path: root/src/drivers/ao_cc115l.c

/*
 * Copyright © 2013 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_cc115l.h>
#include <ao_exti.h>
#include <ao_telemetry.h>
#include <ao_fec.h>

#define AO_RADIO_MAX_SEND	sizeof (struct ao_telemetry_generic)

static uint8_t ao_radio_mutex;

static uint8_t ao_radio_wake;		/* radio ready. Also used as sleep address */
static uint8_t ao_radio_abort;		/* radio operation should abort */
static uint8_t ao_radio_mcu_wake;	/* MARC status change */
static uint8_t ao_radio_marcstate;	/* Last read MARC state value */

#define CC115L_DEBUG	AO_FEC_DEBUG
#define CC115L_TRACE	1

extern const uint32_t	ao_radio_cal;

#define FOSC	26000000

#define ao_radio_select()	ao_spi_get_mask(AO_CC115L_SPI_CS_PORT,(1 << AO_CC115L_SPI_CS_PIN),AO_CC115L_SPI_BUS,AO_SPI_SPEED_4MHz)
#define ao_radio_deselect()	ao_spi_put_mask(AO_CC115L_SPI_CS_PORT,(1 << AO_CC115L_SPI_CS_PIN),AO_CC115L_SPI_BUS)
#define ao_radio_spi_send(d,l)	ao_spi_send((d), (l), AO_CC115L_SPI_BUS)
#define ao_radio_spi_send_fixed(d,l) ao_spi_send_fixed((d), (l), AO_CC115L_SPI_BUS)
#define ao_radio_spi_recv(d,l)	ao_spi_recv((d), (l), AO_CC115L_SPI_BUS)
#define ao_radio_duplex(o,i,l)	ao_spi_duplex((o), (i), (l), AO_CC115L_SPI_BUS)

static uint8_t
ao_radio_reg_read(uint16_t addr)
{
	uint8_t	datao[2], datai[2];
	uint8_t	d;

#if CC115L_TRACE
	printf("\t\tao_radio_reg_read (%04x): ", addr); flush();
#endif
	datao[0] = ((1 << CC115L_READ)  |
		    (0 << CC115L_BURST) |
		    addr);
	ao_radio_select();
	ao_radio_duplex(datao, datai, 2);
	ao_radio_deselect();
#if CC115L_TRACE
	printf (" %02x\n", datai[1]);
#endif
	return datai[1];
}

static void
ao_radio_reg_write(uint16_t addr, uint8_t value)
{
	uint8_t	data[2];
	uint8_t	d;

#if CC115L_TRACE
	printf("\t\tao_radio_reg_write (%04x): %02x\n", addr, value);
#endif
	data[0] = ((0 << CC115L_READ)  |
		   (0 << CC115L_BURST) |
		   addr);
	data[1] = value;
	ao_radio_select();
	ao_radio_spi_send(data, 2);
	ao_radio_deselect();
}

static void
ao_radio_burst_read_start (uint16_t addr)
{
	uint8_t data[1];
	uint8_t d;

	data[0] = ((1 << CC115L_READ)  |
		   (1 << CC115L_BURST) |
		   addr);
	ao_radio_select();
	ao_radio_spi_send(data, 1);
}

static void
ao_radio_burst_read_stop (void)
{
	ao_radio_deselect();
}


static uint8_t
ao_radio_strobe(uint8_t addr)
{
	uint8_t	in;

