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標(biāo)題: msp430g2452數(shù)字收音機數(shù)碼管顯示 [打印本頁]

作者: 51黑ss 時間: 2016-3-30 19:47
標(biāo)題: msp430g2452數(shù)字收音機數(shù)碼管顯示
   手上有個收音機模塊，借鑒51單片機例程，自己430寫了個小程序。用數(shù)碼管顯示。

   剛寫好了，又被刷沒有了，我哭了，還得再寫，這太啃了吧。

   言歸正傳，這個小實驗也是我無意中想的，手中有430的片子，又想自己做個小東西，只要能個簡單的電子收音機，程序代碼都是借鑒的，所以這個只是玩玩而已，以供參考。

//iic.h 這個是收音機的驅(qū)動程序，我是借鑒新浪一位網(wǎng)友c51程序?qū)懙茫蠹宜严戮椭懒恕?br /> #include"config.h"

uchar  fm_write[5]={0x00,0x00,0x31,0x17,0x00};
uchar  fm_read[5]={0,0,0,0,0};
uint freq,PLL,frequency;
uchar count;
uchar mode,hisi;
//msp430內(nèi)部PLL時鐘12M，最大可以達到16M.
void extern_16m()
{
WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
if (CALBC1_12MHZ==0xFF) // If calibration constant erased
{
while(1);                            // do not load, trap CPU!!
}
DCOCTL = 0;                            // Select lowest DCOx and MODx settings
BCSCTL1 = CALBC1_12MHZ;
DCOCTL = CALDCO_12MHZ;                   // Load 8MHz constants
frequency=10585;
}

void iic_start()
{
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA1;                //發(fā)送起始條件的數(shù)據(jù)信號
delay_us(1);
SCL1;
delay_us(5);          //起始條件建立時間大于4.7us,延時

SDA0;                //發(fā)送起始信號
delay_us(5);          // 起始條件鎖定時間大于4μs

SCL0;                //鉗住I2C總線，準(zhǔn)備發(fā)送或接收數(shù)據(jù)
// delay_us(2);
}

void iic_stop()//總線結(jié)束

{
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA0;                //發(fā)送結(jié)束條件的數(shù)據(jù)信號
delay_us(1);          //發(fā)送結(jié)束條件的時鐘信號
SCL1;                //結(jié)束條件建立時間大于4us
delay_us(5);

SDA1;                //發(fā)送I2C總線結(jié)束信號
delay_us(1);
}

void write_8bit(uchar c)
{
uchar BitCnt;
SDA_DIR_OUT;
SCL_DIR_OUT;
for(BitCnt=0;BitCnt<8;BitCnt++) //要傳送的數(shù)據(jù)長度為8位
{
if(c&0x80)
SDA1;                         //判斷發(fā)送位
else
SDA0;
delay_us(1);
SCL1;
delay_us(5);
c=c<<1;
SCL0;                         //置時鐘線為高，通知被控器開始接收數(shù)據(jù)位
delay_us(1);
}
}
uchar read_8bit()//讀取8bit數(shù)據(jù)
{
SCL_DIR_OUT;
SDA_DIR_IN;
uchar i,dat=0;
for(i=0;i<8;i++)
{ SCL1;
dat<<=1;
if(SDA_IN==0x40)
dat|=0x01;
delay_us(5);
SCL0;
}
return(dat);
}

void send_ack()//發(fā)送認(rèn)可位，用于讀取數(shù)據(jù)的認(rèn)可
{  SDA_DIR_OUT;
SCL_DIR_OUT;
SDA0;
delay_us(1);
SCL1;
delay_us(5);
SCL0;
}

void send_noack()
{
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA1;
delay_us(1);
SCL1;
delay_us(5);
SDA0;
SCL0;
}

uchar check_ack()//檢測確認(rèn)位，如果返回值是0表示數(shù)據(jù)傳輸成功
{  uchar ack_bit;
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA1;
delay_us(1);
SCL1;
delay_us(5);
SDA_DIR_IN;
ack_bit=SDA_IN;
SCL0;
return(ack_bit);

}

void get_frequency()
{  ulong y;
y=PLL;
hisi=fm_write[2]&0x10;
if(hisi)
freq=(y*8192+225000)/10000;
else
freq=(y*8192-225000)/10000 ;

}

void get_pll()
{ ulong freq1,y=frequency;
freq1=y*10000;
hisi=fm_write[2]&0x10;
if(hisi)
PLL=((freq1+225000)*4)/32768;
else
PLL=((freq1-225000)*4)/32768;

