From eb410869474e14ec5762a96b930bc200409b6915 Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Fri, 31 Jul 2009 03:22:08 +0000 Subject: 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.). --- Demos/Device/ClassDriver/GenericHID/GenericHID.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'Demos/Device/ClassDriver/GenericHID/GenericHID.c') diff --git a/Demos/Device/ClassDriver/GenericHID/GenericHID.c b/Demos/Device/ClassDriver/GenericHID/GenericHID.c index 4315723f4..9db30cebf 100644 --- a/Demos/Device/ClassDriver/GenericHID/GenericHID.c +++ b/Demos/Device/ClassDriver/GenericHID/GenericHID.c @@ -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. -- cgit v1.2.3