MCUdude
commented
6 years ago What happens if you just comment out everything that has to do with the WDT; does it still reset itself? I suspect this might be a power related issue (the radio causes the voltage to drop below 2.7V, and the ATmega644 resets itself). Do you power our ATmega644 from 5V or 3.3V?
Please add the following line right after Serial1.begin
DEBUGln(MCUSR);The MCUSR register contains the reset flags. By reading this register you're able to determine what caused the microcontroller to reset itself.
JensGrabner
pklg
Hi All. Now I am designing project with using Atmega 644p (8MYz), Arduino IDE 1.6.8. After writting of bootloader in an controller is done the Led blinks twice with period one second. After loading os sketch in an controller it teboots every 200ms. It seems that WDT have default setting 200ms. I tried in setup() configure WDT like wdt_enable(WDTO_8S);, but this not helped. This setup(): `void setup() { wdt_enable(WDTO_8S); while (!Serial1); // wait until serial console is open, remove if not tethered to computer Serial1.begin(SERIAL_BAUD);
DEBUGln("Arduino RFM69HCW Transmitter");
// Hard Reset the RFM module pinMode(RFM69_RST, OUTPUT); digitalWrite(RFM69_RST, HIGH); delay(100); digitalWrite(RFM69_RST, LOW); delay(100);
// Initialize radio radio.initialize(FREQUENCY, NODEID, NETWORKID); if (IS_RFM69HCW) { radio.setHighPower(); // Only for RFM69HCW & HW! Serial1.println("High Power setted"); } radio.setPowerLevel(31); // power output ranges from 0 (5dBm) to 31 (20dBm) Serial1.println("Power setted = 31"); radio.encrypt(ENCRYPTKEY); Serial1.println("Radio is encripted"); ///---Set low bitrate---- radio.writeReg(0x03,0x1A); //4.8kb/s //(0x03,0x68)RegBitrateMsb 1200 bitrate radio.writeReg(0x04,0x0B); //4.8kb/s //(0x04,0x2B)RegBitrateLsb 1200 bitrate radio.writeReg(0x05,0x00); //RegFdevMsb 2000 radio.writeReg(0x06,0x52); //RegFdevLsb 2000 radio.writeReg(0x19,0x40|0x10|0x05); //RegRxBw DccFreq:010, RxBw_Mant:24, RxBw_Exp:5 radio.writeReg(0x18,0x00|0x00|0x01); //RegLna LnaZin:50ohm, LowPower:Off, CurrentGain:MAX //---------------------- /
pinMode(LED, OUTPUT); DEBUG("\nTransmitting at "); DEBUG(FREQUENCY == RF69_433MHZ ? 433 : FREQUENCY == RF69_868MHZ ? 868 : 915); DEBUGln(" MHz");
timer.setInterval(10000, RFM_module); wdt_reset(); }`
This is a piece of the serial output: ` Arduino RFM69HCW Transmitter High Power setted Power se Arduino RFM69HCW Transmitter High Power setted Power se Arduino RFM69HCW Transmitter High Power setted Power se
` What could be causing this behavior? Thank You. Leonid.