gmac_example.c File Reference

GMAC example for SAM.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include <string.h>
#include "mini_ip.h"
#include "conf_eth.h"

Macros
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	at24mac_get_mac_address (void)
static void	configure_console (void)
	Configure UART console. More...
static void	gmac_display_ip_packet (p_ip_header_t p_ip_header, uint32_t ul_size)
	Display the IP packet. More...
void	GMAC_Handler (void)
	GMAC interrupt handler. More...
static uint16_t	gmac_icmp_checksum (uint16_t *p_buff, uint32_t ul_len)
	Process & return the ICMP checksum. More...
static void	gmac_process_arp_packet (uint8_t *p_uc_data, uint32_t ul_size)
	Process the received ARP packet; change address and send it back. More...
static void	gmac_process_eth_packet (uint8_t *p_uc_data, uint32_t ul_size)
	Process the received GMAC packet. More...
static void	gmac_process_ip_packet (uint8_t *p_uc_data, uint32_t ul_size)
	Process the received IP packet; change address and send it back. More...
int	main (void)
	GMAC example entry point. More...

Variables
static gmac_device_t	gs_gmac_dev
	The GMAC driver instance. More...
static volatile uint8_t	gs_uc_eth_buffer [GMAC_FRAME_LENTGH_MAX]
	Buffer for ethernet packets. More...
static uint8_t	gs_uc_ip_address []
	The IP address used for test (ping ...) More...
static uint8_t	gs_uc_mac_address []
	The MAC address used for the test. More...

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- GMAC Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

static void at24mac_get_mac_address ( void  )

static

References twihs_packet::addr, twihs_packet::addr_length, BOARD_AT24MAC_ADDRESS, BOARD_AT24MAC_PAGE_SIZE, BOARD_AT24MAC_TWIHS, BOARD_AT24MAC_TWIHS_CLK, twihs_packet::buffer, twihs_packet::chip, twihs_packet::length, twihs_options::master_clk, pmc_enable_periph_clk(), twihs_options::speed, sysclk_get_cpu_hz(), twihs_master_init(), and twihs_master_read().

Referenced by main().

static void configure_console ( void  )

static

Configure UART console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, CONSOLE_UART_ID, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static void gmac_display_ip_packet ( p_ip_header_t  p_ip_header, uint32_t  ul_size  )

static

Display the IP packet.

Parameters

p_ip_header	Pointer to the IP header.
ul_size	The data size.

References _IPheader::ip_dst, _IPheader::ip_hl_v, _IPheader::ip_id, _IPheader::ip_len, _IPheader::ip_p, IP_PROT_ICMP, IP_PROT_IP, IP_PROT_TCP, IP_PROT_UDP, _IPheader::ip_src, _IPheader::ip_sum, and _IPheader::ip_tos.

Referenced by gmac_process_eth_packet().

void GMAC_Handler

(

void

)

GMAC interrupt handler.

References gmac_handler(), and GMAC_QUE_0.

static uint16_t gmac_icmp_checksum ( uint16_t *  p_buff, uint32_t  ul_len  )

static

Process & return the ICMP checksum.

Parameters

p_buff	Pointer to the buffer.
ul_len	The length of the buffered data.

Returns

Checksum of the ICMP.

References SWAP16.

Referenced by gmac_process_ip_packet().

static void gmac_process_arp_packet ( uint8_t *  p_uc_data, uint32_t  ul_size  )

static

Process the received ARP packet; change address and send it back.

Parameters

p_uc_data	The data to process.
ul_size	The data size.

References arp_header::ar_op, arp_header::ar_sha, arp_header::ar_spa, arp_header::ar_tha, arp_header::ar_tpa, ARP_REPLY, ARP_REQUEST, ethernet_header::et_dest, ethernet_header::et_src, ETH_HEADER_SIZE, gmac_dev_write(), GMAC_OK, GMAC_QUE_0, and SWAP16.

Referenced by gmac_process_eth_packet().

static void gmac_process_eth_packet ( uint8_t *  p_uc_data, uint32_t  ul_size  )

static

Process the received GMAC packet.

Parameters

p_uc_data	The data to process.
ul_size	The data size.

References ethernet_header::et_protlen, ETH_HEADER_SIZE, ETH_PROT_ARP, ETH_PROT_IP, gmac_display_ip_packet(), gmac_process_arp_packet(), gmac_process_ip_packet(), and SWAP16.

Referenced by main().

static void gmac_process_ip_packet ( uint8_t *  p_uc_data, uint32_t  ul_size  )

static

Process the received IP packet; change address and send it back.

Parameters

p_uc_data	The data to process.
ul_size	The data size.

References icmp_echo_header::cksum, icmp_echo_header::code, ethernet_header::et_dest, ethernet_header::et_src, ETH_HEADER_SIZE, ETH_IP_HEADER_SIZE, gmac_dev_write(), gmac_icmp_checksum(), GMAC_OK, GMAC_QUE_0, ICMP_ECHO_REPLY, ICMP_ECHO_REQUEST, _IPheader::ip_dst, _IPheader::ip_len, _IPheader::ip_p, IP_PROT_ICMP, _IPheader::ip_src, SWAP16, icmp_echo_header::type, and UNUSED.

Referenced by gmac_process_eth_packet().

int main

(

void

)

GMAC example entry point.

Returns

Unused (ANSI-C compatibility).

References at24mac_get_mac_address(), BOARD_GMAC_PHY_ADDR, board_init(), configure_console(), ethernet_phy_auto_negotiate(), ethernet_phy_init(), ethernet_phy_set_link(), gmac_dev_init(), gmac_dev_read(), GMAC_OK, gmac_process_eth_packet(), GMAC_QUE_0, gmac_device::p_hw, pmc_enable_periph_clk(), STRING_HEADER, sysclk_get_cpu_hz(), sysclk_init(), gmac_options::uc_copy_all_frame, gmac_options::uc_mac_addr, and gmac_options::uc_no_boardcast.

gmac_device_t gs_gmac_dev

static

The GMAC driver instance.

volatile uint8_t gs_uc_eth_buffer[GMAC_FRAME_LENTGH_MAX]

static

Buffer for ethernet packets.

uint8_t gs_uc_ip_address[]

static

Initial value:

=
        { ETHERNET_CONF_IPADDR0, ETHERNET_CONF_IPADDR1,
            ETHERNET_CONF_IPADDR2, ETHERNET_CONF_IPADDR3 }

The IP address used for test (ping ...)

uint8_t gs_uc_mac_address[]

static

Initial value:

=
        { ETHERNET_CONF_ETHADDR0, ETHERNET_CONF_ETHADDR1, ETHERNET_CONF_ETHADDR2,
            ETHERNET_CONF_ETHADDR3, ETHERNET_CONF_ETHADDR4, ETHERNET_CONF_ETHADDR5
}

The MAC address used for the test.