git.gag.com Git - fw/altos/blob - src/drivers/ao_pyro_slave.c

   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  *
   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.
   7  *
   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.
  12  *
  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.
  16  */
  17
  18 #include <ao.h>
  19 #include <ao_product.h>
  20 #include <ao_companion.h>
  21
  22 struct ao_companion_command     ao_companion_command;
  23
  24 static const struct ao_companion_setup  ao_telepyro_setup = {
  25         .board_id               = AO_idProduct_NUMBER,
  26         .board_id_inverse       = ~AO_idProduct_NUMBER,
  27         .update_period          = 50,
  28         .channels               = AO_TELEPYRO_NUM_ADC,
  29 };
  30
  31 void ao_spi_slave(void)
  32 {
  33         if (!ao_spi_slave_recv((uint8_t *) &ao_companion_command,
  34                                sizeof (ao_companion_command)))
  35                 return;
  36
  37         /* Figure out the outbound data */
  38         switch (ao_companion_command.command) {
  39         case AO_COMPANION_SETUP:
  40                 ao_spi_slave_send((uint8_t *) &ao_telepyro_setup,
  41                                   sizeof (ao_telepyro_setup));
  42                 break;
  43         case AO_COMPANION_FETCH:
  44                 ao_spi_slave_send((uint8_t *) &ao_adc_ring[ao_adc_ring_prev(ao_adc_head)].adc,
  45                                   AO_TELEPYRO_NUM_ADC * sizeof (uint16_t));
  46                 break;
  47         case AO_COMPANION_NOTIFY:
  48                 break;
  49         default:
  50                 return;
  51         }
  52 }