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369 lines
10 KiB
369 lines
10 KiB
#include "DFRobot_AS3935_I2c.h"
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DFRobot_AS3935_I2C::DFRobot_AS3935_I2C(uint8_t irqx, uint8_t devAddx)
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{
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devAdd = devAddx;
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irq = irqx;
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// initalize the IRQ pins
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pinMode(irq, INPUT);
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}
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void DFRobot_AS3935_I2C::AS3935SetI2CAddress(uint8_t devAddx)
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{
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if (devAddx == AS3935_ADD1)
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{
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devAdd = devAddx;
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}
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else if (devAddx == AS3935_ADD2)
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{
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devAdd = devAddx;
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}
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else
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{
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devAdd = AS3935_ADD3;
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}
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}
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uint8_t DFRobot_AS3935_I2C::singRegRead(uint8_t regAdd)
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{
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// I2C address Register address num bytes
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I2c.read((uint8_t)devAdd, (uint8_t)regAdd, (uint8_t)0x01); // Use I2C library to read register
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uint8_t regData = I2c.receive(); // receive the I2C data
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return regData;
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}
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void DFRobot_AS3935_I2C::singRegWrite(uint8_t regAdd, uint8_t dataMask, uint8_t regData)
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{
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// start by reading original register data (only modifying what we need to)
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uint8_t origRegData = singRegRead(regAdd);
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// calculate new register data... 'delete' old targeted data, replace with new data
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// note: 'DataMask' must be bits targeted for replacement
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// add'l note: this function does NOT shift values into the proper place... they need to be there already
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uint8_t newRegData = ((origRegData & ~dataMask) | (regData & dataMask));
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// finally, write the data to the register
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I2c.write(devAdd, regAdd, newRegData);
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Serial.print("wrt: ");
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Serial.print(newRegData,HEX);
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Serial.print(" Act: ");
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Serial.println(singRegRead(regAdd),HEX);
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}
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void DFRobot_AS3935_I2C::AS3935DefInit()
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{
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AS3935Reset(); // reset registers to default
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}
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void DFRobot_AS3935_I2C::AS3935Reset()
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{
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// run PRESET_DEFAULT Direct Command to set all registers in default state
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I2c.write(devAdd, (uint8_t)0x3C, (uint8_t)0x96);
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delay(2); // wait 2ms to complete
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}
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void DFRobot_AS3935_I2C::calRCO()
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{
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// run ALIB_RCO Direct Command to cal internal RCO
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I2c.write(devAdd, (uint8_t)0x3D, (uint8_t)0x96);
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delay(2); // wait 2ms to complete
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}
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void DFRobot_AS3935_I2C::AS3935PowerUp(void)
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{
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// power-up sequence based on datasheet, pg 23/27
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// register 0x00, PWD bit: 0 (clears PWD)
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singRegWrite(0x00, 0x01, 0x00);
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calRCO(); // run RCO cal cmd
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singRegWrite(0x08, 0x20, 0x20); // set DISP_SRCO to 1
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delay(2);
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singRegWrite(0x08, 0x20, 0x00); // set DISP_SRCO to 0
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}
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void DFRobot_AS3935_I2C::AS3935PowerDown(void)
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{
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// register 0x00, PWD bit: 0 (sets PWD)
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singRegWrite(0x00, 0x01, 0x01);
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Serial.println("AS3935 powered down");
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}
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void DFRobot_AS3935_I2C::AS3935DisturberEn(void)
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{
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// register 0x03, PWD bit: 5 (sets MASK_DIST)
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singRegWrite(0x03, 0x20, 0x00);
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Serial.println("disturber detection enabled");
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}
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void DFRobot_AS3935_I2C::AS3935DisturberDis(void)
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{
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// register 0x03, PWD bit: 5 (sets MASK_DIST)
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singRegWrite(0x03, 0x20, 0x20);
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}
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void DFRobot_AS3935_I2C::AS3935SetIRQOutputSource(uint8_t irqSelect)
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{
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// set interrupt source - what to display on IRQ pin
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// reg 0x08, bits 5 (TRCO), 6 (SRCO), 7 (LCO)
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// only one should be set at once, I think
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// 0 = NONE, 1 = TRCO, 2 = SRCO, 3 = LCO
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if(1 == irqSelect)
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{
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singRegWrite(0x08, 0xE0, 0x20); // set only TRCO bit
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}
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else if(2 == irqSelect)
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{
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singRegWrite(0x08, 0xE0, 0x40); // set only SRCO bit
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}
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else if(3 == irqSelect)
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{
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singRegWrite(0x08, 0xE0, 0x80); // set only LCO bit
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}
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else // assume 0
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{
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singRegWrite(0x08, 0xE0, 0x00); // clear IRQ pin display bits
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}
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}
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void DFRobot_AS3935_I2C::AS3935SetTuningCaps(uint8_t capVal)
