uint16_t network_device_read() {
uint16_t ret = 0;
int i;
packet_t *packet = 0;
//if (xxx) DBG("device read");
vicDisable(INT_CHANNEL_USB);
if (!RING_IS_EMPTY(receive_ring_head, receive_ring_tail, RECEIVE_RING_SIZE)) {
packet = &receive_ring[receive_ring_head];
if (packet->size == 0) packet = 0;
}
vicEnable(INT_CHANNEL_USB);
if (packet) {
/* we got ip packet, copy it and notify uip framework */
//ETH_DEV_DBG_INFO("Got a packet!");
DBG("Got a packet! (%d bytes)",packet->size);
packet = &receive_ring[receive_ring_head];
for (i=0; i<packet->size; i++) {
uip_buf[i] = packet->data[i];
//packet->data[i] = 0;
}
ret = packet->size;
packet->size = 0;
vicDisable(INT_CHANNEL_USB);
RING_INC(receive_ring_head, RECEIVE_RING_SIZE);
vicEnable(INT_CHANNEL_USB);
}
return ret;
}
void network_device_send()
{
int i;
uint16_t len;
if (packet_pending) {
ETH_DEV_DBG_ERROR("network_device_send: already pending packet, discarding request");
return;
}
if (uip_len == 0) {
ETH_DEV_DBG_ERROR("network_device_send: uip_len == 0");
return;
}
len = MIN(sizeof(send_buffer), uip_len);
vicDisable(INT_CHANNEL_USB);
for (i=0; i<len; i++) {
send_buffer[i] = uip_buf[i];
}
bytes_sent=0;
bytes_to_send = len;
packet_pending = 1;
usbEnableNAKInterrupts(INACK_BI);
vicEnable(INT_CHANNEL_USB);
}
int usbnet_pop_completed_recv() {
vicDisable(INT_CHANNEL_USB);
int len = usbring_pop_freed(&recv_ring);
vicEnable(INT_CHANNEL_USB);
return len;
}
int usbnet_recv(uint8_t* buffer, uint16_t length) {
vicDisable(INT_CHANNEL_USB);
int success = usbring_post_buffer(&recv_ring, buffer, length);
vicEnable(INT_CHANNEL_USB);
return success;
}
void network_device_send()
{
int i;
uint16_t len;
DBG("network device send! (%d bytes)",uip_len);
if (uip_len == 0) {
ETH_DEV_DBG_ERROR("network_device_send: uip_len == 0");
return;
}
vicDisable(INT_CHANNEL_USB);
uint8_t packet_pending_copy = packet_pending;
vicEnable(INT_CHANNEL_USB);
if (packet_pending_copy) {
ETH_DEV_DBG_ERROR("network_device_send: already pending packet, discarding request");
return;
}
len = MIN(sizeof(send_buffer), uip_len);
for (i=0; i<len; i++) {
send_buffer[i] = uip_buf[i];
}
vicDisable(INT_CHANNEL_USB);
bytes_sent=0;
bytes_to_send = len;
packet_pending = 1;
eth_nak_interrupts |= INACK_BI;
usbEnableNAKInterrupts(eth_nak_interrupts);
vicEnable(INT_CHANNEL_USB);
//ETH_DEV_DBG_ERROR("network_device_send: NACK Interrupts enable on bulk in");
//DBG("leaving network send");
}
int vcomGetchar(void)
{
uint8_t c;
bool eof;
vicDisable(INT_CHANNEL_USB);
eof = fifoGet(&rxfifo, &c);
vicEnable(INT_CHANNEL_USB);
return eof ? c : -1;
}
int usbnet_send(uint8_t* buffer, uint16_t length) {
vicDisable(INT_CHANNEL_USB);
int success = usbring_post_buffer(&send_ring, buffer, length);
vicEnable(INT_CHANNEL_USB);
if (success) {
eth_nak_interrupts |= INACK_BI;
usbEnableNAKInterrupts(eth_nak_interrupts);
}
return success;
}
void vcomPutchar(int c) {
vicDisable(INT_CHANNEL_USB);
fifoPut(&txfifo, c);
usbEnableNAKInterrupts(INACK_BI);
vicEnable(INT_CHANNEL_USB);
}