- /***************************************************
- 最后再附上一个最近做的数控直流电源的源代码，希望大家能一起互相学习:)
- ***************************************************/
- #include <msp430g2452.h>
- /********************************************
- * TLC5615:
- DIN:P1.1 SCLK:P1.2 CS:P1.0
- 74LS48
- A:P1.4 B:P1.5 C:P1.6 D:P1.7
- 74LS138
- A:P2.0 B:P2.1 C:P2.6
- 按键：
- key1:P2.2 key2:P2.3 key3:P2.4 key4:P2.5
- *********************************************/
-
- int b[4];
- int *pb = &b[0];
- int dat = 0;
- int time = 0;
- int Buff = 0;
-
- //DIN:P1.1 SCLK:P1.2 CS:P1.0
- #define DIN_SET BIT1
- #define DIN_CLC ~BIT1
- #define SCLK_SET BIT2
- #define SCLK_CLC ~BIT2
- #define CS_SET BIT0
- #define CS_CLC ~BIT0
-
- void delay_ms(int tt)
- {
- for(tt*=500;tt>0;tt--)
- {
- _nop();
- }
- }
-
- /*******************************
- * 函数名：Clock_Init
- * 功能：初始化时钟
- * 参数：无
- ******************************/
- void Clock_Init(void)
- {
- DCOCTL |= CALDCO_1MHZ;
- BCSCTL1 |= CALBC1_1MHZ; //初始化DCO时钟频率为 1MHz
- }
-
- /*******************************
- * 函数名：IO_Init
- * 功能：初始化IO口
- * 参数：无
- ******************************/
- void IO_Init(void)
- {
- P1DIR |= 0xFFF7; //P1口所有管脚设为输出模式(除了P1.3,因为P1.3外接了上拉电阻作为S2)
- P1OUT &= 0x0000; //复位IO端口
- P2SEL &= ~BIT6; //将P2.6设置为通用IO输入
- P2DIR |= BIT0 + BIT1 +BIT6; //P2口 0,1,6设为输出模式
- P2OUT &= 0x0000; //复位IO端口
- P2DIR &= 0x00C3; //P2口2,3,4,5设置为输入模式
- P2REN |= BIT2 + BIT3 + BIT4 + BIT5; //设置为上拉输入模式
- P2OUT |= BIT2 + BIT3 + BIT4 + BIT5;
- }
-
- /*******************************
- * 函数名：Key_Scan
- * 功能：按键扫描
- * 参数：无
- * 返回值：z
- * z=1:P2.2被按下 “+”
- * z=2:P2.3被按下 “-”
- * z=3:P2.4被按下 “操作位选择”
- * z=4:P2.5被按下 “确认”
- ******************************/
- int Key_Scan(void)
- {
- int z = 0;
- if(!(P2IN&BIT2)) //P2.2被按下
- {
- delay_ms(5); //延时消抖
- if(!(P2IN&BIT2))//确实被按下
- {
- while(!(P2IN&BIT2)); //松手检测
- z = 1;
- }
- }
- if(!(P2IN&BIT3)) //P2.3被按下
- {
- delay_ms(5); //延时消抖
- if(!(P2IN&BIT3))//确实被按下
- {
- while(!(P2IN&BIT3)); //松手检测
- z = 2;
- }
- }
- if(!(P2IN&BIT4)) //P2.4被按下
- {
- delay_ms(5); //延时消抖
- if(!(P2IN&BIT4))//确实被按下
- {
- while(!(P2IN&BIT4)); //松手检测
- z = 3;
- }
- }
- if(!(P2IN&BIT5)) //P2.5被按下
- {
- delay_ms(5); //延时消抖
- if(!(P2IN&BIT5))//确实被按下
- {
- while(!(P2IN&BIT5)); //松手检测
- z = 4;
- }
- }
- return z;
- }
-
- /**********************************
- * 函数名：Flicker
- * 功能：当设置时闪烁选中位
- * 参数：*pointer:指向所选中位
- * array[]:数据参数
- * 返回值：无
