|
|
|
|
import time
|
|
|
|
|
import smbus
|
|
|
|
|
|
|
|
|
|
class DFRobot_AS3935:
|
|
|
|
|
def __init__(self, address, bus = 1):
|
|
|
|
|
self.address = address
|
|
|
|
|
self.i2cbus = smbus.SMBus(bus)
|
|
|
|
|
|
|
|
|
|
def writeByte(self, register, value):
|
|
|
|
|
try:
|
|
|
|
|
self.i2cbus.write_byte_data(self.address, register, value)
|
|
|
|
|
return 1
|
|
|
|
|
except:
|
|
|
|
|
return 0
|
|
|
|
|
|
|
|
|
|
def readData(self, register):
|
|
|
|
|
self.register = self.i2cbus.read_i2c_block_data(self.address, register)
|
|
|
|
|
|
|
|
|
|
def manualCal(self, capacitance, location, disturber):
|
|
|
|
|
self.powerUp()
|
|
|
|
|
if location == 1:
|
|
|
|
|
self.setIndoors()
|
|
|
|
|
else:
|
|
|
|
|
self.setOutdoors()
|
|
|
|
|
|
|
|
|
|
if disturber == 0:
|
|
|
|
|
self.disturberDis()
|
|
|
|
|
else:
|
|
|
|
|
self.disturberEn()
|
|
|
|
|
|
|
|
|
|
self.setIrqOutputSource(0)
|
|
|
|
|
time.sleep(0.5)
|
|
|
|
|
self.setTuningCaps(capacitance)
|
|
|
|
|
|
|
|
|
|
def setTuningCaps(self, capVal):
|
|
|
|
|
#Assume only numbers divisible by 8 (because that's all the chip supports)
|
|
|
|
|
if capVal > 120: #cap_value out of range, assume highest capacitance
|
|
|
|
|
self.singRegWrite(0x08, 0x0F, 0x0F) #set capacitance bits to maximum
|
|
|
|
|
else:
|
|
|
|
|
self.singRegWrite(0x08, 0x0F, capVal >> 3) #set capacitance bits
|
|
|
|
|
|
|
|
|
|
self.singRegRead(0x08)
|
|
|
|
|
#print('capacitance set to 8x%d'%(self.register[0] & 0x0F))
|
|
|
|
|
|
|
|
|
|
def powerUp(self):
|
|
|
|
|
#register 0x00, PWD bit: 0 (clears PWD)
|
|
|
|
|
self.singRegWrite(0x00, 0x01, 0x00)
|
|
|
|
|
self.calRCO() #run RCO cal cmd
|
|
|
|
|
self.singRegWrite(0x08, 0x20, 0x20) #set DISP_SRCO to 1
|
|
|
|
|
time.sleep(0.002)
|
|
|
|
|
self.singRegWrite(0x08, 0x20, 0x00) #set DISP_SRCO to 0
|
|
|
|
|
|
|
|
|
|
def powerDown(self):
|
|
|
|
|
#register 0x00, PWD bit: 0 (sets PWD)
|
|
|
|
|
self.singRegWrite(0x00, 0x01, 0x01)
|
|
|
|
|
|
|
|
|
|
def calRCO(self):
|
|
|
|
|
self.writeByte(0x3D, 0x96)
|
|
|
|
|
time.sleep(0.002)
|
|
|
|
|
|
|
|
|
|
def setIndoors(self):
|
|
|
|
|
self.singRegWrite(0x00, 0x3E, 0x24)
|
|
|
|
|
print("set to indoors model")
|
|
|
|
|
|
|
|
|
|
def setOutdoors(self):
|
|
|
|
|
self.singRegWrite(0x00, 0x3E, 0x1C)
|
|
|
|
|
print("set to outdoors model")
|
|
|
|
|
|
|
|
|
|
def disturberDis(self):
|
|
|
|
|
#register 0x03, PWD bit: 5 (sets MASK_DIST)
|
|
|
|
|
self.singRegWrite(0x03, 0x20, 0x20)
|
|
|
|
|
print("disenable disturber detection")
|
|
|
|
|
|
|
|
|
|
def disturberEn(self):
|
|
|
|
|
#register 0x03, PWD bit: 5 (sets MASK_DIST)
|
|
|
|
|
self.singRegWrite(0x03, 0x20, 0x00)
|
|
|
|
|
print("enable disturber detection")
|
|
|
|
|
|
|
|
|
|
def singRegWrite(self, regAdd, dataMask, regData):
|
|
|
|
|
#start by reading original register data (only modifying what we need to)
|
|
|
|
|
self.singRegRead(regAdd)
|
|
|
|
|
#calculate new register data... 'delete' old targeted data, replace with new data
|
|
|
|
|
#note: 'dataMask' must be bits targeted for replacement