#if CC115L_TRACE
	printf("\t\tao_radio_strobe (%02x): ", addr); flush();
#endif
	ao_radio_select();
	ao_radio_duplex(&addr, &in, 1);
	ao_radio_deselect();
#if CC115L_TRACE
	printf("%02x\n", in); flush();
#endif
	return in;
}

static uint8_t
ao_radio_fifo_write_start(void)
{
	uint8_t	addr = ((0 << CC115L_READ)  |
			(1 << CC115L_BURST) |
			CC115L_FIFO);
	uint8_t status;

	ao_radio_select();
	ao_radio_duplex(&addr, &status, 1);
	return status;
}

static inline uint8_t ao_radio_fifo_write_stop(uint8_t status) {
	ao_radio_deselect();
	return status;
}

static uint8_t
ao_radio_fifo_write(uint8_t *data, uint8_t len)
{
	uint8_t	status = ao_radio_fifo_write_start();
	ao_radio_spi_send(data, len);
	return ao_radio_fifo_write_stop(status);
}

static uint8_t
ao_radio_fifo_write_fixed(uint8_t data, uint8_t len)
{
	uint8_t status = ao_radio_fifo_write_start();
	ao_radio_spi_send_fixed(data, len);
	return ao_radio_fifo_write_stop(status);
}

static uint8_t
ao_radio_tx_fifo_space(void)
{
	return CC115L_FIFO_SIZE - (ao_radio_reg_read(CC115L_TXBYTES) & CC115L_TXBYTES_NUM_TX_BYTES_MASK);
}

static uint8_t
ao_radio_status(void)
{
	return ao_radio_strobe (CC115L_SNOP);
}

#define ao_radio_rdf_value 0x55

static uint8_t
ao_radio_get_marcstate(void)
{
	return ao_radio_reg_read(CC115L_MARCSTATE) & CC115L_MARCSTATE_MASK;
}

static void
ao_radio_mcu_wakeup_isr(void)
{
	ao_radio_mcu_wake = 1;
	ao_wakeup(&ao_radio_wake);
}


static void
ao_radio_check_marcstate(void)
{
	ao_radio_mcu_wake = 0;
	ao_radio_marcstate = ao_radio_get_marcstate();
	
	/* Anyt other than 'tx finished' means an error occurred */
	if (ao_radio_marcstate != CC115L_MARCSTATE_TX_END)
		ao_radio_abort = 1;
}

static void
ao_radio_isr(void)
{
	ao_exti_disable(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN);
	ao_radio_wake = 1;
	ao_wakeup(&ao_radio_wake);
}

static void
ao_radio_start_tx(void)
{
	ao_exti_set_callback(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN, ao_radio_isr);
	ao_exti_enable(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN);
	ao_exti_enable(AO_CC115L_MCU_WAKEUP_PORT, AO_CC115L_MCU_WAKEUP_PIN);
	ao_radio_strobe(CC115L_STX);
}

static void
ao_radio_idle(void)
{
	for (;;) {
		uint8_t	state = ao_radio_strobe(CC115L_SIDLE);
		if ((state >> CC115L_STATUS_STATE) == CC115L_STATUS_STATE_IDLE)
			break;
	}
	/* Flush any pending TX bytes */
	ao_radio_strobe(CC115L_SFTX);
}

/*
 * Packet deviation is 20.5kHz
 *
 *	fdev = fosc >> 17 * (8 + dev_m) << dev_e
 *
 *     	26e6 / (2 ** 17) * (8 + 5) * (2 ** 3) = 20630Hz
 */

#define PACKET_DEV_E	3
#define PACKET_DEV_M	5

/*
 * For our packet data, set the symbol rate to 38400 Baud
 *
 *              (256 + DATARATE_M) * 2 ** DATARATE_E
 *	Rdata = -------------------------------------- * fosc
 *		             2 ** 28
 *
 *		(256 + 131) * (2 ** 10) / (2**28) * 26e6 = 38383
 *
 *	DATARATE_M = 131
 *	DATARATE_E = 10
 */
#define PACKET_DRATE_E	10
#define PACKET_DRATE_M	131

static const uint16_t packet_setup[] = {
	CC115L_DEVIATN,		((PACKET_DEV_E << CC115L_DEVIATN_DEVIATION_E) |
				 (PACKET_DEV_M << CC115L_DEVIATN_DEVIATION_M)),
	CC115L_MDMCFG4,		((0xf << 4) |
				 (PACKET_DRATE_E << CC115L_MDMCFG4_DRATE_E)),
	CC115L_MDMCFG3,		(PACKET_DRATE_M),
};