- **********************************/
- //P2.6为C 闪烁控制位
- void Flicker(int *pointer,int array[])
- {
- int i;
- int tmp = 0;
- for(i = 0;i<4;i++)
- {
- if(pointer == &array[0]) //第一位闪烁
- {
- if(tmp == 0)
- {
- if(time<15)
- {
- P2OUT |= BIT6;
- time++;
- }
- else
- {
- if(time<30)
- {
- P2OUT &= ~BIT6;
- time++;
- }
- else time = 0;
- }
- }
- else
- {
- P2OUT &= ~BIT6; //若不是闪烁位 则拉低138 C 是数码管段选选通
- }
- if(tmp%2) //控制段选输出
- {
- P2OUT |= BIT0; //138 A
- }
- else
- {
- P2OUT &= ~BIT0;
- }
- if(tmp/2)
- {
- P2OUT |= BIT1; //138 B
- }
- else
- {
- P2OUT &= ~BIT1;
- }
- tmp++;
- if(tmp>3)tmp = 0;
- }
-
- else if(pointer == &array[1])
- {
- if(tmp == 1)
- {
- if(time<15)
- {
- P2OUT |= BIT6;
- time++;
- }
- else
- {
- if(time<30)
- {
- P2OUT &= ~BIT6;
- time++;
- }
- else time = 0;
- }
- }
- else
- {
- P2OUT &= ~BIT6;
- }
- if(tmp%2)
- {
- P2OUT |= BIT0;
- }
- else
- {
- P2OUT &= ~BIT0;
- }
- if(tmp/2)
- {
- P2OUT |= BIT1;
- }
- else
- {
- P2OUT &= ~BIT1;
- }
- tmp++;
- if(tmp>3)tmp = 0;
- }
-
- else if(pointer == &array[2])
- {
- if(tmp == 2)
- {
- if(time<15)
- {
- P2OUT |= BIT6;
- time++;
- }
- else
- {
- if(time<30)
- {
- P2OUT &= ~BIT6;
- time++;
- }
- else time = 0;
- }
- }
- else
- {
- P2OUT &= ~BIT6;
- }
- if(tmp%2)
- {
- P2OUT |= BIT0;
- }
- else
- {
- P2OUT &= ~BIT0;
- }
- if(tmp/2)
- {
- P2OUT |= BIT1;
- }
- else
- {
- P2OUT &= ~BIT1;
- }
- tmp++;
- if(tmp>3)tmp = 0;
- }
-
- else if(pointer == &array[3])
- {
- if(tmp == 3)
- {
- if(time<15)
- {
- P2OUT |= BIT6;
- time++;
- }
- else
- {
- if(time<30)
- {
- P2OUT &= ~BIT6;
- time++;
- }
- else time = 0;
- }
- }
- else
- {
- P2OUT &= ~BIT6;
- }
- if(tmp%2) //控制数码管段选,闪烁
- {
- P2OUT |= BIT0;
- }
- else
- {
- P2OUT &= ~BIT0;
- }
- if(tmp/2)
- {
- P2OUT |= BIT1;
- }
- else
- {
- P2OUT &= ~BIT1;
- }
- tmp++;
- if(tmp>3)tmp = 0;
- }
-
- if(b[i]&BIT3) //将array[i]转化为二进制输出,经BCD译码，送数码管显示
- {
- P1OUT |= BIT7;
- }
- else
- {
- P1OUT &= ~BIT7;
- }
- if(b[i]&BIT2)
- {
- P1OUT |= BIT6;
- }
- else
- {
- P1OUT &= ~BIT6;
- }
- if(b[i]&BIT1)
- {
- P1OUT |= BIT5;
- }
- else
- {
- P1OUT &= ~BIT5;
- }
- if(b[i]&BIT0)
- {
- P1OUT |= BIT4;
- }
- else
- {
- P1OUT &= ~BIT4;
- }
- delay_ms(1);
- }
- }
-
- /**************************************
- * 函数名:Set
- * 功能:根据按键的值来执行相应的设置
- * 参数: keynum:按键的返回值
- * 返回值:返回电压值 供DIsp函数显示
- ***************************************/
- int Set(int keynum)
