forked from jbentham/picowi
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ping.c
142 lines (133 loc) · 5.1 KB
/
ping.c
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
// PicoWi ICMP ping example, see https://iosoft.blog/picowi
//
// Copyright (c) 2022, Jeremy P Bentham
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <stdio.h>
#include "lib/picowi_defs.h"
#include "lib/picowi_pico.h"
#include "lib/picowi_wifi.h"
#include "lib/picowi_init.h"
#include "lib/picowi_ioctl.h"
#include "lib/picowi_event.h"
#include "lib/picowi_join.h"
#include "lib/picowi_ip.h"
// The hard-coded password is for test purposes only!!!
#define SSID "testnet"
#define PASSWD "testpass"
#define EVENT_POLL_USEC 100000
#define PING_RESP_USEC 200000
#define PING_DATA_SIZE 32
// IP address of this unit (must be unique on network)
IPADDR myip = IPADDR_VAL(192, 168, 1, 123);
// IP address of Access Point
IPADDR hostip = IPADDR_VAL(192, 168, 1, 1);
BYTE ping_data[PING_DATA_SIZE];
extern uint32_t ping_tx_time, ping_rx_time;
int main()
{
uint32_t led_ticks, poll_ticks, ping_ticks;
bool ledon=false;
MACADDR mac;
int i, ping_state=0, t;
for (i=0; i<sizeof(ping_data); i++)
ping_data[i] = (BYTE)i;
add_event_handler(icmp_event_handler);
add_event_handler(arp_event_handler);
add_event_handler(join_event_handler);
set_display_mode(DISP_INFO);
io_init();
printf("PicoWi ping client & server\n");
if (!wifi_setup())
printf("Error: SPI communication\n");
else if (!wifi_init())
printf("Error: can't initialise WiFi\n");
else if (!join_start(SSID, PASSWD))
printf("Error: can't start network join\n");
else if (!ip_init(myip))
printf("Error: can't start IP stack\n");
else
{
// Additional diagnostic display
set_display_mode(DISP_INFO|DISP_JOIN|DISP_ARP|DISP_ICMP);
ustimeout(&led_ticks, 0);
ustimeout(&poll_ticks, 0);
while (1)
{
// Toggle LED at 0.5 Hz if joined, 5 Hz if not
if (ustimeout(&led_ticks, link_check() > 0 ? 1000000 : 100000))
{
wifi_set_led(ledon = !ledon);
ustimeout(&ping_ticks, 0);
// If LED is on, and we have joined a network..
if (ledon && link_check()>0)
{
// If not ARPed, send ARP request
if (!ip_find_arp(hostip, mac))
{
ip_tx_arp(mac, hostip, ARPREQ);
ping_state = 1;
}
// If ARPed, send ICMP request
else
{
ip_tx_icmp(mac, hostip, ICREQ, 0, ping_data, sizeof(ping_data));
ping_rx_time = 0;
ping_state = 2;
}
}
}
// If awaiting ARP response..
if (ping_state == 1)
{
// If we have an ARP response, send ICMP request
if (ip_find_arp(hostip, mac))
{
ustimeout(&ping_ticks, 0);
ip_tx_icmp(mac, hostip, ICREQ, 0, ping_data, sizeof(ping_data));
ping_rx_time = 0;
ping_state = 2;
}
}
// Check for timeout on ARP or ICMP request
if ((ping_state==1 || ping_state==2) &&
ustimeout(&ping_ticks, PING_RESP_USEC))
{
printf("%s timeout\n", ping_state==1 ? "ARP" : "ICMP");
ping_state = 0;
}
// If ICMP response received, LED off, print time
else if (ping_state == 2 && ping_rx_time)
{
t = (ping_rx_time - ping_tx_time + 50) / 100;
printf("Round-trip time %d.%d ms\n", t/10, t%10);
wifi_set_led(0);
ping_state = 0;
}
// Get any events, poll the network-join state machine
if (wifi_get_irq() || ustimeout(&poll_ticks, EVENT_POLL_USEC))
{
event_poll();
join_state_poll(SSID, PASSWD);
ustimeout(&poll_ticks, 0);
}
}
}
}
// EOF