Custom HID device HID report descriptor report count - usb

Question

I simply want to send from device to host with two report ID.These reports must have different Report Count(First report id has 4 report count, second report id has 40).This is what I have done so far:
//14 bytes
0x06, 0x00, 0xff, // USAGE_PAGE (Vendor Defined Page 1)
0x09, 0x01, // USAGE (Vendor Usage 1)
0xa1, 0x01, // COLLECTION (Application)
// -------- common global items ---------
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
0x75, 0x08, // REPORT_SIZE (8)
// 10 bytes | Input message 1 (sent from device to host)
0x85, 5, // Global Report ID (cannot be 0)
0x95, 4, // Global Report Count (number of Report Size fields)
0x19, 0x01, // USAGE_MINIMUM (Vendor Usage 1)
0x29, 5, // USAGE_MAXIMUM (Vendor Usage 64)
0x81, 0x02, // Main Input (data, array, absolute)
// 10 bytes | Input message 1 (sent from device to host)
0x85, 6, // Global Report ID (cannot be 0)
0x95, 40, // Global Report Count (number of Report Size fields)
0x19, 0x01, // USAGE_MINIMUM (Vendor Usage 1)
0x29, 41, // USAGE_MAXIMUM (Vendor Usage 64)
0x81, 0x02, // Main Input (data, array, absolute)
0xC0
But first report id is sending 40 bayt.Where is my mistake?
HID Terminal output:
R 02 0C 16 20 2A 34 3E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
R 01 0B 15 1F 29 34 3E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Answer 1

I believe #Nipo has given you the correct answer: the report descriptor indicates what each report should look like, but it is still the responsibility of your code to send reports with the correct length specified.
For report id 5 that would be 5 (1 for the report id + 4 for the payload), and
for report it 6 it would be 41 (1 for the report id + 40 for the payload).
BTW, your report descriptor may need a little tweaking. As it stands, it decodes as:
//--------------------------------------------------------------------------------
// Decoded Application Collection
//--------------------------------------------------------------------------------
PROGMEM char usbHidReportDescriptor[] =
{
0x06, 0x00, 0xFF, // (GLOBAL) USAGE_PAGE 0xFF00 Vendor-defined
0x09, 0x01, // (LOCAL) USAGE 0xFF000001 <-- Warning: Undocumented usage
0xA1, 0x01, // (MAIN) COLLECTION 0x00000001 Application (Usage=0xFF000001: Page=Vendor-defined, Usage=, Type=)
0x15, 0x00, // (GLOBAL) LOGICAL_MINIMUM 0x00 (0) <-- Redundant: LOGICAL_MINIMUM is already 0 <-- Info: Consider replacing 15 00 with 14
0x26, 0xFF, 0x00, // (GLOBAL) LOGICAL_MAXIMUM 0x00FF (255)
0x75, 0x08, // (GLOBAL) REPORT_SIZE 0x08 (8) Number of bits per field
0x85, 0x05, // (GLOBAL) REPORT_ID 0x05 (5)
0x95, 0x04, // (GLOBAL) REPORT_COUNT 0x04 (4) Number of fields
0x19, 0x01, // (LOCAL) USAGE_MINIMUM 0xFF000001 <-- Warning: Undocumented usage
0x29, 0x05, // (LOCAL) USAGE_MAXIMUM 0xFF000005 <-- Warning: Undocumented usage
0x81, 0x02, // (MAIN) INPUT 0x00000002 (4 fields x 8 bits) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap
0x85, 0x06, // (GLOBAL) REPORT_ID 0x06 (6)
0x95, 0x28, // (GLOBAL) REPORT_COUNT 0x28 (40) Number of fields
0x19, 0x01, // (LOCAL) USAGE_MINIMUM 0xFF000001 <-- Warning: Undocumented usage
0x29, 0x29, // (LOCAL) USAGE_MAXIMUM 0xFF000029 <-- Warning: Undocumented usage
