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Removed code to zero reports between two keyboard reports with differing number of pressed keys, as this relied on non-standard OS behaviour.

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Dean Camera
2009-11-23 05:45:59 +00:00
parent 86db035b1e
commit 6e867f7d9b
3 changed files with 8 additions and 22 deletions
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13
Demos/Device/LowLevel/Keyboard/Keyboard.c
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@@ -258,11 +258,11 @@ void EVENT_USB_Device_StartOfFrame(void)
*/
void CreateKeyboardReport(USB_KeyboardReport_Data_t* ReportData)
{
static uint8_t PrevUsedKeyCodes;
uint8_t UsedKeyCodes = 0;
uint8_t JoyStatus_LCL = Joystick_GetStatus();
uint8_t ButtonStatus_LCL = Buttons_GetStatus();
uint8_t UsedKeyCodes = 0;
/* Clear the report contents */
memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t));
@@ -281,15 +281,6 @@ void CreateKeyboardReport(USB_KeyboardReport_Data_t* ReportData)
if (ButtonStatus_LCL & BUTTONS_BUTTON1)
ReportData->KeyCode[UsedKeyCodes++] = 0x09; // F
/* The host will ignore the device if we add a new keycode to the report while another keycode is currently
* being sent (i.e. the user has pressed another key while a key is already being pressed) - we need to intersperse
* the two reports with a zeroed report to force the host to accept the additional keys */
if (UsedKeyCodes != PrevUsedKeyCodes)
{
memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t));
PrevUsedKeyCodes = UsedKeyCodes;
}
}
/** Processes a received LED report, and updates the board LEDs states to match.