/*************************************************************************
* Function: ManageDemoState
*
* Preconditions: The DemoState global variable must be initialized to
* DEMO_STATE_IDLE (0). (This occurs on reset.)
*
* Input: DemoState (global)
* Actions selected based value of DemoState on function
* entry.
*
* deviceAddress (global)
* May use device address to access device, depending on
* state.
*
* DataPacket (global)
* May read data from packet buffer, depending on state.
*
* Output: DemoState (global)
* Updates demo state as appropriate.
*
* DataPacket (global)
* May cause data in the packet buffer to be updated,
* depending on state.
*
* Returns: None
*
* Side Effects: Depend on state transition
*
* Overview: This routine maintains the state of the application,
* updateing global data and taking actions as necessary
* to maintain the custom demo operations.
*************************************************************************/
void ManageDemoState ( void )
{
BYTE RetVal;
BlinkStatus();
// Watch for device timeouts
// if (MSTimerGetTime() > DEMO_TIMEOUT_LIMIT)
// {
// if (DemoState == DEMO_STATE_IDLE)
// {
// LCDWriteLine( 2, "Awaiting Device" );
// }
// else
// {
// UART2PrintString( "Device Time-out Error!\r\n" );
// LCDWriteLine( 2, "Dev Time-out Err" );
// DemoState = DEMO_STATE_ERROR;
// }
// }
// Watch for device detaching
if (USBHostGenericDeviceDetached(deviceAddress) && deviceAddress != 0)
{
UART2PrintString( "Generic demo device detached - polled\r\n" );
DemoState = DEMO_INITIALIZE;
deviceAddress = 0;
}
switch (DemoState)
{
case DEMO_INITIALIZE:
InitLcdMessage();
DemoState = DEMO_STATE_IDLE;
break;
/** Idle State: Loops here until attach **/
case DEMO_STATE_IDLE:
if (CheckForNewAttach())
{
DemoState = DEMO_STATE_GET_DEV_VERSION;
}
break;
/** Sequence: Read Dev FW Version **/
case DEMO_STATE_GET_DEV_VERSION:
// Send the Read Version command
DataPacket.CMD = READ_VERSION;
DataPacket.len = 2;
if (!USBHostGenericTxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericWrite(deviceAddress, &DataPacket, 2)) == USB_SUCCESS )
{
DemoState = DEMO_STATE_WAITING_VER_REQ;
}
else
{
UART2PrintString( "1 Device Write Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Write Error " );
}
}
break;
case DEMO_STATE_WAITING_VER_REQ:
if (!USBHostGenericTxIsBusy(deviceAddress) )
DemoState = DEMO_STATE_READ_DEV_VERSION;
break;
case DEMO_STATE_READ_DEV_VERSION:
if (!USBHostGenericRxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericRead(deviceAddress, &DataPacket, 4)) == USB_SUCCESS )
{
DemoState = DEMO_STATE_WAITING_READ_VER;
}
else
{
UART2PrintString( "1 Device Read Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Read Error " );
}
}
break;
case DEMO_STATE_WAITING_READ_VER:
if (!USBHostGenericRxIsBusy(deviceAddress))
DemoState = DEMO_STATE_VERIFY_DEV_FW_VER;
break;
case DEMO_STATE_VERIFY_DEV_FW_VER:
if (ValidateAndDisplayDeviceFwVersion())
DemoState = DEMO_STATE_GET_TEMPERATURE;
else
DemoState = DEMO_STATE_ERROR;
break;
/** Sequence: Read Temperature Sensor Data **/
case DEMO_STATE_GET_TEMPERATURE:
// Send the Read Temperature command
DataPacket.CMD = RD_TEMP;
DataPacket.len = 2;
if (!USBHostGenericTxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericWrite(deviceAddress, &DataPacket, 2)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_GET_TEMP;
}
else
{
UART2PrintString( "2 Device Write Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Write Error " );
}
}
break;
case DEMO_STATE_WAITING_GET_TEMP:
if (!USBHostGenericTxIsBusy(deviceAddress) )
{
DemoState = DEMO_STATE_READ_TEMPERATURE;
}
break;
case DEMO_STATE_READ_TEMPERATURE:
if (!USBHostGenericRxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericRead(deviceAddress, &DataPacket, 3)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_READ_TEMP;
}
else
{
UART2PrintString( "2 Device Read Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Read Error " );
}
}
break;
case DEMO_STATE_WAITING_READ_TEMP:
if (!USBHostGenericRxIsBusy(deviceAddress))
{
DemoState = DEMO_STATE_DISPLAY_TEMPERATURE;
}
break;
case DEMO_STATE_DISPLAY_TEMPERATURE:
DisplayTemperature();
DemoState = DEMO_STATE_GET_POT;
break;
/** Sequence: Read POT Sensor Data **/
case DEMO_STATE_GET_POT:
// Send the Read POT command
DataPacket.CMD = RD_POT;
DataPacket.len = 2;
if (!USBHostGenericTxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericWrite(deviceAddress, &DataPacket, 2)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_GET_POT;
}
else
{
UART2PrintString( "3 Device Write Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Write Error " );
}
}
break;
case DEMO_STATE_WAITING_GET_POT:
if (!USBHostGenericTxIsBusy(deviceAddress) )
DemoState = DEMO_STATE_READ_POT;
break;
case DEMO_STATE_READ_POT:
if (!USBHostGenericRxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericRead(deviceAddress, &DataPacket, 3)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_READ_POT;
}
else
{
UART2PrintString( "3 Device Read Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Read Error " );
}
}
break;
case DEMO_STATE_WAITING_READ_POT:
if (!USBHostGenericRxIsBusy(deviceAddress))
DemoState = DEMO_STATE_DISPLAY_POT;
break;
case DEMO_STATE_DISPLAY_POT:
DisplayPot();
DemoState = DEMO_STATE_SEND_SET_LED;
break;
/** Sequence: Update LEDs **/
case DEMO_STATE_SEND_SET_LED:
// Send the set-LED command
DataPacket.CMD = UPDATE_LED;
DataPacket.len = 3;
if (Switch3WasPressed())
{
DataPacket.led_num = 3; // LED 3 on original PIC18 FS USB board
DataPacket.led_status = LEDState.bits.b3 ^ 1;
}
else if (Switch6WasPressed())
{
DataPacket.led_num = 4; // LED 4 on original PIC18 FS USB board
DataPacket.led_status = LEDState.bits.b4 ^ 1;
}
else
{
DemoState = DEMO_STATE_GET_TEMPERATURE;
break;
}
if (!USBHostGenericTxIsBusy(deviceAddress))
{
if ( (RetVal=USBHostGenericWrite(deviceAddress, &DataPacket, 3)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_SET_LED;
}
else
{
UART2PrintString( "4 Device Write Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Write Error " );
}
}
break;
case DEMO_STATE_WAITING_SET_LED:
if (!USBHostGenericTxIsBusy(deviceAddress) )
DemoState = DEMO_STATE_READ_SET_LED_RESP;
break;
case DEMO_STATE_READ_SET_LED_RESP:
if (!USBHostGenericRxIsBusy(deviceAddress))
{
DataPacket.CMD = CMD_INVALID;
if ( (RetVal=USBHostGenericRead(deviceAddress, &DataPacket, 1)) == USB_SUCCESS)
{
DemoState = DEMO_STATE_WAITING_LED_RESP;
}
else
{
UART2PrintString( "4 Device Read Error 0x" );
UART2PutHex(RetVal);
UART2PrintString( "\r\n" );
LCDWriteLine( 2, "Dev Read Error " );
}
}
break;
case DEMO_STATE_WAITING_LED_RESP:
if (!USBHostGenericRxIsBusy(deviceAddress))
DemoState = DEMO_STATE_UPDATE_LED_STATE;
break;
case DEMO_STATE_UPDATE_LED_STATE:
if (DataPacket.CMD == UPDATE_LED) // CMD updated by read from device
{
if (DataPacket.led_num == 3) // led_num left-over from set-LED command send
{
LEDState.bits.b3 ^= 1;
// mLED_10_Toggle();
}
else if (DataPacket.led_num == 4)
{
LEDState.bits.b4 ^= 1;
// mLED_9_Toggle();
}
}
DemoState = DEMO_STATE_GET_TEMPERATURE;
break;
/** Error state: Hold here until detached **/
case DEMO_STATE_ERROR: // To Do: Flash LEDs
break;
default:
DemoState = DEMO_INITIALIZE;
break;
}
DelayMs(1); // 1ms delay
} // ManageDemoState
uint8_t ChipKITUSBGenericHost::Read( uint8_t deviceAddress, void *buffer, DWORD length)
{
return(USBHostGenericRead(deviceAddress, buffer, length));
}