0x81, 0x02, // (MAIN) INPUT 0x00000002 (40 fields x 8 bits) 0=Data 1=Variable 0=Absolute 0=NoWrap 0=Linear 0=PrefState 0=NoNull 0=NonVolatile 0=Bitmap
0xC0, // (MAIN) END_COLLECTION Application
};
//--------------------------------------------------------------------------------
// Vendor-defined inputReport 05 (Device --> Host)
//--------------------------------------------------------------------------------
typedef struct
{
uint8_t reportId; // Report ID = 0x05 (5)
uint8_t VEN_VendorDefined0001; // Usage 0xFF000001: , Value = 0 to 255
uint8_t VEN_VendorDefined0002; // Usage 0xFF000002: , Value = 0 to 255
uint8_t VEN_VendorDefined0003; // Usage 0xFF000003: , Value = 0 to 255
uint8_t VEN_VendorDefined0004; // Usage 0xFF000004: , Value = 0 to 255
// Usage 0xFF000005 Value = 0 to 255 <-- Ignored: REPORT_COUNT (4) is too small
} inputReport05_t;
//--------------------------------------------------------------------------------
// Vendor-defined inputReport 06 (Device --> Host)
//--------------------------------------------------------------------------------
typedef struct
{
uint8_t reportId; // Report ID = 0x06 (6)
uint8_t VEN_VendorDefined0001; // Usage 0xFF000001: , Value = 0 to 255
uint8_t VEN_VendorDefined0002; // Usage 0xFF000002: , Value = 0 to 255
uint8_t VEN_VendorDefined0003; // Usage 0xFF000003: , Value = 0 to 255
uint8_t VEN_VendorDefined0004; // Usage 0xFF000004: , Value = 0 to 255
uint8_t VEN_VendorDefined0005; // Usage 0xFF000005: , Value = 0 to 255
uint8_t VEN_VendorDefined0006; // Usage 0xFF000006: , Value = 0 to 255
uint8_t VEN_VendorDefined0007; // Usage 0xFF000007: , Value = 0 to 255
uint8_t VEN_VendorDefined0008; // Usage 0xFF000008: , Value = 0 to 255
uint8_t VEN_VendorDefined0009; // Usage 0xFF000009: , Value = 0 to 255
uint8_t VEN_VendorDefined000A; // Usage 0xFF00000A: , Value = 0 to 255
uint8_t VEN_VendorDefined000B; // Usage 0xFF00000B: , Value = 0 to 255
uint8_t VEN_VendorDefined000C; // Usage 0xFF00000C: , Value = 0 to 255
uint8_t VEN_VendorDefined000D; // Usage 0xFF00000D: , Value = 0 to 255
uint8_t VEN_VendorDefined000E; // Usage 0xFF00000E: , Value = 0 to 255
uint8_t VEN_VendorDefined000F; // Usage 0xFF00000F: , Value = 0 to 255
uint8_t VEN_VendorDefined0010; // Usage 0xFF000010: , Value = 0 to 255
uint8_t VEN_VendorDefined0011; // Usage 0xFF000011: , Value = 0 to 255
uint8_t VEN_VendorDefined0012; // Usage 0xFF000012: , Value = 0 to 255
uint8_t VEN_VendorDefined0013; // Usage 0xFF000013: , Value = 0 to 255
uint8_t VEN_VendorDefined0014; // Usage 0xFF000014: , Value = 0 to 255
uint8_t VEN_VendorDefined0015; // Usage 0xFF000015: , Value = 0 to 255
uint8_t VEN_VendorDefined0016; // Usage 0xFF000016: , Value = 0 to 255
uint8_t VEN_VendorDefined0017; // Usage 0xFF000017: , Value = 0 to 255
uint8_t VEN_VendorDefined0018; // Usage 0xFF000018: , Value = 0 to 255
uint8_t VEN_VendorDefined0019; // Usage 0xFF000019: , Value = 0 to 255
uint8_t VEN_VendorDefined001A; // Usage 0xFF00001A: , Value = 0 to 255
uint8_t VEN_VendorDefined001B; // Usage 0xFF00001B: , Value = 0 to 255
uint8_t VEN_VendorDefined001C; // Usage 0xFF00001C: , Value = 0 to 255
uint8_t VEN_VendorDefined001D; // Usage 0xFF00001D: , Value = 0 to 255
