我使用的stm32板子为stm32f303vct6,请问我应该如何配置四个ADC模块ADC1ADC2ADC3ADC4,请问我应该如何为这四个ADC模块进行配置,以及如何对其DMA进行配置呢?请描述的详细一点
时间: 2023-06-04 22:05:28 浏览: 233
您可以通过以下步骤为四个ADC模块进行配置:
1. 使能ADC时钟:在RCC寄存器中设置ADC1-4对应的时钟使能位(RCC_AHBPeriph_ADC12和RCC_AHBPeriph_ADC34)为1,以启用ADC模块。
2. 配置ADC模块:配置ADC模块的工作模式、采样时间、采样通道等参数。可以使用ADC_Init函数进行配置。
3. 配置DMA:使用DMA控制器进行数据传输,以避免CPU的过度占用。您需要配置DMA通道的源地址(ADC DR地址)、目标地址(缓冲区地址)、数据传输量、传输方向等参数,并启动DMA传输。可以使用DMA_Init和DMA_Cmd函数进行配置和启动。
下面是具体的代码示例:
1. 使能ADC时钟
```
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12 | RCC_AHBPeriph_ADC34, ENABLE);
```
2. 配置ADC模块
```
ADC_InitTypeDef ADC_InitStructure;
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_Init(ADC2, &ADC_InitStructure);
ADC_Init(ADC3, &ADC_InitStructure);
ADC_Init(ADC4, &ADC_InitStructure);
```
3. 配置DMA
```
DMA_InitTypeDef DMA_InitStructure;
DMA_StructInit(&DMA_InitStructure);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(ADC1->DR); // ADC DR地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)buffer; // 缓冲区地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = BUFFER_SIZE; // 数据传输量
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1, ENABLE);
```
以上是总体的代码示例,您可以根据实际情况进行修改和补充。同时,也需要注意对GPIO端口的配置,例如配置对应的模拟输入通道、启用模拟输入等。
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