//*****************************************************************************
//
// This is the generic callback from host stack.
//
// pvData is actually a pointer to a tEventInfo structure.
//
// This function will be called to inform the application when a USB event has
// occurred that is outside those related to the keyboard device. At this
// point this is used to detect unsupported devices being inserted and removed.
// It is also used to inform the application when a power fault has occurred.
// This function is required when the g_USBGenericEventDriver is included in
// the host controller driver array that is passed in to the
// USBHCDRegisterDrivers() function.
//
//*****************************************************************************
void
USBHCDEvents(void *pvData)
{
tEventInfo *pEventInfo;
//
// Cast this pointer to its actual type.
//
pEventInfo = (tEventInfo *)pvData;
switch(pEventInfo->ui32Event)
{
case USB_EVENT_UNKNOWN_CONNECTED:
case USB_EVENT_CONNECTED:
{
//
// Save the device instance data.
//
g_sStatus.ui32Instance = pEventInfo->ui32Instance;
g_sStatus.bConnected = true;
//
// Update the port status for the new device.
//
UIUpdateStatus();
break;
}
//
// A device has been unplugged.
//
case USB_EVENT_DISCONNECTED:
{
//
// Device is no longer connected.
//
g_sStatus.bConnected = false;
//
// Update the port status for the new device.
//
UIUpdateStatus();
break;
}
default:
{
break;
}
}
}
//****************************************************************************
//
// Application calls this once to initialize the UI.
//
//****************************************************************************
void
UIInit(void)
{
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "usb-dev-chid");
WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sBackground);
WidgetPaint((tWidget *)&g_sBackground);
//
// Initially not connected.
//
g_eState = UI_NOT_CONNECTED;
//
// Not initialized.
//
UIUpdateStatus(UI_STATUS_UPDATE);
}
//*****************************************************************************
//
// Initialize the application interface.
//
//*****************************************************************************
void
UIInit(uint32_t ui32SysClock)
{
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "usb-host-mouse");
//
// Set the font for the application.
//
GrContextFontSet(&g_sContext, g_psFontFixed6x8);
//
// Default to device type not yet updated.
//
g_bTypeUpdated = false;
//
// Initial update of the screen.
//
UIUpdateStatus();
}
//****************************************************************************
//
// Called by the mode toggle button in the g_sToggle variable.
//
//****************************************************************************
static void
ToggleMode(tWidget *psWidget)
{
if(g_eState == UI_CONNECTED)
{
UIUpdateStatus(g_sUIState.ui32Indicators ^ UI_STATUS_KEYBOARD);
}
}
//*****************************************************************************
//
// Initialize the application interface.
//
//*****************************************************************************
void
UIInit(uint32_t ui32SysClock)
{
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "usb-host-keyboard");
//
// Set the font for the application.
//
GrContextFontSet(&g_sContext, g_psFontFixed6x8);
//
// Calculate the number of characters that will fit on a line.
// Make sure to leave a small border for the text box.
//
g_ui32CharsPerLine = (GrContextDpyWidthGet(&g_sContext) - 16) /
GrFontMaxWidthGet(g_psFontFixed6x8);
//
// Calculate the number of lines per usable text screen. This requires
// taking off space for the top and bottom banners and adding a small bit
// for a border.
//
g_ui32LinesPerScreen = (GrContextDpyHeightGet(&g_sContext) -
(2*(DISPLAY_BANNER_HEIGHT + 1)) -
BUTTON_HEIGHT) / GrFontHeightGet(g_psFontFixed6x8);
//
// Set up the text scrolling variables.
//
g_ui32CurrentLine = 0;
g_ui32EntryLine = 0;
//
// Draw the initial prompt on the screen.
//
DrawPrompt();
//
// Initial update of the screen.
//
UIUpdateStatus();
}
void
UIMode(tUIState eState)
{
if(g_eState != UI_CONNECTED)
{
if(eState == UI_CONNECTED)
{
UIUpdateStatus(g_sUIState.ui32Indicators | UI_STATUS_UPDATE);
}
}
else if(g_eState == UI_CONNECTED)
{
if(eState == UI_NOT_CONNECTED)
{
UIUpdateStatus(g_sUIState.ui32Indicators & ~UI_STATUS_UPDATE);
}
}
g_eState = eState;
UIUpdateStatus(g_sUIState.ui32Indicators);
}
//*****************************************************************************
//
// The main routine for handling the USB keyboard.
//
//*****************************************************************************
void
KeyboardMain(void)
{
switch(g_iKeyboardState)
{
//
// This state is entered when they keyboard is first detected.
//
case eStateKeyboardInit:
{
//
// Initialized the newly connected keyboard.
//
USBHKeyboardInit(g_psKeyboard);
//
// Proceed to the keyboard connected state.
//
g_iKeyboardState = eStateKeyboardConnected;
//
// Set the current state of the modifiers.
//
USBHKeyboardModifierSet(g_psKeyboard, g_sStatus.ui32Modifiers);
break;
}
case eStateKeyboardUpdate:
{
//
// If the application detected a change that required an
// update to be sent to the keyboard to change the modifier
// state then call it and return to the connected state.
//
g_iKeyboardState = eStateKeyboardConnected;
USBHKeyboardModifierSet(g_psKeyboard, g_sStatus.ui32Modifiers);
//
// Update the modifier status.
//
UIUpdateStatus();
break;
}
case eStateKeyboardConnected:
default:
{
break;
}
}
}