{"id":239,"date":"2021-08-30T23:49:12","date_gmt":"2021-08-31T06:49:12","guid":{"rendered":"https:\/\/shmalex.com\/?p=239"},"modified":"2021-12-26T00:39:11","modified_gmt":"2021-12-26T07:39:11","slug":"assembly-4-bit-push-button-binary-counter","status":"publish","type":"post","link":"https:\/\/electronsandxploits.com\/?p=239","title":{"rendered":"Assembly 4-bit Push Button Binary Counter"},"content":{"rendered":"\n

This was mostly a learning opportunity to teach myself how to use a low-level programing language in programming a microcontoller. I have always been fascinated with early programming languages, but assembly code had always seemed to be like a complete alien language compared to all other coding languages. Assembly is as close to the processor as one can get writing code without literally writing the ones and zeros that computers understand. Although most of us will never use it, getting just a lesson or two in it help understand how programing languages interact with the physical component of the computer.<\/p>\n\n\n\n

This project was fairly simple in its nature but writing it in assembly and programming the microchip made it far more interesting. Using a Microchip PIC18F45K20<\/a> microcontroller set on breadboard connected to a micro tact switch and 4 LEDs, assembly code was written for a 4-bit binary counter. Each LED represents a 0 or 1 by being in the off or on state, e.g. (off,off,off,off =0000= 0) and (on,on,on,on)=1111=15). To increment the binary counter the tactile switch was used as input, each push sent a signal to the microcontroller counter which would output the new binary value to the user through the LEDs. Once the 4-bit counter reached 15 or 1111 the counter would reset back to 0 to repeat the process. <\/p>\n\n\n\n

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PIC18F45K20 Pinout<\/figcaption><\/figure><\/div>\n\n\n\n