有关原子教你玩STM32寄存器版本实验源码-DAC实验源程序。

int main(void)
{
u16 adcx;
float temp;
u8 t=0;
u16 dacval=0;
u8 key;
Stm32_Clock_Init(9); //系统时钟设置
uart_init(72,9600); //串口初始化为9600
delay_init(72); //延时初始化
LED_Init(); //初始化与LED连接的硬件接口
LCD_Init(); //初始化LCD
usmart_dev.init(72); //初始化USMART
KEY_Init(); //按键初始化
Adc_Init(); //ADC初始化
Dac1_Init(); //DAC通道1初始化
POINT_COLOR=RED;//设置字体为红色
LCD_ShowString(60,50,200,16,16,"WarShip STM32");
LCD_ShowString(60,70,200,16,16,"DAC TEST");
LCD_ShowString(60,90,200,16,16,"ATOM@ALIENTEK");
LCD_ShowString(60,110,200,16,16,"2012/9/8");
LCD_ShowString(60,130,200,16,16,"WK_UP:+ KEY1:-");
//显示提示信息
POINT_COLOR=BLUE;//设置字体为蓝色
LCD_ShowString(60,150,200,16,16,"DAC VAL:");
LCD_ShowString(60,170,200,16,16,"DAC VOL:0.000V");
LCD_ShowString(60,190,200,16,16,"ADC VOL:0.000V");
DAC->DHR12R1=dacval;//初始值为0
while(1)
{
t++;
key=KEY_Scan(0);
if(key==4)
{
if(dacval<4000)dacval+=200;
DAC->DHR12R1=dacval; //输出
}else if(key==2)
{
if(dacval>200)dacval-=200;
else dacval=0;
DAC->DHR12R1=dacval; //输出
}
if(t==10||key==2||key==4) //WKUP/KEY1按下了,或者定时时间到了
{
adcx=DAC->DHR12R1;
LCD_ShowxNum(124,150,adcx,4,16,0); //显示DAC寄存器值
temp=(float)adcx*(3.3/4096); //得到DAC电压值
adcx=temp;
LCD_ShowxNum(124,170,temp,1,16,0); //显示电压值整数部分
temp-=adcx;
temp*=1000;
LCD_ShowxNum(140,170,temp,3,16,0X80); //显示电压值的小数部分
adcx=Get_Adc_Average(ADC_CH1,10); //得到ADC转换值
temp=(float)adcx*(3.3/4096); //得到ADC电压值
adcx=temp;
LCD_ShowxNum(124,190,temp,1,16,0); //显示电压值整数部分
temp-=adcx;
temp*=1000;
LCD_ShowxNum(140,190,temp,3,16,0X80); //显示电压值的小数部分
LED0=!LED0;
t=0;
}
delay_ms(10);

}
}