uint8_t USB_init(void)
{
__disable_interrupt(); // Disable global interrupts
// configuration of USB module
USBKEYPID = 0x9628; // set KEY and PID to 0x9628 -> access to configuration registers enabled
USBPHYCTL = PUSEL; // use DP and DM as USB terminals
USBPWRCTL = VUSBEN + SLDOEN + SLDOAON; // enable primary and secondary LDO (3.3 and 1.8 V)
{
volatile unsigned int i;
for (i =0; i < 1000; i++); // wait some time for LDOs
}
USBPWRCTL = VUSBEN + SLDOEN + SLDOAON + VBONIE; // enable interrupt VBUSon
USBKEYPID = 0x9600; // access to configuration registers disabled
//init Serial Number
#if (USB_STR_INDEX_SERNUM != 0)
USB_InitSerialStringDescriptor();
#endif
// init memcpy() function: DMA or non-DMA
USB_initMemcpy();
__enable_interrupt(); // enable global interrupts
return kUSB_succeed;
}
//----------------------------------------------------------------------------
BYTE USB_init(VOID)
{
WORD bGIE = __get_SR_register() &GIE; //save interrupt status
// atomic operation - disable interrupts
__disable_interrupt(); // Disable global interrupts
// configuration of USB module
USBKEYPID = 0x9628; // set KEY and PID to 0x9628 -> access to configuration registers enabled
USBPHYCTL = PUSEL; // use DP and DM as USB terminals (not needed because an external PHY is connected to port 9)
USBPWRCTL = VUSBEN + SLDOAON; // enable primary and secondary LDO (3.3 and 1.8 V)
{
volatile unsigned int i;
for (i =0; i < USB_MCLK_FREQ/1000*2/10; i++); // wait some time for LDOs (1ms delay)
}
USBPWRCTL = VUSBEN + SLDOAON + VBONIE; // enable interrupt VBUSon
USBKEYPID = 0x9600; // access to configuration registers disabled
//reset events mask
wUsbEventMask = 0;
//init Serial Number
#if (USB_STR_INDEX_SERNUM != 0)
USB_InitSerialStringDescriptor();
#endif
// init memcpy() function: DMA or non-DMA
USB_initMemcpy();
#ifdef _MSC_
MscResetCtrlLun();
#endif
__bis_SR_register(bGIE); //restore interrupt status
return kUSB_succeed;
}
