Revision as of 10:59, 14 December 2014

KEYPAD

Defination	void KEYPAD_Init()
Input Arguments	none
Return Value	none
Description	This function configures the rows and columns for keypad scan. 1.ROW lines are configured as Output. 2.Column Lines are configured as Input.
Usage

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. It follows the following sequences to decode the key pressed: 1.Wait till the previous key is released.. 2.Wait for the new key press. 3.Scan all the rows one at a time for the pressed key. 4.Decodes the key pressed depending on ROW-COL combination and returns its ASCII value.
Usage

@@ Line 23: / Line 23: @@
 {{#Widget:LibTable}}
 |-
-|Defination ||
+|Defination || unsigned char KEYPAD_GetKey()
 |-
-| Input Arguments ||
+| Input Arguments || none
 |-
-| Return Value||
+| Return Value|| uint8_t--> ASCII value of the Key Pressed
 |-
-| Description ||
+| Description ||  This function waits till a key is pressed and returns its ASCII Value. It follows the following sequences to decode the key pressed:
+.Wait till the previous key is released..
+.Wait for the new key press.
+.Scan all the rows one at a time for the pressed key.
+.Decodes the key pressed depending on ROW-COL combination and returns its
+				  ASCII value.
 |-
 | Usage ||
 |}
 ==KEYPAD_WaitForKeyRelease==