uint8_t VEN_VendorDefined001E; // Usage 0xFF00001E: , Value = 0 to 255
uint8_t VEN_VendorDefined001F; // Usage 0xFF00001F: , Value = 0 to 255
uint8_t VEN_VendorDefined0020; // Usage 0xFF000020: , Value = 0 to 255
uint8_t VEN_VendorDefined0021; // Usage 0xFF000021: , Value = 0 to 255
uint8_t VEN_VendorDefined0022; // Usage 0xFF000022: , Value = 0 to 255
uint8_t VEN_VendorDefined0023; // Usage 0xFF000023: , Value = 0 to 255
uint8_t VEN_VendorDefined0024; // Usage 0xFF000024: , Value = 0 to 255
uint8_t VEN_VendorDefined0025; // Usage 0xFF000025: , Value = 0 to 255
uint8_t VEN_VendorDefined0026; // Usage 0xFF000026: , Value = 0 to 255
uint8_t VEN_VendorDefined0027; // Usage 0xFF000027: , Value = 0 to 255
uint8_t VEN_VendorDefined0028; // Usage 0xFF000028: , Value = 0 to 255
// Usage 0xFF000029 Value = 0 to 255 <-- Ignored: REPORT_COUNT (40) is too small
} inputReport06_t;
You may want to try the following instead:
//--------------------------------------------------------------------------------
// Decoded Application Collection
//--------------------------------------------------------------------------------
PROGMEM char usbHidReportDescriptor[] =
{
0x06, 0x00, 0xFF, // (GLOBAL) USAGE_PAGE 0xFF00 Vendor-defined
0x09, 0x01, // (LOCAL) USAGE 0xFF000001 <-- Warning: Undocumented usage
0xA1, 0x01, // (MAIN) COLLECTION 0x00000001 Application (Usage=0xFF000001: Page=Vendor-defined, Usage=, Type=)
0x15, 0x00, // (GLOBAL) LOGICAL_MINIMUM 0x00 (0) <-- Redundant: LOGICAL_MINIMUM is already 0 <-- Info: Consider replacing 15 00 with 14
0x26, 0xFF, 0x00, // (GLOBAL) LOGICAL_MAXIMUM 0x00FF (255)
0x75, 0x08, // (GLOBAL) REPORT_SIZE 0x08 (8) Number of bits per field
0x85, 0x05, // (GLOBAL) REPORT_ID 0x05 (5)
0x95, 0x04, // (GLOBAL) REPORT_COUNT 0x04 (4) Number of fields
0x19, 0x01, // (LOCAL) USAGE_MINIMUM 0xFF000001 <-- Warning: Undocumented usage
0x29, 0x04, // (LOCAL) USAGE_MAXIMUM 0xFF000004 <-- Warning: Undocumented usage
0x81, 0x00, // (MAIN) INPUT 0x00000000 (4 fields x 8 bits) 0=Data 0=Array 0=Absolute 0=Ignored 0=Ignored 0=PrefState 0=NoNull
0x85, 0x06, // (GLOBAL) REPORT_ID 0x06 (6)
0x95, 0x28, // (GLOBAL) REPORT_COUNT 0x28 (40) Number of fields
0x19, 0x01, // (LOCAL) USAGE_MINIMUM 0xFF000001 <-- Warning: Undocumented usage
0x29, 0x28, // (LOCAL) USAGE_MAXIMUM 0xFF000028 <-- Warning: Undocumented usage
0x81, 0x00, // (MAIN) INPUT 0x00000000 (40 fields x 8 bits) 0=Data 0=Array 0=Absolute 0=Ignored 0=Ignored 0=PrefState 0=NoNull
0xC0, // (MAIN) END_COLLECTION Application
};
//--------------------------------------------------------------------------------
// Vendor-defined inputReport 05 (Device --> Host)
//--------------------------------------------------------------------------------
typedef struct
{
uint8_t reportId; // Report ID = 0x05 (5)
uint8_t VEN_VendorDefined[4]; // Value = 0 to 255
} inputReport05_t;
//--------------------------------------------------------------------------------
// Vendor-defined inputReport 06 (Device --> Host)
//--------------------------------------------------------------------------------
typedef struct
{
uint8_t reportId; // Report ID = 0x06 (6)
uint8_t VEN_VendorDefined[40]; // Value = 0 to 255
} inputReport06_t;