|
|
|
|
|
#add'l note: this function does NOT shift values into the proper place... they need to be there already
|
|
|
|
|
newRegData = (self.register[0] & ~dataMask)|(regData & dataMask)
|
|
|
|
|
#finally, write the data to the register
|
|
|
|
|
self.writeByte(regAdd, newRegData)
|
|
|
|
|
#print('wrt: %02x'%newRegData)
|
|
|
|
|
self.singRegRead(regAdd)
|
|
|
|
|
#print('Act: %02x'%self.register[0])
|
|
|
|
|
|
|
|
|
|
def singRegRead(self,regAdd):
|
|
|
|
|
self.readData(regAdd)
|
|
|
|
|
|
|
|
|
|
def getInterruptSrc(self):
|
|
|
|
|
#definition of interrupt data on table 18 of datasheet
|
|
|
|
|
#for this function:
|
|
|
|
|
#0 = unknown src, 1 = lightning detected, 2 = disturber, 3 = Noise level too high
|
|
|
|
|
time.sleep(0.03) #wait 3ms before reading (min 2ms per pg 22 of datasheet)
|
|
|
|
|
self.singRegRead(0x03) #read register, get rid of non-interrupt data
|
|
|
|
|
intSrc = self.register[0]&0x0F
|
|
|
|
|
if intSrc == 0x08:
|
|
|
|
|
return 1 #lightning caused interrupt
|
|
|
|
|
elif intSrc == 0x04:
|
|
|
|
|
return 2 #disturber detected
|
|
|
|
|
elif intSrc == 0x01:
|
|
|
|
|
return 3 #Noise level too high
|
|
|
|
|
else:
|
|
|
|
|
return 0 #interrupt result not expected
|
|
|
|
|
|
|
|
|
|
def reset(self):
|
|
|
|
|
err = self.writeByte(0x3C, 0x96)
|
|
|
|
|
time.sleep(0.002) #wait 2ms to complete
|
|
|
|
|
return err
|
|
|
|
|
|
|
|
|
|
def setLcoFdiv(self,fdiv):
|
|
|
|
|
self.singRegWrite(0x03, 0xC0, (fdiv & 0x03) << 6)
|
|
|
|
|
|
|
|
|
|
def setIrqOutputSource(self, irqSelect):
|
|
|
|
|
#set interrupt source - what to display on IRQ pin
|
|
|
|
|
#reg 0x08, bits 5 (TRCO), 6 (SRCO), 7 (LCO)
|
|
|
|
|
#only one should be set at once, I think
|
|
|
|
|
#0 = NONE, 1 = TRCO, 2 = SRCO, 3 = LCO
|
|
|
|
|
if irqSelect == 1:
|
|
|
|
|
self.singRegWrite(0x08, 0xE0, 0x20) #set only TRCO bit
|
|
|
|
|
elif irqSelect == 2:
|
|
|
|
|
self.singRegWrite(0x08, 0xE0, 0x40) #set only SRCO bit
|
|
|
|
|
elif irqSelect == 3:
|
|
|
|
|
self.singRegWrite(0x08, 0xE0, 0x80) #set only SRCO bit
|
|
|
|
|
else:
|
|
|
|
|
self.singRegWrite(0x08, 0xE0, 0x00) #clear IRQ pin display bits
|
|
|
|
|
|
|
|
|
|
def getLightningDistKm(self):
|
|
|
|
|
self.singRegRead(0x07) #read register, get rid of non-distance data
|
|
|
|
|
return self.register[0]&0x3F
|
|
|
|
|
|
|
|
|
|
def getStrikeEnergyRaw(self):
|
|
|
|
|
self.singRegRead(0x06) #MMSB, shift 8 bits left, make room for MSB
|
|
|
|
|
nrgyRaw = (self.register[0]&0x1F) << 8
|
|
|
|
|
self.singRegRead(0x05) #read MSB
|
|
|
|
|
nrgyRaw |= self.register[0]
|
|
|
|
|
nrgyRaw <<= 8 #shift 8 bits left, make room for LSB
|
|
|
|
|
self.singRegRead(0x04) #read LSB, add to others
|
|
|
|
|
nrgyRaw |= self.register[0]
|
|
|
|
|
|
|
|
|
|
return nrgyRaw/16777
|
|
|
|
|
|
|
|
|
|
def setMinStrikes(self, minStrk):
|
|
|
|
|
#This function sets min strikes to the closest available number, rounding to the floor,
|
|
|
|
|
#where necessary, then returns the physical value that was set. Options are 1, 5, 9 or 16 strikes.
