lwIP
2.1.0
Lightweight IP stack
|
Functions | |
err_t | slipif_init (struct netif *netif) |
void | slipif_poll (struct netif *netif) |
void | slipif_process_rxqueue (struct netif *netif) |
void | slipif_received_byte (struct netif *netif, u8_t data) |
void | slipif_received_bytes (struct netif *netif, u8_t *data, u8_t len) |
This is an arch independent SLIP netif. The specific serial hooks must be provided by another file. They are sio_open, sio_read/sio_tryread and sio_send
Usage: This netif can be used in three ways:
1) For NO_SYS==0, an RX thread can be used which blocks on sio_read() until data is received.
2) In your main loop, call slipif_poll() to check for new RX bytes, completed packets are fed into netif->input().
3) Call slipif_received_byte[s]() from your serial RX ISR and slipif_process_rxqueue() from your main loop. ISR level decodes packets and puts completed packets on a queue which is fed into the stack from the main loop (needs SYS_LIGHTWEIGHT_PROT for pbuf_alloc to work on ISR level!).
SLIP netif initialization
Call the arch specific sio_open and remember the opened device in the state field of the netif.
netif | the lwip network interface structure for this slipif |
void slipif_poll | ( | struct netif * | netif | ) |
Polls the serial device and feeds the IP layer with incoming packets.
netif | The lwip network interface structure for this slipif |
void slipif_process_rxqueue | ( | struct netif * | netif | ) |
Feeds the IP layer with incoming packets that were receive
netif | The lwip network interface structure for this slipif |
void slipif_received_byte | ( | struct netif * | netif, |
u8_t | data | ||
) |
Process a received byte, completed packets are put on a queue that is fed into IP through slipif_process_rxqueue().
This function can be called from ISR if SYS_LIGHTWEIGHT_PROT is enabled.
netif | The lwip network interface structure for this slipif |
data | received character |
void slipif_received_bytes | ( | struct netif * | netif, |
u8_t * | data, | ||
u8_t | len | ||
) |
Process multiple received byte, completed packets are put on a queue that is fed into IP through slipif_process_rxqueue().
This function can be called from ISR if SYS_LIGHTWEIGHT_PROT is enabled.
netif | The lwip network interface structure for this slipif |
data | received character |
len | Number of received characters |