msp430工作笔记3

0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,

0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,

0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,

0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,

0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,

0xe8,0xe6,0xe4,0xe3,0xe1,0xde,0xdc,0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,

0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,

0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,

0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e,0x3b,0x39,

0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,

0x12,0x10,0xf,0xd,0xc,0xb,0x9,0x8,0x7,0x6,0x5,0x4,0x3,0x3,0x2,0x1,0x1,0x0,0x0,0x0,0x0,

0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,

0xe,0x10,0x12,0x13,0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,

0x30,0x33,0x35,0x38,0x3b,0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57,0x5a,0x5d,

0x60,0x63,0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c};

void IO_interrupt_init()//IO中断初始化函数

{

P2REN |= BIT0+BIT1+BIT2+BIT5;// pullup 内部上拉电阻使能

//使用中断时，使能内部的上拉电阻这样当该脚悬空是，电平不会跳变，防止悬空时电平跳变不停的触发中断

P2OUT = BIT0+BIT1+BIT2+BIT5;// 当引脚上的上拉或下拉电阻使能时，PxOUT选择是上拉还是下来

//0：下拉，1：上拉

P2IE |= BIT0+BIT1+BIT2+BIT5;// interrupt enabled P13中断使能

P2IES |= BIT0+BIT1+BIT2+BIT5;// Hi/lo edge下降沿中断

//P1IES &= ~BIT3;//上升沿触发中断

P2IFG &= ~(BIT0+BIT1+BIT2+BIT5);//中断标志位清零

}

void write_dac(uchar data)//dac写数据函数

{

CS_CLR;

DI = data;

WR_CLR;

delay_us(1);

WR_SET;//latch data

CS_SET;

}

void saw()//锯齿波产生函数

{

uchar i=0;

for(i=0;i<255;i++)//0~255

{

write_dac(i);

}

}

void triangular()//产生三角波的函数

{

uchar i=0;

for(i=0;i<255;i++)

{

write_dac(i);

}

for(i=255;i>0;i--)

{

write_dac(i);

}

}

void square()//产生方波函数

{

write_dac(0xff);

delay_us(500);

write_dac(0x00);

delay_us(500);

}

void sin()//正弦波发生函数

{

uchar i;

for(i=0;i<255;i++)

{

write_dac(sin_a[i]);

}

}

void step()//阶梯波发生函数

{

write_dac(0xff);

delay_us(500);

write_dac(0xc0);

delay_us(500);

write_dac(0x7f);

delay_us(500);

write_dac(0x3f);

delay_us(500);

write_dac(0x00);

delay_us(500);

}

void main(void)

{

WDTCTL = WDTPW + WDTHOLD;// Stop WDT

uchar s1[] ={"wave_shaper "};

uchar s2[] ={"13_sin 14_square"};

uchar s3[] ={"15_tri 16_saw"};

uchar s4[] ={"key:"};

BCSCTL1 = CALBC1_12MHZ;//设定CPU时钟DCO频率为12MHz

DCOCTL = CALDCO_12MHZ;

P2DIR |=BIT3+BIT4;//液晶的两条线

P1DIR = 0xff;//0832的数据位

P2DIR |= BIT6+BIT7;//把P26和P27配置为普通IO 并为输出脚默认为晶振的输入和输出引脚 作为dac0832的

P2SEL &= ~(BIT6+BIT7);//cs和wr控制端

P2SEL2 &= ~(BIT6+BIT7);

init_lcd();//初始化LCD

IO_interrupt_init();

wr_string(0,0,s1);//第一行第一个位置显示s1

wr_string(0,1,s2);//第二行第一个位置显示s2

wr_string(0,2,s3);//第三行第一个位置显示s3

wr_string(0,3,s4);//第四行第一个位置显示s4

wr_int(2,3,key);//显示按键按下次数

wr_string(5,3,s_step);

_EINT();//enable interrupt

for(;;)

{

if(key==13)

{

sin();

}

else if(key==14)

{

square();

}

else if(key==15)

{

triangular();

}

else if(key==16)

{

saw();

}

else

{

step();

}

}

//_BIS_SR(LPM4_bits + GIE);// Enter LPM4 w/interrupt 进入低功耗模式4

}

// Port 2 interrupt service routine

#pragma vector=PORT2_VECTOR

__interrupt void Port_1(void)

{

_DINT();//关中断

P2DIR &= ~(BIT0+BIT1+BIT2+BIT5); //在中断设为输入，用于消抖因为IO脚默认为输入，所以这句话不要也行，但是

//最好加上使程序清晰

delay_ms(5);//延迟5ms，消抖延迟5ms 10ms都行

if((P2IN&BIT0)==0)//如果为低，即按键真的按下了因为是下降沿触发中断，所以要检测是否为低

{

key=13;

wr_string(5,3,s_sin);