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ruanhaishen
Nodemcu Firmware
Commits
d4dcf557
Commit
d4dcf557
authored
Jan 26, 2015
by
HuangRui
Browse files
Formatted ds18b20.lua.
parent
c9bce72c
Changes
1
Hide whitespace changes
Inline
Side-by-side
lua_modules/ds18b20/ds18b20.lua
View file @
d4dcf557
...
...
@@ -35,27 +35,27 @@ setfenv(1,M)
C
=
0
F
=
1
K
=
2
function
setup
(
dq
)
pin
=
dq
if
(
pin
==
nil
)
then
pin
=
defaultPin
end
ow
.
setup
(
pin
)
function
setup
(
dq
)
pin
=
dq
if
(
pin
==
nil
)
then
pin
=
defaultPin
end
ow
.
setup
(
pin
)
end
function
addrs
()
setup
(
pin
)
tbl
=
{}
ow
.
reset_search
(
pin
)
repeat
addr
=
ow
.
search
(
pin
)
if
(
addr
~=
nil
)
then
table.insert
(
tbl
,
addr
)
end
tmr
.
wdclr
()
until
(
addr
==
nil
)
ow
.
reset_search
(
pin
)
return
tbl
setup
(
pin
)
tbl
=
{}
ow
.
reset_search
(
pin
)
repeat
addr
=
ow
.
search
(
pin
)
if
(
addr
~=
nil
)
then
table.insert
(
tbl
,
addr
)
end
tmr
.
wdclr
()
until
(
addr
==
nil
)
ow
.
reset_search
(
pin
)
return
tbl
end
function
readNumber
(
addr
,
unit
)
...
...
@@ -64,71 +64,71 @@ function readNumber(addr, unit)
flag
=
false
if
(
addr
==
nil
)
then
ow
.
reset_search
(
pin
)
count
=
0
count
=
0
repeat
count
=
count
+
1
addr
=
ow
.
search
(
pin
)
tmr
.
wdclr
()
until
((
addr
~=
nil
)
or
(
count
>
100
))
ow
.
reset_search
(
pin
)
end
count
=
count
+
1
addr
=
ow
.
search
(
pin
)
tmr
.
wdclr
()
until
((
addr
~=
nil
)
or
(
count
>
100
))
ow
.
reset_search
(
pin
)
end
if
(
addr
==
nil
)
then
return
result
return
result
end
crc
=
ow
.
crc8
(
string.sub
(
addr
,
1
,
7
))
if
(
crc
==
addr
:
byte
(
8
))
then
if
((
addr
:
byte
(
1
)
==
0x10
)
or
(
addr
:
byte
(
1
)
==
0x28
))
then
-- print("Device is a DS18S20 family device.")
ow
.
reset
(
pin
)
ow
.
select
(
pin
,
addr
)
ow
.
write
(
pin
,
0x44
,
1
)
-- tmr.delay(1000000)
present
=
ow
.
reset
(
pin
)
ow
.
select
(
pin
,
addr
)
ow
.
write
(
pin
,
0xBE
,
1
)
-- print("P="..present)
data
=
nil
data
=
string.char
(
ow
.
read
(
pin
))
for
i
=
1
,
8
do
data
=
data
..
string.char
(
ow
.
read
(
pin
))
-- print("Device is a DS18S20 family device.")
ow
.
reset
(
pin
)
ow
.
select
(
pin
,
addr
)
ow
.
write
(
pin
,
0x44
,
1
)
-- tmr.delay(1000000)
present
=
ow
.
reset
(
pin
)
ow
.
select
(
pin
,
addr
)
ow
.
write
(
pin
,
0xBE
,
1
)
-- print("P="..present)
data
=
nil
data
=
string.char
(
ow
.
read
(
pin
))
for
i
=
1
,
8
do
data
=
data
..
string.char
(
ow
.
read
(
pin
))
end
-- print(data:byte(1,9))
crc
=
ow
.
crc8
(
string.sub
(
data
,
1
,
8
))
-- print("CRC="..crc)
if
(
crc
==
data
:
byte
(
9
))
then
if
(
unit
==
nil
or
unit
==
C
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
elseif
(
unit
==
F
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
1125
+
320000
elseif
(
unit
==
K
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
+
2731500
else
return
nil
end
-- print(data:byte(1,9))
crc
=
ow
.
crc8
(
string.sub
(
data
,
1
,
8
))
-- print("CRC="..crc)
if
(
crc
==
data
:
byte
(
9
))
then
if
(
unit
==
nil
or
unit
==
C
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
elseif
(
unit
==
F
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
1125
+
320000
elseif
(
unit
==
K
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
+
2731500
else
return
nil
end
t1
=
t
/
10000
t2
=
t
%
10000
-- print("Temperature="..t1.."."..t2.." Centigrade")
-- result = t1.."."..t2
return
t1
,
t2
end
tmr
.
wdclr
()
t1
=
t
/
10000
t2
=
t
%
10000
-- print("Temperature="..t1.."."..t2.." Centigrade")
-- result = t1.."."..t2
return
t1
,
t2
end
tmr
.
wdclr
()
else
-- print("Device family is not recognized.")
-- print("Device family is not recognized.")
end
else
-- print("CRC is not valid!")
-- print("CRC is not valid!")
end
return
result
end
function
read
(
addr
,
unit
)
t1
,
t2
=
readNumber
(
addr
,
unit
)
if
((
t1
==
nil
)
or
(
t2
==
nil
))
then
return
nil
else
return
t1
..
"."
..
t2
end
t1
,
t2
=
readNumber
(
addr
,
unit
)
if
((
t1
==
nil
)
or
(
t2
==
nil
))
then
return
nil
else
return
t1
..
"."
..
t2
end
end
-- Return module table
return
M
\ No newline at end of file
return
M
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