summaryrefslogtreecommitdiffhomepage
path: root/digital/avr/modules/trace/trace.c
blob: 9de43e352a57889cae3428d3e3b43a1b177f4389 (plain)
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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/* trace.c */
/*  {{{
 *
 * Copyright (C) 2008 NĂ©lio Laranjeiro
 *
 * APBTeam:
 *        Web: http://apbteam.org/
 *      Email: team AT apbteam DOT org
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * }}} */
#include "common.h"
#include "modules/utils/utils.h"
#include "modules/utils/byte.h"
#include "modules/proto/proto.h"
#include "modules/flash/flash.h"
#include "trace.h"

#define TRACE_ARGS_MAX 6
#define TRACE_MAX_ARGS (TRACE_ARGS_MAX * TRACE_ARGS_MAX)

#define TRACE_BLOCK_SIZE_BYTES 65536
#define TRACE_PAGE 0x80000
#define TRACE_PAGE_BLOCKS (TRACE_PAGE / TRACE_BLOCK_SIZE_BYTES)
#define TRACE_PAGE_PAGE_NB (FLASH_SIZE / TRACE_PAGE)

struct trace_t
{
/** Flash status. */
    trace_status_t status;
    /** Flash start address */
    uint32_t addr_start;
    /** Flash address. */
    uint32_t addr;
};
typedef struct trace_t trace_t;

static trace_t trace_global;

void
trace_print_arg_1(uint8_t arg)
{
    trace_print (arg);
}

void
trace_print_arg_2(uint16_t arg)
{
    trace_print (arg >> 8);
    trace_print (arg);
}

void
trace_print_arg_4(uint32_t arg)
{
    trace_print (arg >> 24);
    trace_print (arg >> 16);
    trace_print (arg >> 8);
    trace_print (arg);
}

static inline void
trace_erase_page (uint32_t addr)
{
    uint8_t i;
    while (flash_is_busy ());
    for (i = 0; i < TRACE_PAGE_BLOCKS; i++)
      {
	flash_erase (FLASH_ERASE_64K, addr);
	addr += TRACE_BLOCK_SIZE_BYTES;
      }
}

uint8_t
trace_init (void)
{
    int8_t i;
    uint8_t new_trace_val = 0x0;
    uint32_t new_trace_addr = 0;

    trace_global.status = flash_init ();

    /* Get the first sector to write. */
    if (trace_global.status)
      {
	uint8_t val = 0;
	/* Find the possible traces. */
	for (i = 0; i < TRACE_PAGE_PAGE_NB; i++)
	  {
	    val = flash_read (i * TRACE_PAGE);
	    if (lesseq_mod8(new_trace_val, val))
	      {
		proto_send0 ('e');
		new_trace_val = val;
		new_trace_addr = i * TRACE_PAGE;
	      }
	  }
	new_trace_addr &= FLASH_ADDRESS_HIGH;

	/* Flash not empty */
	if (!((new_trace_val == 0x0) && (new_trace_addr == 0)))
	  {
	    proto_send0 ('h');
	    new_trace_addr = (new_trace_addr + TRACE_PAGE)
		& FLASH_ADDRESS_HIGH;

	    /* Erase it. */
	    trace_erase_page (new_trace_addr);
	  }
	new_trace_val ++;
	proto_send1b ('v', new_trace_val);
	trace_global.addr_start = new_trace_addr;

	/* Store the trace val. */
	flash_write (new_trace_addr, new_trace_val);
	trace_global.addr = new_trace_addr + 1;

	return TRACE_STATUS_ON;
      }
    return TRACE_STATUS_OFF;
}

void
trace_print (uint8_t arg)
{
    /* Store the arg on flash */
    if (trace_global.status)
      {
	flash_write (trace_global.addr, arg);
	trace_global.addr ++;

	if (trace_global.addr == (trace_global.addr_start + TRACE_PAGE))
	    trace_global.status = TRACE_STATUS_OFF;
      }
}

/** Get the current status of the trace module.
  * \return  0x1 if the module is activate, 0x0 if the module is not active.
  */
trace_status_t
trace_status (void)
{
    return trace_global.status;
}

/** Get the current address.
  * \return  addr  the current address managed by the trace module.
  */
uint32_t
trace_addr_current (void)
{
    return trace_global.addr;
}