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medição de corrente de comunicacao USB, com display e log em sdcard
Dependencies: mbed SDFileSystem2 ssd1306_library USBDevice
main.cpp
- Committer:
- Marcelocostanzo
- Date:
- 2021-01-08
- Revision:
- 0:b418a81d46b0
File content as of revision 0:b418a81d46b0:
#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()); } }