2 * Copyright © 2011 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 volatile __xdata struct ao_data ao_data_ring[AO_DATA_RING];
22 volatile __data uint8_t ao_data_head;
25 const uint8_t adc_channels[AO_LOG_TELESCIENCE_NUM_ADC] = {
42 const uint8_t adc_channels[AO_TELEPYRO_NUM_ADC] = {
43 0x00, /* ADC0 v_batt */
44 0x04, /* ADC4 sense_a */
45 0x05, /* ADC5 sense_b */
46 0x06, /* ADC6 sense_c */
47 0x07, /* ADC7 sense_d */
48 0x23, /* ADC11 sense_e */
49 0x22, /* ADC10 sense_f */
50 0x21, /* ADC9 sense_g */
51 0x20, /* ADC8 sense_h */
55 #define NUM_ADC (sizeof (adc_channels) / sizeof (adc_channels[0]))
57 static uint8_t ao_adc_channel;
59 #define ADC_CHANNEL_LOW(c) (((c) & 0x1f) << MUX0)
60 #define ADC_CHANNEL_HIGH(c) ((((c) & 0x20) >> 5) << MUX5)
62 #define ADCSRA_INIT ((1 << ADEN) | /* Enable ADC */ \
63 (0 << ADATE) | /* No auto ADC trigger */ \
64 (1 << ADIF) | /* Clear interrupt */ \
65 (0 << ADIE) | /* Enable interrupt */ \
66 (6 << ADPS0)) /* Prescale clock by 64 */
68 #define ADCSRB_INIT ((0 << ADHSM) | /* No high-speed mode */ \
69 (0 << ACME) | /* Some comparitor thing */ \
70 (0 << ADTS0)) /* Free running mode (don't care) */
75 uint8_t channel = adc_channels[ao_adc_channel];
76 ADMUX = ((0 << REFS1) | /* AVcc reference */
77 (1 << REFS0) | /* AVcc reference */
78 (1 << ADLAR) | /* Left-shift results */
79 (ADC_CHANNEL_LOW(channel))); /* Select channel */
81 ADCSRB = (ADCSRB_INIT |
82 ADC_CHANNEL_HIGH(channel)); /* High channel bit */
84 ADCSRA = (ADCSRA_INIT |
86 (1 << ADIE)); /* Start conversion */
93 /* Must read ADCL first or the value there will be lost */
96 ao_data_ring[ao_data_head].adc.adc[ao_adc_channel] = value;
97 if (++ao_adc_channel < NUM_ADC - HAS_ICP3_COUNT)
101 /* steal last adc channel for pwm input */
102 ao_data_ring[ao_data_head].adc.adc[ao_adc_channel] = ao_icp3_count;
104 ADCSRA = ADCSRA_INIT;
105 ao_data_ring[ao_data_head].tick = ao_time();
106 ao_data_head = ao_data_ring_next(ao_data_head);
107 ao_wakeup((void *) &ao_data_head);
108 ao_cpu_sleep_disable = 0;
115 ao_cpu_sleep_disable = 1;
121 ao_data_get(__xdata struct ao_data *packet)
123 uint8_t i = ao_data_ring_prev(ao_data_head);
124 memcpy(packet, (void *) &ao_data_ring[i], sizeof (struct ao_data));
128 ao_adc_dump(void) __reentrant
130 static __xdata struct ao_data packet;
132 ao_data_get(&packet);
133 printf("tick: %5u", packet.tick);
134 for (i = 0; i < NUM_ADC; i++)
135 printf (" %2d: %5u", i, packet.adc.adc[i]);
139 __code struct ao_cmds ao_adc_cmds[] = {
140 { ao_adc_dump, "a\0ADC" },
147 PRR0 &= ~(1 << PRADC);
150 ADCSRB = ADCSRB_INIT;
151 ADCSRA = ADCSRA_INIT;
152 ao_cmd_register(&ao_adc_cmds[0]);