_ADS1299_6.zip

// // ADS1299.cpp // // Created by Conor Russomanno on 6/17/13. // #include "pins_arduino.h" #include "ADS1299.h" void ADS1299::setup(int _DRDY, int _CS){ // **** ----- SPI Setup ----- **** // // Set direction register for SCK and MOSI pin. // MISO pin automatically overrides to INPUT. // When the SS pin is set as OUTPUT, it can be used as // a general purpose output port (it doesn't influence // SPI operations). pinMode(SCK, OUTPUT); pinMode(MOSI, OUTPUT); pinMode(SS, OUTPUT); digitalWrite(SCK, LOW); digitalWrite(MOSI, LOW); digitalWrite(SS, HIGH); // Warning: if the CS pin ever becomes a LOW INPUT then SPI // automatically switches to Slave, so the data direction of // the CS pin MUST be kept as OUTPUT. SPCR |= _BV(MSTR); SPCR |= _BV(SPE); //set clock divider SPCR = (SPCR & ~SPI_CLOCK_MASK) | (SPI_CLOCK_DIV16 & SPI_CLOCK_MASK); // Divides 16MHz clock by 16 to set CLK speed to 1MHz SPSR = (SPSR & ~SPI_2XCLOCK_MASK) | ((SPI_CLOCK_DIV16 >> 2) & SPI_2XCLOCK_MASK); // Divides 16MHz clock by 16 to set CLK speed to 1MHz //set data mode SPCR = (SPCR & ~SPI_MODE_MASK) | SPI_DATA_MODE; //clock polarity = 0; clock phase = 1 (pg. 8) //set bit order SPCR &= ~(_BV(DORD)); ////SPI data format is MSB (pg. 25) // **** ----- End of SPI Setup ----- **** // // initalize the data ready and chip select pins: DRDY = _DRDY; CS = _CS; pinMode(DRDY, INPUT); pinMode(CS, OUTPUT); tCLK = 0.000666; //666 ns (Datasheet, pg. 8) outputCount = 0; } //System Commands void ADS1299::WAKEUP() { digitalWrite(CS, LOW); //Low to communicate transfer(_WAKEUP); digitalWrite(CS, HIGH); //High to end communication delay(4.0*tCLK); //must way at least 4 tCLK cycles before sending another command (Datasheet, pg. 35) } void ADS1299::STANDBY() { digitalWrite(CS, LOW); transfer(_STANDBY); digitalWrite(CS, HIGH); } void ADS1299::RESET() { digitalWrite(CS, LOW); transfer(_RESET); delay(10); // delay(18.0*tCLK); //must wait 18 tCLK cycles to execute this command (Datasheet, pg. 35) digitalWrite(CS, HIGH); } void ADS1299::START() { digitalWrite(CS, LOW); transfer(_START); digitalWrite(CS, HIGH); } void ADS1299::STOP() { digitalWrite(CS, LOW); transfer(_STOP); digitalWrite(CS, HIGH); } //Data Read Commands void ADS1299::RDATAC() { digitalWrite(CS, LOW); transfer(_RDATAC); digitalWrite(CS, HIGH); } void ADS1299::SDATAC() { digitalWrite(CS, LOW); transfer(_SDATAC); digitalWrite(CS, HIGH); } void ADS1299::RDATA() { digitalWrite(CS, LOW); transfer(_RDATA); digitalWrite(CS, HIGH); } //Register Read/Write Commands void ADS1299::getDeviceID() { digitalWrite(CS, LOW); //Low to communicated transfer(_SDATAC); //SDATAC transfer(_RREG); //RREG transfer(0x00); //Asking for 1 byte byte data = transfer(0x00); // byte to read (hopefully 0b???11110) transfer(_RDATAC); //turn read data continuous back on digitalWrite(CS, HIGH); //Low to communicated Serial.println(data, BIN); } void ADS1299::RREG(byte _address) { byte opcode1 = _RREG + _address; //001rrrrr; _RREG = 00100000 and _address = rrrrr digitalWrite(CS, LOW); //Low to communicated transfer(_SDATAC); //SDATAC transfer(opcode1); //RREG transfer(0x00); //opcode2 byte data = transfer(0x00); // returned byte should match default of register map unless edited manually (Datasheet, pg.39) printRegisterName(_address); Serial.print("0x"); if(_address<16) Serial.print("0"); Serial.print(_address, HEX); Serial.print(", "); Serial.print("0x"); if(data<16) Serial.print("0"); Serial.print(data, HEX); Serial.print(", "); for(byte j = 0; j<8; j++){ Serial.print(bitRead(data, 7-j), BIN); if(j!