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Nut/OS
4.10.3
API Reference
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Nut/OS
4.10.3
API Reference
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#include <cfg/os.h>#include <cfg/arch/avr.h>#include <cfg/dev.h>#include <string.h>#include <sys/atom.h>#include <sys/heap.h>#include <sys/thread.h>#include <sys/event.h>#include <sys/timer.h>#include <sys/confnet.h>#include <net/ether.h>#include <net/if_var.h>#include <dev/irqreg.h>#include <dev/nicrtl.h>#include "rtlregs.h"#include <sys/osdebug.h>#include <net/netdebug.h>
Go to the source code of this file.
Data Structures | |
| struct | nic_pkt_header |
Defines | |
| #define | NUT_THREAD_NICRXSTACK 640 |
| #define | RTL_EE_MEMBUS |
| #define | RTL_EESK_PIN PINC |
| #define | RTL_EESK_DDR DDRC |
| #define | RTL_EE_MEMBUS |
| #define | RTL_EEDO_PORT PORTC |
| #define | RTL_EEDO_DDR DDRC |
| #define | RTL_EE_MEMBUS |
| #define | RTL_EEMU_PORT PORTC |
| #define | RTL_EEMU_DDR DDRC |
| #define | RTL_SIGNAL sig_INTERRUPT0 |
| Interrupt used. | |
| #define | RTL_RISING_EDGE_MODE() sbi(EICRA, ISC00); sbi(EICRA, ISC01) |
| #define | NIC_PAGE_SIZE 0x100 |
| Size of a single ring buffer page. | |
| #define | NIC_START_PAGE 0x40 |
| First ring buffer page address. | |
| #define | NIC_STOP_PAGE 0x60 |
| Last ring buffer page address plus 1. | |
| #define | NIC_TX_PAGES 6 |
| Number of pages in a single transmit buffer. | |
| #define | NIC_TX_BUFFERS 1 |
| Number of transmit buffers. | |
| #define | NIC_FIRST_TX_PAGE NIC_START_PAGE |
| #define | NIC_FIRST_RX_PAGE (NIC_FIRST_TX_PAGE + NIC_TX_PAGES * NIC_TX_BUFFERS) |
| #define | NIC_CR_PAGE0 (0) |
| #define | NIC_CR_PAGE1 (NIC_CR_PS0) |
| #define | NIC_CR_PAGE2 (NIC_CR_PS1) |
| #define | NIC_CR_PAGE3 (NIC_CR_PS1 | NIC_CR_PS0) |
| #define | NICINB(reg) (*((volatile uint8_t *)RTL_BASE_ADDR + reg)) |
| #define | NICOUTB(reg, val) (*((volatile uint8_t *)RTL_BASE_ADDR + reg) = val) |
Functions | |
| void | NicRx (void *arg) |
| NIC receiver thread. | |
| int | NicOutput (NUTDEVICE *dev, NETBUF *nb) |
| Send Ethernet packet. | |
| int | NicInit (NUTDEVICE *dev) |
| Initialize Ethernet hardware. | |
| #define RTL_SIGNAL sig_INTERRUPT0 |
| #define RTL_RISING_EDGE_MODE | ( | ) | sbi(EICRA, ISC00); sbi(EICRA, ISC01) |
| #define NIC_PAGE_SIZE 0x100 |
| #define NIC_START_PAGE 0x40 |
| #define NIC_STOP_PAGE 0x60 |
| #define NIC_TX_PAGES 6 |
| #define NIC_TX_BUFFERS 1 |
Number of transmit buffers.
The initial value had been 2. The idea was to use two alternating buffers. However, this had never been implemented and we took over Bengt Florin's change, defining 1 transmit buffer only and give more buffer space to the receiver.
The controller memory layout is now
The routines are still not using the buffers in an optimal way, as transmission is limited to 1 packet at a time. In fact several smaller packets would fit into the 1.5 kByte buffer. On the other hand, filling the buffer with more than one transmission packet may result in other bad effects, like pulling the IORDY line more often.
| #define NIC_FIRST_RX_PAGE (NIC_FIRST_TX_PAGE + NIC_TX_PAGES * NIC_TX_BUFFERS) |