[零基础学习STM32]第九讲:ADC实验—电源监控 -

//--------------------------- Include ---------------------------//
#include "..\include\led.h"
#include "..\include\main.h"
#include "..\include\usart.h"
#include "..\include\adc.h"
#include "..\fwlib\inc\stm32f4xx_gpio.h"
//---------------------------- Define ---------------------------//
//-------------------------- Variable ---------------------------//
//--------------------- Function Prototype ----------------------//
//--------------------------- Function --------------------------//
/*
* Name : main
* Description : ---
* Author : ysloveivy.
*
* History
* --------------------
* Rev : 0.00
* Date : 11/21/2015
*
* create.
* --------------------
*/
int main(void)
{
int i;
//初始化
led.initialize();
LED_RED_ON;
usart4.initialize(115200);
adc.initialize();
usart4.printf("\x0c"); //清屏
usart4.printf("\033[1;32;40m"); //设置终端字体为绿色
usart4.printf("\r\n\r\nhello! I am iCore3!\r\n\r\n\r\n");
while(1){
for(i = 0;i < 10000000;i++);
//ADC 监控电源
for(i = 0;i < 5;i++){
adc.read(i);
}
//打印系统供电电压，
usart4.printf(" [V] %4.2fV, ",adc.value[0] * 6);
usart4.printf("[I] %3.0fmA , ",adc.value[1] / 2* 1000.);
usart4.printf("[1.2V] %4.2fV, ",adc.value[2]);
usart4.printf("[3.3V] %4.2fV, ",adc.value[3] * 2);
usart4.printf("[2.5V] %4.2fV\r",adc.value[4] * 2);
}
}

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/*
* Name : initialize
* Description : ---
* Author : ysloveivy.
*
* History
* --------------------
* Rev : 0.00
* Date : 11/21/2015
*
* create.
* --------------------
*/
static int initialize(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //使能ADC1时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE); //使能ADC3时钟
//ADC1_PC4<----->通道14, ADC1_PC5<----->通道15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; //模拟输入
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//ADC3_PF5<----->通道15, ADC3_PF6<----->通道4, ADC3_PF7<----->通道5
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; //模拟输入
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOF, &GPIO_InitStructure);
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; //ADC为独立模式
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; //设置两个采样阶段之间的延迟周期数为5个周期
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; //禁止DMA
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div6; //设置分频系数为6分频
ADC_CommonInit(&ADC_CommonInitStructure);
//初始化ADC
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; //ADC转换分辨率12位
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //非扫描模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //关闭连续转换模式
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; //禁止触发检测
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //右对齐方式
ADC_InitStructure.ADC_NbrOfConversion = 1; //1个转换在规则序列中
ADC_Init(ADC1, &ADC_InitStructure);
ADC_Init(ADC3, &ADC_InitStructure); //使能ADC
ADC_Cmd(ADC1, ENABLE);
ADC_Cmd(ADC3, ENABLE);
return 0;
}
/*
* Name : sort
* Description : ---
* Author : XiaomaGee.
*
* History
* ----------------------
* Rev : 0.00
* Date : 11/21/2015
*
* create.
* ----------------------
*/
void sort(unsigned short int a[], int n)
{
int i, j, t;
//元素从小到大排列
for (i = 0; i < n - 1; i++) {
for (j = 0; j < n - i - 1; j++) {
if (a[j] > a[j + 1]) {
t = a[j];
a[j] = a[j + 1];
a[j + 1] = t;
}
}
}
}
/*
* Name : read_adc
* Description : ---
* Author : ysloveivy.
*
* History
* ----------------------
* Rev : 0.00
* Date : 11/21/2015
*
* create.
* ----------------------
*/
static int read_adc(int channel)
{
int i,k;
unsigned long int temp[20] = {0};
unsigned long int value;
unsigned short int data[100];
unsigned char channel_remap[5] = {ADC_Channel_14,ADC_Channel_15,ADC_Channel_15,ADC_Channel_4,ADC_Channel_5};
//取得到的100个转换值的中间20个的平均值作为结果
//连续取20次这样的平均值，再求平均值作为最终结果
for(k = 0;k < 20;k++){
for(i = 0;i < 100;i++){
if(channel == 0 || channel == 1){
ADC_RegularChannelConfig(ADC1, channel_remap[channel], 1, ADC_SampleTime_480Cycles); //ADC1规则通道为通道14，15，一个序列，采样时间为480个周期
ADC_SoftwareStartConv(ADC1); //使能指定的ADC1的软件转换启动功能
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)); //等待转换结束
data[i] = ADC_GetConversionValue(ADC1); //将结果保存
}else {
ADC_RegularChannelConfig(ADC3, channel_remap[channel], 1, ADC_SampleTime_480Cycles); //ADC3规则通道为通道15，4，5，一个序列，采样时间为480个周期
ADC_SoftwareStartConv(ADC3);
while(!ADC_GetFlagStatus(ADC3,
ADC_FLAG_EOC));
data[i] = ADC_GetConversionValue(ADC3);
}
}
sort(data,100);
for(i = 40;i < 60;i++){
temp[k] += data[i];
}
temp[k] = temp[k] / 20;
}
value = 0;
for(k = 0;k < 20;k++){
value += temp[k];
}
value /= 20;
adc.value[channel] = value * ADC_REF / 4096;
return value;
}

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ADC选用	监测内容
ADC1-14通道	5V电压
ADC1-15通道	输入电流
ADC3-15通道	1.2V电压
ADC3-4通道	3.3V电压
ADC3-5通道	2.5V电压