stm32 DAC产生可调电压0到3V源码亲测可用 -

#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "usart.h"
#include "dac.h"
#include "adc.h"
#include "usmart.h"
/************************************************
ALIENTEK战舰STM32开发板实验20
DAC 实验
************************************************/
int main(void)
{
u16 adcx;
float temp;
u8 t=0;
u16 dacval=1800;
u8 key;
delay_init(); //延时函数初始化
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置中断优先级分组为组2：2位抢占优先级，2位响应优先级
uart_init(115200); //串口初始化为115200
KEY_Init(); //初始化按键程序
LED_Init(); //LED端口初始化
LCD_Init(); //LCD初始化
//usmart_dev.init(72); //初始化USMART
Adc_Init(); //ADC初始化
Dac1_Init(); //DAC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,"2015/1/15");
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_SetChannel1Data(DAC_Align_12b_R, 0);//初始值为0
while(1)
{
t++;
key=KEY_Scan(0);
if(key==WKUP_PRES)
{
if(dacval<4000)dacval+=50;
DAC_SetChannel1Data(DAC_Align_12b_R, dacval);//设置DAC值
}else if(key==KEY1_PRES)
{
if(dacval>200)dacval-=50;
else dacval=0;
DAC_SetChannel1Data(DAC_Align_12b_R, dacval);//设置DAC值
}
if(t==10||key==KEY1_PRES||key==WKUP_PRES) //WKUP/KEY1按下了,或者定时时间到了
{
adcx=DAC_GetDataOutputValue(DAC_Channel_1);//读取前面设置DAC的值
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_Channel_1,10); //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);
}
}

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