Hello! I have found a question and answer on the forum about HID transmission that mentions HID can only send 6 bytes of data in boot mode, and suggests using UART for sending more bytes. However, I believe keyboards cannot use UART to send keystrokes. I would like to know if modifying the HID descriptor and changing boot to report can allow for sending more bytes of data.
static uint8_t report_map_data[] =
{
0x05, 0x01, // Usage Page
0x09, 0x06, // Usage (Keyboard),
0xA1, 0x01, // Collection (Application),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0xE0, // Usage Minimum (224),
0x29, 0xE7, // Usage Maximum (231),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum (1),
0x75, 0x01, // Report Size (1),
0x95, 0x08, // Report Count (8),
0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
0x95, 0x78, // Report Count (120)
0x75, 0x01, // Report Size (1),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum(1),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0x00, // Usage Minimum (0),
0x29, 0x77, // Usage Maximum (120),
0x81, 0x02, // Input (Data, Variable, Absolute),
0xC0 // End Collection (Application)
};
