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1. 

   stafil
   Member

   hi,

   why spi not working after detach usb. maple rev 5 is powered with external 5v. i used maple ide 12. lcd 4x20 works well.

   thx

   Posted 3 years ago #
2. 

   stafil
   Member

   code is here:

   //#include <string.h>

   #include <Wire.h> // For some strange reasons, Wire.h must be included here
   #include <FRAM.h>
   #include <LiquidCrystal.h>

   char MSG_DEVICE_NAME[] __FLASH__ = "PowerMeter";
   char MSG_DEVICE_NAME1[] __FLASH__ = "Graviton, SF";
   char MSG_DEVICE_NAME2[] __FLASH__ = "Poprad, Slovakia";
   char MSG_DEVICE_VER[] __FLASH__ = "V.: ";

   HardwareSPI spiSA9904(2);

   #define _DeviceAddress_I2C_FRAM B1010000
   FRAMClass fram = FRAMClass(_DeviceAddress_I2C_FRAM, FRAM_24C64);

   unsigned long opozdenie = millis();
   unsigned long oldmillis = millis();

   int CountSamples = 0;
   const int nSamples = 1;

   long zlepackety = 0;
   long vsetkypackety = 0;

   //#define SPI_DEBUG //Set this to 1 for SPI debug to enable

   struct sCAL
   {
   int volt; //voltage correction
   };

   struct sSetup
   {
   float v_nom; //applied volatge [V]
   float i_max; //max load current [A]
   };

   //chip-related constants
   const long RATE = 320000; //register update rate
   const long CLOCKFREQ = 3579545; //clock frequency
   const float CRYSTAL_DIV256 = (float)CLOCKFREQ / 256.0f; //constant in frequency calculation, see application note.
   const unsigned long LAST_10 = 0x3FF; //mask for last 10 bits in 24 bit number
   const unsigned long LIMIT = 0xFFFFFF; //upperlimit for 24 bits

   const int PHASE = 3; //3phase device
   float epc; //energy per count
   sSetup Setup;
   sCAL CAL[PHASE];

   float energy_A; // Ws
   float energy_R; // Vars
   //float aWs; // Ws skutocne po prepocitani casu
   //float aVars; // Vars skutocne po prepocitani casu
   float A;// kW/h
   float R;// kVar/h
   float U;
   float I;
   float f;
   float Fi;
   float cosFi;
   float sinFi;
   bool ph_cross0; // Voltage zero crossover
   bool ph_seq; // Phase sequence error
   bool ph_err; // Missing phase
   bool ph_errph[3]; // Missing phases
   long cas_merania;

   void setup_meter()
   {
   epc = (Setup.v_nom * Setup.i_max) / RATE;

   //if(VycitajDataZIC() == true)
   // set_volt_cal();

   // first = true;
   }

   void defaults()
   {
   Setup.v_nom = 230.0f;
   Setup.i_max = 50.0f;

   CAL[0].volt = 810;//795;
   CAL[1].volt = 826;//795;
   CAL[2].volt = 827;//795;

   // MinW = 4.5;
   }

   bool sample = false;

   const uint8 nRows = 4; //number of rows on LCD
   const uint8 nColumns = 20; //number of columns on LCD
   const byte LCD_backlight_pin = 29;

   LiquidCrystal lcd(23, 24, 25, 26, 27, 28);

   void setup()
   {
   Wire.begin(0x00, PORTI2C2, I2C_FAST_MODE | I2C_DUTY_16_9);
   // spiSA9904.begin(SPI_281_250KHZ, MSBFIRST, SPI_MODE_0);

