2 * Copyright © 2012 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; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 #include <ao_radio_spi.h>
21 #include <ao_radio_cmac.h>
23 static struct ao_radio_spi_reply ao_radio_spi_reply;
25 static struct ao_radio_spi_request ao_radio_spi_request;
27 static uint8_t slave_state;
30 ao_radio_slave_low(void)
36 ao_gpio_set(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 0);
37 for (i = 0; i < 1000; i++)
43 ao_radio_slave_high(void)
47 ao_gpio_set(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 1);
52 ao_radio_slave_spi(void)
54 ao_spi_get_slave(AO_RADIO_SLAVE_BUS);
56 ao_spi_recv(&ao_radio_spi_request,
57 (2 << 13) | sizeof (ao_radio_spi_request),
59 ao_radio_slave_high();
61 switch (ao_radio_spi_request.request) {
62 case AO_RADIO_SPI_RECV:
64 /* XXX monitor CS to interrupt the receive */
66 ao_config.radio_setting = ao_radio_spi_request.setting;
68 ao_radio_spi_reply.status = ao_radio_recv(&ao_radio_spi_reply.payload,
69 ao_radio_spi_request.recv_len,
70 ao_radio_spi_request.timeout);
71 ao_led_off(AO_LED_RX);
72 ao_radio_spi_reply.rssi = 0;
73 ao_spi_send(&ao_radio_spi_reply,
74 AO_RADIO_SPI_REPLY_HEADER_LEN + ao_radio_spi_request.recv_len,
79 case AO_RADIO_SPI_CMAC_RECV:
80 ao_config.radio_setting = ao_radio_spi_request.setting;
82 ao_radio_spi_reply.status = ao_radio_cmac_recv(&ao_radio_spi_reply.payload,
83 ao_radio_spi_request.recv_len,
84 ao_radio_spi_request.timeout);
85 ao_led_off(AO_LED_RX);
86 ao_radio_spi_reply.rssi = ao_radio_cmac_rssi;
87 ao_spi_send(&ao_radio_spi_reply,
88 AO_RADIO_SPI_REPLY_HEADER_LEN + ao_radio_spi_request.recv_len,
93 case AO_RADIO_SPI_SEND:
94 ao_config.radio_setting = ao_radio_spi_request.setting;
96 ao_radio_send(&ao_radio_spi_request.payload,
97 ao_radio_spi_request.len - AO_RADIO_SPI_REQUEST_HEADER_LEN);
98 ao_led_off(AO_LED_TX);
101 case AO_RADIO_SPI_CMAC_SEND:
102 ao_config.radio_setting = ao_radio_spi_request.setting;
103 ao_led_on(AO_LED_TX);
104 ao_radio_cmac_send(&ao_radio_spi_request.payload,
105 ao_radio_spi_request.len - AO_RADIO_SPI_REQUEST_HEADER_LEN);
106 ao_led_off(AO_LED_TX);
109 case AO_RADIO_SPI_CMAC_KEY:
110 memcpy(&ao_config.aes_key, ao_radio_spi_request.payload, AO_AES_LEN);
113 case AO_RADIO_SPI_TEST_ON:
114 ao_config.radio_setting = ao_radio_spi_request.setting;
118 case AO_RADIO_SPI_TEST_OFF:
122 ao_radio_slave_low();
126 static struct ao_task ao_radio_slave_spi_task;
129 ao_radio_slave_init(void)
131 ao_add_task(&ao_radio_slave_spi_task, ao_radio_slave_spi, "radio_spi");
132 ao_enable_output(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 0);