User manual

346
mikoC PRO for PIC32
MikroElektronika
Library Example
The following code can be used for testing the keypad. It is written for keypad_4x3 or _4x4. The code returned by the
keypad functions (1..16) is transformed into ASCII codes [0..9,A..F], and then sent via UART1.
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unsigned short kp, oldstate = 0;
char txt[6];
// Keypad module connections
unsigned long keypadPort at PORTD;
unsigned long keypadPort_Direction at TRISD;
// End Keypad module connections
void main() {
AD1PCFG = 0xFFFF;
CHECON = 0x32;
UART1_Init(19200); // Initialize UART module at 9600 bps
Delay_ms(10);
Keypad_Init(); // Initialize Keypad
UART1_Write_Text(“Press any key on your keypad...”);
UART1_Write(10);
UART1_Write(13);
LATD = 0;
do {
kp = 0; // Reset key code variable
// Wait for key to be pressed and released
do
// kp = Keypad_Key_Press(); // Store key code in kp variable
kp = Keypad_Key_Click(); // Store key code in kp variable
while (!kp);
// Prepare value for output, transform key to it’s ASCII value
switch (kp) {
//case 10: kp = 42; break; // ‘*’ // Uncomment this block for keypad4x3
//case 11: kp = 48; break; // ‘0’
//case 12: kp = 35; break; // ‘#’
//default: kp += 48;
case 1: kp = 49; break; // 1 // Uncomment this block for keypad4x4
case 2: kp = 50; break; // 2
case 3: kp = 51; break; // 3
case 4: kp = 65; break; // A
case 5: kp = 52; break; // 4
case 6: kp = 53; break; // 5
case 7: kp = 54; break; // 6
case 8: kp = 66; break; // B
case 9: kp = 55; break; // 7
case 10: kp = 56; break; // 8
case 11: kp = 57; break; // 9
case 12: kp = 67; break; // C
case 13: kp = 42; break; // *
case 14: kp = 48; break; // 0
case 15: kp = 35; break; // #
case 16: kp = 68; break; // D