void ui_usb_sof_event(void)
{
static uint16_t counter_sof = 0;
if (ui_enum_status == UHC_ENUM_SUCCESS) {
/* Display device enumerated and in active mode */
if (++counter_sof > 2000) {
counter_sof = 0;
}
if (counter_sof % 1000 == 0) {
ui_adc_read();
}
if (read_complete_flag != AOA_READ_ONGOING) {
if (read_complete_flag == AOA_READ_SUCCESS) {
ui_usb_message_reception();
}
read_complete_flag = AOA_READ_ONGOING;
uhi_aoa_read(ui_msg, sizeof(ui_msg), read_complete);
}
/* Buttons */
if (ui_button_state_changed) {
ui_button_state[ui_button_state_changed - 1] =
!ui_button_state[ui_button_state_changed - 1];
ui_msg[0] = MESSAGE_ATD_SIMPLE_SWITCH;
ui_msg[1] = ui_button_state_changed - 1;
ui_msg[2] =
ui_button_state[ui_button_state_changed - 1];
uhi_aoa_write(ui_msg, 3, NULL);
ui_button_state_changed = 0x00;
}
}
}
/*******************************************************************************
* MAIN FUNCTION *
*******************************************************************************/
int main(void)
{
unsigned char distance = 0; // declare a variable to store distance
// ensure all the hardware port in zero initially
PORTA = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
PORTE = 0;
// Initialize the I/O port direction, this must be configured according to circuit
// please refer to PTK40A schematic for details
// TRISX control pin direction, output pin must be configure as '0'
// while input must be configure as '1'
TRISA = 0b00010001;
TRISB = 0b00001111;
TRISC = 0b10010011;
TRISD = 0;
TRISE = 0;
// Initialize ADC.
adc_initialize(); //Ensure pin share with analog is being configured to digital correctly
// Initialize LCD
lcd_initialize(); //Initialize LCD before use
beep(2); //buzzer sound for twice
// PTK40A come with an ADC input (RA0), 3 different source can be connected to ADC in
// There are LM35 temperature sensor, Potentiometer and external sensor
// This example will use external ADC to read information from SHARP ANALOG DISTANCE SENSOR
// Connect GND of the sensor to GND of PTK40A (ADC external port)
// Connect Vcc of sensor to 5V of PTK40A (ADC external port)
// Connect Vo of senosr to IN of PTK40A (ADC external port)
// Please refer to PTK40A schematic for the connection
// Please move JP14 to EXT (under ADC)
// This example is based on GP2Y0A21 (10 to 80 cm)
adc_on(); //activate ADC module in PIC
LCD_BACKLIGHT = 1; //activate LCD Backlight
lcd_putstr("Cytron PTK40A"); //display message on LCD
lcd_2ndline(); //move cursor to 2nd line
lcd_putstr("DISTANCE:");
lcd_goto(0X4E);
lcd_putstr("cm"); // display symbol of cm
while(1) // create an infinite loop
{
//refer datasheet graph for the convertion calculation
distance = ui_adc_read()>>2; // read from Sharp distance sensor and convert to cm
distance = 256 - distance;
distance = ((distance*10)+100)/36; //calculation is calculater according to the data sheet graph
lcd_goto(0x4B); //move cursor to after DISTANCE: on LCD
lcd_bcd(3,distance); // display distance in cm
delay_ms(50);
}
while(1) continue; // infinite loop to prevent PIC from reset if there is no more program
}
/*******************************************************************************
* MAIN FUNCTION *
*******************************************************************************/
int main(void)
{
unsigned char step = 0; // declare a variable to store stepper step sequence
unsigned int delay = 0; // declare a variable for stepper delay, need to be 16-bit for > 255
// ensure all the hardware port in zero initially
PORTA = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
PORTE = 0;
// Initialize the I/O port direction, this must be configured according to circuit
// please refer to PTK40A schematic for details
// TRISX control pin direction, output pin must be configure as '0'
// while input must be configure as '1'
TRISA = 0b00010001;
TRISB = 0b00001111;
TRISC = 0b10010011;
TRISD = 0;
TRISE = 0;
// Initialize ADC.
adc_initialize(); //Ensure pin share with analog is being configured to digital correctly
// PTK40A come with an ADC input (RA0), 3 different source can be connected to ADC in
// There are LM35 temperature sensor, Potentiometer and external sensor
// There is also a stepper motor
// Please refer to PTK40A schematic for the connection
// Turning the potentiometer clock wise will change the speed of stepper rotation
// Please move JP10 to PWM, JP14 to POT, JP20&21 to STEPPER, JP23&24 to UNIPOLAR
adc_on(); //activate ADC module in PIC
step = 1; //initial step is 1
RC2 = 1; //RC2 pin is the PWM pin, in stepper case, the PWM is always 1
while(1) // create an infinite loop
{
if(step >= 5) step = 1; // reset the step sequance to 1
delay = ui_adc_read();
if (delay > 10) // if delay is larger than 10, enter stepping
{
switch (step)
{
case 1:
X = 1; // step 1
Y = 0;
XN = 0;
YN = 0;
break;
case 2:
X = 0; // step 2
Y = 1;
XN = 0;
YN = 0;
break;
case 3:
X = 0; // step 3
Y = 0;
XN = 1;
YN = 0;
break;
case 4:
X = 0; // step 4
Y = 0;
XN = 0;
YN = 1;
break;
}//switch (step)
delay_ms(delay);
step ++; // increase step
}//if(delay > 10)
} // while (1)
while(1) continue; // infinite loop to prevent PIC from reset if there is no more program
}
