/*
?*?Copyright???2010-2011?Stéphane?Raimbault?
?*
?*?This?library?is?free?software;?you?can?redistribute?it?and/or
?*?modify?it?under?the?terms?of?the?GNU?Lesser?General?Public
?*?License?as?published?by?the?Free?Software?Foundation;?either
?*?version?2.1?of?the?License?or?（at?your?option）?any?later?version.
?*
?*?This?library?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
?*?Lesser?General?Public?License?for?more?details.
?*
?*?You?should?have?received?a?copy?of?the?GNU?Lesser?General?Public
?*?License?along?with?this?library;?if?not?write?to?the?Free?Software
?*?Foundation?Inc.?51?Franklin?Street?Fifth?Floor?Boston?MA?02110-1301?USA
?*/

#include?
#ifndef?_MSC_VER
#include?
#else
#include?“stdint.h“
#endif
#include?
#include?

/*?Sets?many?bits?from?a?single?byte?value?（all?8?bits?of?the?byte?value?are
???set）?*/
void?modbus_set_bits_from_byte（uint8_t?*dest?int?index?const?uint8_t?value）
{
????int?i;

????for?（i=0;?i<8;?i++）?{
????????dest[index+i]?=?（value?&?（1?<????}
}

/*?Sets?many?bits?from?a?table?of?bytes?（only?the?bits?between?index?and
???index?+?nb_bits?are?set）?*/
void?modbus_set_bits_from_bytes（uint8_t?*dest?int?index?unsigned?int?nb_bits
????????????????????????????????const?uint8_t?*tab_byte）
{
????int?i;
????int?shift?=?0;

????for?（i?=?index;?i?????????dest[i]?=?tab_byte[（i?-?index）?/?8]?&?（1?<????????/*?gcc?doesn‘t?like:?shift?=?（++shift）?%?8;?*/
????????shift++;
????????shift?%=?8;
????}
}

/*?Gets?the?byte?value?from?many?bits.
???To?obtain?a?full?byte?set?nb_bits?to?8.?*/
uint8_t?modbus_get_byte_from_bits（const?uint8_t?*src?int?index
??????????????????????????????????unsigned?int?nb_bits）
{
????int?i;
????uint8_t?value?=?0;

????if?（nb_bits?>?8）?{
????????/*?Assert?is?ignored?if?NDEBUG?is?set?*/
????????assert（nb_bits?????????nb_bits?=?8;
????}

????for?（i=0;?i?????????value?|=?（src[index+i]?<????}

????return?value;
}

/*?Get?a?float?from?4?bytes?in?Modbus?format?*/
float?modbus_get_float（const?uint16_t?*src）
{
????float?f?=?0.0f;
????uint32_t?i;

????i?=?（（（uint32_t）src[1]）?<????memcpy（&f?&i?sizeof（float））;

????return?f;
}

/*?Set?a?float?to?4?bytes?in?Modbus?format?*/
void?modbus_set_float（float?f?uint16_t?*dest）
{
????uint32_t?i?=?0;

????memcpy（&i?&f?sizeof（uint32_t））;
????dest[0]?=?（uint16_t）i;
????dest[1]?=?（uint16_t）（i?>>?16）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????168319??2005-11-29?11:19??Modbus詳解\第一章：控制設備通信慨況.pdf

?????文件?????764121??2005-11-29?11:22??Modbus詳解\第三章：以C++Builder設計?Modbus通信程序.pdf

?????文件?????381293??2005-11-29?11:21??Modbus詳解\第二章：Modbus?通信協議說明.pdf

?????文件?????399974??2005-11-29?11:22??Modbus詳解\第五章：Modbus通信最新發展.pdf

?????文件?????222073??2005-11-29?11:20??Modbus詳解\第六章：使用Modbus注意要項.pdf

?????文件????1195222??2005-11-29?11:37??Modbus詳解\第四章：以PC?based?Controller設計Modbus通信程序.pdf

?????文件???????2181??2012-01-17?05:39??libmodbus-3.0.3源碼庫\acinclude.m4

?????文件??????35712??2012-05-26?07:14??libmodbus-3.0.3源碼庫\aclocal.m4

?????文件????????124??2011-09-10?04:29??libmodbus-3.0.3源碼庫\AUTHORS

?????文件??????44941??2012-05-26?07:14??libmodbus-3.0.3源碼庫\config.guess

?????文件???????4374??2012-05-26?07:14??libmodbus-3.0.3源碼庫\config.h.in

?????文件??????34423??2012-05-26?07:14??libmodbus-3.0.3源碼庫\config.sub

?????文件?????577475??2012-05-26?07:14??libmodbus-3.0.3源碼庫\configure

?????文件???????3903??2012-05-26?07:06??libmodbus-3.0.3源碼庫\configure.ac

?????文件??????35147??2010-10-15?21:37??libmodbus-3.0.3源碼庫\COPYING

?????文件??????26530??2011-09-10?04:29??libmodbus-3.0.3源碼庫\COPYING.LESSER

?????文件??????18615??2012-05-26?07:14??libmodbus-3.0.3源碼庫\depcomp

?????文件???????1232??2011-09-10?04:29??libmodbus-3.0.3源碼庫\doc\asciidoc.conf

?????文件???????9593??2012-05-26?07:19??libmodbus-3.0.3源碼庫\doc\libmodbus.7

?????文件??????19795??2012-05-26?07:19??libmodbus-3.0.3源碼庫\doc\libmodbus.html

?????文件???????7743??2012-05-20?05:54??libmodbus-3.0.3源碼庫\doc\libmodbus.txt

?????文件???????2213??2012-05-20?05:54??libmodbus-3.0.3源碼庫\doc\Makefile.am

?????文件??????18251??2012-05-26?07:14??libmodbus-3.0.3源碼庫\doc\Makefile.in

?????文件???????2158??2012-05-26?07:18??libmodbus-3.0.3源碼庫\doc\modbus_close.3

?????文件??????10842??2012-05-26?07:18??libmodbus-3.0.3源碼庫\doc\modbus_close.html

?????文件????????792??2011-09-10?04:29??libmodbus-3.0.3源碼庫\doc\modbus_close.txt

?????文件???????2349??2012-05-26?07:18??libmodbus-3.0.3源碼庫\doc\modbus_connect.3

?????文件??????10734??2012-05-26?07:18??libmodbus-3.0.3源碼庫\doc\modbus_connect.html

?????文件????????981??2011-09-10?04:29??libmodbus-3.0.3源碼庫\doc\modbus_connect.txt

?????文件???????1956??2012-05-26?07:19??libmodbus-3.0.3源碼庫\doc\modbus_flush.3

............此處省略190個文件信息