}

void read_5byte()
{uchar i,tempH,tempL;
iic_start();
write_8bit(read_order);
check_ack();
for(i=0;i<5;i++)
{fm_read[i]=read_8bit();
send_ack();
}
send_noack();
iic_stop();
tempH=fm_read[0];
tempL=fm_read[1];
tempH&=0x3f;
PLL=tempH*256+tempL;
get_frequency();

}

void write_5byte()
{uchar i;
iic_start();
write_8bit(write_order);
check_ack();
for(i=0;i<5;i++)
{write_8bit(fm_write[i]);
check_ack();
}
iic_stop();
}

void refurbish_5767()//FM收音芯片數(shù)據(jù)刷新一次
{
get_pll();//計算PLL,
fm_write[0]=PLL/256;
fm_write[1]=PLL%256;
fm_write[2]=0x31;
fm_write[3]=0x11;
fm_write[4]=0x00;
if(mode)fm_write[2]|=0x80;//給SUD=1，向上搜索模式
else fm_write[2]&=0x7f;//給SUD=0，向下搜索模式
write_5byte();
read_5byte();

}

//config.h

#include "io430.h"
#define CPU_F ((double)12000000) //外部高頻晶振8MHZ
//#define CPU_F ((double)32768) //外部低頻晶振32.768KHZ
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))

#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define SDA_DIR_OUT P1DIR|=BIT6
#define SDA_DIR_IN P1DIR&=~BIT6
#define SCL_DIR_OUT P1DIR|=BIT7

#define SDA_IN P1IN&BIT6

#define SDA1 P1OUT|=BIT6
#define SDA0 P1OUT&=~BIT6
#define SCL1 P1OUT|=BIT7
#define SCL0 P1OUT&=~BIT7

#define max_freq 12800
#define min_freq 7600
#define write_order 0xc0
#define read_order 0xc1

#define keycode P1IN&0x03

//key.h
#include "io430.h"
uchar key_value;
uchar key_code;
void key_init()
{
P1IE |= BIT0+BIT1+BIT2;             // P1.0-P1.2 IO口中斷使能
P1IES |= 0x07;                      // P1.0-P1.2 IO口邊沿觸發(fā)中斷方式設(shè)置
P1IFG &= ~(BIT0+BIT1+BIT2);          // P1.0-P1.2 IO口中斷標(biāo)志位清除

}
//外部中斷查詢方式，如果有中斷就運行程序
void key_set()
{
if(key_value!=0)
{
switch(key_value)
{
case 0x01:
switch(mode)
{
case 0:mode=1;break;
case 1:mode=0;break;
default:mode=0;break;
}
break;
case 0x02:
switch(mode)
{
case 0:++frequency;break;
case 1:--frequency;break;
default:break;
}
break;

case 0x03:
switch(mode)
{
case 0:frequency+=10;break;
case 1:frequency-=10;break;
default:break;
}
break;
default:break;
}

if(frequency>max_freq)
frequency=min_freq;
if(frequency frequency=max_freq;
key_code=3*mode+key_value;
key_value=0;
}

}

//外部中斷判斷按鍵
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
switch (P1IFG&0x07)
{
case 0x01: key_value=0x01;
break;
case 0x02: key_value=0x02;
break;
case 0x04:  key_value=0x03;
break;
default:  P1IFG = 0;  key_value=0;          // P2.0-P2.2 IO口中斷標(biāo)志位清除
break;
}
P1IFG = 0;          // P2.0-P2.2 IO口中斷標(biāo)志位清除
}

//ta.h
#include"config.h"
uint t;
uchar set_hex;
extern void display();
void init_TA()
{
TACCTL0 = CCIE;                         // TACCR0 interrupt enabled
TACCR0 = 60000;                         //5ms中斷一次
TACTL = TASSEL_2 + MC_1;                // SMCLK, upmode
}

//顯示在數(shù)碼管上，我用的是cd4511,占用6的io口顯示數(shù)碼管，p2.0-p2.1位選，p2.2-p2.5段選。
void display()
{
P1OUT|=BIT3;
P2OUT=0X00;
switch(set_hex)
{
case 0:set_hex=1;P2OUT|=BIT0;P2OUT|=key_code<<2;break;
case 1:set_hex=0;P2OUT|=BIT1;P2OUT|=mode<<2;break;
default:break;
}
P1OUT&=-BIT3;

