1 |
2 |
iztok |
/******************************************************************************
|
2 |
|
|
* *
|
3 |
3 |
iztok |
* Minimalistic 1-wire (onewire) master with Avalon MM bus interface *
|
4 |
|
|
* Copyright (C) 2010 Iztok Jeras *
|
5 |
|
|
* Since the code is based on an Altera app note, I kept their license. *
|
6 |
|
|
* *
|
7 |
2 |
iztok |
* License Agreement *
|
8 |
|
|
* *
|
9 |
|
|
* Copyright (c) 2008 Altera Corporation, San Jose, California, USA. *
|
10 |
|
|
* All rights reserved. *
|
11 |
|
|
* *
|
12 |
|
|
* Permission is hereby granted, free of charge, to any person obtaining a *
|
13 |
|
|
* copy of this software and associated documentation files (the "Software"), *
|
14 |
|
|
* to deal in the Software without restriction, including without limitation *
|
15 |
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
|
16 |
|
|
* and/or sell copies of the Software, and to permit persons to whom the *
|
17 |
|
|
* Software is furnished to do so, subject to the following conditions: *
|
18 |
|
|
* *
|
19 |
|
|
* The above copyright notice and this permission notice shall be included in *
|
20 |
|
|
* all copies or substantial portions of the Software. *
|
21 |
|
|
* *
|
22 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
|
23 |
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
|
24 |
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
|
25 |
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
|
26 |
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
|
27 |
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
|
28 |
|
|
* DEALINGS IN THE SOFTWARE. *
|
29 |
|
|
* *
|
30 |
|
|
* This agreement shall be governed in all respects by the laws of the State *
|
31 |
|
|
* of California and by the laws of the United States of America. *
|
32 |
|
|
* *
|
33 |
|
|
******************************************************************************/
|
34 |
|
|
|
35 |
|
|
|
36 |
|
|
#ifndef __SOCKIT_OWM_H__
|
37 |
|
|
#define __SOCKIT_OWM_H__
|
38 |
|
|
|
39 |
|
|
#include <stddef.h>
|
40 |
|
|
|
41 |
|
|
#include "sys/alt_warning.h"
|
42 |
|
|
|
43 |
|
|
#include "os/alt_sem.h"
|
44 |
|
|
#include "os/alt_flag.h"
|
45 |
|
|
#include "alt_types.h"
|
46 |
|
|
|
47 |
|
|
#ifdef __cplusplus
|
48 |
|
|
extern "C"
|
49 |
|
|
{
|
50 |
3 |
iztok |
#endif // __cplusplus
|
51 |
2 |
iztok |
|
52 |
3 |
iztok |
//////////////////////////////////////////////////////////////////////////////
|
53 |
|
|
// global structure containing the current state of the sockit_owm driver
|
54 |
|
|
//////////////////////////////////////////////////////////////////////////////
|
55 |
2 |
iztok |
|
56 |
|
|
typedef struct sockit_owm_state_s
|
57 |
|
|
{
|
58 |
3 |
iztok |
void* base; // The base address of the device
|
59 |
2 |
iztok |
// constants
|
60 |
3 |
iztok |
alt_u32 ovd_e; // Overdrive mode implementation enable
|
61 |
|
|
alt_u32 cdr_e; // Clock divider ratio register implementation enable
|
62 |
2 |
iztok |
alt_u32 own; // Number of onewire ports
|
63 |
3 |
iztok |
char btp_n[3]; // base time period for normal mode
|
64 |
|
|
