Changes between Version 5 and Version 6 of mnc_driver

Timestamp:

Dec 5, 2016, 7:35:31 PM (7 years ago)

Author:

alain

Comment:

--

mnc_driver

@@ -8 +8 @@
 
 This component has a DMA capability, to access the memory mapped RX and TX ethernet packets queues.
-These queues are implemented by a chained buffers structure, called NIC_CHBUF, and implemented by the ''nic_chbuf_t'' structure.
+These queues are implemented as the chained buffers structure ''nic_chbuf_t'', defined  [source:soft/giet_vm/giet_drivers/mnc_driver.h here] .
 
-It can exist only one ethernet network controller in the architecture, but to improve the throughput, it supports up to 4 channels (i.e. 4 TX and 4 RX queues), indexed by a key depending on the source IP address for the RX packets, and depending on the destination IP address for the TX packets. All channels use the same source MAC address.
+It can exist only one Ethernet network controller in the architecture, but to improve the throughput, it supports up to 4 channels (i.e. 4 TX and 4 RX queues), indexed by a key depending on the source IP address for the RX packets, and depending on the destination IP address for the TX packets. All channels use the same source MAC address.
 
-The Ethernet packet length can have any value, between 64 to 1538 bytes.
+The Ethernet packet length can have any value, from 64 to 1538 bytes.
 The data transfer unit between software and the NIC is a 4 Kbytes "container", containing an integer number of variable size packets. The max number of packets in a container is 66 packets.
 The first 34 words of a container are the container header :
@@ -59 +59 @@
  * return a non-zero value if packet can be read / return zero if queue is empty.
                          
- === 4) void  '''_mnc_write'''( unsigned int channel ,  void * buffer , unsigned int length ) ===
+ === 4) void  '''_mnc_write'''( unsigned int channel ,  char * buffer , unsigned int length ) ===
 This function writes an Ethernet packet in the TX queue defined by the channel argument. It should be called after the _mnc_writable() function.
  * '''channel''' : channel index
@@ -65 +65 @@
  * '''length''' : Ethernet packet length (bytes)
 
- === 5) void  '''_mnc_read'''( unsigned int channel , void * buffer ) ===
+ === 5) void  '''_mnc_read'''( unsigned int channel , char * buffer ) ===
 This function read an Ethernet packet from the RX queue defined by the channel argument. It should be called after the _mnc_readable() function.
  * '''channel''' : channel index