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Fix demos based on the device mode HID class driver, as well as the driver itself. Changed HID device class driver to require the user to give a buffer and size to hold the previously generated report, for comparison purposes, and altered the prototype of the CALLBACK_HID_Device_CreateHIDReport() function so that reports can be sent to the host even if there are no apparent changes (useful for relative movements in mice, etc.).

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This commit is contained in:
Dean Camera 2009-07-31 03:22:08 +00:00
parent a789619fbe
commit eb41086947
14 changed files with 135 additions and 74 deletions
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15
Demos/Device/ClassDriver/GenericHID/GenericHID.c
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@ -36,6 +36,9 @@
#include "GenericHID.h"
/** Buffer to hold the previously generated HID report, for comparison purposes inside the HID class driver. */
uint8_t PrevHIDReportBuffer[GENERIC_REPORT_SIZE];
/** LUFA HID Class driver interface configuration and state information. This structure is
* passed to all HID Class driver functions, so that multiple instances of the same class
* within a device can be differentiated from one another.
@ -48,6 +51,9 @@ USB_ClassInfo_HID_Device_t Generic_HID_Interface =
.ReportINEndpointNumber = GENERIC_IN_EPNUM,
.ReportINEndpointSize = GENERIC_EPSIZE,
.PrevReportINBuffer = PrevHIDReportBuffer,
.PrevReportINBufferSize = sizeof(PrevHIDReportBuffer),
},
};
@ -126,14 +132,17 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
* \param[in] HIDInterfaceInfo Pointer to the HID class interface configuration structure being referenced
* \param[in,out] ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
* \param[out] ReportData Pointer to a buffer where the created report should be stored
* \param[out] ReportSize Number of bytes written in the report (or zero if no report is to be sent
*
* \return Number of bytes written in the report (or zero if no report is to be sent
* \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
*/
uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID, void* ReportData)
bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
void* ReportData, uint16_t* ReportSize)
{
// Create generic HID report here
return 0;
*ReportSize = 0;
return true;
}
/** HID class driver callback function for the processing of HID reports from the host.