FDC2214纸张计数显示装置原理图STM32源程序 2019电子设计大赛F题

ID:273434 · 发表于 2020-10-18 20:32

内容包含2019一些大赛题目，以及相关的了解。主要是F题电容的程序实现，采用F4系列单片机，有FDC2214的模块的原理图和PCB。分享给大家。

Altium Designer画的原理图和PCB图如下：(51hei附件中可下载工程文件)

单片机源程序如下:

#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "myiic.h"
#include "FDC2X2X_CMD.h"
#include "FDC2214.h"
#include "led.h"
#include "key.h"
#include "oled.h"
#include "beep.h"
#include "exti.h"
#include "24cxx.h"
#define ROUND_TO_UINT16(x) ((uint16_t)(x)+0.5)>(x)? ((uint16_t)(x)):((uint16_t)(x)+1) //将浮点数x四舍五入为uint16_t
#define MAX_SIZE 100 //最大容量---纸张数
#define GAP_MS 50 //校准测量采样时间间隔
#define DATA_ACQUIRE_NUMBER 20 //数据采集数
#define CH 1 //通道数
#define duty_wideth 0.5 //滤波窗宽度调整系数
u8 Flag_Work=0,Flag_Calibration=0; //Flag_Work :工作标志位。Flag_Work=0，设备处于待机状态；Flag_Work=1，设备处于测量状态。
float Cap; //Cap :设备两极板间电容值，屏幕上实时显示
int Paper_Number; //Paper_Number:设备最终计算得到的A4纸张数
__align(4) u8 dtbuf[50]; //打印缓存器 __align(4)
float Data_Raw[DATA_ACQUIRE_NUMBER],Data_Level[MAX_SIZE],data_acquire[DATA_ACQUIRE_NUMBER];
//排序函数
void bubble(float a[],int n)
{
int i,j;
for(i=0; i<n-1; i++)
{
for(j=n-1; j>i; j--)
{
if(a[j]<a[j-1])
{
float t=a[j];
a[j]=a[j-1];
a[j-1]=t;
}
}
}
}
//短路检测函数
void Danger_Test()
{
if(Cap<0)
{
OLED_ShowString(0,0," Danger !!! ",16);
BEEP=1;
}
}
//启动测量函数
void Start_Measure()
{
int i,j,k,index_min=0,counter,sum_effective;
float variance_high,variance_low,sum_div_sqr,div,div_sqr,sum,baseline,div_min,div_max,high_limit,low_limit,average_effective,data_measure_effective[MAX_SIZE];
if(Flag_Work==1) //如果KEY1按键按下，触发外部中断（工作标志位置1），进入此程序，程序进入测量状态
{
LED1=0; //LED1：测量指示灯
for(i=0; i<DATA_ACQUIRE_NUMBER; i++)
{
Cap=FDC2214_read_CHx(CH); //Cap为设备所采的电容值
data_acquire[i]=Cap;
delay_ms(GAP_MS);
}
bubble(data_acquire,DATA_ACQUIRE_NUMBER);
for(j=0; j<DATA_ACQUIRE_NUMBER; j++)
{
sum+=data_acquire[j];
}
baseline=sum/(float)DATA_ACQUIRE_NUMBER;
div_min=(float)duty_wideth*(baseline-data_acquire[0]);
div_max=(float)duty_wideth*(data_acquire[DATA_ACQUIRE_NUMBER-1]-baseline);
high_limit=baseline+div_max;
low_limit=baseline-div_min;
counter=0;
sum_effective=0.0f;
for(k=0; k<DATA_ACQUIRE_NUMBER; k++)
{
Cap=FDC2214_read_CHx(CH);
delay_ms(GAP_MS);
if((Cap>low_limit)&&(Cap<high_limit))
{
data_measure_effective[counter]=Cap;
sum_effective+=Cap;
counter++;
}
}
average_effective=sum_effective/(float)counter;
for(i=0; i<MAX_SIZE; i++)
{
if(average_effective>Data_Level[i])
break;
}
sum_div_sqr=0.0f;
for(j=0; j<counter; j++)
{
div=data_measure_effective[j]-Data_Level[i-1];
if(div<0)
div=-div;
else div=div;
div_sqr=div*div;
sum_div_sqr+=div_sqr;
}
variance_high=sum_div_sqr/(float)counter;
for(j=0; j<counter; j++)
{
div=data_measure_effective[j]-Data_Level[i];
if(div<0)
div=-div;
else div=div;
div_sqr=div*div;
sum_div_sqr+=div_sqr;
}
variance_low=sum_div_sqr/(float)counter;
if(i>=1)
{
if(variance_high>variance_low)
index_min=i;
else
index_min=i-1;
}
Paper_Number=index_min+1; //下标+1得到纸张数
OLED_ShowNum(0,4,Paper_Number,10,16); //OLED显示纸张数
