新手求助怎么控制红灯

monrother

新手求助怎么控制红灯 [复制链接]

本帖最后由 monrother 于 2014-4-6 15:30 编辑

板子型号：MSP-EXP430G2553
学校的电子赛要求两个：1.让红灯由亮到暗再到亮循环
2.让红灯根据温度显示出不同的亮度，温度高时亮，温度低时暗。
我现在刚刚会用CCS把程序烧进板子，知道头文件中BIT6是表示绿灯，请问红灯怎么表示，还有亮度怎么控制？

huixianfxt

灯的话看你的硬件连接呢，亮度可以由PWM控制呢。。。

monrother

huixianfxt 发表于 2014-4-6 15:38
灯的话看你的硬件连接呢，亮度可以由PWM控制呢。。。

我知道BIT0是控制红灯了，现在要解决的是怎么学习PWM。大神能教下吗？留个QQ啥的

youluo

亮度肯定是PWM控制电流的。

qinkaiabc

monrother 发表于 2014-4-6 07:41
我知道BIT0是控制红灯了，现在要解决的是怎么学习PWM。大神能教下吗？留个QQ啥的

参考例程就行了

monrother

qinkaiabc 发表于 2014-4-6 15:53
参考例程就行了

哪里有教程或者例程?找了半天没有找到。还有温度值怎么获取？

qinkaiabc

monrother 发表于 2014-4-6 08:08
哪里有教程或者例程?找了半天没有找到。还有温度值怎么获取？

最好去图书馆借本书看看。

查看详情

monrother

这个要求只是初筛，过了的才能参加培训。过完节就要交了

huixianfxt

monrother 发表于 2014-4-6 16:51
这个要求只是初筛，过了的才能参加培训。过完节就要交了

温度（内部）采集参照那上面的ADC10例程呢，里面有呢。。。根据温度输出不同占空比的波形就行了呢....

msp430_now

你在TI的网站就可以下到你的单片机对应的示例程序，里面有一个读取温度的示例和一个PWM的示例，你参照例子就可以做你的程序，相关资料你还可以百度一下430的呼吸灯，应该也有相应的范例

gh131413

这个竞赛的题目蛮简单的（以前一直以为竞赛难度高），呵呵，循环PWM调光和温度检测控制LED亮暗

karaok

//******************************************************************************
//  MSP430G2xx3 Demo - Timer_A, PWM TA1, Up/Down Mode, 32kHz ACLK
//
//  Description: This program generates one PWM output on P1.2 using
//  Timer_A configured for up/down mode. The value in CCR0, 128, defines the
//  PWM period/2 and the value in CCR1 the PWM duty cycle. Using
//  32kHz ACLK as TACLK, the timer period is 7.8ms with a 75% duty cycle on
//  P1.2. Normal operating mode is LPM3.
//  ACLK = TACLK = LFXT1 = 32768Hz, MCLK = default DCO
//  //* External watch crystal installed on XIN XOUT is required for ACLK *//
//
//             MSP430G2xx3
//          -----------------
//       /|\|             XIN|-
//       | |                | 32kHz
//       --|RST       XOUT|-
//          |                |
//          |       P1.2/TA1|--> CCR1 - 75% PWM
//
//  D. Dang
//  Texas Instruments, Inc
//  December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************

#include

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  P1DIR |= 0x0C;                         // P1.2 and P1.3 output
  P1SEL |= 0x0C;                         // P1.2 and P1.3 TA1/2 otions
  CCR0 = 128;                            // PWM Period/2
  CCTL1 = OUTMOD_6;                      // CCR1 toggle/set
  CCR1 = 32;                               // CCR1 PWM duty cycle
  TACTL = TASSEL_1 + MC_3;                // ACLK, up-down mode

  _BIS_SR(LPM3_bits);                      // Enter LPM3
}

这是TI的官方PWM代码，但看规格书P1.0好象不能使用PWM。
下面这个是以前一个供你参考，对错不知道。
#include "MSP430G2202.h"
#define PWM_P 1000
#define PWM_S 400
#define PWM_L 750
#define PWM_T 10

#define KEY1 BIT1
#define LED1 BIT2 //P1.2|TA0.1  P2.1=TA1.1

#define KEY2 BIT3
#define LED2 BIT4 //P1.4|TA0.2 P2.4=TA1.2

void POWER_ON(unsigned char);
void POWER_OFF(unsigned char);
void LED_DIM(unsigned char);
void DIM_UP(unsigned char);
void DIM_DOWN(unsigned char);
void Delay(int);
unsigned char POWER_STU1=0;
//unsigned char POWER_STU2=0;
unsigned char COUNT_UP=0;
/////////////////////////
//void POWER_ON(void);
//void POWER_OFF(void);
//void LED_DIM(void);
//void Delay(int);
//void DIM_UP(void);
//void DIM_DOWN(void);

