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