//! usb_read_packet.
//!
//! This function moves the data stored in the selected endpoint fifo to
//! the address specified by *rbuf.
//!
//!
//! @param ep_num number of the addressed endpoint
//! @param *rbuf aaddress of the first data to write with the USB data
//! @param data_length number of bytes to read
//!
//! @return address of the next U8 to send.
//!
//! Example:
//! while(!(Usb_rx_complete)); // wait new packet received
//! usb_read_packet(4,&first_data,usb_get_nb_byte); // read packet from ep 4
//! Usb_clear_rx(); // acknowledge the transmit
//!
//! Note:
//! rbuf is incremented of 'data_length'.
//!
U8 usb_read_packet(U8 ep_num, U8* rbuf, U8 data_length)
{
U8 remaining_length;
remaining_length = data_length;
Usb_select_endpoint(ep_num);
while(Is_usb_read_enabled() && (0 != remaining_length))
{
*rbuf = Usb_read_byte();
remaining_length--;
rbuf++;
}
return remaining_length;
}
//! usb_read_packet.
//!
//! This function moves the data stored in the selected endpoint fifo to
//! the address specified by *rbuf.
//!
//! @warning Code:xx bytes (function code length)
//!
//! @param ep_num number of the addressed endpoint
//! @param *rbuf aaddress of the first data to write with the USB data
//! @param data_length number of bytes to read
//!
//! @return address of the next uint8_t to send.
//!
//! Example:
//! while(!(Usb_rx_complete)); // wait new packet received
//! usb_read_packet(4,&first_data,usb_get_nb_byte); // read packet from ep 4
//! Usb_clear_rx(); // acknowledge the transmit
//!
//! Note:
//! rbuf is incremented of 'data_length'.
//!
uint8_t usb_read_packet(uint8_t ep_num, uint8_t* rbuf, uint8_t data_length)
{
uint8_t remaining_length;
remaining_length = data_length;
Usb_select_endpoint(ep_num);
while(Is_usb_read_enabled() && (0 != remaining_length))
{
*rbuf = Usb_read_byte();
remaining_length--;
rbuf++;
}
return remaining_length;
}
uint8_t
cdc_ecm_process(void) {
static uint8_t doInit = 1;
Usb_select_endpoint(RX_EP);
if(!Is_usb_endpoint_enabled()) {
return 0;
}
if (doInit) {
#ifdef USB_ETH_HOOK_INIT
USB_ETH_HOOK_INIT();
#endif
cdc_ecm_notify_network_connection(1);
cdc_ecm_notify_connection_speed_change(250000,250000);
doInit = 0;
if(usb_ecm_packet_filter & PACKET_TYPE_PROMISCUOUS) {
#if RF230BB
rf230_set_promiscuous_mode(true);
#else
radio_set_trx_state(RX_ON);
#endif
}
// Select again, just to make sure.
Usb_select_endpoint(RX_EP);
}
if(!usb_eth_is_active) {
// If we aren't active, just eat the packets.
if(Is_usb_read_enabled()) {
Usb_ack_receive_out();
}
return 0;
}
//Connected!
Led0_on();
if(Is_usb_read_enabled()) {
uint16_t bytecounter;
uint16_t bytes_received = 0;
U8 * buffer = uip_buf;
if(!usb_eth_ready_for_next_packet()) {
// Since we aren't ready for a packet yet,
// just return.
goto bail;
}
#ifdef USB_ETH_HOOK_RX_START
USB_ETH_HOOK_RX_START();
#endif
while((bytecounter=Usb_byte_counter_8())==CDC_ECM_DATA_ENDPOINT_SIZE) {
while((bytes_received<USB_ETH_MTU) && (bytecounter--)) {
*buffer++ = Usb_read_byte();
bytes_received++;
}
bytes_received+=bytecounter+1;
//ACK previous data
Usb_ack_receive_out();
//Wait for new data
if(usb_endpoint_wait_for_read_enabled()!=0) {
USB_ETH_HOOK_RX_ERROR("Timeout: read enabled");
goto bail;
}
}
bytecounter = Usb_byte_counter_8();
while((bytes_received<USB_ETH_MTU) && (bytecounter--)) {
*buffer++ = Usb_read_byte();
bytes_received++;
}
bytes_received+=bytecounter+1;
//Ack final data packet
Usb_ack_receive_out();
//PRINTF_P(PSTR("cdc_ecm: Got packet %d bytes long\n"),bytes_received);
#ifdef USB_ETH_HOOK_RX_END
USB_ETH_HOOK_RX_END();
#endif
//Send data over RF or to local stack
if(bytes_received<=USB_ETH_MTU) {
USB_ETH_HOOK_HANDLE_INBOUND_PACKET(uip_buf,bytes_received);
} else {
USB_ETH_HOOK_RX_ERROR("Oversized packet");
}
}
bail:
return 1;
}
uint8_t usb_eth_packet_is_available() {
Usb_select_endpoint(RX_EP);
return Is_usb_read_enabled();
}