//unsigned char POWER_STU=0;
//unsigned char COUNT_UP=1;

void main( void )
{
  // Stop watchdog timer to prevent time out reset
  WDTCTL = WDTPW + WDTHOLD;
  DCOCTL|= MOD0+DCO0;//+DCO1;//+DCO2          // Set DCO Frequence select
  BCSCTL1|=RSEL2;//+RSEL0;// RSEL3++RSEL1;    // Set DCO Resistor
// P1SEL |= LED1+LED2;                   // P1.6 TA1/2 options
//P1SEL2 |=LED2;
  P1OUT &= ~(LED1+LED2);
  P1DIR |= (LED1+LED2);//                      // P1.0 and P1.6 output

  CCR0 = PWM_P;                         // PWM Period
  CCTL1 = OUTMOD_7;                      // CCR1 reset/set
  CCTL2 = OUTMOD_7;                      // CCR2 reset/set
//TACTL = TASSEL_2 + MC_1;                // SMCLK, up mode

  P1IE |= BIT3;                         // P1.3 interrupt enabled
  P1IES|= BIT3;                            // P1.3 H/L Hiedge
  P1IFG &= ~(BIT3);                         // P1.3 IFG cleared
  _EINT();


_BIS_SR(LPM0_bits);                      // Enter LPM0

}

/*********** P1 port 中断程序 ***************/
#pragma vector=PORT1_VECTOR
__interrupt void Port_11(void)
{ switch(P1IFG&(KEY1+KEY2))
{
  case KEY1:
Delay(20);//延迟,防误判

if((P1IN&KEY1)==0)    //再次确认键已经按下;
   { Delay(500);//延时0.5S
      if((P1IN & KEY1)!=0)
      {
         if ((POWER_STU1&LED1)==0)
         {
            POWER_ON(LED1);
            POWER_STU1|=LED1;
         }
         else
         {
            POWER_OFF(LED1);
            POWER_STU1&=~LED1;
         }
   }

      Delay(1000);
      LED_DIM(LED1);
         }

         P1IFG &=~(KEY1);
  break;

  case KEY2:
Delay(20);//延迟,防误判

if((P1IN&KEY2)==0)    //再次确认键已经按下;
   { Delay(500);//延时0.5S
      if((P1IN & KEY2)!=0)
      {
         if ((POWER_STU1&LED2)==0)
         {
            POWER_ON(LED2);
            POWER_STU1|=LED2;
         }
         else
         {
            POWER_OFF(LED2);
            POWER_STU1&=~LED2;
         }
      }

      Delay(1000);
      LED_DIM(LED2);

   }

   P1IFG &=~(KEY2);
  break;

   }

}
//LED渐变调光
void LED_DIM(unsigned char LEDx)
{ unsigned char KEYx;
if (LEDx==LED1)
{KEYx=KEY1;}
else
{
  if(LEDx==LED2)
  {
KEYx=KEY2;
  }
  else
  {
KEYx=(KEY1+KEY2);
  }
}

   while(POWER_STU1&&((P1IN&KEYx)==0))                   //P1.3为LOW，开始自动调光
   {  Delay(10);
      if(COUNT_UP)
         {
         DIM_UP(LEDx);
         }
      else
         {
         DIM_DOWN(LEDx);

         }
   }

P1IFG &=~(KEYx);

}

  //POWER ON OFF

void POWER_ON(unsigned char LED_x)
{
   POWER_STU1|=LED_x;
   P1DIR|=LED_x;
   P1SEL|=LED_x;
   P2SEL|=(LED_x&LED2);

