# miniscope

**Repository Path**: MicroPeople/miniscope

## Basic Information

- **Project Name**: miniscope
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-01-18
- **Last Updated**: 2022-01-25

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## ADC

### 时钟

设置ADC分频因子6，72M/6 = 12M。

RCC_ADCCLKConfig(RCC_PCLK2_Div6);

### 采样频率

因为有两个通道，所以打开扫描模式

ADC_InitStructure.ADC_ScanConvMode = ENABLE;



关闭连续转换模式，否则ADC会一直重新开始转换，而不是由定时器触发

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;



​	ADC由定时器4的通道4触发 上升沿触发

​	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T4_CC4;



 ### 定时器触发周期

TIM_TimeBaseStructure.TIM_Period = 100 - 1;

  TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;

TIM4触发频率为10KHz，周期 = 0.1ms =100 us

### 转换时间

ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_239Cycles5);

239.5 + 12.5 = 252 cycles =252/12M = 21 us

因为100us > 21us，数据有效