diff options
Diffstat (limited to 'Demos/Device/ClassDriver')
| -rw-r--r-- | Demos/Device/ClassDriver/Keyboard/Keyboard.c | 24 | ||||
| -rw-r--r-- | Demos/Device/ClassDriver/Keyboard/Keyboard.txt | 11 |
2 files changed, 24 insertions, 11 deletions
diff --git a/Demos/Device/ClassDriver/Keyboard/Keyboard.c b/Demos/Device/ClassDriver/Keyboard/Keyboard.c index ea373a802..2918f5a67 100644 --- a/Demos/Device/ClassDriver/Keyboard/Keyboard.c +++ b/Demos/Device/ClassDriver/Keyboard/Keyboard.c @@ -144,22 +144,34 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn uint8_t JoyStatus_LCL = Joystick_GetStatus();
uint8_t ButtonStatus_LCL = Buttons_GetStatus();
+ static uint8_t PrevUsedKeyCodes;
+ uint8_t UsedKeyCodes = 0;
+
if (JoyStatus_LCL & JOY_UP)
- KeyboardReport->KeyCode[0] = 0x04; // A
+ KeyboardReport->KeyCode[UsedKeyCodes++] = 0x04; // A
else if (JoyStatus_LCL & JOY_DOWN)
- KeyboardReport->KeyCode[0] = 0x05; // B
+ KeyboardReport->KeyCode[UsedKeyCodes++] = 0x05; // B
if (JoyStatus_LCL & JOY_LEFT)
- KeyboardReport->KeyCode[0] = 0x06; // C
+ KeyboardReport->KeyCode[UsedKeyCodes++] = 0x06; // C
else if (JoyStatus_LCL & JOY_RIGHT)
- KeyboardReport->KeyCode[0] = 0x07; // D
+ KeyboardReport->KeyCode[UsedKeyCodes++] = 0x07; // D
if (JoyStatus_LCL & JOY_PRESS)
- KeyboardReport->KeyCode[0] = 0x08; // E
+ KeyboardReport->KeyCode[UsedKeyCodes++] = 0x08; // E
if (ButtonStatus_LCL & BUTTONS_BUTTON1)
- KeyboardReport->KeyCode[0] = 0x09; // F
+ KeyboardReport->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(KeyboardReport, sizeof(USB_KeyboardReport_Data_t), 0x00);
+ PrevUsedKeyCodes = UsedKeyCodes;
+ }
+
*ReportSize = sizeof(USB_KeyboardReport_Data_t);
return false;
}
diff --git a/Demos/Device/ClassDriver/Keyboard/Keyboard.txt b/Demos/Device/ClassDriver/Keyboard/Keyboard.txt index b1f5c2b53..89dde8305 100644 --- a/Demos/Device/ClassDriver/Keyboard/Keyboard.txt +++ b/Demos/Device/ClassDriver/Keyboard/Keyboard.txt @@ -49,11 +49,12 @@ * OSes (i.e. no special drivers required). It is boot protocol compatible, and thus
* works under compatible BIOS as if it was a native keyboard (e.g. PS/2).
*
- * On start-up the system will automatically enumerate and function
- * as a keyboard when the USB connection to a host is present. To use
- * the keyboard example, manipulate the joystick to send the letters
- * a, b, c, d and e. See the USB HID documentation for more information
- * on sending keyboard event and key presses.
+ * On start-up the system will automatically enumerate and function as a keyboard
+ * when the USB connection to a host is present. To use the keyboard example,
+ * manipulate the joystick to send the letters a, b, c, d and e. See the USB HID
+ * documentation for more information on sending keyboard event and key presses. Unlike
+ * other LUFA Keyboard demos, this example shows explicitly how to send multiple keypresses
+ * inside the same report to the host.
*
* \section SSec_Options Project Options
*
|