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General • Re: Using Raspberry Pi Pico as HID bridge for Pi 5 - Feasibility check

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Check your HID descriptor:

Code:

0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)0x09, 0x06,        // Usage (Keyboard)0xA1, 0x01,        // Collection (Application)0x85, 0x01,        //   Report ID (1)0x05, 0x07,        //   Usage Page (Kbrd/Keypad)0x19, 0xE0,        //   Usage Minimum (0xE0)0x29, 0xE7,        //   Usage Maximum (0xE7)0x15, 0x00,        //   Logical Minimum (0)0x25, 0x01,        //   Logical Maximum (1)0x75, 0x01,        //   Report Size (1)0x95, 0x08,        //   Report Count (8)0x81, 0x02,        //   Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)0x95, 0x01,        //   Report Count (1)0x75, 0x08,        //   Report Size (8)0x81, 0x01,        //   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)0x95, 0x06,        //   Report Count (6)0x75, 0x08,        //   Report Size (8)0x15, 0x00,        //   Logical Minimum (0)0x25, 0x65,        //   Logical Maximum (101)0x05, 0x07,        //   Usage Page (Kbrd/Keypad)0x19, 0x00,        //   Usage Minimum (0x00)0x29, 0x65,        //   Usage Maximum (0x65)0x81, 0x00,        //   Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)0xC0,              // End Collection0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)0x09, 0x02,        // Usage (Mouse)0xA1, 0x01,        // Collection (Application)0x85, 0x02,        //   Report ID (2)0x09, 0x01,        //   Usage (Pointer)0xA1, 0x00,        //   Collection (Physical)0x05, 0x09,        //     Usage Page (Button)0x19, 0x01,        //     Usage Minimum (0x01)0x29, 0x03,        //     Usage Maximum (0x03)0x15, 0x00,        //     Logical Minimum (0)0x25, 0x01,        //     Logical Maximum (1)0x95, 0x00,        //     Report Count (0)0x03, 0x75, 0x01, 0x81, 0x02,  //     Unknown (bTag: 0x00, bType: 0x00)0x95, 0x01,        //     Report Count (1)0x75, 0x05,        //     Report Size (5)0x81, 0x01,        //     Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position)0x05, 0x01,        //     Usage Page (Generic Desktop Ctrls)0x09, 0x30,        //     Usage (X)0x09, 0x31,        //     Usage (Y)0x15, 0x81,        //     Logical Minimum (-127)0x25, 0x7F,        //     Logical Maximum (127)0x75, 0x08,        //     Report Size (8)0x95, 0x02,        //     Report Count (2)0x81, 0x06,        //     Input (Data,Var,Rel,No Wrap,Linear,Preferred State,No Null Position)0xC0,              //   End Collection0xC0,              // End Collection0x05, 0x01,        // Usage Page (Generic Desktop Ctrls)0x09, 0x02,        // Usage (Mouse)0xA1, 0x01,        // Collection (Application)0x85, 0x02,        //   Report ID (2)0x09, 0x01,        //   Usage (Pointer)0xA1, 0x00,        //   Collection (Physical)0x05, 0x09,        //     Usage Page (Button)0x19, 0x01,        //     Usage Minimum (0x01)0x29, 0x03,        //     Usage Maximum (0x03)0x15, 0x00,        //     Logical Minimum (0)0x25, 0x01,        //     Logical Maximum (1)0x95, 0x03,        //     Report Count (3)0x75, 0x01,        //     Report Size (1)0x81, 0x02,        //     Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)0x95, 0x01,        //     Report Count (1)0x75, 0x05,        //     Report Size (5)0x81, 0x03,        //     Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)0x05, 0x01,        //     Usage Page (Generic Desktop Ctrls)0x09, 0x30,        //     Usage (X)0x09, 0x31,        //     Usage (Y)0x15, 0x01,        //     Logical Minimum (1)0x02,              //     Unknown (bTag: 0x00, bType: 0x00)// 143 bytes

Statistics: Posted by MatSOBDev2 — Sat Mar 29, 2025 8:58 am



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