使用 C++ 语言给 STM32 编写一个 Adc 类
我使用的STM32芯片：STM32F103ZET6
我们使用的STM32库版本：V3.5.0
注意：
想学习本套 STM32 C++编程 的专栏是有点门槛的。你需要有一点点 STM32 基础 和 一点点 C++ 语言基础。
完整的STM32 C++ Adc类 的下载地址可以在本篇博客的最下面找到。
Adc.cpp
#include "Adc.h"
using namespace stm32f10x;
Adc::Adc(ADC_TypeDef* ADCx, uint8_t ADC_Channel):adcx(ADCx), channel(ADC_Channel){
initialize();
start();
}
void Adc::initialize(){
switch(channel){
case 0:
a = new Gpio(PA, 0, GPIO_Mode_AIN); delete a; break;
case 1:
a = new Gpio(PA, 1, GPIO_Mode_AIN); delete a; break;
case 2:
a = new Gpio(PA, 2, GPIO_Mode_AIN); delete a; break;
case 3:
a = new Gpio(PA, 3, GPIO_Mode_AIN); delete a; break;
case 4:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PA, 4, GPIO_Mode_AIN); delete a; break;
case (uint32_t)ADC3:
a = new Gpio(PF, 6, GPIO_Mode_AIN); delete a; break;
}
break;
case 5:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PA, 5, GPIO_Mode_AIN); delete a; break;
case (uint32_t)ADC3:
a = new Gpio(PF, 7, GPIO_Mode_AIN); delete a; break;
}
break;
case 6:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PA, 6, GPIO_Mode_AIN); delete a; break;
case (uint32_t)ADC3:
a = new Gpio(PF, 8, GPIO_Mode_AIN); delete a; break;
}
break;
case 7:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PA, 7, GPIO_Mode_AIN); delete a; break;
case (uint32_t)ADC3:
a = new Gpio(PF, 9, GPIO_Mode_AIN); delete a; break;
}
break;
case 8:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PB, 0, GPIO_Mode_AIN); delete a; break;
case (uint32_t)ADC3:
a = new Gpio(PF, 10, GPIO_Mode_AIN); delete a; break;
}
break;
case 9:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PB, 1, GPIO_Mode_AIN); delete a; break;
}
break;
case 10:
a = new Gpio(PC, 0, GPIO_Mode_AIN); delete a; break;
case 11:
a = new Gpio(PC, 1, GPIO_Mode_AIN); delete a; break;
case 12:
a = new Gpio(PC, 2, GPIO_Mode_AIN); delete a; break;
case 13:
a = new Gpio(PC, 3, GPIO_Mode_AIN); delete a; break;
case 14:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PC, 4, GPIO_Mode_AIN); delete a; break;
}
break;
case 15:
switch((uint32_t)adcx){
case (uint32_t)ADC1:
case (uint32_t)ADC2:
a = new Gpio(PC, 5, GPIO_Mode_AIN); delete a; break;
}
break;
}
ADC_InitTypeDef ADC_InitStructure;
if((uint32_t)adcx < APB2PERIPH_BASE){
uint32_t RCC_APB1Periph = (uint32_t)(1<< ( ((uint32_t)adcx-APB1PERIPH_BASE)>>10));
RCC_APB1PeriphClockCmd(RCC_APB1Periph, ENABLE);
}
else{
uint32_t RCC_APB2Periph = (uint32_t)(1<< ( ((uint32_t)adcx-APB2PERIPH_BASE)>>10));
RCC_APB2PeriphClockCmd(RCC_APB2Periph, ENABLE);
}
RCC_ADCCLKConfig(RCC_PCLK2_Div6); //设置ADC分频因子6 72M/6=12,ADC最大时间不能超过14M
// ADC_DeInit(ADC1); //复位ADC1,将外设 ADC1 的全部寄存器重设为缺省值
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC工作模式:ADC1和ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //模数转换工作在单通道模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //模数转换工作在单次转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //转换由软件而不是外部触发启动
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1; //顺序进行规则转换的ADC通道的数目
ADC_Init(adcx, &ADC_InitStructure); //根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器
ADC_Cmd(adcx, ENABLE); //使能指定的ADC1
ADC_ResetCalibration(adcx); //使能复位校准
while(ADC_GetResetCalibrationStatus(adcx)); //等待复位校准结束
ADC_StartCalibration(adcx); //开启AD校准
while(ADC_GetCalibrationStatus(adcx)); //等待校准结束
// ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能指定的ADC1的软件转换启动功能
}
uint16_t Adc::read(){
//设置指定ADC的规则组通道，一个序列，采样时间
ADC_RegularChannelConfig(adcx, channel, 1, ADC_SampleTime_239Cycles5 ); //ADC1,ADC通道,采样时间为239.5周期
ADC_SoftwareStartConvCmd(adcx, ENABLE); //使能指定的ADC1的软件转换启动功能
while(!ADC_GetFlagStatus(adcx, ADC_FLAG_EOC ));//等待转换结束
return ADC_GetConversionValue(adcx); //返回最近一次ADC1规则组的转换结果
}
uint16_t Adc::read(uint8_t cout){
u32 temp_val=0;
u8 t;
for(t=0;t<cout;t++){
temp_val+= read();
}
return temp_val/cout;
}
void Adc::start(){
ADC_SoftwareStartConvCmd(ADC1, ENABLE); //使能指定的ADC1的软件转换启动功能
}
void Adc::stop(){
ADC_SoftwareStartConvCmd(ADC1, DISABLE); //使能指定的ADC1的软件转换启动功能
}
Adc.h
#ifndef __AOBO_Stm32f10x_Adc_H_
#define __AOBO_Stm32f10x_Adc_H_
#include "stm32f10x.h"
#include "Gpio.h"
namespace stm32f10x{
class Adc{
public:
Adc(ADC_TypeDef* ADCx, uint8_t ADC_Channel);
void initialize();
uint16_t read();
uint16_t read(uint8_t cout);
void start();
void stop();
private:
Gpio *a;
ADC_TypeDef* adcx;
uint8_t channel;
};
}
#endif
main.cpp
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "Gpio.h"
#include "Usart.h"
#include "Adc.h"
using namespace stm32f10x;
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void){
Usart serial(USART1, 115200);
Adc adc1(ADC3, 11);
while(true){
serial.println("ADC1: %d", adc1.read());
}
}搞定
你可以到这里下载我已经做好的 STM32 C++ Adc类：
百度云 链接：http://pan.baidu.com/s/1bpbZ2MV 密码：esam
也可以在CSDN里面下载：http://download.csdn.net/detail/github_35160620/9624596
小结：
下一讲，我们来使用 C++ 语言，创建一个 STM32 的 硬件 I2c 类。