HID packet size

[lferrari]

Hi,
I'm using pic16c745 as usb driver. I compiled it and loaded it usefully. now I'm tryng to change the spec from two bytes to 8 bytes but for any reason the ccs sample ex_usb_hid.c wont let change much.
I have tried to change as per spec the..

#define USB_EP1_TX_ENABLE 1 //turn on EP1 for IN bulk/interrupt transfers
#define USB_EP1_TX_SIZE 8 //if you change this, be sure to change the hid descriptor

//the following defines needed for the CCS USB PIC driver to enable the RX endpoint 1
#define USB_EP1_RX_ENABLE 1 //turn on EP1 for OUT bulk/interrupt transfers
#define USB_EP1_RX_SIZE 8 //if you change this, be sure to change the hid descriptor

..but when I connect it into the pc it's recognised then it transmit just once and it stops and to get it to work again I have to unplug it and plug it back on, then it will do the same.

I'm not sure if it has something to do with the USB_HID_DESC[] I have tried to change the input and output size on it but with not any different result.

I presume I'm missing something somewhere on the line.
If anyone knows how to change it please let me know.

Many Thanks

[zio_pecos]

#define USB_EP1_TX_ENABLE 1 //turn on EP1 for IN bulk/interrupt transfers
#define USB_EP1_TX_SIZE 8 //if you change this, be sure to change the hid descriptor [/u]

//the following defines needed for the CCS USB PIC driver to enable the RX endpoint 1
#define USB_EP1_RX_ENABLE 1 //turn on EP1 for OUT bulk/interrupt transfers
#define USB_EP1_RX_SIZE 8 //if you change this, be sure to change the hid descriptor

you said that you changed these lines...

did you changed the hid descriptor??

look here
[...]

BYTE CONST USB_HID_DESC[] = { //len=28
6, 0, 255, // Usage Page = Vendor Defined
9, 1, // Usage = IO device
0xa1, 1, // Collection = Application
0x19, 1, // Usage minimum
0x29, 8, // Usage maximum

0x15, 0x80, // Logical minimum (-128)
0x25, 0x7F, // Logical maximum (127)

0x75, 8, // Report size = 8 (bits)
0x95, 8, // Report count = 16 bits (2 bytes)
0x81, 2, // Input (Data, Var, Abs)
0x19, 1, // Usage minimum
0x29, 8, // Usage maximum
0x91, 2, // Output (Data, Var, Abs)
0xc0 // End Collection
};


you only have to set the cyan line as i did

good luck