// Blocking Send of data to an endpoint
int USB_Send(u8 ep, const void* d, int len)
{
if (!_usbConfiguration)
return -1;
int r = len;
const u8* data = (const u8*)d;
u8 zero = ep & TRANSFER_ZERO;
u8 timeout = 250; // 250ms timeout on send? TODO
while (len)
{
u8 n = USB_SendSpace(ep);
if (n == 0)
{
if (!(--timeout))
return -1;
delay(1);
continue;
}
if (n > len)
n = len;
len -= n;
{
LockEP lock(ep);
if (ep & TRANSFER_ZERO)
{
while (n--)
Send8(0);
}
else if (ep & TRANSFER_PGM)
{
while (n--)
Send8(pgm_read_byte(data++));
}
else
{
while (n--)
Send8(*data++);
}
if (!ReadWriteAllowed() || ((len == 0) && (ep & TRANSFER_RELEASE))) // Release full buffer
ReleaseTX();
}
}
TXLED1; // light the TX LED
TxLEDPulse = TX_RX_LED_PULSE_MS;
return r;
}
int
USB_Send(uint8_t ep, const void* d, int len)
{
if (!_usbConfiguration) return (-1);
int res = len;
const uint8_t* data = (const uint8_t*)d;
uint8_t timeout = 250;
while (len) {
uint8_t n = USB_SendSpace(ep);
if (n == 0) {
if (!(--timeout)) return (-1);
delay(1);
continue;
}
if (n > len) n = len;
{
LockEP lock(ep);
if (!ReadWriteAllowed()) continue;
len -= n;
if (ep & TRANSFER_ZERO) {
while (n--) Send8(0);
}
else if (ep & TRANSFER_PGM) {
while (n--) Send8(pgm_read_byte(data++));
}
else {
while (n--) Send8(*data++);
}
if (!ReadWriteAllowed() || ((len == 0) && (ep & TRANSFER_RELEASE)))
ReleaseTX();
}
}
TX_LED_ON;
TxLEDPulse = TX_RX_LED_PULSE_MS;
return (res);
}
int Serial_::availableForWrite(void)
{
return USB_SendSpace(CDC_TX);
}
// Blocking Send of data to an endpoint
int USB_Send(u8 ep, const void* d, int len)
{
if (!_usbConfiguration)
return -1;
if (_usbSuspendState & (1<<SUSPI)) {
//send a remote wakeup
UDCON |= (1 << RMWKUP);
}
int r = len;
const u8* data = (const u8*)d;
u8 timeout = 250; // 250ms timeout on send? TODO
bool sendZlp = false;
while (len || sendZlp)
{
u8 n = USB_SendSpace(ep);
if (n == 0)
{
if (!(--timeout))
return -1;
delay(1);
continue;
}
if (n > len) {
n = len;
}
{
LockEP lock(ep);
// Frame may have been released by the SOF interrupt handler
if (!ReadWriteAllowed())
continue;
len -= n;
if (ep & TRANSFER_ZERO)
{
while (n--)
Send8(0);
}
else if (ep & TRANSFER_PGM)
{
while (n--)
Send8(pgm_read_byte(data++));
}
else
{
while (n--)
Send8(*data++);
}
if (sendZlp) {
ReleaseTX();
sendZlp = false;
} else if (!ReadWriteAllowed()) { // ...release if buffer is full...
ReleaseTX();
if (len == 0) sendZlp = true;
} else if ((len == 0) && (ep & TRANSFER_RELEASE)) { // ...or if forced with TRANSFER_RELEASE
// XXX: TRANSFER_RELEASE is never used can be removed?
ReleaseTX();
}
}
}
TXLED1; // light the TX LED
TxLEDPulse = TX_RX_LED_PULSE_MS;
return r;
}
