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-rw-r--r--doc/README.drivers.eth13
1 files changed, 8 insertions, 5 deletions
diff --git a/doc/README.drivers.eth b/doc/README.drivers.eth
index e73e462..d0c3571 100644
--- a/doc/README.drivers.eth
+++ b/doc/README.drivers.eth
@@ -122,10 +122,12 @@ function can be called multiple times in a row.
The recv function should process packets as long as the hardware has them
readily available before returning. i.e. you should drain the hardware fifo.
-The common code sets up packet buffers for you already (NetRxPackets), so there
-is no need to allocate your own. For each packet you receive, you should call
-the NetReceive() function on it with the packet length. So the pseudo code
-here would look something like:
+For each packet you receive, you should call the NetReceive() function on it
+along with the packet length. The common code sets up packet buffers for you
+already in the .bss (NetRxPackets), so there should be no need to allocate your
+own. This doesn't mean you must use the NetRxPackets array however; you're
+free to call the NetReceive() function with any buffer you wish. So the pseudo
+code here would look something like:
int ape_recv(struct eth_device *dev)
{
int length, i = 0;
@@ -145,7 +147,8 @@ int ape_recv(struct eth_device *dev)
}
The halt function should turn off / disable the hardware and place it back in
-its reset state.
+its reset state. It can be called at any time (before any call to the related
+init function), so make sure it can handle this sort of thing.
So the call graph at this stage would look something like:
some net operation (ping / tftp / whatever...)