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
|
/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* 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"
volatile __xdata struct ao_adc ao_adc_ring[AO_ADC_RING];
volatile __data uint8_t ao_adc_head;
void
ao_adc_poll(void)
{
ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | 0;
}
void
ao_adc_sleep(void)
{
ao_sleep(&ao_adc_ring);
}
void
ao_adc_get(__xdata struct ao_adc *packet)
{
uint8_t i = ao_adc_ring_prev(ao_adc_head);
memcpy(packet, &ao_adc_ring[i], sizeof (struct ao_adc));
}
void
ao_adc_isr(void) interrupt 1
{
uint8_t sequence;
uint8_t __xdata *a;
sequence = (ADCCON2 & ADCCON2_SCH_MASK) >> ADCCON2_SCH_SHIFT;
a = (uint8_t __xdata *) (&ao_adc_ring[ao_adc_head].accel + sequence);
a[0] = ADCL;
a[1] = ADCH;
if (sequence < 5) {
/* start next channel conversion */
ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | (sequence + 1);
} else {
/* record this conversion series */
ao_adc_ring[ao_adc_head].tick = ao_time();
ao_adc_head = ao_adc_ring_next(ao_adc_head);
ao_wakeup(ao_adc_ring);
}
}
static void
ao_adc_dump(void)
{
__xdata struct ao_adc packet;
ao_adc_get(&packet);
printf("tick: %5u accel: %4d pres: %4d temp: %4d batt: %4d drogue: %4d main: %4d\n",
packet.tick, packet.accel >> 4, packet.pres >> 4, packet.temp >> 4,
packet.sense_d >> 4, packet.sense_m >> 4);
}
__code struct ao_cmds ao_adc_cmds[] = {
{ 'a', ao_adc_dump, "a Display current ADC values" },
{ 0, ao_adc_dump, NULL },
};
void
ao_adc_init(void)
{
ADCCFG = ((1 << 0) | /* acceleration */
(1 << 1) | /* pressure */
(1 << 2) | /* temperature */
(1 << 3) | /* battery voltage */
(1 << 4) | /* drogue sense */
(1 << 5)); /* main sense */
/* enable interrupts */
ADCIF = 0;
IEN0 |= IEN0_ADCIE;
ao_cmd_register(&ao_adc_cmds[0]);
}
|
