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1 File: /home/peppino/sketchbook/g3tr_due/g3tr_due.ino Pagina 1 di 5 / filename: g3tr_due.ino G3TR means: Giuseppe Talarico Transistor Type Recognizer ( Identifier ) This version is for ARDUINO DUE with direct ARM, ATSAM3X8E, Register manipulation. Just only two 10K resistors and a serial terminal program are needed to implement a simple and powerfull digital Transistor Tester. The circuit allows to test any type of transistor ( npn,pnp, n-channel, p-channel ) both low or High Power. The program tell us if the transistor under test is working or not and which is his type for example: NPN-BJT, PNP-BJT, NCHANNEL-MOSFET, PCHANNEL-MOSFET. The program test diode too and tell us where the Anode is attached ( RED CABLE or BLACK CABLE) Devices broken or shorted are decoded too. Date: 4 settembre 2013 Author: Giuseppe Talarico Internet: giuseppetalarico.wordpress.com / / G3TR Schematic: DRAIN_IN (C1) D33 < R_DRAIN_OUT (C3) D35 > K Drain ( Collector ) ( A ) ( A ) ( red cable ) SOURCE_OUT (C5) D37 > Source ( Emitter ) ( K ) ( K ) ( black cable ) R_GATE_OUT (C7) D39 > K Gate ( Base ) ( white cable ) BJT_MOSFET_IN (C9) D41 < BTN \ (C18) D45 < \ GND / //ATSAM3X8E: Parallel Input/Output Controller (PIO) pag. 641 data sheet // my defines #define PIOC_ID ID_PIOC // ID_PIOC=13 // pag. 47 #define WPEN 0 // Write Protect Enable // PIOC input port pin: #define BTN 18 // (D45) DIGITAL PINC.18 Button Switch #define DRAIN_IN 1 // (D33) DIGITAL PINC.1 #define BJT_MOSFET_IN 9 // (D41) DIGITAL PINC.9 // PIOC output port pin: #define R_GATE_OUT 7 // (D39) DIGITAL PINC.7 #define SOURCE_OUT 5 // (D37) DIGITAL PINC.5 #define R_DRAIN_OUT 3 // (D35) DIGITAL PINC.3 // #define ulp unsigned long // unsigned long pointer ( to save listing space ) // my macros #define readpin(port,bitnumber) ((0x (1 << bitnumber )) & port) #define setbit(port,bitnumber) port = (1 << bitnumber) // global variables

2 File: /home/peppino/sketchbook/g3tr_due/g3tr_due.ino Pagina 2 di 5 boolean identified; // constant Strings const char title[] ="\n\n\r Transistor Type Recognizer ( Identifier ) on Arduino-Due \n\n\r"; const char prompt[] ="\n\rg3tr> "; // global ARM registers pointers //Every peripheral in the SAM3X is off by default (to save power) and should be turned on. //PMC Peripheral Clock Enable Register 0: pag. 561 unsigned long ppmc_pcer0 = (ulp)&reg_pmc_pcer0; //0x400E0610; unsigned long ppmc_wpmr = (ulp)&reg_pmc_wpmr; //0x400E06E4; // PMC Write Protect Mode pag. 581 unsigned long ppioc_wpmr = (ulp)&reg_pioc_wpmr; //0x400E12E4; // PIOC Write Protect Mode pag. 677 unsigned long ppioc_per = (ulp)&reg_pioc_per; //0x400E1200; // PIO Enable Register pag. 656 //PIOC output: unsigned long ppioc_oer = (ulp)&reg_pioc_oer; //0x400E1210; // Output Enable Register pag. 657 unsigned long ppioc_sodr = (ulp)&reg_pioc_sodr; //0x400E1230; // Set Output Data Register pag. 660 unsigned long ppioc_codr = (ulp)&reg_pioc_codr; //0x400E1234; // Clear Output Data Register pag. 661 //PIOC input: unsigned long ppioc_pdsr = (ulp)&reg_pioc_pdsr; //0x400E123C; // Pin Data Status Register pag. 662 unsigned long ppioc_pudr = (ulp)&reg_pioc_pudr; //0x400E1260; // Pullup Disable Register pag. 666 unsigned long ppioc_puer = (ulp)&reg_pioc_puer; //0x400E1264; // Pullup Enable Register " " // g3tr procedures void try_npn_nchannel(void) //Serial.println("try npn/n-channel...\n"); // Polarize the transistor under test like NPN or NCHANNEL setbit(ppioc_sodr, R_GATE_OUT); // gate (base) > H setbit(ppioc_sodr, R_DRAIN_OUT); // drain (collector)--> H setbit(ppioc_codr, SOURCE_OUT); // source (emitter) --> L delay( 20 ); // msec if(readpin(ppioc_pdsr,drain_in)== 0) // may be npn or n-channel setbit(ppioc_codr, R_GATE_OUT); // gate (base) > L //It is npn or n-channel // now it decides for npn-bjt or nchannel-mosfet setbit(ppioc_sodr, R_GATE_OUT); // gate (base) > H if (readpin(ppioc_pdsr,bjt_mosfet_in)!= 0) Serial.println("N-CHANNEL MOSFET"); else Serial.println("NPN BJT"); //end try_npn_nchannel // void try_pnp_pchannel(void) //Serial.println("try pnp/p-channel...\n"); // Polarize the transistor under test like PNP or PCHANNEL

