1 /* 2 * FreeModbus Libary: RT-Thread Port 3 * Copyright (C) 2013 Armink <[email protected]> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 * File: $Id: porttimer_m.c,v 1.60 2013/08/13 15:07:05 Armink add Master Functions$ 20 */ 21 22 /* ----------------------- Platform includes --------------------------------*/ 23 #include "port.h" 24 25 /* ----------------------- Modbus includes ----------------------------------*/ 26 #include "mb.h" 27 #include "mb_m.h" 28 #include "mbport.h" 29 30 #if MB_MASTER_RTU_ENABLED > 0 || MB_MASTER_ASCII_ENABLED > 0 31 /* ----------------------- Variables ----------------------------------------*/ 32 static USHORT usT35TimeOut50us; 33 static struct rt_timer timer; 34 static void prvvTIMERExpiredISR(void); 35 static void timer_timeout_ind(void* parameter); 36 37 /* ----------------------- static functions ---------------------------------*/ 38 static void prvvTIMERExpiredISR(void); 39 40 /* ----------------------- Start implementation -----------------------------*/ 41 BOOL xMBMasterPortTimersInit(USHORT usTimeOut50us) 42 { 43 /* backup T35 ticks */ 44 usT35TimeOut50us = usTimeOut50us; 45 46 rt_timer_init(&timer, "master timer", 47 timer_timeout_ind, /* bind timeout callback function */ 48 RT_NULL, 49 (50 * usT35TimeOut50us) / (1000 * 1000 / RT_TICK_PER_SECOND) + 1, 50 RT_TIMER_FLAG_ONE_SHOT); /* one shot */ 51 52 return TRUE; 53 } 54 55 void vMBMasterPortTimersT35Enable() 56 { 57 rt_tick_t timer_tick = (50 * usT35TimeOut50us) 58 / (1000 * 1000 / RT_TICK_PER_SECOND); 59 60 /* Set current timer mode, don't change it.*/ 61 vMBMasterSetCurTimerMode(MB_TMODE_T35); 62 63 rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick); 64 65 rt_timer_start(&timer); 66 } 67 68 void vMBMasterPortTimersConvertDelayEnable() 69 { 70 rt_tick_t timer_tick = MB_MASTER_DELAY_MS_CONVERT * RT_TICK_PER_SECOND / 1000; 71 72 /* Set current timer mode, don't change it.*/ 73 vMBMasterSetCurTimerMode(MB_TMODE_CONVERT_DELAY); 74 75 rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick); 76 77 rt_timer_start(&timer); 78 } 79 80 void vMBMasterPortTimersRespondTimeoutEnable() 81 { 82 rt_tick_t timer_tick = MB_MASTER_TIMEOUT_MS_RESPOND * RT_TICK_PER_SECOND / 1000; 83 84 /* Set current timer mode, don't change it.*/ 85 vMBMasterSetCurTimerMode(MB_TMODE_RESPOND_TIMEOUT); 86 87 rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick); 88 89 rt_timer_start(&timer); 90 } 91 92 void vMBMasterPortTimersDisable() 93 { 94 rt_timer_stop(&timer); 95 } 96 97 void prvvTIMERExpiredISR(void) 98 { 99 (void) pxMBMasterPortCBTimerExpired(); 100 } 101 102 static void timer_timeout_ind(void* parameter) 103 { 104 prvvTIMERExpiredISR(); 105 } 106 107 #endif 108