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 -----------------------------*/
xMBMasterPortTimersInit(USHORT usTimeOut50us)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
vMBMasterPortTimersT35Enable()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
vMBMasterPortTimersConvertDelayEnable()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
vMBMasterPortTimersRespondTimeoutEnable()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
vMBMasterPortTimersDisable()92 void vMBMasterPortTimersDisable()
93 {
94 rt_timer_stop(&timer);
95 }
96
prvvTIMERExpiredISR(void)97 void prvvTIMERExpiredISR(void)
98 {
99 (void) pxMBMasterPortCBTimerExpired();
100 }
101
timer_timeout_ind(void * parameter)102 static void timer_timeout_ind(void* parameter)
103 {
104 prvvTIMERExpiredISR();
105 }
106
107 #endif
108