1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "u2_init.h"
#include "memory_map.h"
#include "spi.h"
#include "hal_io.h"
#include "buffer_pool.h"
#include "pic.h"
#include <stdbool.h>
#include "ethernet.h"
#include "nonstdio.h"
#include "usrp2_eth_packet.h"
#include "memcpy_wa.h"
#include "print_rmon_regs.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
// ----------------------------------------------------------------
static eth_mac_addr_t dst_mac_addr =
{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }};
// ----------------------------------------------------------------
// #define PACKET_SIZE 1500 // bytes
// #define ETH_DATA_RATE 1000000 // 1MB/s
// #define ETH_PACKET_RATE (ETH_DATA_RATE/PACKET_SIZE) // 13,3333 pkts/s
// static int timer_delta = MASTER_CLK_RATE/ETH_PACKET_RATE; // ticks between interrupts
static int timer_delta = (int)(MASTER_CLK_RATE * 1e-3); // tick at 1 kHz
static int sim_timer_delta = (int)(MASTER_CLK_RATE * 100e-6); // tick at 10 kHz
static volatile bool send_packet_now = false; // timer handler sets this
static volatile bool link_is_up = false; // eth handler sets this
int packet_number = 0;
#define CPU_TX_BUF 0 // cpu xmits ethernet frames from here
#define CPU_RX_BUF 1 // receive ethernet frames here
// ----------------------------------------------------------------
/*
* Called when eth phy state changes (w/ interrupts disabled)
*/
void
link_changed_callback(int speed)
{
link_is_up = speed == 0 ? false : true;
hal_set_leds(link_is_up ? 0x2 : 0x0, 0x2);
printf("\neth link changed: speed = %d\n", speed);
}
void
timer_irq_handler(unsigned irq)
{
hal_set_timeout(timer_delta); // schedule next timeout
send_packet_now = 1;
}
static void
init_packet(int *buf, const u2_eth_packet_t *pkt, int bufnum)
{
int i = 0;
int mark = ((bufnum & 0xff) << 24) | 0x005A0000;
for (i = 0; i < BP_NLINES; i++){
buf[i] = mark | i;
mark ^= 0x00FF0000;
}
// copy header into buffer
memcpy_wa(buf, pkt, sizeof(*pkt));
}
static void
init_packets(void)
{
u2_eth_packet_t pkt __attribute__((aligned (4)));
memset(&pkt, 0, sizeof(pkt));
pkt.ehdr.dst = dst_mac_addr;
pkt.ehdr.src = *ethernet_mac_addr();
pkt.ehdr.ethertype = U2_ETHERTYPE;
pkt.fixed.word0 = 0x01234567;
pkt.fixed.timestamp = 0xffffffff;
// init just the one we're using
init_packet((void *)buffer_ram(CPU_TX_BUF), &pkt, CPU_TX_BUF);
}
int
main(void)
{
int npackets_sent = 0;
u2_init();
// setup tx gpio bits for GPIOM_FPGA_1 -- fpga debug output
//hal_gpio_set_sels(GPIO_TX_BANK, "1111111111111111");
//hal_gpio_set_sels(GPIO_RX_BANK, "1111111111111111");
putstr("\ngen_eth_packets\n");
hal_set_leds(0x0, 0x3);
init_packets();
pic_register_handler(IRQ_TIMER, timer_irq_handler);
if (hwconfig_simulation_p())
timer_delta = sim_timer_delta;
hal_set_timeout(timer_delta);
ethernet_register_link_changed_callback(link_changed_callback);
ethernet_init();
/*
if (hwconfig_simulation_p()){
eth_mac->speed = 4; // hardcode mac speed to 1000
link_is_up = true;
}
*/
// fire off a receive from the ethernet
bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
while(1){
uint32_t status = buffer_pool_status->status;
if (status & (BPS_DONE(CPU_RX_BUF) | BPS_ERROR(CPU_RX_BUF))){
bp_clear_buf(CPU_RX_BUF);
// ignore incoming ethernet packets; they were looped back in sim
bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
}
if (status & (BPS_DONE(CPU_TX_BUF) | BPS_ERROR(CPU_TX_BUF))){
if (status & BPS_ERROR(CPU_TX_BUF)){
putchar('E');
}
bp_clear_buf(CPU_TX_BUF);
npackets_sent++;
if ((npackets_sent & 0xF) == 0){ // print after every 16 packets
//print_rmon_regs();
putchar('.');
}
}
if (link_is_up && send_packet_now && (status & BPS_IDLE(CPU_TX_BUF))){
send_packet_now = false;
// kick off the next packet
// FIXME set packet number in packet
bp_send_from_buf(CPU_TX_BUF, PORT_ETH, 1, 0, 255); // 1KB total
hal_toggle_leds(0x1);
}
}
hal_finish();
return 1;
}
|
