![]() This RPS (regulated power supply) provides the power to the microcontroller as well as other components which are used over the Arduino mega board. Do not call again until you need to recheck for triggered actionsīyte interrupts = adxl. These pins are used for providing o/p regulated voltage approximately 5V. getInterruptSource clears all triggered actions after returning value * Look for Interrupts and Triggered Action */ This may come in handy when it doesn't matter when the action occurs. You may also choose to avoid using interrupts and simply run the functions within ADXL_ISR() * UNCOMMENT TO VIEW X Y Z ACCELEROMETER VALUES */ * Accelerometer Readings and Interrupt */Īdxl.readAccel(&x, &y, &z) // Read the accelerometer values and store them in variables declared above x,y,z attachInterrupt(digitalPinToInterrupt(interruptPin), ADXL_ISR, RISING) // Attach Interrupt Turn on Interrupts for each mode (1 = ON, 0 = OFF) This library may have a problem using INT2 pin. This chooses the pin on the ADX元45 to use for Interrupts. Accepts only 1 or 2 values for pins INT1 and INT2. tImportantInterruptMapping(1, 1, 1, 1, 1) // Sets "tEveryInterruptMapping(single tap, double tap, free fall, activity, inactivity) " Setting all interupts to take place on INT1 pin Set values for what is considered FREE FALL (0-255)Īdxl.setFreeFallThreshold(7) // (5 - 9) recommended - 62.5mg per incrementĪdxl.setFreeFallDuration(30) // (20 - 70) recommended - 5ms per increment Set values for what is considered a TAP and what is a DOUBLE TAP (0-255)Īdxl.setTapThreshold(50) // 62.5 mg per incrementĪdxl.setTapDuration(15) // 625 μs per incrementĪdxl.setDoubleTapLatency(80) // 1.25 ms per incrementĪdxl.setDoubleTapWindow(200) // 1.25 ms per increment SPI pins on the ATMega328: 11, 12 and 13 as reference in SPI LibraryĪdxl.setActivityXYZ(1, 0, 0) // Set to activate movement detection in the axes "tActivityXYZ(X, Y, Z) " (1 = ON, 0 = OFF)Īdxl.setActivityThreshold(75) // 62.5mg per increment // Set activity // Inactivity thresholds (0-255)Īdxl.setInactivityXYZ(1, 0, 0) // Set to detect inactivity in all the axes "tInactivityXYZ(X, Y, Z) " (1 = ON, 0 = OFF)Īdxl.setInactivityThreshold(75) // 62.5mg per increment // Set inactivity // Inactivity thresholds (0-255)Īdxl.setTimeInactivity(10) // How many seconds of no activity is inactive?Īdxl.setTapDetectionOnXYZ(0, 0, 1) // Detect taps in the directions turned ON "tTapDetectionOnX(X, Y, Z) " (1 = ON, 0 = OFF) ![]() Higher Values = Wider Measurement RangeĪdxl.setSpiBit(0) // Configure the device to be in 4 wire SPI mode when set to '0' or 3 wire SPI mode when set to 1 Serial.println("SparkFun ADX元45 Accelerometer Hook Up Guide Example") Īdxl.setRangeSetting(16) // Give the range settings Serial.begin(9600) // Start the serial terminal int interruptPin = 2 // Setup pin 2 to be the interrupt pin (for most Arduino Boards) ADX元45 adxl = ADX元45() // USE FOR I2C COMMUNICATION * Comment Out The One You Are Not Using */ĪDX元45 adxl = ADX元45(19) // USE FOR SPI COMMUNICATION, ADX元45(CS_PIN) * Bildr ADX元45 source file modified to support * Triple Axis Accelerometer Breakout - ADX元45 I am not sure if my hardware/pin connection is right or if there anything else needed to be done. I still get output as 0,0,0 in my serial monitor for x,y and z measurements. I have not changed the code except for changing the CS pin number. I have used the code from SparkFun ADX元45 Library. The pins are connected according to the following way. I have tried with 4 wire connection as shown in ADX元45 Hookup Guide - SparkFun Learn document. I want to connect them in SPI communication method. However I don't recall reading in AVR mega datasheets about their recommendations for unused input pins, probably because it doesn't lead to device failures, just possible faulty hardware logic/software symptoms.Hi, I am currently use Arduino Mega 2560 board and accelerometer ADX元45( ). ![]() Then when pure CMOS logic chips started becoming popular in the 70s and beyond a lot of us learned first hand what happens if you allowed 'floating inputs' on the earlier CMOS chip designs, which was chip self oscillation and very hot running and even burning up the chip and a few of my finger tips at the time.īottom line, be sure to review the specific datasheet of any logic chip you are using as to how to handle unused input pins. To the best of my memory these earlier TTL families had unconnected inputs pulled up HIGH internally but good design practice would wire all unused inputs to either of the power rails as required. I worked (field troubleshooting) with a whole lot of TTL, 74xx, 74LSxx, 74Hxx, 74Sxx in the 70s and 80s. Not like older TTL inputs, which generally could be relied on to be a low if left unconnected.
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