IPC@CHIP Documentation - SC12 @CHIP-RTOS V1.10

Implementation of this function is necessary if you decide to use your own buffers for receiving incoming data.
The TCP/IP stack will call this function to inform you that the receive buffer (input parameter dataPtr) is no
longer used by TCP/IP.
This callback should return 0 if ok, else -1 on failure.
Generic example:
int huge myDevFreeRecv(DevUserIfaceHandle ifaceHandle, unsigned char far *dataPtr )
{
// Somehow free your allocated buffer at dataPtr
my_free(dataPtr);
}
Related Topics
Top of list
Index page
return 0;
DevUserIfaceHandle type definition
Device Get PhysicalAddress function
This function applies only to Ethernet controllers.
The 6 byte array referenced by the PhysicalAddress input parameter should be filled with the MAC address of
your connected Ethernet controller.
Generic example:
int huge myDevGetPhysAddr(DevUserIfaceHandle ifaceHandle,
unsigned char far * physicalAddress)
{
// Hardware specific: copy MAC address into physicalAddress
_fmemcpy(physicalAddress, myEthernet_MAC, 6) ;
return 0;
}
Related Topics
Top of list
Index page
DevUserIfaceHandle type definition
Implementation of an interrupt service routine (ISR) and receiver task
The implementation of a device specific ISR is optional. If your hardware device is able to generate interrupts on
device events (e.g. incoming data available), you can implement an ISR like the example below. The CPU time
spent within an ISR must be keep to a minimum, as the length of this interrupts masked period impacts the
interrupt latency of the other critical system ISR's. Consequently, your ISR should only notify events (incoming
data, error,..) at the device and not directly handle device events itself (e.g. retrieve incoming data) immediately
Page 347 / 400