BEEP=1;
delay_ms(500);
BEEP=0;
LED1=1;
Flag_Work=0; //将工作标志位置0，测试仪进入待机状态
}
}
//校准函数
void Calibration()
{
int i,j,k,counter;
float sum,sum_effective,baseline,high_limit,low_limit,div_min,div_max;
Flag_Calibration=0; //校准标志位，KEY2按键置1，相当于确定
OLED_ShowString(0,0," Calibration ",16);
for(i=0; i<MAX_SIZE; i++) //循环校准不同数量纸的电容值
{
sprintf((char *)dtbuf,"Place %d paper.",i+1);
OLED_ShowString(0,2,dtbuf,16);
OLED_ShowString(0,6," Press KEY2 !!!",16);
while(Flag_Calibration==0)
{
Cap=FDC2214_read_CHx(CH);
sprintf((char *)dtbuf,"Cap:%4.4f pF",Cap);
OLED_ShowString(0,4,dtbuf,16);
}
sum=0;
for(j=0; j<DATA_ACQUIRE_NUMBER; j++) //采集DATA_ACQUIRE_NUMBER次数据并取平均值存入AT24C02
{
Cap=FDC2214_read_CHx(CH);
Data_Raw[j]=Cap;
delay_ms(GAP_MS);
}
bubble(Data_Raw,DATA_ACQUIRE_NUMBER);
for(j=0; j<DATA_ACQUIRE_NUMBER; j++)
{
sum+=Data_Raw[j];
}
baseline=sum/(float)DATA_ACQUIRE_NUMBER;
div_min=(float)duty_wideth*(baseline-Data_Raw[0]);
div_max=(float)duty_wideth*(Data_Raw[DATA_ACQUIRE_NUMBER-1]-baseline);
high_limit=baseline+div_max;
low_limit=baseline-div_min;
counter=0;
sum_effective=0.0f;
for(k=0; k<DATA_ACQUIRE_NUMBER; k++)
{
Cap=FDC2214_read_CHx(CH);
delay_ms(GAP_MS);
if((Cap>low_limit)&&(Cap<high_limit))
{
sum_effective+=Cap;
counter++;
}
}
Data_Level[i]=sum_effective/(float)counter;
if(i==0)
{
storFloatData DATA_LEVEL= { Data_Level[i] }; //向AT24C02写入数据
Storage_WriteFloatNum(4*i,DATA_LEVEL);
BEEP=1;
delay_ms(500);
BEEP=0;
}
if(i>=1)
{
if(Data_Level[i]<Data_Level[i-1])
{
storFloatData DATA_LEVEL= { Data_Level[i] }; //向AT24C02写入数据
Storage_WriteFloatNum(4*i,DATA_LEVEL);
BEEP=1;
delay_ms(500);
BEEP=0;
}
else
{
i=i-1;
BEEP=1;
delay_ms(200);
BEEP=0;
delay_ms(200);
BEEP=1;
delay_ms(200);
BEEP=0;
}
}
Flag_Calibration=0;
}
OLED_Clear();
OLED_ShowString(0,2,"Calibration OK!!",16);
BEEP=1; //校验通过后蜂鸣器响2秒
delay_ms(2000);
BEEP=0;
OLED_Clear();
}
//循环读取AT24C02数据函数
void Read_AT24C02()
{
int i;
for(i=0; i<MAX_SIZE; i++)
{
storFloatData DATA=Storage_ReadFloatNum(4*i);
Data_Level[i]=DATA.value; //录入到Data_Level数组
}
}
int main()
{
delay_init(168); //延时函数初始化
uart_init(115200); //串口初始化为115200
LED_Init();
KEY_Init();
BEEP_Init();
OLED_Init();
EXTIX_Init();
AT24CXX_Init();
FDC2214_Init();
Read_AT24C02(); //上电复位后读取AT24C02中存储的纸张数的电容值均值(做比对参考电容值)
OLED_Clear();
while(1)
{
Cap=FDC2214_read_CHx(CH); //读取电容值
//----------OLED第一行显示内容-------------//
OLED_ShowString(0,0,"|Paper Counter|",16);
//----------OLED第二行显示内容-------------//
OLED_ShowString(0,2,"----------------",16);
//----------OLED第三行显示内容-------------//实时电容值
sprintf((char *)dtbuf,"Cap:%4.4f",Cap);
OLED_ShowString(0,4,dtbuf,16);
OLED_ShowString(112,4,"pF",16);
//----------OLED第四行显示内容-------------//纸张数
OLED_ShowString(0,6,"Number:",16);
OLED_ShowNum(56,6,Paper_Number,9,16);
if(Flag_Calibration==1) //如果KEY2键按下，触发中断进入校准状态，不能退出（可复位重新开始）
{
Calibration(); //校准函数
Flag_Calibration=0;
}
LED0=0; //LED0：待机指示灯--待机状态常亮
BEEP=0; //蜂鸣器，待机状态不响
Danger_Test(); //短路检测
Start_Measure(); //启动测量
}
}