Diff: main.cpp

Revision:

0:b418a81d46b0

Child:

1:7f60e5e44a1b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 08 11:18:24 2021 +0000
@@ -0,0 +1,226 @@
+#include "mbed.h"
+//#include "USBSerial.h"
+#include "ssd1306.h"
+#include "SDFileSystem.h"
+
+#define fator_filtro 5
+#define ctoT 0.224f
+ 
+SDFileSystem sd(D11, D12, D13, D10, "sd"); // the pinout on the mbed Cool Components workshop board
+
+FILE *myLogFile;
+  
+AnalogIn amp_pin(A0);
+AnalogIn volt_pin(A3);
+
+//Virtual serial port over USB
+//USBSerial device;
+Serial pc(USBTX, USBRX);
+ 
+SSD1306 lcd (D14, D15); // assumes default I2C address of 0x78
+
+Ticker flipper;
+Timer fileOpenTimer;
+Timer debug_timer;
+
+//DigitalOut led(D13);
+DigitalIn sw(PC_13);
+
+float mAmp_S;
+float mAmp;
+float mAmp_filtred;
+float mAmp_filtred_old;
+
+int second = 0;
+int minute = 0;
+int hour = 0;
+bool flag;
+ 
+FILE *nextLogFile(void)
+{
+    static unsigned int fileNumber = 0;
+    char fileName[32];
+    FILE *filePtr = NULL;
+    do 
+    {
+        if (filePtr != NULL)
+            fclose(filePtr);
+        sprintf(fileName,"/sd/log%04u.csv",fileNumber++);
+        filePtr = fopen(fileName,"r");
+    } while (filePtr != NULL);
+    return fopen( fileName,"w");
+} 
+ 
+ 
+void mAmp_time_base()
+{
+    mAmp_S = mAmp_S + mAmp_filtred; 
+    //led=!led;
+    second++;
+    flag =! flag;
+} 
+ 
+int main(void) 
+{
+    
+    float volt;
+    float volt_filtred;
+    float volt_filtred_old;
+    
+    float mAmp_H;
+    bool start = 0;
+    
+    lcd.speed (SSD1306::Medium);  // set working frequency
+    lcd.init();                   // initialize SSD1306
+    lcd.set_contrast(100);
+    lcd.cls();                    // clear frame buffer
+    lcd.locate (3,2);             // set text cursor to line 3, column 1
+    lcd.printf ("Starting up"); // print to frame buffer
+    for( int i = 0; i < 16; i++)
+    {
+        lcd.locate (4,i);
+        lcd.printf (".");
+        lcd.redraw();
+        wait_ms(150);
+    }
+    wait_ms(300);
+    lcd.cls();
+    lcd.redraw();
+        
+    myLogFile = nextLogFile();
+    if (!myLogFile) {
+        // ERROR failed to open the first log file for writing.
+        // The SD card is missing, not working, read only or full?
+ 
+        return 1; // probably want to exit the program in this situation
+    }
+    float fator_filtro_x_ctoT = fator_filtro * ctoT;
+    float soma_fator_filtro_x_ctoT = 1.0f + fator_filtro_x_ctoT;
+    
+    printf("%f\n",fator_filtro_x_ctoT);  
+    printf("%f\n",soma_fator_filtro_x_ctoT);  
+      
+    while(1)
+    {     
+        //debug_timer.reset();     
+        //debug_timer.start();
+        
+         
+        if((sw == 0) && (start == 0))
+        {
+            wait_ms(200);
+            if((sw == 0) && (start == 0))
+            {
+                start = 1;
+                wait_ms(1000);
+                flipper.attach(&mAmp_time_base, 1.0f); 
+                fileOpenTimer.start();  
+                lcd.cls();  
+            }
+        }
+        
+        if((sw == 0) && (start == 1))
+        {
+            wait_ms(200);
+            if((sw == 0) && (start == 1))
+            {
+                start = 0;
+                flipper.detach(); 
+                lcd.locate(1,1);
+                lcd.printf("Log finished");
+                lcd.redraw();
+                fileOpenTimer.stop(); 
+                fileOpenTimer.reset(); // restart the timer 
+                fclose(myLogFile); // close the current file
+                myLogFile = nextLogFile(); // open a new file   
+                wait_ms(5000);
+                mAmp_S = 0;
+                mAmp_H = 0;
+                second = 0;
+                minute = 0;
+                hour = 0;  
+                lcd.cls();
+                lcd.redraw();
+            }
+        }
+        
+        
+        //mAmp = amp_pin.read() * 3.3f * 14.6f;
+        //mAmp = mAmp * 1.37f * 100.0f;
+        
+        mAmp = amp_pin.read() * 4870.0f;//6600.66f ;
+        
+        mAmp_filtred =  ((fator_filtro_x_ctoT * mAmp) + (mAmp_filtred_old)) / soma_fator_filtro_x_ctoT;
+        mAmp_filtred_old = mAmp_filtred;
+        
+        
+        volt = volt_pin.read() * 36.45f; //3.3f * divisor resistivo 10k / 1k
+         
+        volt_filtred =  ((fator_filtro_x_ctoT * volt) + (volt_filtred_old)) / soma_fator_filtro_x_ctoT;
+        volt_filtred_old = volt_filtred; 
+         
+         
+        if(start == 0)
+        {
+            lcd.locate(1,1);
+            lcd.printf("Press to log"); 
+        }
+        
+        if(start == 1)
+        {
+            mAmp_H = mAmp_S / 3600.0f;  
+            lcd.locate(1,1);
+            lcd.printf("Logging..."); 
+            lcd.locate(5,1);
+            lcd.printf("%8.2f mAh",mAmp_H); 
+            lcd.locate(7,1);
+            lcd.printf("%02i:%02i:%02i",hour, minute, second); 
+        }
+             
+             
+        if(second > 59)
+        {
+            second = 0;
+            minute++;
+        }
+        
+        if(minute > 59)
+        {
+            minute = 0;
+            hour++; 
+        }
+        
+        if(hour > 23)
+        {
+            hour = 0; 
+        }
+        
+        lcd.locate(3,1);
+        lcd.printf("%8.2f V",volt_filtred);
+        
+        lcd.locate(4,1);
+        lcd.printf("%8.2f mA",mAmp_filtred); 
+          
+        lcd.redraw();
+        
+        if(flag == 1)
+        {
+            flag = 0;
+            if(start == 1)
+            {
+                fprintf(myLogFile, "%02i:%02i:%02i ; %8.2f ; %8.2f ; %8.2f\n", hour, minute, second, volt_filtred, mAmp_filtred, mAmp_H);
+            }
+        }
+        
+        if (fileOpenTimer > (5*60)) 
+        { // file has been open 5 minutes
+            fclose(myLogFile); // close the current file
+            myLogFile = nextLogFile(); // open a new file   
+            fileOpenTimer.reset(); // restart the timer
+        }
+        wait_ms(200);  
+        
+        //debug_timer.stop();
+        //printf("%f\n", debug_timer.read());
+    }
+}