avr Programming an ATmega1284p with Arduino IDE and internal RC Oscillator

Program an ATmega1284P using an AVR Dragon and the Arduino IDE. The mighty1284p library has been installed, and after writing the sketch, it is compiled using the Arduino IDE. The compilation process creates a hex file in a temporary directory. The example code provided is a simple LED blink program that turns an LED on for one second and then off for one second repeatedly. The LED is connected to pin 13 on most Arduino boards. The setup routine initializes the digital pin as an output, and the loop routine continuously toggles the LED state with delays. The program has been successfully uploaded, and the microcontroller blinks as intended. The fuses on the ATmega1284P have been set to use the internal RC oscillator and to divide the clock rate by 8, resulting in a 1MHz clock rate, which caused initial confusion due to slow performance. The Arduino IDE now recognizes two new boards: Mighty 1284P 1MHz and Mighty 1284P 8MHz, which utilize the internal clock speeds.

The ATmega1284P microcontroller is a versatile device commonly used in embedded systems. Programming this microcontroller involves using the AVR Dragon programmer in conjunction with the Arduino IDE, which simplifies the development process through its user-friendly interface. The installation of the mighty1284p library allows the IDE to recognize the ATmega1284P and facilitates the selection of different clock speeds via the board manager.

The provided LED blink example serves as an introductory program for testing the setup. The code initializes pin 13 as an output and toggles the LED state with a one-second delay, demonstrating basic control over digital outputs. The use of the `pinMode()` function in the `setup()` routine is essential for configuring the pin as an output, while the `digitalWrite()` function in the `loop()` routine controls the LED state.

In the context of AVR programming, the configuration of fuses is critical as it determines the microcontroller's clock source and speed. Setting the fuses to utilize the internal RC oscillator and dividing the clock rate by 8 results in a 1MHz operational frequency. This configuration can lead to confusion if the expected performance is based on a higher clock rate, such as the default 16MHz.

The Arduino IDE's capability to recognize the Mighty 1284P boards at different clock rates enhances the development experience by allowing users to select the appropriate settings for their applications. The provided bootloader configurations ensure that the microcontroller can be programmed and reset correctly.

In summary, programming the ATmega1284P with the Arduino IDE and AVR Dragon involves understanding the microcontroller's fuse settings, selecting the appropriate board configurations, and writing sketches that leverage the capabilities of the device. The successful execution of the LED blink program confirms that the setup is functioning correctly, paving the way for more complex applications.Program an ATmega1284p with my AVR Dragon and the Arduino IDE. So far I have installed mighty1284p, after writing my sketch. I compile it using the Arduino IDE and then cd into the (temporary) directory the sketch is build in. It contains the. hex file, as seems logic. /* Blink Turns on an LED on for one second, then offfor one second, repeatedly. This example code is in the public domain. */ // Pin 13 has an LED connected on most Arduino boards. // give it a name: int led = 1; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } #include
h> #include #define F_CPU 1000000 int main (void) { DDRB = 0xff; while(1) { PORTB |= (1<
Evey I should have been able to do that math in my head, the clockrate is now 1MHz. mighty1284p in it`s original settings want`s aclockrate of 16MHz, so everything was just sooo slow that I thought it didn`t work at all, when in fact it was just crawling. ############################################################## mighty_opt8. name=Mighty 1284p 8MHz using Optiboot mighty_opt8. upload. protocol=arduino mighty_opt8. upload. maximum_size=130048 mighty_opt8. upload. speed=115200 mighty_opt8. bootloader. low_fuses=0xff mighty_opt8. bootloader. high_fuses=0xde mighty_opt8. bootloader. extended_fuses=0xfd mighty_opt8. bootloader. path=optiboot mighty_opt8. bootloader. file=optiboot_atmega1284p. hex mighty_opt8. bootloader. unlock_bits=0x3F mighty_opt8. bootloader. lock_bits=0x0F mighty_opt8. build. mcu=atmega1284p mighty_opt8. build. f_cpu=8000000L #mighty_opt8. build. core=arduino:arduino mighty_opt8. build. core=standard mighty_opt8. build. variant=standard ############################################################## mighty_opt1. name=Mighty 1284p 1MHz using Optiboot mighty_opt1. upload. protocol=arduino mighty_opt1. upload. maximum_size=130048 mighty_opt1. upload. speed=115200 mighty_opt1. bootloader. low_fuses=0xff mighty_opt1. bootloader. high_fuses=0xde mighty_opt1. bootloader. extended_fuses=0xfd mighty_opt1. bootloader. path=optiboot mighty_opt1. bootloader. file=optiboot_atmega1284p. hex mighty_opt1. bootloader. unlock_bits=0x3F mighty_opt1. bootloader. lock_bits=0x0F mighty_opt1. build. mcu=atmega1284p mighty_opt1. build. f_cpu=1000000L #mighty_opt1. build. core=arduino:arduino mighty_opt1. build. core=standard mighty_opt1. build. variant=standard ############################################################## Now my Arduino IDE has new boards: Mighty 1284p 1MHz using Optiboot and Mighty 1284p 8MHz using Optiboot which addresses/uses/references the internally available clockspeeds.

I can`t do this in my head, nor do I knew much about this. But the interwebs help a poor man out here, too: yields the above. which I assumed would be correct for the above avrdude parameters, but for now the IDE keeps asking me for a port (as in /dev/tty. usbAF65de) which of course t 🔗 External reference