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
|
require 'fcntl'
require 'termios'
include Termios
DEVICE = '/dev/modem'
BAUDRATE = B115200
def dev_open(path)
dev = open(DEVICE, File::RDWR | File::NONBLOCK)
mode = dev.fcntl(Fcntl::F_GETFL, 0)
dev.fcntl(Fcntl::F_SETFL, mode & ~File::NONBLOCK)
dev
end
def dump_termios(tio, banner)
puts banner
puts " ispeed = #{BAUDS[tio.ispeed]}, ospeed = #{BAUDS[tio.ospeed]}"
["iflag", "oflag", "cflag", "lflag"].each do |x|
flag = tio.send(x)
flags = []
eval("#{x.upcase}S").each do |f, sym|
flags << sym.to_s if flag & f != 0
end
puts " #{x} = #{flags.sort.join(' | ')}"
end
print " cc ="
cc = tio.cc
cc.each_with_index do |x, idx|
print " #{CCINDEX[idx]}=#{x}" if CCINDEX.include?(idx)
end
puts
end
dev = dev_open(DEVICE)
oldtio = getattr(dev)
dump_termios(oldtio, "current tio:")
newtio = new_termios()
newtio.iflag = IGNPAR
newtio.oflag = 0
newtio.cflag = (CRTSCTS | CS8 | CREAD)
newtio.lflag = 0
newtio.cc[VTIME] = 0
newtio.cc[VMIN] = 1
newtio.ispeed = BAUDRATE
newtio.ospeed = BAUDRATE
dump_termios(newtio, "new tio:")
flush(dev, TCIOFLUSH)
setattr(dev, TCSANOW, newtio)
dump_termios(getattr(dev), "current tio:")
"AT\x0d".each_byte {|c|
c = c.chr
p [:write_char, c]
dev.putc c
d = dev.getc
p [:echo_back, d && d.chr || nil]
}
r = ''
while /OK\x0d\x0a/o !~ r
r << dev.getc.chr
p [:response, r]
end
setattr(dev, TCSANOW, oldtio)
dump_termios(getattr(dev), "current tio:")
|
