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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Copyright © 2011 Anthony Towns <aj@erisian.com.au>
*
* 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; version 2 of the License.
*
* 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 "ao.h"
#include "cc1111.h"
#define FCTL_BUSY (1 << 7)
#define FCTL_SWBSY (1 << 6)
#define FCTL_CONTRD_ENABLE (1 << 4)
#define FCTL_WRITE (1 << 1)
#define FCTL_ERASE (1 << 0)
#define ENDOFCODE (CODESIZE)
#define NUM_PAGES ((0x8000-ENDOFCODE)/1024)
#define SIZE (1024*NUM_PAGES)
#define LOCN (0x8000 - SIZE)
#if NUM_PAGES < 1
#error "Too few pages"
#endif
#if LOCN % 1024 != 0
#error "Pages aren't aligned properly"
#endif
__xdata __at(LOCN) uint8_t ao_intflash[SIZE];
/* Total bytes of available storage */
__xdata uint32_t ao_storage_total = sizeof(ao_intflash);
/* Block size - device is erased in these units. */
__xdata uint32_t ao_storage_block = 1024;
/* Byte offset of config block. Will be ao_storage_block bytes long */
__xdata uint32_t ao_storage_config = sizeof(ao_intflash);
/* Storage unit size - device reads and writes must be within blocks of this size. */
__xdata uint16_t ao_storage_unit = 1024;
__xdata static uint8_t ao_intflash_dma_done;
static uint8_t ao_intflash_dma;
/*
* The internal flash chip is arranged in 1kB sectors; the
* chip cannot erase in units smaller than that.
*
* Writing happens in units of 2 bytes and
* can only change bits from 1 to 0. So, you can rewrite
* the same contents, or append to an existing page easily enough
*/
/*
* Erase the specified sector
*/
uint8_t
ao_storage_erase(uint32_t pos) __reentrant
{
uint16_t addr;
if (pos >= ao_storage_total || pos + ao_storage_block > ao_storage_total)
return 0;
addr = ((uint16_t)(ao_intflash + pos) >> 1);
while (FCTL & FCTL_BUSY)
;
FWT = 0x1F; // 21000 * f / 16e9 ; f = system freq = 24MHz
FADDRH = addr >> 8;
FADDRL = addr & ~0xFF00;
_asm
.even
orl _FCTL, #FCTL_ERASE; ; FCTL |= FCTL_ERASE
nop; ; Required, see datasheet.
_endasm;
while (FCTL & FCTL_BUSY)
;
return 1;
}
/*
* Write to flash
*/
static void
word_aligned_write(uint32_t pos, __xdata void *d, uint16_t len) __reentrant
{
uint16_t addr;
addr = ((uint16_t)(ao_intflash + pos) >> 1);
ao_dma_set_transfer(ao_intflash_dma, d, &X_FWDATA,
DMA_LEN_HIGH_VLEN_LEN | len,
DMA_CFG0_WORDSIZE_8 | DMA_CFG0_TMODE_SINGLE |
DMA_CFG0_TRIGGER_FLASH,
DMA_CFG1_SRCINC_1 | DMA_CFG1_DESTINC_0 |
DMA_CFG1_IRQMASK | DMA_CFG1_PRIORITY_HIGH);
while (FCTL & FCTL_BUSY)
;
FWT = 0x1F; // 21000 * f / 16e9 ; f = system freq = 24MHz
FADDRH = addr >> 8;
FADDRL = addr & ~0xFF00;
ao_dma_start(ao_intflash_dma);
_asm
.even
orl _FCTL, #FCTL_WRITE; ; FCTL |= FCTL_WRITE
_endasm;
__critical while (!ao_intflash_dma_done)
ao_sleep(&ao_intflash_dma_done);
while (FCTL & (FCTL_BUSY | FCTL_SWBSY))
;
}
uint8_t
ao_storage_device_write(uint32_t pos, __xdata void *v, uint16_t len) __reentrant
{
static __xdata uint8_t b[2];
__xdata uint8_t *d = v;
uint8_t oddlen;
if (pos >= ao_storage_total || pos + len > ao_storage_total)
return 0;
if (len == 0)
return 1;
if (pos & 1) {
b[0] = ~0;
b[1] = d[0];
word_aligned_write(pos-1, b, 2);
pos++;
len--;
d++;
}
oddlen = len & 1;
len &= ~1;
if (len > 0) {
word_aligned_write(pos, d, len);
}
if (oddlen) {
b[0] = d[len];
b[1] = ~0;
word_aligned_write(pos+len, b, 2);
}
return 1;
}
/*
* Read from flash
*/
uint8_t
ao_storage_device_read(uint32_t pos, __xdata void *d, uint16_t len) __reentrant
{
if (pos >= ao_storage_total || pos + len > ao_storage_total)
return 0;
memcpy(d, ao_intflash+pos, len);
return 1;
}
void
ao_storage_flush(void) __reentrant
{
}
void
ao_storage_setup(void)
{
}
void
ao_storage_device_info(void) __reentrant
{
printf ("Using internal flash, starting at 0x%04x\n", LOCN);
}
void
ao_storage_device_init(void)
{
ao_intflash_dma = ao_dma_alloc(&ao_intflash_dma_done);
}
|
