__attribute__((critical)) int16_t usb_printf(const char * fmt, ...) {
if(usb_printf_state == USB_DISABLED) return -1;
if(usb_printf_state == USB_LOCKED) return -1;
usb_printf_state = USB_LOCKED;
int16_t len;
va_list args;
va_start(args, fmt);
char msg[64];
len = vsnprintf(msg, 64, fmt, args);
cdcSendDataWaitTilDone((BYTE*) msg,
len, CDC0_INTFNUM, 1);
va_end(args);
usb_printf_state = USB_ENABLED;
return len;
}
VOID main(VOID)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
Init_StartUp(); //initialize device
USB_init();
USB_setEnabledEvents(USBEVIE);
// See if we're already attached physically to USB, and if so, connect to it
// Normally applications don't invoke the event handlers, but this is an exception.
if (USB_connectionInfo() & kUSB_vbusPresent)
USB_handleVbusOnEvent();
while(1)
{
switch(USB_connectionState())
{
case ST_USB_DISCONNECTED:
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/interrupt
_NOP();
break;
case ST_USB_CONNECTED_NO_ENUM:
break;
case ST_ENUM_ACTIVE:
__bis_SR_register(LPM0_bits + GIE); // Enter LPM0 until an event occurs.
// This flag would have been set by the handleDataReceived event; this event is only enabled when waiting
// for 'press any key'
if(bCDCDataReceived_event)
{
bCDCDataReceived_event = FALSE;
// Change the event flags, in preparation for receiving 1K data
USBEVIE &= ~kUSB_dataReceivedEvent; // No more data-received. We only used this for 'press any key'
USBEVIE |= kUSB_receiveCompletedEvent; // But enable receive-completed; we want to be prompted when 1K data has been received
USB_setEnabledEvents(USBEVIE);
USBCDC_rejectData(0); // We don't care what char the key-press was
// Prompt user for 1K data
strcpy(outString,"I'm ready to receive 1K of data.\r\n"); // Prepare the outgoing string
if(cdcSendDataWaitTilDone((BYTE*)outString,strlen(outString),0,0)) // Send it over USB
{
USBCDC_abortSend(&x,0); // It failed for some reason; abort and leave the main loop
break;
}
// Set up rcv operation for 1K data
if(USBCDC_receiveData(dataBuff,1024,0) == kUSBCDC_busNotAvailable) //first USBCDC_receiveData
{
USBCDC_abortReceive(&x,0); // It failed because of surprise removal or suspended by host;
break; // abort and leave the main loop
}
}
// This flag would have been set by the handleReceiveCompleted event; this event is only enabled
// while receiving 1K data, and signals that all 1K has been received
if(bDataReceiveCompleted_event)
{
bDataReceiveCompleted_event = FALSE;
strcpy(outString,"Thanks for the data.\r\n"); // Prepare the outgoing string
if(cdcSendDataInBackground((BYTE*)outString,strlen(outString),0,0)) //Send the response over USB
{
USBCDC_abortSend(&x,0); // It failed for some reason; abort and leave the main loop
break;
}
// Change the event flags, in preparation for 'press any key'
USBEVIE &= ~kUSB_receiveCompletedEvent; // No more receive-completed.
USBEVIE |= kUSB_dataReceivedEvent; // This will tell us that data -- any data -- has arrived (i.e., a key-press)
USB_setEnabledEvents(USBEVIE);
}
break;
case ST_ENUM_SUSPENDED:
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/ interrupts
_NOP();
break;
case ST_ENUM_IN_PROGRESS:
break;
case ST_NOENUM_SUSPENDED:
__bis_SR_register(LPM3_bits + GIE);
_NOP();
break;
case ST_ERROR:
_NOP();
break;
default:;
}
} // while(1)
} //main()
/*----------------------------------------------------------------------------+
| Main Routine |
+----------------------------------------------------------------------------*/
VOID main(VOID)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
Init_StartUp();
USB_init();
USB_setEnabledEvents(kUSB_VbusOnEvent+kUSB_VbusOffEvent+kUSB_dataReceivedEvent+kUSB_UsbSuspendEvent+kUSB_UsbResumeEvent+kUSB_UsbResetEvent);
// Pre-fill the buffers with visible ASCII characters (0x21 to 0x7E)
for(w=0;w<MEGA_DATA_LENGTH;w++)
{
dataBuf[w] = y++;
if(y>0x7E)
y = 0x21;
}
// Check if we're already physically attached to USB, and if so, connect to it
// This is the same function that gets called automatically when VBUS gets attached.
if (USB_connectionInfo() & kUSB_vbusPresent)
USB_handleVbusOnEvent();
while(1)
{
switch(USB_connectionState())
{
case ST_USB_DISCONNECTED:
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/interrupt
break;
case ST_USB_CONNECTED_NO_ENUM:
break;
case ST_ENUM_ACTIVE:
if(!bCDCDataReceived_event) // Do this until a key is pressed
{
strcpy(outString,"Press any key.\r"); // Prepare the outgoing string
if(cdcSendDataWaitTilDone((BYTE*)outString,strlen(outString),0,0)) // Send it; no timeout
{
USBCDC_abortSend(&x,0); // Operation may still be open; cancel it
break;
}
}
else
{
bCDCDataReceived_event = FALSE;
USBCDC_rejectData(0);
for(rounds=0;rounds<600;rounds++)
{
if(cdcSendDataWaitTilDone(dataBuf,MEGA_DATA_LENGTH,0,0)) // Send all of RAM
{
USBCDC_abortSend(&x,0); // Operation probably still open; cancel it
break;
}
}
strcpy(outString,"\r\n\r\n\r\nThe test is completed.\r\n"); // Prepare the outgoing string
if(cdcSendDataWaitTilDone((BYTE*)outString,strlen(outString),0,0)) // Send it; no timeout
{
USBCDC_abortSend(&x,0); // Operation may still be open; cancel it
break;
}
}
break;
case ST_ENUM_SUSPENDED:
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/interrupt
break;
case ST_ENUM_IN_PROGRESS:
break;
case ST_NOENUM_SUSPENDED:
__bis_SR_register(LPM3_bits + GIE);
_NOP();
break;
case ST_ERROR:
_NOP();
break;
default:;
}
} // while(1)
} //main()
