int USBGetChar()
{
for(;;)
{
USBSetupInterrupt();
USBGeneralInterrupt();
// Read a char
if (HasData(CDC_RX))
{
u8 c = Recv8();
if (!ReadWriteAllowed())
ReleaseRX();
return c;
}
if (!--_timeout) {
Reboot(); // USB not connected, run firmware
}
_delay_us(100); // stretch out the bootloader period to about 5 seconds after enumeration
LEDPulse();
}
return -1;
}
void Recv(u8 ep, u8* dst, u8 len)
{
SetEP(ep);
while (len--)
{
while (!ReadWriteAllowed())
;
*dst++ = Recv8();
if (!ReadWriteAllowed()) // release empty buffer
ReleaseRX();
}
}
int
USB_Recv(uint8_t ep, void* d, int len)
{
if (!_usbConfiguration || len < 0) return (-1);
LockEP lock(ep);
uint8_t n = FifoByteCount();
len = min(n,len);
n = len;
uint8_t* dst = (uint8_t*)d;
while (n--)
*dst++ = Recv8();
if (len && !FifoByteCount())
ReleaseRX();
return (len);
}
// Non Blocking receive
// Return number of bytes read
int USB_Recv(u8 ep, void* d, int len)
{
if (!_usbConfiguration || len < 0)
return -1;
LockEP lock(ep);
u8 n = FifoByteCount();
len = min(n,len);
n = len;
u8* dst = (u8*)d;
while (n--)
*dst++ = Recv8();
if (len && !FifoByteCount()) // release empty buffer
ReleaseRX();
return len;
}
