Ⅰ STM32单片机DA程序
//DAC通道输出初始化void Dac1_Init(void){ GPIO_InitTypeDef GPIO_InitStructure;DAC_InitTypeDef DAC_InitType;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE ); //使能PORTA通道时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE ); //使能DAC通道时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; // 端口配置 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_SetBits(GPIOA,GPIO_Pin_4);//PA.4 输出高DAC_InitType.DAC_Trigger=DAC_Trigger_None;//不使用触发功能 TEN1=0DAC_InitType.DAC_WaveGeneration=DAC_WaveGeneration_None;//不使用波形发生DAC_InitType.DAC_LFSRUnmask_TriangleAmplitude=DAC_LFSRUnmask_Bit0;//屏蔽、幅值设置DAC_InitType.DAC_OutputBuffer=DAC_OutputBuffer_Disable ;//DAC1输出缓存关闭 BOFF1=1 DAC_Init(DAC_Channel_1,&DAC_InitType); //初始化DAC通道1DAC_Cmd(DAC_Channel_1, ENABLE); //使能DAC1 DAC_SetChannel1Data(DAC_Align_12b_R, 0); //12位右对齐数据格式设置DAC值}//设置通道1输出电压//vol:0~3300,代表0~3.3Vvoid Dac1_Set_Vol(u16 vol){float temp=vol;temp/=1000;temp=temp*4096/3.3;DAC_SetChannel1Data(DAC_Align_12b_R,temp);//12位右对齐数据格式设置DAC值}