   CCR0 = PWM_P;                            // PWM Period
   CCTL2=CCTL1 = OUTMOD_7;
   switch(LED_x)
   {
   case LED1+LED2:
      CCR2=CCR1=5;                                  // CCR1 reset/set
      for (; CCR1<700; CCR1+=10)
      {
      CCR2=CCR1;
      Delay(10);
      TACTL = TASSEL_2 + MC_1;
      }
      break;
      case LED1:
      CCR1=5;                                  // CCR1 reset/set
      for (; CCR1<700; CCR1+=10)
      {
      Delay(10);
      TACTL = TASSEL_2 + MC_1;
      }
      break;
   case LED2:
      CCR1=5;                                  // CCR1 reset/set
      for (; CCR2<700; CCR2+=10)
      {
      Delay(10);
      TACTL = TASSEL_2 + MC_1;
      }
      break;
   }
}

void POWER_OFF(unsigned char LED_y)
  {  int i;
if(CCR1>CCR2)
{i=CCR1;}
else{i=CCR2;}

   switch(LED_y)
   {
   case LED1+LED2:
   while(i>15)
   {
   Delay(10);
   CCR1-=10;
   CCR2-=10;
   TACTL = TASSEL_2 + MC_1;
   }
   break;
   //////
   case LED1:
   while(CCR1>15)
   {
   Delay(10);
   CCR1-=10;
   TACTL = TASSEL_2 + MC_1;
   }
   break;
///////
   case LED2:
   while(CCR2>15)
   {
   Delay(10);
   CCR2-=10;
   TACTL = TASSEL_2 + MC_1;
   }
   break;
   P1OUT&=~(LED_y);
   P1DIR&=~(LED_y);
   POWER_STU1&=~(LED_y);

  }

//
void DIM_UP(unsigned char LED_n)
{
int i;
if(CCR1>CCR2)
{i=CCR1;}
else
{i=CCR2;}

   switch (LED_n)
   {
   case LED1+LED2:
   if(i<1000)
   {  Delay(10);
      CCR1+=10;
      CCR2+=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=0;}
   break;
   ///
   case LED1:
   if(CCR1<1000)
   {  Delay(10);
      CCR1+=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=0;}
   break;
   ////
case LED2:
   if(CCR2<1000)
   {  Delay(10);
      CCR2+=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=0;}
   break;
}
}
//
  void DIM_DOWN(unsigned char LED_n)
{
   int i;
if(CCR1          {i=CCR1;}
else{i=CCR2;}

   switch (LED_n)
   {
   case LED1+LED2:
   if(i>15)
   {  Delay(10);
      CCR1-=10;
      CCR2-=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=1;}
   break;
   ///
   case LED1:
   if(CCR1>15)
   {  Delay(10);
      CCR1-=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=1;}
   break;
   ////
case LED2:
   if(CCR2>15)
   {  Delay(10);
      CCR2-=10;
      TACTL = TASSEL_2 + MC_1;
   }
   else{COUNT_UP=1;}
   break;
}

//

//Delay function
void Delay(int i){}

monrother

gh131413 发表于 2014-4-8 09:23
这个竞赛的题目蛮简单的（以前一直以为竞赛难度高），呵呵，循环PWM调光和温度检测控制LED亮暗

这个不是竞赛，是参加竞赛培训资格的选人题

jixianghua

不懂，支持，学习了

monrother

第一个程序我是这么写的……
#include

void main(void)
{
WDTCTL = WDTPW + WDTHOLD;                // Stop watchdog timer

if (CALBC1_1MHZ == 0xFF || CALDCO_1MHZ == 0xFF)
{
while(1); // If calibration constants erased, trap CPU!!
}

// Configure Basic Clock
BCSCTL1 = CALBC1_1MHZ; // Set range
DCOCTL = CALDCO_1MHZ; // Set DCO step + modulation
BCSCTL3 |= LFXT1S_2; // Set LFXT1

P1DIR = BIT0; // P1.6 output (green LED)
P1OUT = 0; // LED off

IFG1 &= ~OFIFG;         // Clear OSCFault flag
BCSCTL2 |=SELM_1 + DIVM_0; // Set MCLK

for(;;)
{
int i;

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(1000);
P1OUT = 0;
_delay_cycles(5000-1000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(2000);
P1OUT = 0;
_delay_cycles(5000-2000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(3000);
P1OUT = 0;
_delay_cycles(5000-3000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(4000);
P1OUT = 0;
_delay_cycles(5000-4000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(5000);
P1OUT = 0;
_delay_cycles(5000-5000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(5000);
P1OUT = 0;
_delay_cycles(5000-5000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(4000);
P1OUT = 0;
_delay_cycles(5000-4000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(3000);
P1OUT = 0;
_delay_cycles(5000-3000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(2000);
P1OUT = 0;
_delay_cycles(5000-2000);}
_delay_cycles(500000);

for( i=0;i<100;i++)
{P1OUT = BIT0;
_delay_cycles(1000);
P1OUT = 0;
_delay_cycles(5000-1000);}
_delay_cycles(500000);

}
}

表示其实就三句话，只不过delay不能接变量，谁告诉我怎么精简一下最好