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USB bulk device

Mathieu L.
Expert 1630 points

Hi, this is the code from the tivaware example of USB bulk device:

FPULazyStackingEnable();
SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN);
IntMasterEnable();
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
PIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3|GPIO_PIN_2);
g_bUSBConfigured = false;
	
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
	
GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
		
SysTickPeriodSet(SysCtlClockGet() / SYSTICKS_PER_SECOND);
SysTickIntEnable();
SysTickEnable();
   
		 
USBBufferInit(&g_sTxBuffer);
USBBufferInit(&g_sRxBuffer);
USBStackModeSet(0, eUSBModeDevice, 0);
USBDBulkInit(0, &g_sBulkDevice);

Here my TX function:

g_bUSBConfigured = true;
//
// Flush our buffers.
//
//
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3);

  
             
USBBufferFlush(&g_sTxBuffer);
USBBufferFlush(&g_sRxBuffer);

I am wondering why the Kit doesn t get into USB when i switched it to Device mode, the green led doesn t light.

I got all the proper drivers install and i got the bulk example window side cmd prompt application. Actually, I manage to transform the kit into a transmitter

from the stellarisware example therefore I know that the "old" code is working.  But now I need to use Tivaware.

Any suggesiton?

Mathieu L.