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ruanhaishen
Nodemcu Firmware
Commits
5a629e42
Commit
5a629e42
authored
Feb 14, 2015
by
sza2
Browse files
Fix for negative values
parent
7e524f7d
Changes
1
Show whitespace changes
Inline
Side-by-side
lua_modules/ds18b20/ds18b20.lua
View file @
5a629e42
...
@@ -3,6 +3,7 @@
...
@@ -3,6 +3,7 @@
-- NODEMCU TEAM
-- NODEMCU TEAM
-- LICENCE: http://opensource.org/licenses/MIT
-- LICENCE: http://opensource.org/licenses/MIT
-- Vowstar <vowstar@nodemcu.com>
-- Vowstar <vowstar@nodemcu.com>
-- 2015/02/14 sza2 <sza2trash@gmail.com> Fix for negative values
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Set module name as parameter of require
-- Set module name as parameter of require
...
@@ -96,12 +97,16 @@ function readNumber(addr, unit)
...
@@ -96,12 +97,16 @@ function readNumber(addr, unit)
crc
=
ow
.
crc8
(
string.sub
(
data
,
1
,
8
))
crc
=
ow
.
crc8
(
string.sub
(
data
,
1
,
8
))
-- print("CRC="..crc)
-- print("CRC="..crc)
if
(
crc
==
data
:
byte
(
9
))
then
if
(
crc
==
data
:
byte
(
9
))
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
if
(
t
>
32767
)
then
t
=
-
(
65536
-
t
)
end
if
(
unit
==
nil
or
unit
==
C
)
then
if
(
unit
==
nil
or
unit
==
C
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
t
=
t
*
625
elseif
(
unit
==
F
)
then
elseif
(
unit
==
F
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
1125
+
320000
t
=
t
*
1125
+
320000
elseif
(
unit
==
K
)
then
elseif
(
unit
==
K
)
then
t
=
(
data
:
byte
(
1
)
+
data
:
byte
(
2
)
*
256
)
*
625
+
2731500
t
=
t
*
625
+
2731500
else
else
return
nil
return
nil
end
end
...
...
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