/*
 * RDF deviation is 5kHz
 *
 *	fdev = fosc >> 17 * (8 + dev_m) << dev_e
 *
 *     	26e6 / (2 ** 17) * (8 + 4) * (2 ** 1) = 4761Hz
 */

#define RDF_DEV_E	1
#define RDF_DEV_M	4

/*
 * For our RDF beacon, set the symbol rate to 2kBaud (for a 1kHz tone)
 *
 *              (256 + DATARATE_M) * 2 ** DATARATE_E
 *	Rdata = -------------------------------------- * fosc
 *		             2 ** 28
 *
 *		(256 + 67) * (2 ** 6) / (2**28) * 26e6 = 2002
 *
 *	DATARATE_M = 67
 *	DATARATE_E = 6
 *
 * To make the tone last for 200ms, we need 2000 * .2 = 400 bits or 50 bytes
 */
#define RDF_DRATE_E	6
#define RDF_DRATE_M	67
#define RDF_PACKET_LEN	50

static const uint16_t rdf_setup[] = {
	CC115L_DEVIATN,		((RDF_DEV_E << CC115L_DEVIATN_DEVIATION_E) |
				 (RDF_DEV_M << CC115L_DEVIATN_DEVIATION_M)),
	CC115L_MDMCFG4,		((0xf << 4) |
				 (RDF_DRATE_E << CC115L_MDMCFG4_DRATE_E)),
	CC115L_MDMCFG3,		(RDF_DRATE_M),
};

/*
 * APRS deviation is the same as RDF
 */

#define APRS_DEV_E	RDF_DEV_E
#define APRS_DEV_M	RDF_DEV_E

/*
 * For our APRS beacon, set the symbol rate to 9.6kBaud (8x oversampling for 1200 baud data rate)
 *
 *              (256 + DATARATE_M) * 2 ** DATARATE_E
 *	Rdata = -------------------------------------- * fosc
 *		             2 ** 28
 *
 *		(256 + 131) * (2 ** 8) / (2**28) * 26e6 = 9596
 *
 *	DATARATE_M = 131
 *	DATARATE_E = 8
 *
 */
#define APRS_DRATE_E	8
#define APRS_DRATE_M	131

static const uint16_t aprs_setup[] = {
	CC115L_DEVIATN,		((APRS_DEV_E << CC115L_DEVIATN_DEVIATION_E) |
				 (APRS_DEV_M << CC115L_DEVIATN_DEVIATION_M)),
	CC115L_MDMCFG4,		((0xf << 4) |
				 (APRS_DRATE_E << CC115L_MDMCFG4_DRATE_E)),
	CC115L_MDMCFG3,		(APRS_DRATE_M),
};

#define AO_PKTCTRL0_INFINITE	((CC115L_PKTCTRL0_PKT_FORMAT_NORMAL << CC115L_PKTCTRL0_PKT_FORMAT) | \
				 (0 << CC115L_PKTCTRL0_PKT_CRC_EN) |					\
				 (CC115L_PKTCTRL0_PKT_LENGTH_CONFIG_INFINITE << CC115L_PKTCTRL0_PKT_LENGTH_CONFIG))
#define AO_PKTCTRL0_FIXED	((CC115L_PKTCTRL0_PKT_FORMAT_NORMAL << CC115L_PKTCTRL0_PKT_FORMAT) | \
				 (0 << CC115L_PKTCTRL0_PKT_CRC_EN) |					\
				 (CC115L_PKTCTRL0_PKT_LENGTH_CONFIG_FIXED << CC115L_PKTCTRL0_PKT_LENGTH_CONFIG))

static uint16_t ao_radio_mode;

#define AO_RADIO_MODE_BITS_PACKET_TX	1
#define AO_RADIO_MODE_BITS_TX_BUF	2
#define AO_RADIO_MODE_BITS_TX_FINISH	4
#define AO_RADIO_MODE_BITS_RDF		8
#define AO_RADIO_MODE_BITS_APRS		16
#define AO_RADIO_MODE_BITS_INFINITE	32
#define AO_RADIO_MODE_BITS_FIXED	64