- {
- b[0] = dat/1000;
- b[1] = dat%1000/100;
- b[2] = dat%100/10;
- b[3] = dat%10;
- if(keynum) //有键按下
- {
- unsigned char flag = 1;
- while(flag)
- {
- switch(keynum)
- {
- case 1:
- {
- (*pb)++;
- if(*pb>9)*pb = 0;
- }break;
- case 2:
- {
- (*pb)--;
- if(*pb<0)*pb = 9;
- }break;
- case 3:
- {
- pb++;
- if(pb>&b[3])pb = &b[0];
- }break;
- case 4:
- {
- flag = 0; //若按下确认键 跳出循环
- }break;
- default:
- break;
- }
- keynum = 0;
- keynum = Key_Scan();
- Flicker(pb,b);
- }
- }
- dat = b[0]*1000+b[1]*100+b[2]*10+b[3];
- }
-
- /****************************************
- * 函数名：LED_Disp
- * 功能：显示设定输出电压值
- * 参数：dat:输入的电压设定参数
- * 若 dat = 512;表示设定输出为 5.12V
- * 返回值：
- * 将设定的温度换算成DA的数据，输入DA
- ****************************************/
- int LED_Disp(int dat)
- {
- int a[4],tmp = 0;
- int i;
- a[0] = dat/1000;
- a[1] = dat%1000/100;
- a[2] = dat%100/10;
- a[3] = dat%10;
-
- for(i = 0;i<4;i++)
- {
- if(tmp%2) //控制数码管段选
- {
- P2OUT |= BIT0;
- }
- else
- {
- P2OUT &= ~BIT0;
- }
- if(tmp/2)
- {
- P2OUT |= BIT1;
- }
- else
- {
- P2OUT &= ~BIT1;
- }
- tmp++;
- if(tmp>3)tmp = 0;
-
- if(a[i]&BIT3) //将a[i]转化为二进制输出,经BCD译码，送数码管显示
- {
- P1OUT |= BIT7;
- }
- else
- {
- P1OUT &= ~BIT7;
- }
- if(a[i]&BIT2)
- {
- P1OUT |= BIT6;
- }
- else
- {
- P1OUT &= ~BIT6;
- }
- if(a[i]&BIT1)
- {
- P1OUT |= BIT5;
- }
- else
- {
- P1OUT &= ~BIT5;
- }
- if(a[i]&BIT0)
- {
- P1OUT |= BIT4;
- }
- else
- {
- P1OUT &= ~BIT4;
- }
- delay_ms(2);
- }
- Buff = (float)dat/1000*1024; //将输入的数字温度值转化为送给DA的数据值
- if(Buff > 1023) Buff = 1023;
- return Buff;
- }
-
- /*******************************
- * 函数名：Send_Data
- * 功能：写入10位数据
- * 参数：dat:10位数据
- ******************************/
- void Send_Data(int dat)
- {
- int i,tmp = 0x0200;
- P1OUT &= CS_CLC; //使能
- for(i = 0;i<10;i++)
- {
- if(dat&tmp)
- {
- P1OUT |= DIN_SET;
- }
- else
- {
- P1OUT &= DIN_CLC;
- }
- tmp>>=1;
- P1OUT |= SCLK_SET; //将数据写入
- P1OUT &= SCLK_CLC;
- }
- P1OUT |= DIN_SET; //写入两个填充位
- P1OUT |= SCLK_SET;
- P1OUT &= SCLK_CLC;
- P1OUT |= DIN_SET;
- P1OUT |= SCLK_SET;
- P1OUT &= SCLK_CLC;
-
- P1OUT |= CS_SET; //挂起
- }
-
-
- void main(void)
- {
- int tmp = 0,D = 0;
- WDTCTL = WDTPW + WDTHOLD; //关闭看门狗
- Clock_Init();
- IO_Init();
- int i = 0;
- P2OUT &= ~BIT6;
-
- for(;;)
- {
- tmp = Set(Key_Scan());
- LED_Disp(tmp);
- Send_Data(LED_Disp(tmp));
- }
-
- }
-
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