So here is the catch, if you have an external programmer connected and you don't have a protection diode, the 5V from the programmer will flow into the battery or power supply. Your external programmer will automatically (usually) power your board through ICSP. Word of warning: if you connect your board to an external programmer through ICSP, 5V is put on pin 2! That means that this pin should directly connect to where-ever your 5V comes from (be it a 7805 or somewhere else). Now mark which is pin 1 near your ICSP header, and connect a cable to it. I'll spare you the sight of my perfboard's back view! This takes some soldering and can be quite annoying, as the pins are quite near eachother. Connect pin 6 of the ICSP header to your ground (GND). Connect pin 5 of the ICSP header to the RESET pin of your MCU (usually pin 1) Connect pin 4 of the ICSP header to the MOSI pin of your MCU. Connect pin 3 of the ICSP header to the SCK pin of your MCU. So not necessarily to your Vcc pin on your MCU, simply put +5V on it. Connect pin 2 of the ICSP header to your +5V supply on your board. Connect pin 1 of the ICSP header to the MISO pin of your MCU. See the image below with the ICSP header pinout and do the following: Beware of the orientation!īefore proceeding please read the warning at the bottom of this page. It works just the same, but be sure to leave NC unconnected. This list is for 2x3 ICSP headers, if you want to use the 2x5 instead, see the image. Be sure to remember which side everything goes to. You can place your ICSP header basically anywhere on your breadboard or perfboard (or PCB), simply connect the following lines to the pins you wrote down. Be sure to position the cable correctly! Step 2: Finding the Pins to Connect To 2x5 connectors will work too as long as you leave enough room. ** Simply using 6 F/F cables works, too, in case you don't have 2x3 connectors. * If you don't have a 2x3 pin header, but instead a single row pin, you can just solder two lines next to eachother in your perfboard. Soldering equipment (or a breadboard will work too, but the pins may be too short to fit properly!) Same method goes to PIC's, just check if it supports ICSP and where the pins are! You can actually just stick the MCU in a board, connect the pins as mentioned, and you can upload software to the MCU, too. 2x3 connector, to connect to your external programmer** External programmer, such as STK 500, AVRISP or AVR Dragon You can download datasheets from Besides the AVR MCU and board, you will also need: I'm a bit new to the world of electronics, so if you find a mistake please feel free to comment! Step 1: Gather Componentsįirst of all you need any kind of AVR controller and the datasheets that relate to it. All you'd have to do is connect slightly differently - just follow the image and it'll work fine.īelow you will see my slightly unorganised remotecontrol repeater, but hey, it works :) In step 3 you can also see the pinout for the 2x5 header, which works just the same. The 10-pin header doesn't really add anything in ICSP mode. This Instructable tells you how to add a 6-pin ICSP header. If that isn't enough feel free to comment and I'll help you as best as I can!īy writing this Instructable (my first, by the way), I assume you have completed an instructable such as the following: - thanks jmsaavedra! This should, however, be compatible with any kind of breadboard-connected MCU or any other set up you have, too. If you have tried this before, but can't programme it, I will also tell you how to fix that from my own experience. So if you are pulling your MCU out each time you want to update the software on it and putting it into a programmer, or if you are just testing out your MCU and don't know what you're going to do with it yet, you can add the ICSP pins. ICSP is basically "in circuit serial programming" which allows you to upload software to your MCU without having to pull it out every time. This will work for non-Arduino's nicely as well. Basically, using the ICSP header will allow you to use an external programmer to 'upload' software to your MCU (microcontroller unit). If you made your own Hackduino or similar project, you may be wondering how to add the ICSP header. So you may have been playing with Arduino's, or rather, Hackduino's.
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