[51] back space command in 4x4keypad

[kalyaniupen]

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

 

[milan.rajik]

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)

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

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//If backspace is pressed

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

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[Surender Reddy]

According to the keypad buttons change the LCD Commands...................