diff options
Diffstat (limited to 'Demos/KeyboardHost/KeyboardHost.c')
| -rw-r--r-- | Demos/KeyboardHost/KeyboardHost.c | 118 |
1 files changed, 79 insertions, 39 deletions
diff --git a/Demos/KeyboardHost/KeyboardHost.c b/Demos/KeyboardHost/KeyboardHost.c index 74d65550e..6249e5291 100644 --- a/Demos/KeyboardHost/KeyboardHost.c +++ b/Demos/KeyboardHost/KeyboardHost.c @@ -176,6 +176,56 @@ void UpdateStatus(uint8_t CurrentStatus) LEDs_SetAllLEDs(LEDMask);
}
+/** Reads in and processes the next report from the attached device, displaying the report
+ * contents on the board LEDs and via the serial port.
+ */
+void ReadNextReport(void)
+{
+ USB_KeyboardReport_Data_t KeyboardReport;
+
+ /* Select the keyboard report data in pipe */
+ Pipe_SelectPipe(KEYBOARD_DATAPIPE);
+
+ /* Ensure pipe contains data and is ready to be read before continuing */
+ if (!(Pipe_ReadWriteAllowed()))
+ return;
+
+ /* Read in keyboard report data */
+ Pipe_Read_Stream_LE(&KeyboardReport, sizeof(KeyboardReport));
+
+ /* Clear the IN endpoint, ready for next data packet */
+ Pipe_ClearCurrentBank();
+
+ /* Indicate if the modifier byte is non-zero (special key such as shift is being pressed) */
+ LEDs_ChangeLEDs(LEDS_LED1, (KeyboardReport.Modifier) ? LEDS_LED1 : 0);
+
+ /* Check if a key has been pressed */
+ if (KeyboardReport.KeyCode)
+ {
+ /* Toggle status LED to indicate keypress */
+ if (LEDs_GetLEDs() & LEDS_LED2)
+ LEDs_TurnOffLEDs(LEDS_LED2);
+ else
+ LEDs_TurnOnLEDs(LEDS_LED2);
+
+ char PressedKey = 0;
+
+ /* Retrieve pressed key character if alphanumeric */
+ if ((KeyboardReport.KeyCode >= 0x04) && (KeyboardReport.KeyCode <= 0x1D))
+ PressedKey = (KeyboardReport.KeyCode - 0x04) + 'A';
+ else if ((KeyboardReport.KeyCode >= 0x1E) && (KeyboardReport.KeyCode <= 0x27))
+ PressedKey = (KeyboardReport.KeyCode - 0x1E) + '0';
+ else if (KeyboardReport.KeyCode == 0x2C)
+ PressedKey = ' ';
+ else if (KeyboardReport.KeyCode == 0x28)
+ PressedKey = '\n';
+
+ /* Print the pressed key character out through the serial port if valid */
+ if (PressedKey)
+ putchar(PressedKey);
+ }
+}
+
/** Task to set the configuration of the attached device after it has been enumerated, and to read and process
* HID reports from the device and display the results onto the board LEDs.
*/
@@ -261,54 +311,44 @@ TASK(USB_Keyboard_Host) USB_HostState = HOST_STATE_Ready;
break;
+ #if !defined(INTERRUPT_DATA_PIPE)
case HOST_STATE_Ready:
/* Select and unfreeze keyboard data pipe */
Pipe_SelectPipe(KEYBOARD_DATAPIPE);
Pipe_Unfreeze();
- /* Check if data has been received from the attached keyboard */
+ /* If a report has been received, read and process it */
if (Pipe_ReadWriteAllowed())
- {
- USB_KeyboardReport_Data_t KeyboardReport;
-
- /* Read in keyboard report data */
- Pipe_Read_Stream_LE(&KeyboardReport, sizeof(KeyboardReport));
-
- /* Clear the IN endpoint, ready for next data packet */
- Pipe_ClearCurrentBank();
-
- /* Indicate if the modifier byte is non-zero */
- LEDs_ChangeLEDs(LEDS_LED1, (KeyboardReport.Modifier) ? LEDS_LED1 : 0);
-
- /* Check if a key has been pressed */
- if (KeyboardReport.KeyCode)
- {
- /* Toggle status LED to indicate keypress */
- if (LEDs_GetLEDs() & LEDS_LED2)
- LEDs_TurnOffLEDs(LEDS_LED2);
- else
- LEDs_TurnOnLEDs(LEDS_LED2);
-
- char PressedKey = 0;
-
- /* Retrieve pressed key character if alphanumeric */
- if ((KeyboardReport.KeyCode >= 0x04) && (KeyboardReport.KeyCode <= 0x1D))
- PressedKey = (KeyboardReport.KeyCode - 0x04) + 'A';
- else if ((KeyboardReport.KeyCode >= 0x1E) && (KeyboardReport.KeyCode <= 0x27))
- PressedKey = (KeyboardReport.KeyCode - 0x1E) + '0';
- else if (KeyboardReport.KeyCode == 0x2C)
- PressedKey = ' ';
- else if (KeyboardReport.KeyCode == 0x28)
- PressedKey = '\n';
-
- /* Print the pressed key character out through the serial port if valid */
- if (PressedKey)
- putchar(PressedKey);
- }
- }
+ ReadNextReport();
/* Freeze keyboard data pipe */
Pipe_Freeze();
break;
+ #endif
+ }
+}
+
+#if defined(INTERRUPT_DATA_PIPE)
+/** Interrupt handler for the Endpoint/Pipe interrupt vector. This interrupt fires each time an enabled
+ * pipe interrupt occurs on a pipe which has had that interrupt enabled.
+ */
+ISR(ENDPOINT_PIPE_vect, ISR_BLOCK)
+{
+ /* Check to see if the keyboard data pipe has caused the interrupt */
+ if (Pipe_HasPipeInterrupted(KEYBOARD_DATAPIPE))
+ {
+ /* Clear the pipe interrupt, and select the keyboard pipe */
+ Pipe_ClearPipeInterrupt(KEYBOARD_DATAPIPE);
+ Pipe_SelectPipe(KEYBOARD_DATAPIPE);
+
+ /* Check to see if the pipe IN interrupt has fired */
+ if (USB_INT_HasOccurred(PIPE_INT_IN) && USB_INT_IsEnabled(PIPE_INT_IN))
+ {
+ /* Clear interrupt flag */
+ USB_INT_Clear(PIPE_INT_IN);
+
+ /* Read and process the next report from the device */
+ ReadNextReport();
}
}
+#endif
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