#define AO_RADIO_MODE_NONE		0
#define AO_RADIO_MODE_PACKET_TX_BUF	(AO_RADIO_MODE_BITS_PACKET_TX | AO_RADIO_MODE_BITS_TX_BUF)
#define AO_RADIO_MODE_PACKET_TX_FINISH	(AO_RADIO_MODE_BITS_PACKET_TX | AO_RADIO_MODE_BITS_TX_FINISH)
#define AO_RADIO_MODE_RDF		(AO_RADIO_MODE_BITS_RDF | AO_RADIO_MODE_BITS_TX_FINISH)
#define AO_RADIO_MODE_APRS_BUF		(AO_RADIO_MODE_BITS_APRS | AO_RADIO_MODE_BITS_INFINITE | AO_RADIO_MODE_BITS_TX_BUF)
#define AO_RADIO_MODE_APRS_LAST_BUF	(AO_RADIO_MODE_BITS_APRS | AO_RADIO_MODE_BITS_FIXED | AO_RADIO_MODE_BITS_TX_BUF)
#define AO_RADIO_MODE_APRS_FINISH	(AO_RADIO_MODE_BITS_APRS | AO_RADIO_MODE_BITS_FIXED | AO_RADIO_MODE_BITS_TX_FINISH)

static void
ao_radio_set_mode(uint16_t new_mode)
{
	uint16_t changes;
	int i;

	if (new_mode == ao_radio_mode)
		return;

	changes = new_mode & (~ao_radio_mode);
	if (changes & AO_RADIO_MODE_BITS_PACKET_TX)
		for (i = 0; i < sizeof (packet_setup) / sizeof (packet_setup[0]); i += 2)
			ao_radio_reg_write(packet_setup[i], packet_setup[i+1]);

	if (changes & AO_RADIO_MODE_BITS_TX_BUF)
		ao_radio_reg_write(AO_CC115L_INT_GPIO_IOCFG, CC115L_IOCFG_GPIO_CFG_TXFIFO_THR);

	if (changes & AO_RADIO_MODE_BITS_TX_FINISH)
		ao_radio_reg_write(AO_CC115L_INT_GPIO_IOCFG, CC115L_IOCFG_GPIO_CFG_PKT_SYNC_TX | (1 << CC115L_IOCFG_GPIO_INV));

	if (changes & AO_RADIO_MODE_BITS_RDF)
		for (i = 0; i < sizeof (rdf_setup) / sizeof (rdf_setup[0]); i += 2)
			ao_radio_reg_write(rdf_setup[i], rdf_setup[i+1]);

	if (changes & AO_RADIO_MODE_BITS_APRS)
		for (i = 0; i < sizeof (aprs_setup) / sizeof (aprs_setup[0]); i += 2)
			ao_radio_reg_write(aprs_setup[i], aprs_setup[i+1]);

	if (changes & AO_RADIO_MODE_BITS_INFINITE)
		ao_radio_reg_write(CC115L_PKTCTRL0, AO_PKTCTRL0_INFINITE);

	if (changes & AO_RADIO_MODE_BITS_FIXED)
		ao_radio_reg_write(CC115L_PKTCTRL0, AO_PKTCTRL0_FIXED);

	ao_radio_mode = new_mode;
}

static const uint16_t radio_setup[] = {
#include "ao_rf_cc115l.h"
};

static uint8_t	ao_radio_configured = 0;

static void
ao_radio_setup(void)
{
	int	i;

	ao_radio_strobe(CC115L_SRES);

	for (i = 0; i < sizeof (radio_setup) / sizeof (radio_setup[0]); i += 2)
		ao_radio_reg_write(radio_setup[i], radio_setup[i+1]);

	ao_radio_mode = 0;

	ao_config_get();

