Hi, i am new to ucontroller programming. I wanted to make some password and 7-segment display projects using 4x4 matrix keyboard as input, in C. I just need some simple example links or sample code or part to understand how to decode the keypad inputs. Thanks in advance.
I knew basic concepts of Digital as well as C programing. That only made me to complete handson on led blinking, 7-segment driving, LCD display driving etc. that too googling myself and some reference books.
Right now i am experimenting with keypad and RS232 serial communication with 89c51. Even again and again going through the code for keypad to understand, i feel difficult to catch every steps. Anyhow i am going through your code. Will try to catch the concept soon. If i have doubt, the only option is asking others experts. Thats wat created the thread in this topic.
just a bit of help
keys must be debounced
Erik
You can use the Keypad encoder IC such as DFL-KEY55A or DFL-Key55B, which can convert the key pressed to RS232. Click on www.dafulaielectronics.com
You can use the Keypad encoder IC