3 File: /home/peppino/sketchbook/g3tr_due/g3tr_due.ino Pagina 3 di 5 setbit(ppioc_sodr, R_GATE_OUT); // gate (base) > H setbit(ppioc_codr, R_DRAIN_OUT); // drain (collector)--> L setbit(ppioc_sodr, SOURCE_OUT); // source (emitter) --> H if (readpin(ppioc_pdsr,drain_in)== 0) // may be pnp or p-channel setbit(ppioc_codr, R_GATE_OUT); // gate (base) --> L //It is pnp or p-channel // now it decides for pnp-bjt or p-channel mosfet setbit(ppioc_codr, R_GATE_OUT); // gate (base) --> L if (readpin(ppioc_pdsr,bjt_mosfet_in)== 0) Serial.println("P-CHANNEL MOSFET"); else Serial.println("PNP BJT"); //end try_pnp_pchannel() // void try_diode(void) //Serial.println("try DIODE..."); //Polarize the DIODE under test setbit(ppioc_sodr, R_DRAIN_OUT); // Anode ---> H // Catode---> L setbit(ppioc_codr, SOURCE_OUT); if ( readpin(ppioc_pdsr,drain_in)== 0) //may be a DIODE; to verify, invert Polarization setbit(ppioc_codr, R_DRAIN_OUT); setbit(ppioc_sodr, SOURCE_OUT); // Anode ---> L // Catode---> H if ( readpin(ppioc_pdsr,drain_in)== 0) Serial.println("DIODE [Anode on RED cable]"); //Polarize the DIODE under test in a different way setbit(ppioc_codr, SOURCE_OUT); // Catode--> L setbit(ppioc_sodr, R_DRAIN_OUT); // Anode---> H //may be a DIODE, so invert Polarization setbit(ppioc_codr, R_DRAIN_OUT); // Anode --> L setbit(ppioc_sodr, SOURCE_OUT); // Catode --> H Serial.println("DIODE [Anode on BLACK cable]"); //end try_diode()

4 File: /home/peppino/sketchbook/g3tr_due/g3tr_due.ino Pagina 4 di 5 // void try_short(void) setbit(ppioc_sodr, R_DRAIN_OUT); // H setbit(ppioc_codr, SOURCE_OUT); // L if (readpin(ppioc_pdsr,drain_in)== 0) setbit(ppioc_codr, R_DRAIN_OUT); // L setbit(ppioc_sodr, SOURCE_OUT); // H Serial.println("DEVICE SHORTED"); //end try_short(); // void try_broken(void) setbit(ppioc_sodr, R_DRAIN_OUT); setbit(ppioc_codr, SOURCE_OUT); // H // L setbit(ppioc_codr, R_DRAIN_OUT); // L setbit(ppioc_sodr, SOURCE_OUT); // H if (readpin(ppioc_pdsr,drain_in)== 0) Serial.println("DEVICE BROKEN"); //end try_broken() //================================= S E T U P ===================================== void setup() Serial.begin(115200); ppmc_wpmr = 0x504D4300; //Disable PMC write protect; 0x504D43 ( PMC in ASCII) pag. 581 //Every peripheral in the SAM3X is off by default (to save power) and should be turned on. setbit(ppmc_pcer0, PIOC_ID); // Enables PIOC peripheral clock // 0 = No effect. // 1 = Enables the corresponding peripheral clock. //( see pag. 655 note (3) on pioc_pdsr!!!!!!) //PIOC: ppioc_wpmr = 0x50494F00; //Disable PIOC write protect; 0x50494F ( PIO in ASCII). //Configure Outputs: setbit(ppioc_oer, R_GATE_OUT); setbit(ppioc_oer, SOURCE_OUT); setbit(ppioc_oer, R_DRAIN_OUT); //configure Inputs: setbit(ppioc_per, DRAIN_IN); //Enables the PIO to control the corresponding pin //(disables peripheral control of the pin) setbit(ppioc_per, BJT_MOSFET_IN);// "

5 File: /home/peppino/sketchbook/g3tr_due/g3tr_due.ino Pagina 5 di 5 setbit(ppioc_per, BTN); // " setbit(ppioc_pudr, DRAIN_IN); //disable pullup setbit(ppioc_pudr, BJT_MOSFET_IN);//disable pullup setbit(ppioc_puer, BTN); setbit(ppmc_wpmr,wpen); setbit(ppioc_wpmr,wpen); //enable internal pullup on BTN // Enables the Write Protect on PMC Write Protect Mode Register // Enables the Write Protect //end setup //================================= L O O P ===================================== void loop() Serial.println(title); Serial.print(prompt); while (true) if (identified) //delay(100); Serial.print(prompt); if(readpin(ppioc_pdsr,btn)== 0) delay(300); try_npn_nchannel(); try_pnp_pchannel(); try_diode(); try_short(); try_broken(); //end while // end loop