![]() Then you already have AVRlib installed and ready to use (so don't worry about it).Īlso, look for this line towards the top:Īnd replace it with your desired frequency. If you are using the $50 Robot source code, SRC = $(TARGET).c a2d.c buffer.c rprintf.c uart.c (C dependencies are automatically generated.) ![]() Open up your makefile, and add in rprintf.c and uart.c if it isn't already there: I will also show you how to change it to your frequency of choice. (all individual components and code) to 8MHz. Since we do not have an external crystal, we will configure the entire system Listed in the 'System Clock and Clock Options->Calibrated Internal RC Oscillator' section. "By default, the Internal RC Oscillator provides an approximate 8.0 MHz clock." How do you know what that frequency is?įrom the datasheet of your ATmega8/ATmega168, we can find: We will be using the maximum frequency that your microcontroller can handle withoutĪdding an external crystal. To use right away and skip this tutorial, or I can explain how and whyĬan 'catch your own fish' without me giving it to you in the future. Now of course I could just give you the code for you (or any AVR based microcontroller) you need to make a few minor modifications to your codeĪnd add a small amount of extra hardware. How to Build a Robot Tutorials - Society of RobotsĪdding UART Functions to AVR and your $50 Robot
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