@ -45,6 +45,9 @@ volatile uint8_t TxPulseMSRemaining = 0;
/** Counter for the number of milliseconds remaining for the RX activity LED pulse being generated. */
volatile uint8_t RxPulseMSRemaining = 0 ;
/** Counter for the number of milliseconds remaining for the enumeration LED ping-pong being generated. */
volatile uint8_t PingPongMSRemaining = 0 ;
/** LUFA CDC Class driver interface configuration and state information. This structure is
* passed to all CDC Class driver functions , so that multiple instances of the same class
* within a device can be differentiated from one another .
@ -78,8 +81,6 @@ int main(void)
{
SetupHardware ( ) ;
LEDs_SetAllLEDs ( LEDMASK_USB_NOTREADY ) ;
for ( ; ; )
{
/* Echo bytes from the host to the target via the hardware USART */
@ -103,10 +104,20 @@ int main(void)
/* Check if the millisecond timer has elapsed */
if ( TIFR0 & ( 1 < < OCF0A ) )
{
/* Check if the LEDs should be ping-ponging (during enumeration) */
if ( PingPongMSRemaining & & ! ( - - PingPongMSRemaining ) )
{
LEDs_ChangeLEDs ( LEDMASK_BUSY , ( ~ LEDs_GetLEDs ( ) & LEDMASK_BUSY ) ) ;
PingPongMSRemaining = PING_PONG_LED_PULSE_MS ;
}
/* Check if the reset pulse period has elapsed, if so tristate the target reset line */
if ( ResetPulseMSRemaining & & ! ( - - ResetPulseMSRemaining ) )
AVR_RESET_LINE_DDR & = ~ AVR_RESET_LINE_MASK ;
{
LEDs_TurnOffLEDs ( LEDMASK_BUSY ) ;
AVR_RESET_LINE_DDR & = ~ AVR_RESET_LINE_MASK ;
}
/* Turn off TX LED(s) once the TX pulse period has elapsed */
if ( TxPulseMSRemaining & & ! ( - - TxPulseMSRemaining ) )
LEDs_TurnOffLEDs ( LEDMASK_TX ) ;
@ -151,22 +162,25 @@ void SetupHardware(void)
/** Event handler for the library USB Connection event. */
void EVENT_USB_Connect ( void )
{
LEDs_SetAllLEDs ( LEDMASK_USB_ENUMERATING ) ;
PingPongMSRemaining = PING_PONG_LED_PULSE_MS ;
LEDs_SetAllLEDs ( LEDMASK_TX ) ;
}
/** Event handler for the library USB Disconnection event. */
void EVENT_USB_Disconnect ( void )
{
LEDs_SetAllLEDs ( LEDMASK_USB_NOTREADY ) ;
PingPongMSRemaining = 0 ;
LEDs_TurnOffLEDs ( LEDMASK_BUSY ) ;
}
/** Event handler for the library USB Configuration Changed event. */
void EVENT_USB_ConfigurationChanged ( void )
{
LEDs_SetAllLEDs ( LEDMASK_USB_READY ) ;
PingPongMSRemaining = 0 ;
LEDs_TurnOffLEDs ( LEDMASK_BUSY ) ;
if ( ! ( CDC_Device_ConfigureEndpoints ( & VirtualSerial_CDC_Interface ) ) )
LEDs_ SetAllLEDs( LEDMASK_USB _ERROR) ;
LEDs_ TurnOnLEDs( LEDMASK _ERROR) ;
}
/** Event handler for the library USB Unhandled Control Packet event. */
@ -224,6 +238,8 @@ void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const C
/* Check if the DTR line has been asserted - if so, start the target AVR's reset pulse */
if ( CDCInterfaceInfo - > State . ControlLineStates . HostToDevice & CDC_CONTROL_LINE_OUT_DTR )
{
LEDs_TurnOnLEDs ( LEDMASK_BUSY ) ;
AVR_RESET_LINE_DDR | = AVR_RESET_LINE_MASK ;
ResetPulseMSRemaining = AVR_RESET_PULSE_MS ;
}
Dean Camera
17 years ago