1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Pneumatic pressure controller.
* Valve control.
*
* Copyright (C) 2008-2009 Michael Buesch <mb@bu3sch.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "valves.h"
#include "util.h"
#include "main.h"
#include <avr/io.h>
/*** Valve interface definitions ***///XXX
#define VALVE_DDR DDRD
#define VALVE_PORT PORTD
#define VALVE0_14 6 /* Pin for valve-0 position 14 */
#define VALVE0_12 7 /* Pin for valve-0 position 12 */
#define VALVE1_14 4 /* Pin for valve-1 position 14 */
#define VALVE1_12 5 /* Pin for valve-1 position 12 */
#define MMIO8(mem_addr) _MMIO_BYTE(mem_addr)
void valve0_switch(struct valves *v, uint8_t state)
{
MMIO8(v->port) &= ~(BITMASK8(v->bit_0_12) | BITMASK8(v->bit_0_14));
if (state == VALVE_STATE_12)
MMIO8(v->port) |= BITMASK8(v->bit_0_12);
else if (state == VALVE_STATE_14)
MMIO8(v->port) |= BITMASK8(v->bit_0_14);
}
void valve1_switch(struct valves *v, uint8_t state)
{
MMIO8(v->port) &= ~(BITMASK8(v->bit_1_12) | BITMASK8(v->bit_1_14));
if (state == VALVE_STATE_12)
MMIO8(v->port) |= BITMASK8(v->bit_1_12);
else if (state == VALVE_STATE_14)
MMIO8(v->port) |= BITMASK8(v->bit_1_14);
}
void valves_global_switch(struct valves *v, uint8_t state)
{
if (state != v->current_global_state)
__valves_global_switch(v, state);
}
void __valves_global_switch(struct valves *v, uint8_t state)
{
switch (state) {
case VALVES_IDLE:
valve0_switch(v, VALVE_STATE_12);
valve1_switch(v, VALVE_STATE_12);
break;
case VALVES_FLOW_IN:
valve1_switch(v, VALVE_STATE_12);
valve0_switch(v, VALVE_STATE_14);
break;
case VALVES_FLOW_OUT:
valve0_switch(v, VALVE_STATE_12);
valve1_switch(v, VALVE_STATE_14);
break;
}
v->switch_to_idle_time = get_jiffies() + msec_to_jiffies(VALVE_TOGGLE_MSEC);
v->need_switch_to_idle = 1;
v->current_global_state = state;
}
void valves_work(struct valves *v)
{
if (v->need_switch_to_idle &&
time_after(get_jiffies(), v->switch_to_idle_time)) {
v->need_switch_to_idle = 0;
valve0_switch(v, VALVE_STATE_IDLE);
valve1_switch(v, VALVE_STATE_IDLE);
}
}
static inline void valves_ddr_setup(struct valves *v)
{
MMIO8(v->ddr) |= BITMASK8(v->bit_0_12) | BITMASK8(v->bit_0_14) |
BITMASK8(v->bit_1_12) | BITMASK8(v->bit_1_14);
}
void valves_shutdown(struct valves *v)
{
__valves_global_switch(v, VALVES_FLOW_OUT);
valve_wait_toggle(v);
valve0_switch(v, VALVE_STATE_IDLE);
valve1_switch(v, VALVE_STATE_IDLE);
}
void valves_emergency_state(struct valves *v)
{
valves_ddr_setup(v);
__valves_global_switch(v, VALVES_IDLE);
valve_wait_toggle(v);
valve0_switch(v, VALVE_STATE_IDLE);
valve1_switch(v, VALVE_STATE_IDLE);
}
void valves_init(struct valves *v)
{
v->current_global_state = 0xFF;
valves_ddr_setup(v);
__valves_global_switch(v, VALVES_IDLE);
}
|