ahmedragia21
Member
I'm using PIC18F2458 as USB Joystick HID. The program works, but I have few problems.
Right now, The USB is not detected If I write less than 5 values ( Throttle, X,Y, 4 buttons). The current problem is If I'm using an analog sensor for the throttle, other axis x,y getting read too, because they are going to be read from analog input and of course there is noise, so whenever I use a rotary resistor on the throttle usb input, I get other axis written too.
How can I fix that issue ?
second issue how would I add two throttle for the usb descriptor ?
Here is the current code:
and the Descriptor
sometimes I want to hook up an analog sensor into the box, and want to read it, so I want to make a more robust analog sensor box, if there is an input read it, don't send dummy values if there are no sensors connected.
Right now, The USB is not detected If I write less than 5 values ( Throttle, X,Y, 4 buttons). The current problem is If I'm using an analog sensor for the throttle, other axis x,y getting read too, because they are going to be read from analog input and of course there is noise, so whenever I use a rotary resistor on the throttle usb input, I get other axis written too.
How can I fix that issue ?
second issue how would I add two throttle for the usb descriptor ?
Here is the current code:
Code:
unsigned int average(int channel)
{
int samples = 16;
unsigned int sum = 0;
int i;
for (i = 0; i < samples; i++)
{
sum+=(Adc_Read(channel)>>2)-128;
}
sum = sum/16;
return sum;
}
void analogo() {
usb[0] = average(1); // Get 10-bit results of AD conversion
usb[1] = average(9);
usb[2] = average(8);
}
void main(void){
// Disable comparators
ADCON1 = 0x05; // Configure all ports with analog function as digital
TRISA.RA1 =1;
TRISB.RB2=1;
TRISB.RB3 =1;
HID_Enable(&readbuff,&writebuff); // Enable HID communication
//vl6180x_configure();
while(1){
analogo();
USB_Polling_Proc();
writebuff[0]=usb[0]; // throttle
writebuff[1]=usb[1]; // X axis
writebuff[2]=usb[2]; // Y axis
writebuff[3]=0xFF; //button 0xFF
writebuff[4]=0xFF; //button POV 0xFF
HID_Write(&writebuff,5);
}
}and the Descriptor
Code:
const struct {
char report[USB_HID_RPT_SIZE];
}
hid_rpt_desc =
{0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x09, 0x04, // USAGE (Joystick)
0xA1, 0x01, // COLLECTION (Application)
0x05, 0x02, // USAGE_PAGE (Simulation Controls)
0x09, 0xBB, // USAGE (Throttle)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xFF, 0x00, // LOGICAL_MAXIMUM (255)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x01, // REPORT_COUNT (1)
0x81, 0x02, // INPUT (Data Var Abs)
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x01, // USAGE (Pointer)
0xA1, 0x00, // COLLECTION (Physical)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Y)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x02, // INPUT (Data Var Abs)}
0xC0, // END_COLLECTION
0x09, 0x39, // USAGE (Hat switch)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x03, // LOGICAL_MAXIMUM (3)
0x35, 0x00, // PHYSICAL_MINIMUM (0)
0x46, 0x0E, 0x01, // PHYSICAL_MAXIMUM (270)
0x65, 0x14, // UNIT (Eng Rot:Angular Pos)
0x75, 0x04, // REPORT_SIZE (4)
0x95, 0x01, // REPORT_COUNT (1)
0x81, 0x02, // INPUT (Data Var Abs)
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x0A, // USAGE_MAXIMUM (Button 10)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x75, 0x01, // REPORT_SIZE (1)
0x95, 0x0C, // REPORT_COUNT (12) 2 bits added to switch report count
// so bytes are even. Bytes must be even.
0x55, 0x00, // UNIT_EXPONENT (0)
0x65, 0x00, // UNIT (None)
0x81, 0x02, // INPUT (Data Var Abs)
0xC0 // END_COLLECTION
};sometimes I want to hook up an analog sensor into the box, and want to read it, so I want to make a more robust analog sensor box, if there is an input read it, don't send dummy values if there are no sensors connected.
