/**
* @brief Check to see if a key is pressed, and if one is, which.
*
* @notes Check to see if a key is pressed. If one is, determine which it s.
* @retval The key that is pressed.
*/
uint8_t KEYPAD_Check(void){
uint8_t pressed_button = 0;
GPIO_InitTypeDef GPIO_InitStructure;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_ROW_4)) pressed_button = 4;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_ROW_3)) pressed_button = 3;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_ROW_2)) pressed_button = 2;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_ROW_1)) pressed_button = 1;
GPIO_InitStructure.GPIO_Pin = KEYPAD_ROW_4 | KEYPAD_ROW_1 | KEYPAD_ROW_2 | KEYPAD_ROW_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
GPIO_Init(KEYPAD_GPIO, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = KEYPAD_COL_1 | KEYPAD_COL_2 | KEYPAD_COL_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
GPIO_Init(KEYPAD_GPIO, &GPIO_InitStructure);
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_COL_1)) pressed_button += 10;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_COL_2)) pressed_button += 20;
if(!GPIO_ReadInputDataBit(KEYPAD_GPIO, KEYPAD_COL_3)) pressed_button += 30;
KEYPAD_Init();
switch(pressed_button){
case 11:
return 1;
case 12:
return 4;
case 13:
return 7;
case 14:
return 14;
case 21:
return 2;
case 22:
return 5;
case 23:
return 8;
case 24:
return 0;
case 31:
return 3;
case 32:
return 6;
case 33:
return 9;
case 34:
return 34;
}
return 99;
}
/***************************************************KEYPAD *****************************************
Displays keys pressed on 4x4 keypad on the uart
*****************************************************TEST*******************************************/
void keypad_test()
{
uint8_t key;
UART_Printf("\n\rConnections: Port 2");
UART_Printf("\n\rMake connections and hit 'k' to test!");
while(UART_RxChar()!='k');
KEYPAD_Init();
while(1)
{
key = KEYPAD_GetKey();
UART_Printf("\n\r Key:%c", key);
}
}
int main()
{
uint8_t key;
SystemInit();
UART0_Init(9600); // Initialize UART0 at 9600 baud rate
KEYPAD_Init(P2_0,P2_1,P2_2,P2_3,P2_4,P2_5,P2_6,P2_7); // Keypad is connected to P2_0 - P2_7
while (1)
{
key = KEYPAD_GetKey(); // Read the Ascii value of Key
UART0_Printf("\n\r Key:%c", key); // Transmit the key pressed on UART
}
}
/***************************************************KEYPAD *****************************************
Displays keys pressed on 4x4 keypad on the uart
*****************************************************TEST*******************************************/
void keypad_test()
{
uint8_t key;
UART_Printf("\n\rConnections: PORTD");
UART_Printf("\n\rMake connections and hit 'k' to test!");
while(UART_RxChar()!='k');
KEYPAD_Init(PD_0,PD_1,PD_2,PD_3,PD_4,PD_5,PD_6,PD_7);
while(1)
{
key = KEYPAD_GetKey();
UART_Printf("\n\r Key:%c", key);
}
}
/* Program to demonstrate the hex-Keypad interface*/
int main()
{
uint8_t key;
LCD_Init(8,2,16); /*Initialize the 2x16 LCD in 8-bit mode */
KEYPAD_Init(); /*Configure the ROWs and COLUMNs for keypad scanning*/
while(1)
{
key = KEYPAD_GetKey(); /*Get the Ascii value of the key Pressed */
LCD_DisplayChar(key); /*Display the key pressed */
}
return 0;
}
void sMCIfaceKEYPAD_init() {
KEYPAD_Init();
}
int main(void) {
TRIS_KEY1 = 1;
TRIS_KEY2 = 1;
TRIS_LED1 = 0;
