Introduction - If you have any usage issues, please Google them yourself
ranks keyboard of learning is a must to learn microcontroller, but to a newcomer learning together is not easy. The book did not have much information, or explain the detailed, too complex or difficult to understand. In my school ranks at the keyboard and had such problems, Recently, I found a very good way of scanning the ranks-- line reversal method ranks keyboard scan, it is simple to understand, very suitable for beginners to learn, as well as program development purposes.