stm32F401的HAL库adc转换采集温度初始化代码
时间: 2023-12-10 15:05:01 浏览: 79
STM32 HAL库 ADC数据采集
可以这样编写:
1. 首先要开启ADC时钟,例如:__HAL_RCC_ADC1_CLK_ENABLE();
2. 设置ADC单元,例如:ADC_HandleTypeDef hadc;
hadc.Instance = ADC1;
hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
hadc.Init.Resolution = ADC_RESOLUTION_12B;
hadc.Init.ScanConvMode = DISABLE;
hadc.Init.ContinuousConvMode = DISABLE;
hadc.Init.DiscontinuousConvMode = DISABLE;
hadc.Init.NbrOfDiscConversion = 0;
hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc.Init.NbrOfConversion = 1;
hadc.Init.DMAContinuousRequests = DISABLE;
hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
3. 初始化ADC,例如:HAL_ADC_Init(&hadc);
4. 配置转换通道,例如:ADC_ChannelConfTypeDef sConfig;
sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
HAL_ADC_ConfigChannel(&hadc, &sConfig);
5. 启动转换,例如:HAL_ADC_Start(&hadc);
6. 等待转换完成,例如:HAL_ADC_PollForConversion(&hadc, 10);
7. 获取转换结果,例如:uint32_t adc_value = HAL_ADC_GetValue(&hadc);
计算温度,例如:
float temp_value = (1.43 - ((float)adc_value / 4095 * 3.3)) / 0.0043 + 25;
(此代码是基于STM32F4的内部温度传感器计算温度,不同芯片的ADC温度计算方法可能不一样,请自行参考芯片数据手册)
希望可以帮到你!
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