	ao_radio_configured = 1;
}

static void
ao_radio_set_len(uint8_t len)
{
	static uint8_t	last_len;

	if (len != last_len) {
		ao_radio_reg_write(CC115L_PKTLEN, len);
		last_len = len;
	}
}

static void
ao_radio_get(uint8_t len)
{
	static uint32_t	last_radio_setting;

	ao_mutex_get(&ao_radio_mutex);
	if (!ao_radio_configured)
		ao_radio_setup();
	if (ao_config.radio_setting != last_radio_setting) {
		ao_radio_reg_write(CC115L_FREQ2, ao_config.radio_setting >> 16);
		ao_radio_reg_write(CC115L_FREQ1, ao_config.radio_setting >> 8);
		ao_radio_reg_write(CC115L_FREQ0, ao_config.radio_setting);
		last_radio_setting = ao_config.radio_setting;
	}
	ao_radio_set_len(len);
}

#define ao_radio_put()	ao_mutex_put(&ao_radio_mutex)

static void
ao_rdf_start(uint8_t len)
{
	ao_radio_abort = 0;
	ao_radio_get(len);

	ao_radio_set_mode(AO_RADIO_MODE_RDF);
	ao_radio_wake = 0;

}

static void
ao_rdf_run(void)
{
	ao_radio_start_tx();

	ao_arch_block_interrupts();
	while (!ao_radio_wake && !ao_radio_abort && !ao_radio_mcu_wake)
		ao_sleep(&ao_radio_wake);
	ao_arch_release_interrupts();
	if (ao_radio_mcu_wake)
		ao_radio_check_marcstate();
	if (!ao_radio_wake)
		ao_radio_idle();
	ao_radio_put();
}

void
ao_radio_rdf(void)
{
	ao_rdf_start(AO_RADIO_RDF_LEN);

	ao_radio_fifo_write_fixed(ao_radio_rdf_value, AO_RADIO_RDF_LEN);

	ao_rdf_run();
}

void
ao_radio_continuity(uint8_t c)
{
	uint8_t	i;
	uint8_t status;

	ao_rdf_start(AO_RADIO_CONT_TOTAL_LEN);

	status = ao_radio_fifo_write_start();
	for (i = 0; i < 3; i++) {
		ao_radio_spi_send_fixed(0x00, AO_RADIO_CONT_PAUSE_LEN);
		if (i < c)
			ao_radio_spi_send_fixed(ao_radio_rdf_value, AO_RADIO_CONT_TONE_LEN);
		else
			ao_radio_spi_send_fixed(0x00, AO_RADIO_CONT_TONE_LEN);
	}
	ao_radio_spi_send_fixed(0x00, AO_RADIO_CONT_PAUSE_LEN);
	status = ao_radio_fifo_write_stop(status);
	(void) status;
	ao_rdf_run();
}

void
ao_radio_rdf_abort(void)
{
	ao_radio_abort = 1;
	ao_wakeup(&ao_radio_wake);
}

static void
ao_radio_test_cmd(void)
{
	uint8_t	mode = 2;
	static uint8_t radio_on;
	ao_cmd_white();
	if (ao_cmd_lex_c != '\n') {
		ao_cmd_decimal();
		mode = (uint8_t) ao_cmd_lex_u32;
	}
	mode++;
	if ((mode & 2) && !radio_on) {
#if HAS_MONITOR
		ao_monitor_disable();
#endif
#if PACKET_HAS_SLAVE
		ao_packet_slave_stop();
#endif
		ao_radio_get(0xff);
		ao_radio_strobe(CC115L_STX);
#if CC115L_TRACE
		{ int t; 
			for (t = 0; t < 10; t++) {
				printf ("status: %02x\n", ao_radio_status());
				ao_delay(AO_MS_TO_TICKS(100));
			}
		}
#endif
		radio_on = 1;
	}
	if (mode == 3) {
		printf ("Hit a character to stop..."); flush();
		getchar();
		putchar('\n');
	}
	if ((mode & 1) && radio_on) {
		ao_radio_idle();
		ao_radio_put();
		radio_on = 0;
#if HAS_MONITOR
		ao_monitor_enable();
#endif
	}
}

