while(ADC_GetResetCalibrationStatus(ADC1)); ADC_StartCalibration(ADC1); //Start Calibration register while(ADC_GetCalibrationStatus(ADC1));//waiting for finishing the calibration ADC_ExternalTrigConvCmd(ADC1, ENABLE);
时间: 2024-04-18 09:31:08 浏览: 467
这段代码片段涉及到 ADC1 的校准和外部触发转换的配置。
第一行代码 `while(ADC_GetResetCalibrationStatus(ADC1));` 是用来等待 ADC1 的复位校准完成。复位校准是在启动 ADC 之前进行的一个必要步骤,以确保 ADC 的正常工作。
第二行代码 `ADC_StartCalibration(ADC1);` 是用来启动 ADC1 的校准过程。在进行转换之前,需要对 ADC 进行校准以提高测量的准确性。
第三行代码 `while(ADC_GetCalibrationStatus(ADC1));` 是用来等待 ADC1 的校准过程完成。在进行其他操作之前,需要确保校准过程已经完成。
第四行代码 `ADC_ExternalTrigConvCmd(ADC1, ENABLE);` 是用来启用 ADC1 的外部触发转换功能。通过启用外部触发转换,可以使用外部信号触发 ADC 的转换操作,而不是使用软件触发。
请注意,在编写代码时,需要根据您的具体硬件和需求进行适当的修改和配置。
相关问题
stm32adc采集dac的数据_STM32实例DAC数模转换实验
好的,以下是一个简单的STM32实例DAC数模转换实验,采用ADC采集DAC输出的数据。
首先,我们需要初始化DAC和ADC,以及配置ADC的DMA传输。
```c
#include "stm32f4xx.h"
#define ADC_DR_ADDRESS ((uint32_t)0x4001204C)
void DAC_ADC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DAC_InitTypeDef DAC_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIOA clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
/* Configure PA4 (DAC1) in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable DAC clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
/* Configure DAC */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
/* Enable DAC Channel1 */
DAC_Cmd(DAC_Channel_1, ENABLE);
/* Enable ADC1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* Configure PA5 (ADC1 Channel 5) in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure ADC1 */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel5 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_480Cycles);
/* Enable DMA1 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
/* DMA1 Stream0 channel0 configuration */
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream0, &DMA_InitStructure);
/* Enable DMA1 Stream0 */
DMA_Cmd(DMA1_Stream0, ENABLE);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
}
```
然后,我们需要编写一个函数来设置DAC输出的电压值。
```c
void Set_DAC_Voltage(uint16_t value)
{
DAC_SetChannel1Data(DAC_Align_12b_R, value);
DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);
}
```
最后,我们可以编写一个函数来读取ADC采集到的DAC输出的电压值。
```c
uint16_t Get_ADC_Voltage(void)
{
return ADCConvertedValue;
}
```
我们可以在主函数中调用这些函数来进行实验。
```c
int main(void)
{
DAC_ADC_Init();
while (1)
{
Set_DAC_Voltage(2048);
uint16_t adc_value = Get_ADC_Voltage();
// 处理采集到的ADC数值
}
}
```
这样,我们就可以进行STM32实例DAC数模转换实验了。
stm32f103c8t6使用PA和PA1进行ADC1的电压采样,使用DMA方式进行数据传输的代码
你好,以下是使用PA和PA1进行ADC1的电压采样,使用DMA方式进行数据传输的代码:
首先,需要初始化GPIO和ADC1:
```
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN; // Enable GPIOA clock
RCC->APB2ENR |= RCC_APB2ENR_ADC1EN; // Enable ADC1 clock
GPIOA->CRL &= ~(GPIO_CRL_MODE | GPIO_CRL_CNF); // Configure PA as analog input
GPIOA->CRL |= GPIO_CRL_CNF_;
GPIOA->CRL &= ~(GPIO_CRL_MODE1 | GPIO_CRL_CNF1); // Configure PA1 as analog input
GPIOA->CRL |= GPIO_CRL_CNF1_;
ADC1->CR2 |= ADC_CR2_ADON; // Turn on ADC1
ADC1->CR2 |= ADC_CR2_CAL; // Calibrate ADC1
while (ADC1->CR2 & ADC_CR2_CAL); // Wait for calibration to complete
```
然后,需要配置DMA:
```
RCC->AHBENR |= RCC_AHBENR_DMA1EN; // Enable DMA1 clock
DMA1_Channel1->CPAR = (uint32_t)&ADC1->DR; // Set DMA source address to ADC1 data register
DMA1_Channel1->CMAR = (uint32_t)&adc_values; // Set DMA destination address to adc_values array
DMA1_Channel1->CNDTR = ADC_BUFFER_SIZE; // Set DMA transfer size to ADC_BUFFER_SIZE
DMA1_Channel1->CCR |= DMA_CCR1_MINC; // Enable memory increment mode
DMA1_Channel1->CCR |= DMA_CCR1_CIRC; // Enable circular mode
DMA1_Channel1->CCR |= DMA_CCR1_EN; // Enable DMA channel 1
```
最后,需要启动ADC1的转换和DMA传输:
```
ADC1->SQR3 |= ( << ADC_SQR3_SQ1_Pos) | (1 << ADC_SQR3_SQ2_Pos); // Set ADC1 channel sequence to PA and PA1
ADC1->CR2 |= ADC_CR2_DMA; // Enable DMA mode for ADC1
ADC1->CR2 |= ADC_CR2_CONT; // Enable continuous conversion mode for ADC1
ADC1->CR2 |= ADC_CR2_ADON; // Start ADC1 conversion
while (1) {
// Wait for DMA transfer to complete
while (!(DMA1->ISR & DMA_ISR_TCIF1));
DMA1->IFCR |= DMA_IFCR_CTCIF1; // Clear DMA transfer complete flag
// Process ADC values in adc_values array
// ...
// Restart DMA transfer
DMA1_Channel1->CCR &= ~DMA_CCR1_EN; // Disable DMA channel 1
DMA1_Channel1->CNDTR = ADC_BUFFER_SIZE; // Set DMA transfer size to ADC_BUFFER_SIZE
DMA1_Channel1->CCR |= DMA_CCR1_EN; // Enable DMA channel 1
}
```
希望对你有帮助!
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