/*
* USB Endpoint 3 Event Callback
* Called automatically on USB Endpoint 3 Event
* Parameter: event
*/
void USB_EndPoint3(uint32_t event) {
uint32_t cnt;
switch (event) {
case USB_EVT_OUT:
if (LASERSHARK_USB_DATA_BULK_PACKET_SAMPLE_COUNT+1 > lasershark_get_empty_sample_count()) {
//We can't sit around here all day! Have the main thread loop trigger this when ready.
lasershark_set_bulk_data_interrupt_needs_retrigger();
return;
}
LPC_USB->Ctrl = ((USB_ENDPOINT_OUT(3) & 0x0F) << 2) | CTRL_RD_EN; // enable read
// 3 clock cycles to fetch the packet length from RAM.
asm("nop");
asm("nop");
asm("nop");
asm("nop");
if ((cnt = LPC_USB->RxPLen) & PKT_DV) { // We have data...
cnt &= PKT_LNGTH_MASK; // Get length in bytes
lasershark_process_data(cnt);
LPC_USB->Ctrl = 0;
}
LPC_USB->Ctrl = 0; // Disable read mode.. do this if you ever want to see a USB packet again
WrCmdEP(USB_ENDPOINT_OUT(3), CMD_CLR_BUF);
break;
}
}
/*
* USB Endpoint 3 Event Callback
* Called automatically on USB Endpoint 3 Event
* Parameter: event
*/
void USB_EndPoint3(uint32_t event) {
uint32_t cnt;
switch (event) {
case USB_EVT_OUT:
while (1) {
if (LASERSHARK_USB_DATA_BULK_SIZE <= lasershark_get_empty_sample_count()) {
break;
}
}
LPC_USB->Ctrl = ((USB_ENDPOINT_OUT(3) & 0x0F) << 2) | CTRL_RD_EN; // enable read
// 3 clock cycles to fetch the packet length from RAM.
asm("nop");
asm("nop");
asm("nop");
asm("nop");
if ((cnt = LPC_USB->RxPLen) & PKT_DV) { // We have data...
cnt &= PKT_LNGTH_MASK; // Get length in bytes
lasershark_process_data(cnt);
LPC_USB->Ctrl = 0;
}
LPC_USB->Ctrl = 0; // Disable read mode.. do this if you ever want to see a USB packet again
WrCmdEP(USB_ENDPOINT_OUT(3), CMD_CLR_BUF);
break;
}
}
