diff options
Diffstat (limited to 'src/drivers/ao_radio_slave.c')
| -rw-r--r-- | src/drivers/ao_radio_slave.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/drivers/ao_radio_slave.c b/src/drivers/ao_radio_slave.c new file mode 100644 index 00000000..1d1f16fe --- /dev/null +++ b/src/drivers/ao_radio_slave.c @@ -0,0 +1,131 @@ +/* + * Copyright © 2012 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> +#include <ao_radio_spi.h> +#include <ao_radio_cmac.h> + +static __xdata struct ao_radio_spi_reply ao_radio_spi_reply; + +static __xdata struct ao_radio_spi_request ao_radio_spi_request; + +static __xdata uint8_t slave_state; + +static void +ao_radio_slave_low(void) +{ + uint16_t i; + + if (slave_state != 1) + ao_panic(1); + ao_gpio_set(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 0); + for (i = 0; i < 1000; i++) + ao_arch_nop(); + slave_state = 0; +} + +static void +ao_radio_slave_high(void) +{ + if (slave_state != 0) + ao_panic(2); + ao_gpio_set(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 1); + slave_state = 1; +} + +static void +ao_radio_slave_spi(void) +{ + ao_spi_get_slave(AO_RADIO_SLAVE_BUS); + for (;;) { + ao_spi_recv(&ao_radio_spi_request, + (2 << 13) | sizeof (ao_radio_spi_request), + AO_RADIO_SLAVE_BUS); + ao_radio_slave_high(); + ao_spi_recv_wait(); + switch (ao_radio_spi_request.request) { + case AO_RADIO_SPI_RECV: + + /* XXX monitor CS to interrupt the receive */ + + ao_config.radio_setting = ao_radio_spi_request.setting; + ao_led_on(AO_LED_RX); + ao_radio_spi_reply.status = ao_radio_recv(&ao_radio_spi_reply.payload, + ao_radio_spi_request.recv_len); + ao_led_off(AO_LED_RX); + ao_radio_spi_reply.rssi = 0; + ao_spi_send(&ao_radio_spi_reply, + AO_RADIO_SPI_REPLY_HEADER_LEN + ao_radio_spi_request.recv_len, + AO_RADIO_SLAVE_BUS); + ao_radio_slave_low(); + ao_spi_send_wait(); + continue; + case AO_RADIO_SPI_CMAC_RECV: + ao_config.radio_setting = ao_radio_spi_request.setting; + ao_led_on(AO_LED_RX); + ao_radio_spi_reply.status = ao_radio_cmac_recv(&ao_radio_spi_reply.payload, + ao_radio_spi_request.recv_len, + ao_radio_spi_request.timeout); + ao_led_off(AO_LED_RX); + ao_radio_spi_reply.rssi = ao_radio_cmac_rssi; + ao_spi_send(&ao_radio_spi_reply, + AO_RADIO_SPI_REPLY_HEADER_LEN + ao_radio_spi_request.recv_len, + AO_RADIO_SLAVE_BUS); + ao_radio_slave_low(); + ao_spi_send_wait(); + continue; + case AO_RADIO_SPI_SEND: + ao_config.radio_setting = ao_radio_spi_request.setting; + ao_led_on(AO_LED_TX); + ao_radio_send(&ao_radio_spi_request.payload, + ao_radio_spi_request.len - AO_RADIO_SPI_REQUEST_HEADER_LEN); + ao_led_off(AO_LED_TX); + break; + + case AO_RADIO_SPI_CMAC_SEND: + ao_config.radio_setting = ao_radio_spi_request.setting; + ao_led_on(AO_LED_TX); + ao_radio_cmac_send(&ao_radio_spi_request.payload, + ao_radio_spi_request.len - AO_RADIO_SPI_REQUEST_HEADER_LEN); + ao_led_off(AO_LED_TX); + break; + + case AO_RADIO_SPI_CMAC_KEY: + ao_xmemcpy(&ao_config.aes_key, ao_radio_spi_request.payload, AO_AES_LEN); + break; + + case AO_RADIO_SPI_TEST_ON: + ao_config.radio_setting = ao_radio_spi_request.setting; + ao_radio_test(1); + break; + + case AO_RADIO_SPI_TEST_OFF: + ao_radio_test(0); + break; + } + ao_radio_slave_low(); + } +} + +static __xdata struct ao_task ao_radio_slave_spi_task; + +void +ao_radio_slave_init(void) +{ + ao_add_task(&ao_radio_slave_spi_task, ao_radio_slave_spi, "radio_spi"); + ao_enable_output(AO_RADIO_SLAVE_INT_PORT, AO_RADIO_SLAVE_INT_BIT, AO_RADIO_SLAVE_INT_PIN, 0); +} |