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| 2 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | ------------ |
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| 23 | CVS : $Id: scom.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $ |
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| 24 | |||
| 25 | File: $File$ |
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| 26 | Revision: $Revision: 1.1.1.1 $ |
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| 27 | Last update: $Date: 2002-03-29 14:12:51 $ |
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| 28 | ------------ |
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| 29 | |||
| 30 | **/ |
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| 31 | |||
| 32 | /* |
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| 33 | * Copyright (C) 2000 Gerardo Lamastra |
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| 34 | * |
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| 35 | * This program is free software; you can redistribute it and/or modify |
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| 36 | * it under the terms of the GNU General Public License as published by |
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| 37 | * the Free Software Foundation; either version 2 of the License, or |
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| 38 | * (at your option) any later version. |
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| 39 | * |
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| 40 | * This program is distributed in the hope that it will be useful, |
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| 41 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 43 | * GNU General Public License for more details. |
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| 44 | * |
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| 45 | * You should have received a copy of the GNU General Public License |
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| 46 | * along with this program; if not, write to the Free Software |
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| 47 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 48 | * |
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| 49 | */ |
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| 50 | |||
| 51 | /* Project: HARTIK 3.0 */ |
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| 52 | /* Description: Hard Real TIme Kernel for 386 & higher machines */ |
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| 53 | /* Author: Gerardo Lamastra */ |
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| 54 | /* Date: 9/5/96 */ |
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| 55 | |||
| 56 | /* File: SCOM.H */ |
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| 57 | /* Revision: 2.0 */ |
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| 58 | |||
| 59 | #ifndef __SCOM_H__ |
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| 60 | #define __SCOM_H__ |
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| 61 | |||
| 62 | #ifdef __cplusplus |
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| 63 | extern "C" { |
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| 64 | #endif |
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| 65 | |||
| 66 | #include <modules/sem.h> |
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| 67 | |||
| 68 | /* Number of available COM links */ |
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| 69 | #define COM_LINKS 4 |
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| 70 | |||
| 71 | #define COM1 0 |
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| 72 | #define COM2 1 |
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| 73 | #define COM3 2 |
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| 74 | #define COM4 3 |
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| 75 | |||
| 76 | /* These values identify interrupt type */ |
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| 77 | #define RX_FULL 1 |
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| 78 | #define TX_EMPTY 2 |
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| 79 | #define LS_CHANGED 4 |
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| 80 | #define MS_CHANGED 8 |
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| 81 | |||
| 82 | /* This is set when the channel is open */ |
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| 83 | #define LINK_BUSY 128 |
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| 84 | /* This is set if the fast handler is installed */ |
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| 85 | #define FAST_INSTALLED 64 |
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| 86 | |||
| 87 | /* Register displacements */ |
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| 88 | #define THR 0 |
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| 89 | #define RBR 0 |
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| 90 | #define IER 1 |
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| 91 | #define FCR 2 |
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| 92 | #define IIR 2 |
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| 93 | #define LCR 3 |
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| 94 | #define MCR 4 |
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| 95 | #define LSR 5 |
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| 96 | #define MSR 6 |
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| 97 | #define SPad 7 |
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| 98 | |||
| 99 | /* Parity value */ |
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| 100 | #define NONE 0 |
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| 101 | #define ODD 1 |
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| 102 | #define EVEN 3 |
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| 103 | |||
| 104 | /* Used for decoding the IIR status */ |
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| 105 | extern const int IIRbits[]; |
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| 106 | #define DECODE(v) IIRbits[((v >> 1) & 3)] |
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| 107 | #define PENDIRQ(v) !((v) & 1) |
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| 108 | |||
| 109 | /* Bit setting macros */ |
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| 110 | #define bit_on(v,b) v |= (b) |
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| 111 | #define bit_off(v,b) v &= (~(b)) |
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| 112 | |||
| 113 | /* The descriptor of a serial link */ |
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| 114 | /* Each array entry is associated to a COM port */ |
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| 115 | /* The control field is used to specify which kind of interrupts */ |
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| 116 | /* are going to be served; the status field tracks if the entry */ |
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| 117 | /* is curretly used & if the shared fast handler is linked */ |
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| 118 | /* The semaphores are opened if you use an asyncronous server */ |
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| 119 | /* with the link */ |
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| 120 | |||
| 121 | extern struct COM_LINK { |
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| 122 | /* These fields are for general use */ |
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| 123 | BYTE status; |
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| 124 | BYTE control; |
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| 125 | BYTE request; |
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| 126 | BYTE msk; |
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| 127 | PID server; |
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| 128 | sem_t mutex; |
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| 129 | sem_t tx_sem; |
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| 130 | sem_t rx_sem; |
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| 131 | BYTE *tx_buf; |
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| 132 | BYTE *rx_buf; |
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| 133 | unsigned tx_len,rx_len; |
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| 134 | unsigned tx_cnt,rx_cnt; |
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| 135 | } com_link[COM_LINKS]; |
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| 136 | |||
| 137 | /* Available servers */ |
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| 138 | TASK duplexServer(int port); |
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| 139 | TASK rxServer(int port); |
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| 140 | |||
| 141 | int com_open(unsigned int port,DWORD speed,BYTE parity,BYTE len,BYTE stop); |
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| 142 | int com_server(unsigned int port,unsigned int control,PID server); |
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| 143 | int com_close(unsigned int port); |
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| 144 | unsigned com_read(unsigned int port,unsigned int reg); |
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| 145 | unsigned com_receive(unsigned int port); |
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| 146 | void com_write(unsigned int port,unsigned int reg,unsigned int value); |
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| 147 | void com_send(unsigned int port,BYTE b); |
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| 148 | void com_AsyncSend(int port,void *buf,unsigned int len); |
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| 149 | void com_AsyncReceive(int port,void *buf,unsigned int len); |
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| 150 | |||
| 151 | #ifdef __cplusplus |
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| 152 | }; |
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| 153 | #endif |
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| 154 | |||
| 155 | #endif |