=7) Serial.print(", "); } transfer(_RDATAC); //turn read data continuous back on digitalWrite(CS, HIGH); //High to end communication Serial.println(); } void ADS1299::RREG(byte _address, byte _numRegistersMinusOne) { byte opcode1 = _RREG + _address; //001rrrrr; _RREG = 00100000 and _address = rrrrr digitalWrite(CS, LOW); //Low to communicated transfer(_SDATAC); //SDATAC transfer(opcode1); //RREG transfer(_numRegistersMinusOne); //opcode2 for(byte i = 0; i <= _numRegistersMinusOne; i++){ byte data = transfer(0x00); // returned byte should match default of register map unless previously edited manually (Datasheet, pg.39) printRegisterName(i); Serial.print("0x"); if(i<16) Serial.print("0"); //lead with 0 if value is between 0x00-0x0F to ensure 2 digit format Serial.print(i, HEX); Serial.print(", "); Serial.print("0x"); if(data<16) Serial.print("0"); //lead with 0 if value is between 0x00-0x0F to ensure 2 digit format Serial.print(data, HEX); Serial.print(", "); for(byte j = 0; j<8; j++){ Serial.print(bitRead(data, 7-j), BIN); if(j!=7) Serial.print(", "); } Serial.println(); } transfer(_RDATAC); //turn read data continuous back on digitalWrite(CS, HIGH); //High to end communication } void ADS1299::WREG(byte _address, byte _value) { byte opcode1 = _WREG + _address; //001rrrrr; _RREG = 00100000 and _address = rrrrr digitalWrite(CS, LOW); //Low to communicated transfer(_SDATAC); //SDATAC transfer(opcode1); transfer(0x00); transfer(_value); transfer(_RDATAC); digitalWrite(CS, HIGH); //Low to communicated //Serial.print("Register 0x"); //Serial.print(_address, HEX); //Serial.println(" modified."); } // //void ADS1299::WREG(byte _address, byte _value, byte _numRegistersMinusOne) { // //} void ADS1299::updateData(){ if(digitalRead(DRDY) == LOW){ digitalWrite(CS, LOW); // long output[100][9]; long output[9]; long dataPacket; for(int i = 0; i<9; i++){ for(int j = 0; j<3; j++){ byte dataByte = transfer(0x00); dataPacket = (dataPacket<<8) | dataByte; } // output[outputCount][i] = dataPacket; output[i] = dataPacket; dataPacket = 0; } digitalWrite(CS, HIGH); //Serial.print(outputCount); //Serial.print(", "); for (int i=1;i<7; i++) { Serial.print(output[i]); if(i!=8) Serial.print(", "); } Serial.println(); outputCount++; } } // String-Byte converters for RREG and WREG void ADS1299::printRegisterName(byte _address) { if(_address == ID){ Serial.print("ID, "); } else if(_address == CONFIG1){ Serial.print("CONFIG1, "); } else if(_address == CONFIG2){ Serial.print("CONFIG2, "); } else if(_address == CONFIG3){ Serial.print("CONFIG3, "); } else if(_address == LOFF){ Serial.print("LOFF, "); } else if(_address == CH1SET){ Serial.print("CH1SET, "); } else if(_address == CH2SET){ Serial.print("CH2SET, "); } else if(_address == CH3SET){ Serial.print("CH3SET, "); } else if(_address == CH4SET){ Serial.print("CH4SET, "); } else if(_address == CH5SET){ Serial.print("CH5SET, "); } else if(_address == CH6SET){ Serial.print("CH6SET, "); } else if(_address == CH7SET){ Serial.print("CH7SET, "); } else if(_address == CH8SET){ Serial.print("CH8SET, "); } else if(_address == BIAS_SENSP){ Serial.print("BIAS_SENSP, "); } else if(_address == BIAS_SENSN){ Serial.print("BIAS_SENSN, "); } else if(_address == LOFF_SENSP){ Serial.print("LOFF_SENSP, "); } else if(_address == LOFF_SENSN){ Serial.print("LOFF_