static void
ao_radio_wait_isr(void)
{
	ao_arch_block_interrupts();
	while (!ao_radio_wake && !ao_radio_mcu_wake && !ao_radio_abort)
		ao_sleep(&ao_radio_wake);
	ao_arch_release_interrupts();
	if (ao_radio_mcu_wake)
		ao_radio_check_marcstate();
}

static uint8_t
ao_radio_wait_tx(uint8_t wait_fifo)
{
	uint8_t	fifo_space = 0;

	do {
		ao_radio_wait_isr();
		if (!wait_fifo)
			return 0;
		fifo_space = ao_radio_tx_fifo_space();
	} while (!fifo_space && !ao_radio_abort);
	return fifo_space;
}

static uint8_t	tx_data[(AO_RADIO_MAX_SEND + 4) * 2];

void
ao_radio_send(const void *d, uint8_t size)
{
	uint8_t		marc_status;
	uint8_t		*e = tx_data;
	uint8_t		encode_len;
	uint8_t		this_len;
	uint8_t		started = 0;
	uint8_t		fifo_space;

	encode_len = ao_fec_encode(d, size, tx_data);

	ao_radio_get(encode_len);

	started = 0;
	fifo_space = CC115L_FIFO_SIZE;
	while (encode_len) {
		this_len = encode_len;

		ao_radio_wake = 0;
		if (this_len > fifo_space) {
			this_len = fifo_space;
			ao_radio_set_mode(AO_RADIO_MODE_PACKET_TX_BUF);
		} else {
			ao_radio_set_mode(AO_RADIO_MODE_PACKET_TX_FINISH);
		}

		ao_radio_fifo_write(e, this_len);
		e += this_len;
		encode_len -= this_len;

		if (!started) {
			ao_radio_start_tx();
			started = 1;
		} else {
			ao_exti_enable(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN);
		}
			
		fifo_space = ao_radio_wait_tx(encode_len != 0);
		if (ao_radio_abort) {
			ao_radio_idle();
			break;
		}
	}
	ao_radio_put();
}

#define AO_RADIO_LOTS	64

void
ao_radio_send_lots(ao_radio_fill_func fill)
{
	uint8_t	buf[AO_RADIO_LOTS], *b;
	int	cnt;
	int	total = 0;
	uint8_t	done = 0;
	uint8_t	started = 0;
	uint8_t	fifo_space;

	ao_radio_get(0xff);
	fifo_space = CC115L_FIFO_SIZE;
	while (!done) {
		cnt = (*fill)(buf, sizeof(buf));
		if (cnt < 0) {
			done = 1;
			cnt = -cnt;
		}
		total += cnt;

		/* At the last buffer, set the total length */
		if (done)
			ao_radio_set_len(total & 0xff);

		b = buf;
		while (cnt) {
			uint8_t	this_len = cnt;

			/* Wait for some space in the fifo */
			while (!ao_radio_abort && (fifo_space = ao_radio_tx_fifo_space()) == 0) {
				ao_radio_wake = 0;
				ao_radio_wait_isr();
			}
			if (ao_radio_abort)
				break;
			if (this_len > fifo_space)
				this_len = fifo_space;

			cnt -= this_len;

			if (done) {
				if (cnt)
					ao_radio_set_mode(AO_RADIO_MODE_APRS_LAST_BUF);
				else
					ao_radio_set_mode(AO_RADIO_MODE_APRS_FINISH);
			} else
				ao_radio_set_mode(AO_RADIO_MODE_APRS_BUF);

			ao_radio_fifo_write(b, this_len);
			b += this_len;

			if (!started) {
				ao_radio_start_tx();
				started = 1;
			} else
				ao_exti_enable(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN);
		}
		if (ao_radio_abort) {
			ao_radio_idle();
			break;
		}
		/* Wait for the transmitter to go idle */
		ao_radio_wake = 0;
		ao_radio_wait_isr();
	}
	ao_radio_put();
}

