Control a robot over the internet using UDP and a Ethernet interface.

Dependencies:   EthernetInterface Motor TextLCD mbed-rtos mbed Socket lwip-eth lwip-sys lwip

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def.c File Reference

def.c File Reference

Common functions used throughout the stack. More...

Go to the source code of this file.

Functions

u16_t lwip_htons (u16_t n)
 These are reference implementations of the byte swapping functions.
u16_t lwip_ntohs (u16_t n)
 Convert an u16_t from network- to host byte order.
u32_t lwip_htonl (u32_t n)
 Convert an u32_t from host- to network byte order.
u32_t lwip_ntohl (u32_t n)
 Convert an u32_t from network- to host byte order.

Detailed Description

Common functions used throughout the stack.

Definition in file def.c.


Function Documentation

u32_t lwip_htonl ( u32_t  n )

Convert an u32_t from host- to network byte order.

Parameters:
nu32_t in host byte order
Returns:
n in network byte order

Definition at line 88 of file def.c.

u16_t lwip_htons ( u16_t  n )

These are reference implementations of the byte swapping functions.

Again with the aim of being simple, correct and fully portable. Byte swapping is the second thing you would want to optimize. You will need to port it to your architecture and in your cc.h:

define LWIP_PLATFORM_BYTESWAP 1 define LWIP_PLATFORM_HTONS(x) <your_htons> define LWIP_PLATFORM_HTONL(x) <your_htonl>

Note ntohs() and ntohl() are merely references to the htonx counterparts. Convert an u16_t from host- to network byte order.

Parameters:
nu16_t in host byte order
Returns:
n in network byte order

Definition at line 64 of file def.c.

u32_t lwip_ntohl ( u32_t  n )

Convert an u32_t from network- to host byte order.

Parameters:
nu32_t in network byte order
Returns:
n in host byte order

Definition at line 103 of file def.c.

u16_t lwip_ntohs ( u16_t  n )

Convert an u16_t from network- to host byte order.

Parameters:
nu16_t in network byte order
Returns:
n in host byte order

Definition at line 76 of file def.c.