char btp_o[3]; // base time period for overdrive mode
|
65 |
|
|
// clock divider ratio
|
66 |
|
|
alt_u32 cdr_n; // cdr for normal mode
|
67 |
|
|
alt_u32 cdr_o; // cdr for overdrive mode
|
68 |
|
|
alt_u32 f_dly; // u16.16 1/ms (inverse of delay time)
|
69 |
2 |
iztok |
// status
|
70 |
3 |
iztok |
alt_u32 ien; // interrupt enable status
|
71 |
2 |
iztok |
alt_u32 use; // Aquire status
|
72 |
|
|
alt_u32 ovd; // Overdrive status
|
73 |
|
|
alt_u32 pwr; // Power status
|
74 |
|
|
// OS multitasking features
|
75 |
3 |
iztok |
ALT_FLAG_GRP (irq) // interrupt event flag
|
76 |
|
|
ALT_SEM (cyc) // transfer lock semaphore
|
77 |
2 |
iztok |
} sockit_owm_state;
|
78 |
|
|
|
79 |
3 |
iztok |
//////////////////////////////////////////////////////////////////////////////
|
80 |
|
|
// instantiation macro
|
81 |
|
|
// can be used oly once, since the driver is based on global variables
|
82 |
|
|
//////////////////////////////////////////////////////////////////////////////
|
83 |
2 |
iztok |
|
84 |
|
|
#define SOCKIT_OWM_INSTANCE(name, state) \
|
85 |
3 |
iztok |
sockit_owm_state sockit_owm = { (void*) name##_BASE, \
|
86 |
|
|
name##_OVD_E, \
|
87 |
|
|
name##_CDR_E, \
|
88 |
|
|
name##_OWN, \
|
89 |
|
|
name##_BTP_N, \
|
90 |
|
|
name##_BTP_O, \
|
91 |
|
|
name##_CDR_N, \
|
92 |
|
|
name##_CDR_O, \
|
93 |
|
|
name##_F_DLY, \
|
94 |
|
|
0, 0, 0, 0}; \
|
95 |
2 |
iztok |
void* state = (void*) name##_BASE
|
96 |
|
|
|
97 |
3 |
iztok |
//////////////////////////////////////////////////////////////////////////////
|
98 |
|
|
// initialization function, registers the interrupt handler
|
99 |
|
|
//////////////////////////////////////////////////////////////////////////////
|
100 |
|
|
|
101 |
2 |
iztok |
extern void sockit_owm_init(alt_u32 irq);
|
102 |
|
|
|
103 |
3 |
iztok |
//////////////////////////////////////////////////////////////////////////////
|
104 |
|
|
// initialization macro
|
105 |
|
|
//////////////////////////////////////////////////////////////////////////////
|
106 |
|
|
|
107 |
2 |
iztok |
#ifndef SOCKIT_OWM_POLLING
|
108 |
|
|
#define SOCKIT_OWM_INIT(name, state) \
|
109 |
|
|
if (name##_IRQ == ALT_IRQ_NOT_CONNECTED) \
|
110 |
|
|
{ \
|
111 |
|
|
ALT_LINK_ERROR ("Error: Interrupt not connected for " #name ". " \
|
112 |
|
|
"You have selected the interrupt driven version of " \
|
113 |
3 |
iztok |
"the sockit_owm (SoCkit 1-wire master) driver, but " \
|
114 |
2 |
iztok |
"the interrupt is not connected for this device. You " \
|
115 |
|
|
"can select a polled mode driver by checking the " \
|
116 |
|
|
"'small driver' option in the HAL configuration " \
|
117 |
3 |
iztok |
"window, or by using the -DSOCKIT_OWM_POLLING " \
|
118 |
2 |
iztok |
"preprocessor flag."); \
|
119 |
|
|
} \
|
120 |
|
|
else \
|
121 |
|
|
{ \
|
122 |
|
|
sockit_owm_init(name##_IRQ); \
|
123 |
|
|
}
|
124 |
|
|
#else
|
125 |
|
|
#define SOCKIT_OWM_INIT(name, state)
|
126 |
|
|
#endif
|
127 |
|
|
|
128 |
|
|
#ifdef __cplusplus
|
129 |
|
|
}
|
130 |
3 |
iztok |
#endif // __cplusplus
|
131 |
2 |
iztok |
|
132 |
3 |
iztok |
#endif // __SOCKIT_OWM_H__
|