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   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
  21 struct ao_companion_command     ao_companion_command;
  22
  23 static const struct ao_companion_setup  ao_telepyro_setup = {
  24         .board_id               = AO_idProduct_NUMBER,
  25         .board_id_inverse       = ~AO_idProduct_NUMBER,
  26         .update_period          = 50,
  27         .channels               = AO_TELEPYRO_NUM_ADC,
  28 };
  29
  30 void ao_spi_slave(void)
  31 {
  32         if (!ao_spi_slave_recv((uint8_t *) &ao_companion_command,
  33                                sizeof (ao_companion_command)))
  34                 return;
  35
  36         /* Figure out the outbound data */
  37         switch (ao_companion_command.command) {
  38         case AO_COMPANION_SETUP:
  39                 ao_spi_slave_send((uint8_t *) &ao_telepyro_setup,
  40                                   sizeof (ao_telepyro_setup));
  41                 break;
  42         case AO_COMPANION_FETCH:
  43                 ao_spi_slave_send((uint8_t *) &ao_adc_ring[ao_adc_ring_prev(ao_adc_head)].adc,
  44                                   AO_TELEPYRO_NUM_ADC * sizeof (uint16_t));
  45                 break;
  46         case AO_COMPANION_NOTIFY:
  47                 break;
  48         default:
  49                 return;
  50         }
  51 }