   // lcd.setBacklightPin(LCD_backlight_pin, POSITIVE);
   lcd.begin(nColumns, nRows);
   // lcd.createChar(0, arrow_up);
   // lcd.createChar(1, arrow_down);
   // lcd.createChar(3, bell);
   // lcd.setBacklight(LCDbackLightON);

   lcd.setCursor(0, 0);
   lcd.print(MSG_DEVICE_NAME);
   lcd.setCursor(0, 1);
   lcd.print(MSG_DEVICE_NAME1);
   lcd.setCursor(0, 2);
   lcd.print(MSG_DEVICE_NAME2);
   lcd.setCursor(0, 3);
   lcd.print(MSG_DEVICE_VER);
   lcd.print(__DATE__);

   delay(2000);
   defaults();
   setup_meter();

   // SerialUSB.println("Starting...");

   pinMode(BOARD_LED_PIN, OUTPUT);

   pinMode(spiSA9904.nssPin(), OUTPUT);
   digitalWrite(spiSA9904.nssPin(), LOW);

   const int interruptPinSA9904B = 35;
   pinMode(interruptPinSA9904B, INPUT_FLOATING);
   attachInterrupt(interruptPinSA9904B, _F50sampleSA9904, FALLING);

   lcd.clear();

   }

   unsigned long iLCDLoop = millis();

   void loop()
   {
   if(sample) //read all registers starting from active
   {
   int F50time = millis()-oldmillis;
   oldmillis = millis();
   // lcd.setCursor(10, 0);
   // lcd.print(F50time);
   //#ifdef SPI_DEBUG
   // SerialUSB.print("F50 time:;");
   // SerialUSB.print(F50time);
   // SerialUSB.print("; ");
   //#endif
   // if(F50time < 18 | F50time > 22)
   // SerialUSB.println(";ERR F50time;");

   F50sampleSA9904();
   //#ifdef SPI_DEBUG
   // SerialUSB.println("");
   //#endif
   ZobrazDataLCD();
   sample = false;
   }
   }

   void ZobrazDataLCD()
   {
   if( millis() > iLCDLoop + 800 )
   {
   // SerialUSB.print("lcd s:");
   // SerialUSB.print(millis());
   LCDClearRow(0);
   lcd.setCursor(0, 0);
   lcd.print(vsetkypackety,DEC);
   LCDClearRow(1);
   lcd.setCursor(0, 1);
   lcd.print(zlepackety,DEC);

   for(int i = 0; i< 20; i++)
   {
   // byte read1 = fram.read_byte(i);
   // lcd.print(char(read1));
   }
   // SerialUSB.print("lcd k:");
   // SerialUSB.println(millis());

   LCDClearRow(2);
   lcd.setCursor(0, 2);
   lcd.print(U,3);
   LCDClearRow(3);
   lcd.setCursor(0, 3);
   lcd.print(f,3);

   iLCDLoop = millis();
   }
   }

   void LCDClearRow(byte row)
   {
   lcd.setCursor(0, row);
   for(byte i = 0; i < nColumns; i++)
   lcd.print(" ");
   }

   void _F50sampleSA9904() // F50 impulse
   {
   CountSamples++;
   if(CountSamples == nSamples)
   {
   sample = true;
   CountSamples = 0;
   }
   }

   void F50sampleSA9904()
   {
   byte rx[37] = {};
   unsigned long reg1[4] = {};

   readSA9904B(0, rx, 36);
   vsetkypackety++;

   reg1[0] = convertbutolong(rx, 0);
   reg1[1] = convertbutolong(rx, 3);
   reg1[2] = convertbutolong(rx, 6);
   reg1[3] = convertbutolong(rx, 9);

   A = SamplesA(0, reg1[0]);
   R = SamplesR(0, reg1[1]);
   U = SamplesU(0, reg1[2]);
   f = SamplesFregvency(reg1[3]);

   //#ifdef SPI_DEBUG
   // SerialUSB.print(";A=;");
   // SerialUSB.print(A,3);

   // SerialUSB.print(";R=;");
   // SerialUSB.print(R,3);

   // SerialUSB.print(";U=;");
   // SerialUSB.print(U,3);

