[51] back space command in 4x4keypad

kalyaniupen · Jul 30, 2014

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

milan.rajik · Jul 30, 2014

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);

Surender Reddy · Jul 30, 2014

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

[51] back space command in 4x4keypad

kalyaniupen

Junior Member level 2

milan.rajik

Banned

Surender Reddy

Full Member level 2

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Code C - [expand]
1 2 3	keyData[i++] = Key; keyData[i] = '\0'; displayOnLCD(keyData);

Code C - [expand]
1 2 3	i--; keyData[i] = '\0'; diaplayOnLCD(keyData);

[51] back space command in 4x4keypad

kalyaniupen

Junior Member level 2

milan.rajik

Banned

Surender Reddy

Full Member level 2

Similar threads

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