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{
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// Assume only numbers divisible by 8 (because that's all the chip supports)
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if(120 < capVal) // cap_value out of range, assume highest capacitance
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{
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singRegWrite(0x08, 0x0F, 0x0F); // set capacitance bits to maximum
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}
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else
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{
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singRegWrite(0x08, 0x0F, (capVal >> 3)); // set capacitance bits
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}
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Serial.print("capacitance set to 8x");
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Serial.println((singRegRead(0x08) & 0x0F));
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}
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uint8_t DFRobot_AS3935_I2C::AS3935GetInterruptSrc(void)
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{
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// definition of interrupt data on table 18 of datasheet
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// for this function:
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// 0 = unknown src, 1 = lightning detected, 2 = disturber, 3 = Noise level too high
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delay(10); // wait 3ms before reading (min 2ms per pg 22 of datasheet)
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uint8_t intSrc = (singRegRead(0x03) & 0x0F); // read register, get rid of non-interrupt data
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if(0x08 == intSrc)
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{
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return 1; // lightning caused interrupt
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}
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else if(0x04 == intSrc)
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{
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return 2; // disturber detected
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}
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else if(0x01 == intSrc)
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{
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return 3; // Noise level too high
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}
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else{return 0;} // interrupt result not expected
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}
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uint8_t DFRobot_AS3935_I2C::AS3935GetLightningDistKm(void)
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{
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uint8_t strikeDist = (singRegRead(0x07) & 0x3F); // read register, get rid of non-distance data
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return strikeDist;
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}
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uint32_t DFRobot_AS3935_I2C::AS3935GetStrikeEnergyRaw(void)
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{
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uint32_t nrgyRaw = ((singRegRead(0x06) & 0x1F) << 8); // MMSB, shift 8 bits left, make room for MSB
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nrgyRaw |= singRegRead(0x05); // read MSB
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nrgyRaw <<= 8; // shift 8 bits left, make room for LSB
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nrgyRaw |= singRegRead(0x04); // read LSB, add to others
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return nrgyRaw/16777;
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}
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uint8_t DFRobot_AS3935_I2C::AS3935SetMinStrikes(uint8_t minStrk)
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{
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// This function sets min strikes to the closest available number, rounding to the floor,
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// where necessary, then returns the physical value that was set. Options are 1, 5, 9 or 16 strikes.
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// see pg 22 of the datasheet for more info (#strikes in 17 min)
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if(5 > minStrk)
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{
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singRegWrite(0x02, 0x30, 0x00);
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return 1;
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}
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else if(9 > minStrk)
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{
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singRegWrite(0x02, 0x30, 0x10);
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return 5;
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}
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else if(16 > minStrk)
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{
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singRegWrite(0x02, 0x30, 0x20);
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return 9;
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}
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else
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{
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singRegWrite(0x02, 0x30, 0x30);
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return 16;
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}
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}
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void DFRobot_AS3935_I2C::AS3935SetIndoors(void)
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{
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// AFE settings addres 0x00, bits 5:1 (10010, based on datasheet, pg 19, table 15)
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// this is the default setting at power-up (AS3935 datasheet, table 9)
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singRegWrite(0x00, 0x3E, 0x24);
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Serial.println("set up for indoor operation");
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}
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void DFRobot_AS3935_I2C::AS3935SetOutdoors(void)
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{
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// AFE settings addres 0x00, bits 5:1 (01110, based on datasheet, pg 19, table 15)
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singRegWrite(0x00, 0x3E, 0x1C);
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Serial.println("set up for outdoor operation");
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}
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void DFRobot_AS3935_I2C::AS3935ClearStatistics(void)
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{
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// clear is accomplished by toggling CL_STAT bit 'high-low-high' (then set low to move on)
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singRegWrite(0x02, 0x40, 0x40); // high
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singRegWrite(0x02, 0x40, 0x00); // low
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singRegWrite(0x02, 0x40, 0x40); // high
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}
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uint8_t DFRobot_AS3935_I2C::AS3935GetNoiseFloorLvl(void)
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{
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// NF settings addres 0x01, bits 6:4
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// default setting of 010 at startup (datasheet, table 9)
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uint8_t regRaw = singRegRead(0x01); // read register 0x01
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return ((regRaw & 0x70) >> 4); // should return value from 0-7, see table 16 for info
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}
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void DFRobot_AS3935_I2C::AS3935SetNoiseFloorLvl(uint8_t nfSel)
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{
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// NF settings addres 0x01, bits 6:4
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// default setting of 010 at startup (datasheet, table 9)
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if(7 >= nfSel) // nf_sel within expected range
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{
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singRegWrite(0x01, 0x70, ((nfSel & 0x07) << 4));
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}
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else
