USBasp is an in-circuit programmer for Atmel micro-controllers. It is a nice option if you're just starting with micro-controllers, especially those from Atmel and aren't willing to spend much on a programmer. USBasp uses in-circuit programming interface for uploading your compiled code to the micro-controller.
Before we can use the USBasp we need to make sure that we install the drivers correctly. If you are a Linux or Mac OS user, there's no need to install any driver as your machine will automatically detect the USBasp. So driver installation comes for Windows user like me. It is easy to install the drivers for USBasp, all you need to do are just carry out few steps that I will be telling.
Step 1
Download the Zadig application from here. Zadig is an application that has a set of some generic usb drivers and one of them is for USBasp. Now plug in USBasp before running the application.
Step 2
Once you have started the Zadig application, check if you can find USBasp in list of device in the drop down menu. If you're not seeing USBasp in the list make sure you plugged the USBasp properly. If you have plugged in your USBasp again and still not seeing name of your device in list, click on the 'Options' button and click on 'Show all devices' and you should be able to see USBasp.
Zadig
Step 3
Once you see the usb device in drop-down list, select the driver you want to install in our case we need to select 'libusb-win32(v1.2.6.0)' for USBasp and then click 'Install Driver'. This will install the driver for USBasp driver in few seconds. After driver is installed open device manager and you should be seeing USBasp under libsub devices.
Click on Install Driver
Driver Successfully Installed
USBasp showing up in device manager
So in just 3 easy steps we have successfully installed driver for USBasp programmer, now if you want to check if device is properly communicating with computer you can just check it using AVRDUDE(part of WinAVR) in command line or by using AVRDUDESS (GUI for AVRDUDE). Start AVRDUDESS and select USBasp in select programmer drop-down menu and click detect on right hand side of the window, you will see that some LED on your USBasp flickers that means computer has successfully communicated with USBasp, at bottom you will see 'Unable to detect MCU' that's because we haven't hooked up any micro-controller to the USBasp. In next post I will be telling how to set-up an Atmega328/P chip for getting started with actual coding.
in AVRDUDESS
I have also made a video tutorial for the same post you can also watch that to understand better.
Delay is required in most of our micro-controller applications, for example to blink a LED for certain duration or just to pause the micro-controller for short time. The avr-gcc compiler in Atmel Studio comes with delay.h library to make things easy for us, but do we know how it work. No, not until we do some digging inside of the library. In this post we will learn to generate short delay without using library, this will give some basic idea for how the _delay_ms() or _delay_us() works. In this tutorial a Logic Analyzer is used to observe the output of Atmega328 on pin PB5. Circuit configuration for Atmega328 is shown in diagram below. Circuit Configuration Atmega328 has three individual timer/counters identified as TC0, TC1, TC2. TC0 is an 8 bit general purpose timer/counter which can also be used for generating PWM waves, TC1 on other hand is 16 bit timer and can be used for generating PWM. Timer/Counter 2 (TC2) is 8 bit timer with support for PWM generat
Thanks for explaining ;)
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