   // SerialUSB.print(";f=;");
   // SerialUSB.print(f,3);
   //#endif

   if(f < 40 || f > 60)
   {
   // SerialUSB.println(";ERR;");
   zlepackety++;
   }
   }

   float SamplesA(byte ph, long regA)
   {
   float a = 0;
   a = float(wrap(regA));

   return a;
   }

   float SamplesR(byte ph, long regR)
   {
   float r = 0;
   r = float(wrap(regR));
   return r;
   }

   float SamplesU(byte ph, long regU)
   {
   float u = 0;
   if (CAL[ph].volt != 0 && Setup.v_nom != 0)
   u = (float)(regU / (float)CAL[ph].volt * Setup.v_nom);

   return u;
   }

   float SamplesFregvency(long regFregvency)
   {
   long fmr = regFregvency & LAST_10;
   float ff = 0;
   if (fmr != 0)
   ff = (float)(CRYSTAL_DIV256 / fmr);

   return ff;
   }

   long wrap(long value)
   {
   int sign = 1;
   if( abs(value) > 0x7FFFFF) //val>8388607?
   {
   if(value>0)
   sign=-1;
   value=(0x1000000+(sign*value))*sign; //(16777216(+or-)value)*(+or-)
   }
   return (value);
   }

   void readSA9904B(byte startreg, byte *data, byte bytesreq)
   {
   spiSA9904.begin(SPI_281_250KHZ, MSBFIRST, SPI_MODE_0);

   digitalWrite(spiSA9904.nssPin(), HIGH);
   spiSA9904.transfer(0x01);
   spiSA9904.transfer(startreg | 0x80);
   spiSA9904.begin(SPI_281_250KHZ, MSBFIRST, SPI_MODE_1);
   for(byte i = 0; i < bytesreq; i++)
   data[i]=spiSA9904.transfer(0x00);
   digitalWrite(spiSA9904.nssPin(), LOW);
   spiSA9904.end();

   #ifdef SPI_DEBUG
   SerialUSB.print(";registers; ");
   for(byte i=0;i<bytesreq;i++)
   {
   SerialUSB.print(data[i], HEX);
   SerialUSB.print(";");
   }
   #endif
   }

   unsigned long convertbutolong(byte *buf, int idx)
   {
   return ((unsigned long)buf[idx]<<16 | (unsigned long)buf[idx+1]<<8 | (unsigned long)buf[idx+2]) & LIMIT;
   }

   Posted 3 years ago #
3. 

   gbulmer
   Moderator

   stafil - would you please take note of the "Guidelines for Posting" http://forums.leaflabs.com/topic.php?id=994
   Specifically it asks:

   When posting code:

   • Don't post long (multi-page) code listings directly into the forum. Use something like Pastebin or GitHub Gists instead.

   I think your example is so long and complex that people might find it quite difficult to give help. Have you got a shorter and simpler example which has the bug?

   Posted 3 years ago #
4. 

   stafil
   Member

   I have a maple rev 5 is connected to 5V via a usb dupe program. The program communicates with SA9904 spi2 correctly. when I unplug the USB and press RESET and communication after spi2 not work. Please advise me.

   Posted 3 years ago #
5. 

   gbulmer
   Moderator

   starfil - Have you got a simpler example program which still has the bug?

   When you try to reduce the program, you might identify the bug anyway.
   By showing us a shorter program, it is more likely to someone will read it and try to help.

   Posted 3 years ago #
6. 

   stafil
   Member

   here is a simple code. https://gist.github.com/3bf4afa7b8eba06fca1e

   Posted 3 years ago #
7. 

   stafil
   Member

   Thanks to all who answered me. I've solved it. I do not know why must be NSS pin after setting up spi.begin. But that's no longer the case. Well it would be if it was mentioned in the documentation.

   this-> spi-> begin (SPI_281_250KHZ, MSBFIRST, SPI_MODE_0);
   pinMode (this-> spi-> nssPin (), OUTPUT);

   Thank you

   Posted 3 years ago #

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