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{ // out of range, set to default (power-up value 010)
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singRegWrite(0x01, 0x70, 0x20);
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}
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}
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uint8_t DFRobot_AS3935_I2C::AS3935GetWatchdogThreshold(void)
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{
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// This function is used to read WDTH. It is used to increase robustness to disturbers,
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// though will make detection less efficient (see page 19, Fig 20 of datasheet)
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// WDTH register: add 0x01, bits 3:0
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// default value of 0001
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// values should only be between 0x00 and 0x0F (0 and 7)
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uint8_t regRaw = singRegRead(0x01);
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return (regRaw & 0x0F);
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}
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void DFRobot_AS3935_I2C::AS3935SetWatchdogThreshold(uint8_t wdth)
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{
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// This function is used to modify WDTH. It is used to increase robustness to disturbers,
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// though will make detection less efficient (see page 19, Fig 20 of datasheet)
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// WDTH register: add 0x01, bits 3:0
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// default value of 0001
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// values should only be between 0x00 and 0x0F (0 and 7)
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singRegWrite(0x01, 0x0F, (wdth & 0x0F));
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}
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uint8_t DFRobot_AS3935_I2C::AS3935GetSpikeRejection(void)
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{
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// This function is used to read SREJ (spike rejection). Similar to the Watchdog threshold,
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// it is used to make the system more robust to disturbers, though will make general detection
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// less efficient (see page 20-21, especially Fig 21 of datasheet)
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// SREJ register: add 0x02, bits 3:0
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// default value of 0010
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// values should only be between 0x00 and 0x0F (0 and 7)
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uint8_t regRaw = singRegRead(0x02);
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return (regRaw & 0x0F);
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}
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void DFRobot_AS3935_I2C::AS3935SetSpikeRejection(uint8_t srej)
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{
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// This function is used to modify SREJ (spike rejection). Similar to the Watchdog threshold,
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// it is used to make the system more robust to disturbers, though will make general detection
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// less efficient (see page 20-21, especially Fig 21 of datasheet)
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// WDTH register: add 0x02, bits 3:0
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// default value of 0010
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// values should only be between 0x00 and 0x0F (0 and 7)
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singRegWrite(0x02, 0x0F, (srej & 0x0F));
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}
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void DFRobot_AS3935_I2C::AS3935SetLcoFdiv(uint8_t fdiv)
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{
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// This function sets LCO_FDIV register. This is useful in the tuning of the antenna
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// LCO_FDIV register: add 0x03, bits 7:6
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// default value: 00
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// set 0, 1, 2 or 3 for ratios of 16, 32, 64 and 128, respectively.
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// See pg 23, Table 20 for more info.
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singRegWrite(0x03, 0xC0, ((fdiv & 0x03) << 6));
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}
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void DFRobot_AS3935_I2C::AS3935PrintAllRegs(void)
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{
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Serial.print("Reg 0x00: ");
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Serial.println(singRegRead(0x00));
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Serial.print("Reg 0x01: ");
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Serial.println(singRegRead(0x01));
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Serial.print("Reg 0x02: ");
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Serial.println(singRegRead(0x02));
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Serial.print("Reg 0x03: ");
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Serial.println(singRegRead(0x03));
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Serial.print("Reg 0x04: ");
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Serial.println(singRegRead(0x04));
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Serial.print("Reg 0x05: ");
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Serial.println(singRegRead(0x05));
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Serial.print("Reg 0x06: ");
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Serial.println(singRegRead(0x06));
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Serial.print("Reg 0x07: ");
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Serial.println(singRegRead(0x07));
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Serial.print("Reg 0x08: ");
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Serial.println(singRegRead(0x08));
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uint32_t nrgyVal = AS3935GetStrikeEnergyRaw();
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Serial.println(nrgyVal);
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}
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void DFRobot_AS3935_I2C::AS3935ManualCal(uint8_t capacitance, uint8_t location, uint8_t disturber)
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{
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// start by powering up
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AS3935PowerUp();
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// indoors/outdoors next...
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if(1 == location) // set outdoors if 1
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{
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AS3935SetOutdoors();
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}
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else // set indoors if anything but 1
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{
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AS3935SetIndoors();
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}
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// disturber cal
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if(0 == disturber) // disabled if 0
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{
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AS3935DisturberDis();
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}
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else // enabled if anything but 0
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{
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AS3935DisturberEn();
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}
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AS3935SetIRQOutputSource(0);
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delay(500);
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// capacitance first... directly write value here
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AS3935SetTuningCaps(capacitance);
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Serial.println("AS3935 manual cal complete");
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}
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// a nice function would be to read the last 'x' strike data values....
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