//MSP430高级实验开发组件 - ZLG7289键盘显示组件示例程序
//时钟设置:
////ACLK=N/A,MCLK=SMCLK=default(DCO~800k)
//硬件连接:
////     MSP430 Broad               ZLG7289 Broad
////   ------------------         ------------------
////   |      VCC       | ------> |      VCC       |
////   |      P65       | ------> |      CS        |
////   |      P64       | ------> |      CLK       |
////   |      P63       | |    DAT         |
////   |      P24       | ////   |      GND       | ------> |      GND       |
////   ------------------         ------------------
//当前演示程序功能描述:
////当有按键按下时,430进入中断读取键值,显示在LED数码管上
/*********************************************************/

#include

#define Z7289_CS  BIT5
#define Z7289_CLK  BIT4
#define Z7289_DAT  BIT3
#define Z7289_KEY  BIT4

#define Z7289_DIR  P6DIR
#define Z7289_OUT  P6OUT
#define Z7289_IN  P6IN
#define Z7279_INT_DIR  P2DIR
#define Z7279_INT_IE  P2IE
#define Z7279_INT_IES  P2IES
#define Z7279_INT_IFG  P2IFG   //定义MSP430端口

#define Z7289_CS_LO  Z7289_OUT &= ~Z7289_CS
#define Z7289_CS_HI  Z7289_OUT |= Z7289_CS
#define Z7289_CLK_LO         Z7289_OUT &= ~Z7289_CLK
#define Z7289_CLK_HI  Z7289_OUT |= Z7289_CLK
#define Z7289_DAT_LO         Z7289_OUT &= ~Z7289_DAT
#define Z7289_DAT_HI  Z7289_OUT |= Z7289_DAT

#define Z7289_RESET  Z7289_Send1(0xA4)
#define Z7289_TEST  Z7289_Send1(0xBF)
#define Z7289_LMOV  Z7289_Send1(0xA1)
#define Z7289_RMOV  Z7289_Send1(0xA0)
#define Z7289_RLMOV  Z7289_Send1(0xA3)
#define Z7289_RRMOV  Z7289_Send1(0xA2) //定义ZLG7289功能

const unsigned char DelayConst = 0;   //系统延时
const unsigned char Code[3]={    //显示方式
 0x80,0xC8,0x90
};
const unsigned char Keys[16]={    //按键编码
 0x01,0x18,0x19,0x1A,0x10,0x11,0x12,0x08,0x09,0x0A,0x1B,0x13,0x0B,0x03,0x00,0x02

};

void Z7289_Delayt(unsigned int dtime);
void Z7289_Send1(unsigned char dat);
void Z7289_Send2(unsigned char add,unsigned char dat);
void Z7289_Show(unsigned char add,unsigned char coding,unsigned char d);
void Z7289_Init(void);
void Z7279_Init(void);
void OSC_Init(void);
unsigned char Z7289_ReadKey(void);
unsigned char readkey;
int j=8;
unsigned char key_array[8];
void main(void) {
    WDTCTL = WDTPW + WDTHOLD;                       //停止系统软件看门狗
    OSC_Init();
    Z7289_Init();
    Z7279_Init();
    _BIS_SR(GIE);
}

//中断服务程序
////读取键值并显示
#pragma vector=PORT2_VECTOR
__interrupt void PORT2_ISR (void) {
    readkey = Z7289_ReadKey();
    key_array[j] = readkey;
    Z7289_Show(j,1,readkey);  
 Z7279_INT_IFG = 0;
     j--;
  if(j<0)
   j=8;
}
//
void OSC_Init(void){
    BCSCTL1 &= ~XT2OFF;                                       //XT2 = HF-XTAL
    do {
        IFG1 &= ~OFIFG;                                           //清除OSCFault标志位
        for (int i=0xFF;i>0;i--);                                         //延时等待晶振
    } while ((IFG1 & OFIFG));                                    //OSCFault标志位始终有效
     BCSCTL2 |= SELM_2;                                        //MCLK = XT2
}
//初始化程序
////设定端口和中断,初始化ZLG7289
void Z7289_Init(void) {
 Z7289_DIR |= (Z7289_CS + Z7289_CLK + Z7289_DAT);
 Z7289_CS_HI;
 Z7289_CLK_LO;
 Z7289_RESET;
}
//初始化7279
void Z7279_Init(void){
    Z7279_INT_DIR &= ~Z7289_KEY;
 Z7279_INT_IE  |= Z7289_KEY;
 Z7279_INT_IES |= Z7289_KEY;
}
//向ZLG7289发送一个字节(命令)
void Z7289_Send1(unsigned char dat) {
 unsigned char itemp;
 Z7289_CS_LO;
 Z7289_Delayt(1);
 for(itemp=0;itemp<8;itemp++) {
  if((dat<    Z7289_DAT_HI;
  else
   Z7289_DAT_LO;
  Z7289_Delayt(1);
  Z7289_CLK_HI;
  Z7289_Delayt(1);
  Z7289_CLK_LO;
 }
 Z7289_CS_HI;
}

//向ZLG7289发送两个字节(命令+数据)
void Z7289_Send2(unsigned char add,unsigned char dat) {
 unsigned char itemp;
 Z7289_CS_LO;
 Z7289_Delayt(1);
 for(itemp=0;itemp<8;itemp++) {
  if((add<    Z7289_DAT_HI;
  else
   Z7289_DAT_LO;
  Z7289_Delayt(1);
  Z7289_CLK_HI;
  Z7289_Delayt(1);
  Z7289_CLK_LO;
 }
 Z7289_Delayt(1);
 for(itemp=0;itemp<8;itemp++) {
  if((dat<    Z7289_DAT_HI;
  else
   Z7289_DAT_LO;
  Z7289_Delayt(1);
  Z7289_CLK_HI;
  Z7289_Delayt(1);
  Z7289_CLK_LO;
 }  
 Z7289_CS_HI;
}

//按照编码方式显示字符
void Z7289_Show(unsigned char add,unsigned char coding,unsigned char d) {
 Z7289_Send2(Code[coding]+add,d);
}

//向ZLG7289发送命令后,读取按键键值,并查表返回结果
unsigned char Z7289_ReadKey(void) {
 unsigned char itemp;
 unsigned char dat;
 dat = 0x15;
 Z7289_CS_LO;
 Z7289_Delayt(1);
 for(itemp=0;itemp<8;itemp++) {//向7289发送命令
  if((dat<    Z7289_DAT_HI;
  else
   Z7289_DAT_LO;
  Z7289_Delayt(1);
  Z7289_CLK_HI;
  Z7289_Delayt(1);
  Z7289_CLK_LO;
 }
 Z7289_DIR &= ~Z7289_DAT;
 Z7289_Delayt(1);
 for(itemp=0;itemp<8;itemp++) {//根据输入口的电平高低来确定dat的值
  Z7289_CLK_HI;
  Z7289_Delayt(1);
  Z7289_CLK_LO;
  dat<<=1;
  if((Z7289_IN&Z7289_DAT) == Z7289_DAT)
   dat |= BIT0;
  else
   dat &= ~BIT0;
 }
 Z7289_DIR |= Z7289_DAT;
 Z7289_CS_HI;
 for(itemp=0;itemp<16;itemp++)
  if(dat==Keys[itemp])//查表返回键值,表可以从IAR中观察得到
   break;
 return itemp;
}

void Z7289_Delayt(unsigned int dtime) {
 unsigned int itemp,jtemp;
 for(itemp=0;itemp   for(jtemp=0;jtemp }