25、BDS B1I电文处理定义

本文主要是介绍25、BDS B1I电文处理定义，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

$\qquad$ 下面是HD-GR GNSS导航软件的BDS B1I电文处理相关定义：

// b1i_message.h -- Header file for the b1i_message.c file/* * Copyright (C) 2005 Andrew Greenberg* Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2 (June 1991).* See the "COPYING" file distributed with this software for more information.*//* Namuru GPS receiver project* Original : message.h* Modes    : None* version  : V1.0* date     : 21st/Dec/2006*//* * HD-GR GNSS receiver project* Modes    : Inherited the definitions of message.h in the Namuru GPS receiver *            project V1.0 and made necessary adjustments to adapt to the new *            RTOS and functions.* version  : V1.0* date     : xx/xx/2015*/#ifndef __B1I_MESSAGE_H__
#define __B1I_MESSAGE_H__#include "main_message.h"/******************************************************************************** Definitions******************************************************************************//******************************************************************************** Declarations******************************************************************************/typedef struct{unsigned long word[10];unsigned long SOW;		// Time since beginning of the week in 1 second incrementsunsigned long valid;	// 10 bits of word validity flags; all good = 0x3ff} b1i_subframe_t;typedef struct{unsigned short D;		// BCH(15,11,1) shift registerunsigned short swd;		// BCH(15,11,1) short words} bchdc_t;typedef struct {unsigned short prn;				// satellite prnunsigned short frame_sync;		// frame sync. flagunsigned short set_epoch_flag;	// only set the epoch counter once per sync on a channelunsigned short data_inverted;	// data inverted flagunsigned short bitcount;		// # of bits in the current wordunsigned short wordcount;		// # of words in the subframe so farunsigned long wordbuf0;			// Current word (2+30 format)unsigned long wordbuf1;			// previous word (2+30 format)bchdc_t bch_dc1, bch_dc2;		// BCH(15,11,1) decoder data.unsigned short subframe;		// Current subframe #b1i_subframe_t subframes[5];		// Array of 5 subframes (1 frame)
} b1i_message_t;/******************************************************************************** Prototypes (Globally visible functions)******************************************************************************/void b1i_clear_messages(unsigned short ch) __attribute__ ((section(".isrcode.txt")));
void b1i_sync_frame(unsigned short ch, unsigned short bit) __attribute__ ((section(".isrcode.txt")));
void b1i_process_message(OS_FLAGS channels_with_bits, OS_FLAGS channel_bits) __attribute__ ((section(".isrcode.txt")));/******************************************************************************** Externs******************************************************************************/extern b1i_message_t m_b1i_messages[B1I_MAX_CHANNELS] __attribute__ ((section(".isrdata.rwdata")));#endif // __B1I_MESSAGE_H__