}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{

display();
if(++t==50)
{
t=0;                      //每250ms刷新數(shù)據(jù)
refurbish_5767();//FM收音芯片數(shù)據(jù)刷新一次

}
}

//main.c
#include"iic.h"
#include"key.h"
#include"config.h"
#include"ta.h"
#include"shumaguan.h"
int main( void )
{
extern_16m();
key_init();
init_TA();
shumaguan_init();
__bis_SR_register(GIE);
while(1)
{

key_set();
}
}

//iic.h
#include"config.h"

uchar  fm_write[5]={0x00,0x00,0x31,0x17,0x00};
uchar  fm_read[5]={0,0,0,0,0};
uint freq,PLL,frequency;
uchar count;
uchar mode,hisi;

void extern_16m()
{
WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  if (CALBC1_12MHZ==0xFF) // If calibration constant erased
  {
while(1);                            // do not load, trap CPU!!
  }
  DCOCTL = 0;                            // Select lowest DCOx and MODx settings
  BCSCTL1 = CALBC1_12MHZ;
  DCOCTL = CALDCO_12MHZ;                   // Load 8MHz constants
  frequency=10585;
}

void iic_start()
{
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA1;                //發(fā)送起始條件的數(shù)據(jù)信號
delay_us(1);
SCL1;
delay_us(5);          //起始條件建立時間大于4.7us,延時

SDA0;                //發(fā)送起始信號
delay_us(5);          // 起始條件鎖定時間大于4μs

SCL0;                //鉗住I2C總線，準(zhǔn)備發(fā)送或接收數(shù)據(jù)
// delay_us(2);
}

void iic_stop()//總線結(jié)束

{
SDA_DIR_OUT;
SCL_DIR_OUT;
SDA0;                //發(fā)送結(jié)束條件的數(shù)據(jù)信號
delay_us(1);          //發(fā)送結(jié)束條件的時鐘信號
SCL1;                //結(jié)束條件建立時間大于4us
delay_us(5);

SDA1;                //發(fā)送I2C總線結(jié)束信號
delay_us(1);
}

void write_8bit(uchar c)
{
uchar BitCnt;
SDA_DIR_OUT;
SCL_DIR_OUT;
for(BitCnt=0;BitCnt<8;BitCnt++)       //要傳送的數(shù)據(jù)長度為8位
{
      if(c&0x80)
         SDA1;                         //判斷發(fā)送位
      else
         SDA0;
      delay_us(1);
      SCL1;
      delay_us(5);
      c=c<<1;
      SCL0;                         //置時鐘線為高，通知被控器開始接收數(shù)據(jù)位
      delay_us(1);
}
}
uchar read_8bit()//讀取8bit數(shù)據(jù)
{
SCL_DIR_OUT;
SDA_DIR_IN;
  uchar i,dat=0;
for(i=0;i<8;i++)
  { SCL1;
dat<<=1;
   if(SDA_IN==0x40)
dat|=0x01;
delay_us(5);
SCL0;
}
  return(dat);
}

void send_ack()//發(fā)送認(rèn)可位，用于讀取數(shù)據(jù)的認(rèn)可
{  SDA_DIR_OUT;
SCL_DIR_OUT;
SDA0;
delay_us(1);
SCL1;
   delay_us(5);
SCL0;
}

void send_noack()
{
  SDA_DIR_OUT;
  SCL_DIR_OUT;
  SDA1;
  delay_us(1);
SCL1;
  delay_us(5);
SDA0;
SCL0;
}

uchar check_ack()//檢測確認(rèn)位，如果返回值是0表示數(shù)據(jù)傳輸成功
{  uchar ack_bit;
  SDA_DIR_OUT;
  SCL_DIR_OUT;
SDA1;
  delay_us(1);
  SCL1;
  delay_us(5);
  SDA_DIR_IN;
  ack_bit=SDA_IN;
SCL0;
return(ack_bit);

}

void get_frequency()
{  ulong y;
y=PLL;
   hisi=fm_write[2]&0x10;
if(hisi)
freq=(y*8192+225000)/10000;
else
freq=(y*8192-225000)/10000 ;

}

void get_pll()
{ ulong freq1,y=frequency;
  freq1=y*10000;
hisi=fm_write[2]&0x10;
if(hisi)
PLL=((freq1+225000)*4)/32768;
else
PLL=((freq1-225000)*4)/32768;

