Difference between revisions of "Keypad"
| Line 6: | Line 6: | ||
==KEYPAD_Init== | ==KEYPAD_Init== | ||
| − | {| | + | {|{{Widget:LibCol}} |
{{#Widget:LibTable}} | {{#Widget:LibTable}} | ||
|- | |- | ||
| Line 26: | Line 26: | ||
==KEYPAD_GetKey== | ==KEYPAD_GetKey== | ||
| − | {| | + | {|{{Widget:LibCol}} |
{{#Widget:LibTable}} | {{#Widget:LibTable}} | ||
|- | |- | ||
Revision as of 17:21, 28 December 2014
Contents
[hide]KEYPAD
KEYPAD_Init
{{#Widget:LibTable}}| Defination | void KEYPAD_Init() |
| Input Arguments | none |
| Return Value | none |
| Description | This function configures the rows and columns for keypad scan.
|
| Usage |
KEYPAD_GetKey
{{#Widget:LibTable}}| Defination | unsigned char KEYPAD_GetKey() |
| Input Arguments | none |
| Return Value | uint8_t--> ASCII value of the Key Pressed |
| Description | This function waits till a key is pressed and returns its ASCII Value. |
| Usage |
Usage guide
- #include"keypad.h"
- #include"lcd.h"
- #include "delay.h"
- /* Program to demonstrate the hex-Keypad interface*/
- int main()
- {
- uint8_t key;
- LCD_Init(8,2,16); /*Initialize the 2x16 LCD in 8-bit mode */
- KEYPAD_Init(); /*Configure the ROWs and COLUMNs for keypad scanning*/
- while(1)
- {
- key = KEYPAD_GetKey(); /*Get the Ascii value of the key Pressed */
- LCD_DisplayChar(key); /*Display the key pressed */
- }
- return 0;
- }