[Cortex-M0技术交流] [2012助学第一期]hzy41y学习笔记之二（用HC595和LS164驱动7位LED）

//基于NUC120学习套件用HC595和LS164驱动7位数码管

//作者：hzy41y

//最后更新日期2012年06月13日11:06

#include <stdio.h> 

#include <string.h> 

#include "NUC1xx.h"

#include "Driver\DrvSYS.h"

#include "Driver\DrvGPIO.h"

#include "DrvTimer.h"

#include "hzy.h"

#define SCL595_set DrvGPIO_SetBit(E_GPC,14)

#define SCL164_set DrvGPIO_SetBit(E_GPC,15)

#define SDA_set DrvGPIO_SetBit(E_GPC,6)

#define SCL595_clr DrvGPIO_ClrBit(E_GPC,14)

#define SCL164_clr DrvGPIO_ClrBit(E_GPC,15)

#define SDA_clr DrvGPIO_ClrBit(E_GPC,6)



uint16_t timer; //全局时间延时变量 



uint8_t tabl[] = {0xfa,0x60,0xdc,0xec,0x66,0xae,0xbe,0xe0,0xfe,0xee,0x08,0x10,0x04};

/* 0 1 2 3 4 5 6 7 8 9

display[0]对应LED左边第一位,display[6]对应LED最后第七位;

display[7]为闪烁使能,最高位对应LED左边第一位,那位为0则闪烁 */ 

uint8_t display[8]; //LED显示缓存



//***定时器回调函数*************//

void Timer0_Callback(void) // Timer0 interrupt subroutine 

{ static uint16_t S_counter; //各位闪烁计数器

static uint8_t S_Enable; //各位闪烁使能

static uint8_t ch; //1-7显示通道变量

static hzy_b bit;

uint8_t j;

uint8_t display1; 



if(bit.bg)

bit.bn=S_Enable>>7;

else bit.bn=1; //判Led相对位要闪烁

S_Enable<<=1; //判Led相对位不闪烁

display1=display[ch]; 

for(j=8;j>0;j--)

{ if(bit.bn)

{ if(display1>>7)SDA_set;

else SDA_clr;

display1<<=1;

}else SDA_clr; //判Led相对位要闪烁595各段输出为低电平



SCL595_set; 

SCL595_clr; // 595--11pin

}

if(ch==0)SDA_clr; 

else SDA_set; // 595--14pin和164--1pin/2pin

SCL164_set;

SCL164_clr; // 595--12pin/13pin 和164--8pin

ch++; //显示通道加1

if(ch==8)

{ SCL164_set;SCL164_clr;ch=0;

S_Enable=display[7];

}

S_counter++;

if(S_counter==500)

{ bit.bg=!bit.bg;

S_counter=0;

}

timer++; //全局时间延时变量 

TIMER0->TISR.TIF =1; 

}





//---------TIMER0初始化-----------------------------//

void InitTIMER0(void)

{

//第1步。启用和选择时钟源 / 

SYSCLK->CLKSEL1.TMR0_S = 0; // Timer0的时钟源选择12MHZ 

SYSCLK->APBCLK.TMR0_EN =1; //使能定时器时钟源



//第2步。选择操作模式//

TIMER0->TCSR.MODE=1; //选择定期模式，运作模



/*第3步。选择了时间周期=（周期定时器时钟输入）*（8位预分频+1）*（24位TCMP)

Step 3. Select Time out period = (Period of timer clock input) * (8-bit Prescale + 1) * (24-bit TCMP)*/

TIMER0->TCSR.PRESCALE=255; // Set Prescale [0~255]

TIMER0->TCMPR = 100; // Set TCMPR [0~16777215]

// (1/12000000)*(255+1)*(2765)= 



/* Step 4. Enable interrupt */

TIMER0->TCSR.IE = 1;

TIMER0->TISR.TIF = 1; //Write 1 to clear for safty 

NVIC_EnableIRQ(TMR0_IRQn); //Enable Timer0 Interrupt



/* Step 5. Enable Timer module */



DrvTIMER_SetTimerEvent(E_TMR0,1,(TIMER_CALLBACK) Timer0_Callback,0);

TIMER0->TCSR.CRST = 1; //Reset up counter

TIMER0->TCSR.CEN = 1; //Enable Timer0



// TIMER0->TCSR.TDR_EN=1; // Enable TDR function

}





//***************IO和显示初始化*****************************//

void init()

{ uint8_t i;



DrvGPIO_Open( E_GPA, 2, E_IO_OUTPUT );

DrvGPIO_Open( E_GPC, 6, E_IO_QUASI ); //标准数字双向口

DrvGPIO_Open( E_GPC, 14, E_IO_QUASI );

DrvGPIO_Open( E_GPC, 15, E_IO_QUASI );



for(i=0;i<7;i++)

{ display[i]=tabl[8];}

display[7]=0x00; //设置闪烁位

InitTIMER0();

timer=0;

while (timer<5000);

for(i=0;i<7;i++)

{ display[i]=tabl[i];}

display[7]=0xFF; //设置闪烁位

timer=0;

while (timer<5000);

}



/*----------------------------------------------------------------------------

MAIN function

----------------------------------------------------------------------------*/

int32_t main (void)

{

UNLOCKREG();

SYSCLK->PWRCON.XTL12M_EN = 1;

LOCKREG();

init(); 

while(1);



}