}

void read_5byte()
{uchar i,tempH,tempL;
  iic_start();
write_8bit(read_order);
  check_ack();
for(i=0;i<5;i++)
   {fm_read[i]=read_8bit();
send_ack();
   }
send_noack();
iic_stop();
tempH=fm_read[0];
tempL=fm_read[1];
tempH&=0x3f;
PLL=tempH*256+tempL;
get_frequency();

}



void write_5byte()
{uchar i;
iic_start();
write_8bit(write_order);
check_ack();
for(i=0;i<5;i++)
{write_8bit(fm_write[i]);
   check_ack();
}
  iic_stop();
}

void refurbish_5767()//FM收音芯片數(shù)據(jù)刷新一次
{
get_pll();//計算PLL,
fm_write[0]=PLL/256;
fm_write[1]=PLL%256;
fm_write[2]=0x31;
fm_write[3]=0x11;
fm_write[4]=0x00;
if(mode)fm_write[2]|=0x80;//給SUD=1，向上搜索模式
else fm_write[2]&=0x7f;//給SUD=0，向下搜索模式
write_5byte();
read_5byte();

}

//config.h

#include "io430.h"
#define CPU_F ((double)12000000) //外部高頻晶振8MHZ
//#define CPU_F ((double)32768) //外部低頻晶振32.768KHZ
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))

#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define SDA_DIR_OUT P1DIR|=BIT6
#define SDA_DIR_IN P1DIR&=~BIT6
#define SCL_DIR_OUT P1DIR|=BIT7

#define SDA_IN P1IN&BIT6

#define SDA1 P1OUT|=BIT6
#define SDA0 P1OUT&=~BIT6
#define SCL1 P1OUT|=BIT7
#define SCL0 P1OUT&=~BIT7

#define max_freq 12800
#define min_freq 7600
#define write_order 0xc0
#define read_order 0xc1

#define keycode P1IN&0x03

//key.h
#include "io430.h"
uchar key_value;
uchar key_code;
void key_init()
{
  P1IE |= BIT0+BIT1+BIT2;             // P2.0-P2.2 IO口中斷使能
  P1IES |= 0x07;                      // P2.0-P2.2 IO口邊沿觸發(fā)中斷方式設(shè)置
  P1IFG &= ~(BIT0+BIT1+BIT2);          // P2.0-P2.2 IO口中斷標(biāo)志位清除

}

void key_set()
{
  if(key_value!=0)
   {
switch(key_value)
  {
  case 0x01:
switch(mode)
{
case 0:mode=1;break;
case 1:mode=0;break;
default:mode=0;break;
}
break;
  case 0x02:
switch(mode)
{
case 0:++frequency;break;
case 1:--frequency;break;
default:break;
}
break;

case 0x03:
switch(mode)
{
case 0:frequency+=10;break;
case 1:frequency-=10;break;
default:break;
}
break;
  default:break;
  }

if(frequency>max_freq)
frequency=min_freq;
if(frequency<min_freq)
frequency=max_freq;
key_code=3*mode+key_value;
key_value=0;
   }

}

#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
switch (P1IFG&0x07)
  {
case 0x01: key_value=0x01;
            break;
case 0x02: key_value=0x02;
            break;
  case 0x04:  key_value=0x03;
            break;
  default:  P1IFG = 0;  key_value=0;          // P2.0-P2.2 IO口中斷標(biāo)志位清除
            break;
  }
  P1IFG = 0;          // P2.0-P2.2 IO口中斷標(biāo)志位清除
}

//ta.h
#include"config.h"
uint t;
uchar set_hex;
extern void display();
void init_TA()
{
  TACCTL0 = CCIE;                         // TACCR0 interrupt enabled
  TACCR0 = 60000;                         //5ms中斷一次
  TACTL = TASSEL_2 + MC_1;                // SMCLK, upmode
}

void display()
{
  P1OUT|=BIT3;
  P2OUT=0X00;
switch(set_hex)
{
case 0:set_hex=1;P2OUT|=BIT0;P2OUT|=key_code<<2;break;
case 1:set_hex=0;P2OUT|=BIT1;P2OUT|=mode<<2;break;
default:break;
}
P1OUT&=-BIT3;

}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{


display();
  if(++t==50)
  {
t=0;
refurbish_5767();//FM收音芯片數(shù)據(jù)刷新一次

  }
}

//main.c
#include"iic.h"
#include"key.h"
#include"config.h"
#include"ta.h"
#include"shumaguan.h"
int main( void )
{
  extern_16m();
  key_init();
  init_TA();
  shumaguan_init();
  __bis_SR_register(GIE);
  while(1)
  {

key_set();
  }
}

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