LeafLabs Garden » Topic: spi not working

LeafLabs Garden » Topic: spi not working http://forums.leaflabs.com/topic.php?id=9913 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:20:48 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php stafil on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21730 Wed, 19 Dec 2012 14:58:57 +0000 stafil 21730@http://forums.leaflabs.com/ 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 stafil on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21687 Mon, 17 Dec 2012 01:40:26 +0000 stafil 21687@http://forums.leaflabs.com/ here is a simple code. <a href="https://gist.github.com/3bf4afa7b8eba06fca1e" rel="nofollow">https://gist.github.com/3bf4afa7b8eba06fca1e</a> gbulmer on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21683 Sun, 16 Dec 2012 13:38:49 +0000 gbulmer 21683@http://forums.leaflabs.com/ 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. stafil on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21682 Sun, 16 Dec 2012 13:00:05 +0000 stafil 21682@http://forums.leaflabs.com/ 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. gbulmer on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21681 Sun, 16 Dec 2012 12:33:49 +0000 gbulmer 21681@http://forums.leaflabs.com/ stafil - would you please take note of the "Guidelines for Posting" <a href="http://forums.leaflabs.com/topic.php?id=994" rel="nofollow">http://forums.leaflabs.com/topic.php?id=994</a> Specifically it asks: When posting code: <ul> <li>Don't post long (multi-page) code listings directly into the forum. Use something like <a href="http://pastebin.com">Pastebin</a> or <a href="https://gist.github.com/">GitHub Gists</a> instead.</li> </ul> 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? stafil on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21680 Sun, 16 Dec 2012 11:19:52 +0000 stafil 21680@http://forums.leaflabs.com/ 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; } stafil on "spi not working" http://forums.leaflabs.com/topic.php?id=9913#post-21675 Sun, 16 Dec 2012 07:11:42 +0000 stafil 21675@http://forums.leaflabs.com/ 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