int KEYPAD_ReadWaitUntilRelease(void) { /* The pressed key. */ int pressed_key = 0xFF; /* Wait until the key is pressed. */ do { pressed_key = KEYPAD_Read(); } while (pressed_key == 0xFF); /* Wait until the key is released. */ while (KEYPAD_Read() != 0xFF); return pressed_key; }
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; } }