|
|
|
|
|
if minStrk < 5:
|
|
|
|
|
self.singRegWrite(0x02, 0x30, 0x00)
|
|
|
|
|
return 1
|
|
|
|
|
elif minStrk < 9:
|
|
|
|
|
self.singRegWrite(0x02, 0x30, 0x10)
|
|
|
|
|
return 5
|
|
|
|
|
elif minStrk < 16:
|
|
|
|
|
self.singRegWrite(0x02, 0x30, 0x20)
|
|
|
|
|
return 9
|
|
|
|
|
else:
|
|
|
|
|
self.singRegWrite(0x02, 0x30, 0x30)
|
|
|
|
|
return 16
|
|
|
|
|
|
|
|
|
|
def clearStatistics(self):
|
|
|
|
|
#clear is accomplished by toggling CL_STAT bit 'high-low-high' (then set low to move on)
|
|
|
|
|
self.singRegWrite(0x02, 0x40, 0x40) #high
|
|
|
|
|
self.singRegWrite(0x02, 0x40, 0x00) #low
|
|
|
|
|
self.singRegWrite(0x02, 0x40, 0x40) #high
|
|
|
|
|
|
|
|
|
|
def getNoiseFloorLv1(self):
|
|
|
|
|
#NF settings addres 0x01, bits 6:4
|
|
|
|
|
#default setting of 010 at startup (datasheet, table 9)
|
|
|
|
|
self.singRegRead(0x01) #read register 0x01
|
|
|
|
|
return (self.register[0] & 0x70) >> 4 #should return value from 0-7, see table 16 for info
|
|
|
|
|
|
|
|
|
|
def setNoiseFloorLv1(self, nfSel):
|
|
|
|
|
#NF settings addres 0x01, bits 6:4
|
|
|
|
|
#default setting of 010 at startup (datasheet, table 9)
|
|
|
|
|
if nfSel <= 7: #nfSel within expected range
|
|
|
|
|
self.singRegWrite(0x01, 0x70, (nfSel & 0x07) << 4)
|
|
|
|
|
else: #out of range, set to default (power-up value 010)
|
|
|
|
|
self.singRegWrite(0x01, 0x70, 0x20)
|
|
|
|
|
|
|
|
|
|
def getWatchdogThreshold(self):
|
|
|
|
|
#This function is used to read WDTH. It is used to increase robustness to disturbers,
|
|
|
|
|
#though will make detection less efficient (see page 19, Fig 20 of datasheet)
|
|
|
|
|
#WDTH register: add 0x01, bits 3:0
|
|
|
|
|
#default value of 0010
|
|
|
|
|
#values should only be between 0x00 and 0x0F (0 and 7)
|
|
|
|
|
self.singRegRead(0x01)
|
|
|
|
|
return self.register[0] & 0x0F
|
|
|
|
|
|
|
|
|
|
def setWatchdogThreshold(self, wdth):
|
|
|
|
|
#This function is used to modify WDTH. It is used to increase robustness to disturbers,
|
|
|
|
|
#though will make detection less efficient (see page 19, Fig 20 of datasheet)
|
|
|
|
|
#WDTH register: add 0x01, bits 3:0
|
|
|
|
|
#default value of 0010
|
|
|
|
|
#values should only be between 0x00 and 0x0F (0 and 7)
|
|
|
|
|
self.singRegWrite(0x01, 0x0F, wdth & 0x0F)
|
|
|
|
|
|
|
|
|
|
def getSpikeRejection(self):
|
|
|
|
|
#This function is used to read SREJ (spike rejection). Similar to the Watchdog threshold,
|
|
|
|
|
#it is used to make the system more robust to disturbers, though will make general detection
|
|
|
|
|
#less efficient (see page 20-21, especially Fig 21 of datasheet)
|
|
|
|
|
#SREJ register: add 0x02, bits 3:0
|
|
|
|
|
#default value of 0010
|
|
|
|
|
#values should only be between 0x00 and 0x0F (0 and 7)
|
|
|
|
|
self.singRegRead(0x02)
|
|
|
|
|
return self.register[0] & 0x0F
|
|
|
|
|
|
|
|
|
|
def setSpikeRejection(self, srej):
|
|
|
|
|
#This function is used to modify SREJ (spike rejection). Similar to the Watchdog threshold,
|
|
|
|
|
#it is used to make the system more robust to disturbers, though will make general detection
|
|
|
|
|
#less efficient (see page 20-21, especially Fig 21 of datasheet)
|
|
|
|
|
#WDTH register: add 0x02, bits 3:0
|
|
|
|
|
#default value of 0010
|
|
|
|
|
#values should only be between 0x00 and 0x0F (0 and 7)
|
|
|
|
|
self.singRegWrite(0x02, 0x0F, srej & 0x0F)
|
|
|
|
|
|
|
|
|
|
def printAllRegs(self):
|
|
|
|
|
self.singRegRead(0x00)
|
|
|
|
|
print("Reg 0x00: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x01)
|
|
|
|
|
print("Reg 0x01: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x02)
|
|
|
|
|
print("Reg 0x02: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x03)
|
|
|
|
|
print("Reg 0x03: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x04)
|
|
|
|
|
print("Reg 0x04: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x05)
|
|
|
|
|
print("Reg 0x05: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x06)
|
|
|
|
|
print("Reg 0x06: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x07)
|
|
|
|
|
print("Reg 0x07: %02x"%self.register[0])
|
|
|
|
|
self.singRegRead(0x08)
|
|
|
|
|
print("Reg 0x08: %02x"%self.register[0])
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
