pccomms.h

00001 /****************************************************************************
00002  *    Copyright 2010 Andy Kirkham, Stellar Technologies Ltd
00003  *    
00004  *    This file is part of the Satellite Observers Workbench (SOWB).
00005  *
00006  *    SOWB is free software: you can redistribute it and/or modify
00007  *    it under the terms of the GNU General Public License as published by
00008  *    the Free Software Foundation, either version 3 of the License, or
00009  *    (at your option) any later version.
00010  *
00011  *    SOWB is distributed in the hope that it will be useful,
00012  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *    GNU General Public License for more details.
00015  *
00016  *    You should have received a copy of the GNU General Public License
00017  *    along with SOWB.  If not, see <http://www.gnu.org/licenses/>.
00018  *
00019  *    $Id: main.cpp 5 2010-07-12 20:51:11Z ajk $
00020  *    
00021  ***************************************************************************/
00022 
00023 #ifndef PCCOMMS_H
00024 #define PCCOMMS_H
00025  
00026 #include "sowb.h"
00027 
00028 #define PCCOMMS_STATE_WAITING           0
00029 #define PCCOMMS_BASE_PACKET_READ        1
00030 #define PCCOMMS_PACKET_READ             2
00031 #define PCCOMMS_BASE_PACKET_BAD_CSUM    3
00032 
00033 #define PCCOMMS_PACKET_ACCEPTED         1
00034 #define PCCOMMS_PACKET_REJECTED         2
00035 
00036 typedef struct _base_packet_bin {
00037     uint16_t    mode;
00038     uint16_t    length;
00039 } BASE_PACKET_B;
00040 
00041 #define BASE_PACKET_B_LEN   sizeof(BASE_PACKET_B)
00042 
00043 typedef struct _base_packet_ascii {
00044     char        lead_char;
00045     char        mode[4];
00046     char        length[4];
00047     char        csum;
00048     char        flag;
00049     char        trail_char;
00050 } BASE_PACKET_A;
00051 
00052 #define BASE_PACKET_A_LEN   sizeof(BASE_PACKET_A)
00053 
00054 #define BASE_PACKET_WRAP    if(header_packet_in>=BASE_PACKET_A_LEN)header_packet_in=0
00055 
00056 void pccomms_init(void);
00057 void pccomms_process(void);
00058 
00059 void Uart3_init(void);
00060 void Uart3_putc(char c);
00061 int Uart3_getc(int block);
00062 
00063 void base_packet_a2b(BASE_PACKET_B *b, BASE_PACKET_A *a);
00064 void base_packet_b2a(BASE_PACKET_A *a, BASE_PACKET_B *b);
00065 
00066 /* Buffer sizes MUST be a aligned 2^, for example 8, 16, 32, 64, 128, 256, 512, 1024, etc 
00067    Do NOT use any other value or the buffer wrapping firmware won't work. */ 
00068 #define UART3_TX_BUFFER_SIZE   512
00069 #define UART3_RX_BUFFER_SIZE   512
00070 
00071 
00072 #endif