static char *cc115l_state_name[] = {
	[CC115L_STATUS_STATE_IDLE] = "IDLE",
	[CC115L_STATUS_STATE_TX] = "TX",
	[CC115L_STATUS_STATE_FSTXON] = "FSTXON",
	[CC115L_STATUS_STATE_CALIBRATE] = "CALIBRATE",
	[CC115L_STATUS_STATE_SETTLING] = "SETTLING",
	[CC115L_STATUS_STATE_TX_FIFO_UNDERFLOW] = "TX_FIFO_UNDERFLOW",
};

static void ao_radio_show(void) {
	uint8_t	status = ao_radio_status();
	int	i;

	ao_radio_get(0xff);
	status = ao_radio_status();
	printf ("Status:   %02x\n", status);
	printf ("CHIP_RDY: %d\n", (status >> CC115L_STATUS_CHIP_RDY) & 1);
	printf ("STATE:    %s\n", cc115l_state_name[(status >> CC115L_STATUS_STATE) & CC115L_STATUS_STATE_MASK]);
	printf ("MARC:     %02x\n", ao_radio_get_marcstate());

	ao_radio_put();
}

static void ao_radio_beep(void) {
	ao_radio_rdf();
}

static void ao_radio_packet(void) {
	static const uint8_t packet[] = {
#if 1
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
#else
		3, 1, 2, 3
#endif
	};

	ao_radio_send(packet, sizeof (packet));
}

#if HAS_APRS
#include <ao_aprs.h>

static void
ao_radio_aprs()
{
	ao_packet_slave_stop();
	ao_aprs_send();
}
#endif

static const struct ao_cmds ao_radio_cmds[] = {
	{ ao_radio_test_cmd,	"C <1 start, 0 stop, none both>\0Radio carrier test" },
#if CC115L_DEBUG
#if HAS_APRS
	{ ao_radio_aprs,	"G\0Send APRS packet" },
#endif
	{ ao_radio_show,	"R\0Show CC115L status" },
	{ ao_radio_beep,	"b\0Emit an RDF beacon" },
	{ ao_radio_packet,	"p\0Send a test packet" },
#endif
	{ 0, NULL }
};

void
ao_radio_init(void)
{
	int	i;

	ao_radio_configured = 0;
	ao_spi_init_cs (AO_CC115L_SPI_CS_PORT, (1 << AO_CC115L_SPI_CS_PIN));

#if 0
	AO_CC115L_SPI_CS_PORT->bsrr = ((uint32_t) (1 << AO_CC115L_SPI_CS_PIN));
	for (i = 0; i < 10000; i++) {
		if ((SPI_2_PORT->idr & (1 << SPI_2_MISO_PIN)) == 0)
			break;
	}
	AO_CC115L_SPI_CS_PORT->bsrr = (1 << AO_CC115L_SPI_CS_PIN);
	if (i == 10000)
		ao_panic(AO_PANIC_SELF_TEST_CC115L);
#endif

	/* Enable the EXTI interrupt for the appropriate pin */
	ao_enable_port(AO_CC115L_INT_PORT);
	ao_exti_setup(AO_CC115L_INT_PORT, AO_CC115L_INT_PIN,
		      AO_EXTI_MODE_FALLING|AO_EXTI_PRIORITY_HIGH,
		      ao_radio_isr);

	/* Enable the hacked up GPIO3 pin */
	ao_enable_port(AO_CC115L_MCU_WAKEUP_PORT);
	ao_exti_setup(AO_CC115L_MCU_WAKEUP_PORT, AO_CC115L_MCU_WAKEUP_PIN,
		      AO_EXTI_MODE_FALLING|AO_EXTI_PRIORITY_MED,
		      ao_radio_mcu_wakeup_isr);

	ao_cmd_register(&ao_radio_cmds[0]);
}