+
+ /* Create a stdio stream for the serial port for stdin and stdout */
+ Serial_CreateStream(NULL);
+}
+
+/** Task to manage an enumerated USB keyboard once connected, to display key state
+ * data as it is received.
+ */
+void KeyboardHost_Task(void)
+{
+ if (USB_HostState != HOST_STATE_Configured)
+ return;
+
+ if (HID_Host_IsReportReceived(&Keyboard_HID_Interface))
+ {
+ uint8_t KeyboardReport[Keyboard_HID_Interface.State.LargestReportSize];
+ HID_Host_ReceiveReport(&Keyboard_HID_Interface, &KeyboardReport);
+
+ for (uint8_t ReportNumber = 0; ReportNumber < HIDReportInfo.TotalReportItems; ReportNumber++)
+ {
+ HID_ReportItem_t* ReportItem = &HIDReportInfo.ReportItems[ReportNumber];
+
+ /* Update the report item value if it is contained within the current report */
+ if (!(USB_GetHIDReportItemInfo(KeyboardReport, ReportItem)))
+ continue;
+
+ /* Determine what report item is being tested, process updated value as needed */
+ if ((ReportItem->Attributes.Usage.Page == USAGE_PAGE_KEYBOARD) &&
+ (ReportItem->Attributes.BitSize == 8) &&
+ (ReportItem->Attributes.Logical.Maximum > 1) &&
+ (ReportItem->ItemType == HID_REPORT_ITEM_In))
+ {
+ /* Key code is an unsigned char in length, cast to the appropriate type */
+ uint8_t KeyCode = (uint8_t)ReportItem->Value;
+
+ /* If scan-code is non-zero, a key is being pressed */
+ if (KeyCode)
+ {
+ /* Toggle status LED to indicate keypress */
+ LEDs_ToggleLEDs(LEDS_LED2);
+
+ char PressedKey = 0;
+
+ /* Convert scan-code to printable character if alphanumeric */
+ if ((KeyCode >= HID_KEYBOARD_SC_A) && (KeyCode <= HID_KEYBOARD_SC_Z))
+ {
+ PressedKey = (KeyCode - HID_KEYBOARD_SC_A) + 'A';
+ }
+ else if ((KeyCode >= HID_KEYBOARD_SC_1_AND_EXCLAMATION) &
+ (KeyCode < HID_KEYBOARD_SC_0_AND_CLOSING_PARENTHESIS))
+ {
+ PressedKey = (KeyCode - HID_KEYBOARD_SC_1_AND_EXCLAMATION) + '1';
+ }
+ else if (KeyCode == HID_KEYBOARD_SC_0_AND_CLOSING_PARENTHESIS)
+ {
+ PressedKey = '0';
+ }
+ else if (KeyCode == HID_KEYBOARD_SC_SPACE)
+ {
+ PressedKey = ' ';
+ }
+ else if (KeyCode == HID_KEYBOARD_SC_ENTER)
+ {
+ PressedKey = '\n';
+ }
+
+ /* Print the pressed key character out through the serial port if valid */
+ if (PressedKey)
+ putchar(PressedKey);
+ }
+
+ /* Once a scan-code is found, stop scanning through the report items */
+ break;
+ }
+ }
+ }
projects / pub / USBasp.git / blobdiff