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[51] back space command in 4x4keypad

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kalyaniupen

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sir,
i want to know the code in embedded c for backspace,up arrow,down arrow in 4x4 keypad pls help me
 

On Key press you append the key value to an array and terminate it with null character and use this string to display data on LCD. You also use a counter to index array elements.

On Key press (except back space)

Code C - [expand]
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keyData[i++] = Key;
keyData[i] = '\0';
displayOnLCD(keyData);


//If backspace is pressed

Code C - [expand]
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i--;
keyData[i] = '\0';
diaplayOnLCD(keyData);
 

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