TRIS_LED2 = 0;
LAT_LED1 = 0;
LAT_LED2 = 0;
/* External Interrupts Configuration */
INTCONbits.INT0E = 1; /* Enable Interrupt 0 (RB0 as interrupt) */
INTCON2bits.INTEDG0 = 1; /* Cause Interrupt 0 at rising edge */
INTCONbits.INT0F = 0; /* Clear Interrupt 0 flag */
INTCON3bits.INT1E = 1; /* Enable Interrupt 1 (RB1 as interrupt) */
INTCON2bits.INTEDG1 = 1; /* Cause Interrupt 1 at rising edge */
INTCON3bits.INT1F = 0; /* Clear Interrupt 0 flag */
ei(); /* Global Interrupt Enable */
/* Initialize LCD 16 cols x 2 rows */
HD44780_Init(16, 2);
HD44780_Puts(3, 0, "PIC18F4520");
HD44780_Puts(0, 1, "16x2 HD44780 LCD");
Delayms(2000);
SSEG_Init();
KEYPAD_Init();
OpenADC(ADC_FOSC_4 &
ADC_RIGHT_JUST &
ADC_0_TAD,
ADC_CH0 &
ADC_REF_VDD_VSS &
ADC_INT_OFF,
ADC_1ANA);
Delay(50);
/* Loop forever */
while(1) {
if (state == STATE_LCD) {
counter = 0;
lcd_flag = 0;
while(lcd_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "1.LCD TEST");
HD44780_Puts(0, 1, "<<ADC LED>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "1.LCD TEST");
HD44780_Puts(0, 1, "<<ADC LED>>");
while(lcd_flag == 0){
HD44780_Clear();
HD44780_Puts(0, 0, "PRESS KEY1 FOR");
HD44780_Puts(0, 1, "LEFT");
Delayms(500);
HD44780_Clear();
HD44780_Puts(0, 0, "PRESS KEY2 FOR");
HD44780_Puts(0, 1, "RIGHT");
Delayms(500);
counter++;
if(counter > 3) {counter = 0; break;}
}
}
else if (state == STATE_LED) {
counter = 0;
led_flag = 0;
while(led_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "2.LED TEST");
HD44780_Puts(0, 1, "<<LCD SSEG>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "2.LED TEST");
HD44780_Puts(0, 1, "<<LCD SSEG>>");
while(led_flag == 0) {
LAT_LED1 = 1;
LAT_LED2 = 0;
Delayms(50);
LAT_LED1 = 0;
LAT_LED2 = 1;
Delayms(50);
}
LAT_LED2 = 0;
}
else if (state == STATE_SSEG) {
counter = 0;
sseg_flag = 0;
while(sseg_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "3.SSEG TEST");
HD44780_Puts(0, 1, "<<LED KEYPAD>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "3.SSEG TEST");
HD44780_Puts(0, 1, "<<LED KEYPAD>>");
while(sseg_flag == 0) {
SSEG_Print(1,sseg_counter%10);
Delayms(10);
SSEG_Print(2,sseg_counter/10);
Delayms(10);
sseg_counter++;
if(sseg_counter > 99) sseg_counter = 0;
}
LATCbits.LATC0 = 0;
LATCbits.LATC5 = 0;
}
else if (state == STATE_KEYPAD) {
counter = 0;
keypad_flag = 0;
while(keypad_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "4.KEYPAD TEST");
HD44780_Puts(0, 1, "<<SSEG ADC>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "4.KEYPAD TEST");
HD44780_Puts(0, 1, "<<SSEG ADC>>");
while(keypad_flag == 0) {
int_key = KEYPAD_Read();
char_key = (char)KEYPAD_KeytoASCII(int_key);
HD44780_CursorSet(0,0);
if(int_key != 0xFF)
printf("4.KEYPAD TEST: %c", char_key);
Delayms(50);
}
}
else if (state == STATE_ADC) {
counter = 0;
adc_flag = 0;
while(adc_flag == 0) {
HD44780_Clear();
Delayms(250);
HD44780_Clear();
HD44780_Puts(0, 0, "5.ADC TEST");
HD44780_Puts(0, 1, "<<KEYPAD LCD>>");
Delayms(250);
counter++;
if(counter > 3) {counter = 0; break;}
}
HD44780_Clear();
HD44780_Puts(0, 0, "5.ADC TEST");
HD44780_Puts(0, 1, "<<KEYPAD LCD>>");
while(adc_flag == 0){
ConvertADC();
while( BusyADC() );
adcin = 1023 - ReadADC();
dcf_old = dcf;
dcf = (1-lamda)*dcf + lamda*adcin;
if(dcf != dcf_old) {
HD44780_CursorSet(0,0);
printf("5.ADC TEST: %4d", (int)dcf);
}
}
}
else state = STATE_LCD;
}
}
