); void delay_nms(unsigned int n); /******************************************** LCD液晶操作函数 *******************************************/ void LCD_init_first(void) //LCD1602液晶初始化函数（热启动） { delay_nms(500); LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出 LCD_EN_DDR|=LCD_EN; //设置EN方向为输出 LCD_RS_DDR|=LCD_RS; //设置RS方向为输出 delay_nms(50); LCD_write_command(0x30); delay_nms(50); LCD_write_command(0x30); delay_nms(5); LCD_write_command(0x30); delay_nms(500); } /***************************************** * * LCD1602液晶初始化函数 * ****************************************/ void LCD_init(void) { delay_nms(500); LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出 LCD_EN_DDR|=LCD_EN; //设置EN方向为输出 LCD_RS_DDR|=LCD_RS; //设置RS方向为输出 delay_nms(500); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_en_write2(); delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(500); LCD_write_command(0x01); //清屏 LCD_write_command(0x0c); //显示开，关光标，不闪烁 LCD_write_command(0x06); //设定输入方式，增量不移位 delay_nms(50); } /***************************************** * * 液晶使能上升沿 * ****************************************/ void LCD_en_write1(void) { LCD_EN_PORT&=~LCD_EN; delay_nus(10); LCD_EN_PORT|=LCD_EN; } /***************************************** * * 液晶使能下降沿 * ****************************************/ void LCD_en_write2(void) { LCD_EN_PORT|=LCD_EN; delay_nus(10); LCD_EN_PORT&=~LCD_EN; } /***************************************** * * 写指令函数 * ****************************************/ void LCD_write_command(unsigned char command) { delay_nus(16); P2SEL=0x00; LCD_RS_PORT&=~LCD_RS; //RS=0 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); command=command<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0x0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写低四位 LCD_en_write2(); } /***************************************** * * 写数据函数 * ****************************************/ void LCD_write_data(unsigned char data) { delay_nus(16); P2SEL=0x00; LCD_RS_PORT|=LCD_RS; //RS=1 LCD_en_write1(); //E上升沿 LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); data=data<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写低四位 LCD_en_write2(); } /***************************************** * * 写地址函数 * ****************************************/ void LCD_set_xy( unsigned char x, unsigned char y ) { unsigned char address; if (y == 0) address = 0x80 + x; else address = 0xc0 + x; LCD_write_command( address); } /***************************************** * *LCD在任意位置写字符串，列x=0~15,行y=0,1 * ****************************************/ void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) { LCD_set_xy( X, Y ); //写地址 while (*s) //写显示字符 { LCD_write_data( *s ); s++; } } /***************************************** * * LCD在任意位置写字符,列x=0~15,行y=0,1 * ****************************************/ void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data) { LCD_set_xy( X, Y ); //写地址 LCD_write_data( data); } /***************************************** * * 1us延时函数 * ****************************************/ void delay_1us(void) { asm("nop"); } /***************************************** * * N us延时函数 * ****************************************/ void delay_nus(unsigned int n) { unsigned int i; for (i=0;i<n;i++) delay_1us(); } /***************************************** * * 1ms延时函数 * ****************************************/ void delay_1ms(void) { unsigned int i; for (i=0;i<1140;i++); } /***************************************** * * N ms延时函数 * ****************************************/ void delay_nms(unsigned int n) { unsigned int i=0; for (i=0;i<n;i++) delay_1ms(); }
tianxiong Zhang：
回复 Maka Luo:
谢谢您的解答，我找出问题了，
ADC10AE0 |=BIT0+BIT1+BIT3; //打开模拟输入通道
这里已经用过p1.3口了
adc配置IO口是否会影响IO口的SEL的选择？
比如设置某个脚为模拟输入通道然后这个脚的SEL就不起作用了
Maka Luo：
回复 tianxiong Zhang:
配置成第二功能后，GPIO就失效了。
