uint8_t
ecm_send(uint8_t * senddata, uint16_t sendlen, uint8_t led) {
U8 byte_in_packet = 0;
//Send Data
Usb_select_endpoint(TX_EP);
if(usb_endpoint_wait_for_write_enabled()!=0) {
USB_ETH_HOOK_TX_ERROR("Timeout: write enabled");
return 0;
}
#ifdef USB_ETH_HOOK_TX_START
USB_ETH_HOOK_TX_START();
#endif
//Send packet
while(sendlen) {
Usb_write_byte(*senddata);
senddata++;
sendlen--;
byte_in_packet++;
//If endpoint is full, send data in
//And then wait for data to transfer
if (!Is_usb_write_enabled()) {
Usb_ack_in_ready();
if(usb_endpoint_wait_for_write_enabled()!=0) {
USB_ETH_HOOK_TX_ERROR("Timeout: write enabled");
return 0;
}
byte_in_packet=0;
}
}
//Send last data in - also handles sending a ZLP if needed
Usb_ack_in_ready();
#ifdef USB_ETH_HOOK_TX_END
USB_ETH_HOOK_TX_END();
#endif
//Wait for ready
if(usb_endpoint_wait_for_IN_ready()!=0) {
USB_ETH_HOOK_TX_ERROR("Timeout: IN ready");
return 0;
}
return 1;
}
/**
\brief Sends a single ethernet frame over USB using appropriate low-level protocol (EEM or RNDIS)
\param senddata Data to send
\param sendlen Length of data to send
\param led Should the LED be light up for this frame?
*/
uint8_t usb_eth_send(uint8_t * senddata, uint16_t sendlen, uint8_t led)
{
uint8_t ret = 0;
if(!usb_eth_is_active) {
USB_ETH_HOOK_TX_ERROR("Inactive");
goto bail;
}
//Check device is set up
if (Is_device_enumerated() == 0) {
USB_ETH_HOOK_TX_ERROR("Device not enumerated");
goto bail;
}
switch(usb_configuration_nb) {
case USB_CONFIG_RNDIS_DEBUG:
case USB_CONFIG_RNDIS:
ret = rndis_send(senddata, sendlen, led);
break;
case USB_CONFIG_EEM:
ret = eem_send(senddata, sendlen, led);
break;
case USB_CONFIG_ECM:
case USB_CONFIG_ECM_DEBUG:
ret = ecm_send(senddata, sendlen, led);
break;
}
bail:
if(!ret) // Hit the watchdog if we have a successful send.
watchdog_periodic();
return ret;
}
