71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#include "basic.h"
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/**
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* @brief 使能DAC的时钟，初始化GPIO
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* @param 无
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* @retval 无
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*/
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void DAC_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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DAC_InitTypeDef DAC_InitStructure;
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/* 使能GPIOA时钟 */
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
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/* 使能DAC时钟 */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
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/* DAC的GPIO配置，模拟输入 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* 配置DAC 通道1 */
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DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software; //使用软件触发
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DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; //不使用波形发生器
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DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; //使用DAC输出缓冲
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DAC_Init(DAC_Channel_1, &DAC_InitStructure);
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/* 配置DAC 通道2 */
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DAC_Init(DAC_Channel_2, &DAC_InitStructure);
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/* 配置DAC 通道1、2 */
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DAC_Cmd(DAC_Channel_1, ENABLE);
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DAC_Cmd(DAC_Channel_2, ENABLE);
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//初始值
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DAC_SetChannel1Data(DAC_Align_12b_R,0x0000);
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DAC_SetChannel2Data(DAC_Align_12b_R,0x0000);
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//软件触发
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DAC_SoftwareTriggerCmd(DAC_Channel_1,ENABLE);
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DAC_SoftwareTriggerCmd(DAC_Channel_2,ENABLE);
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}
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void DAC1_SetVol(float voltage)
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{
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uint16_t data;
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data = (uint16_t)((voltage / 3.0f) * 4095);
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DAC_SetChannel1Data(DAC_Align_12b_R,data);
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DAC_SoftwareTriggerCmd(DAC_Channel_1,ENABLE);
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}
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void DAC2_SetVol(float voltage)
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{
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uint16_t data;
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data = (uint16_t)((voltage / 3.0f) * 4095);
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DAC_SetChannel2Data(DAC_Align_12b_R,data);
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DAC_SoftwareTriggerCmd(DAC_Channel_2,ENABLE);
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}
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