--- /dev/null
+/**
+ * http://ad7zj.net/kd7lmo/aprsbeacon_code.html
+ *
+ * @mainpage Pico Beacon
+ *
+ * @section overview_sec Overview
+ *
+ * The Pico Beacon is an APRS based tracking beacon that operates in the UHF 420-450MHz band. The device utilizes a
+ * Microchip PIC 18F2525 embedded controller, Motorola M12+ GPS engine, and Analog Devices AD9954 DDS. The device is capable
+ * of generating a 1200bps A-FSK and 9600 bps FSK AX.25 compliant APRS (Automatic Position Reporting System) message.
+
+
+ *
+ * @section history_sec Revision History
+ *
+ * @subsection v305 V3.05
+ * 23 Dec 2006, Change include; (1) change printf format width to conform to ANSI standard when new CCS 4.xx compiler released.
+ *
+ *
+ * @subsection v304 V3.04
+ * 10 Jan 2006, Change include; (1) added amplitude control to engineering mode,
+ * (2) corrected number of bytes reported in log,
+ * (3) add engineering command to set high rate position reports (5 seconds), and
+ * (4) corrected size of LOG_COORD block when searching for end of log.
+ *
+ * @subsection v303 V3.03
+ * 15 Sep 2005, Change include; (1) removed AD9954 setting SDIO as input pin,
+ * (2) additional comments and Doxygen tags,
+ * (3) integration and test code calculates DDS FTW,
+ * (4) swapped bus and reference analog input ports (hardware change),
+ * (5) added message that indicates we are reading flash log and reports length,
+ * (6) report bus voltage in 10mV steps, and
+ * (7) change log type enumerated values to XORed nibbles for error detection.
+ *
+ *
+ * @subsection v302 V3.02
+ * 6 Apr 2005, Change include; (1) corrected tracked satellite count in NMEA-0183 $GPGGA message,
+ * (2) Doxygen documentation clean up and additions, and
+ * (3) added integration and test code to baseline.
+ *
+ *
+ * @subsection v301 V3.01
+ * 13 Jan 2005, Renamed project and files to Pico Beacon.
+ *
+ *
+ * @subsection v300 V3.00
+ * 15 Nov 2004, Change include; (1) Micro Beacon extreme hardware changes including integral transmitter,
+ * (2) PIC18F2525 processor,
+ * (3) AD9954 DDS support functions,
+ * (4) added comments and formatting for doxygen,
+ * (5) process GPS data with native Motorola protocol,
+ * (6) generate plain text $GPGGA and $GPRMC messages,
+ * (7) power down GPS 5 hours after lock,
+ * (8) added flight data recorder, and
+ * (9) added diagnostics terminal mode.
+ *
+ *
+ * @subsection v201 V2.01
+ * 30 Jan 2004, Change include; (1) General clean up of in-line documentation, and
+ * (2) changed temperature resolution to 0.1 degrees F.
+ *
+ *
+ * @subsection v200 V2.00
+ * 26 Oct 2002, Change include; (1) Micro Beacon II hardware changes including PIC18F252 processor,
+ * (2) serial EEPROM,
+ * (3) GPS power control,
+ * (4) additional ADC input, and
+ * (5) LM60 temperature sensor.
+ *
+ *
+ * @subsection v101 V1.01
+ * 5 Dec 2001, Change include; (1) Changed startup message, and
+ * (2) applied SEPARATE pragma to several methods for memory usage.
+ *
+ *
+ * @subsection v100 V1.00
+ * 25 Sep 2001, Initial release. Flew ANSR-3 and ANSR-4.
+ *
+
+
+ *
+ *
+ * @section copyright_sec Copyright
+ *
+ * Copyright (c) 2001-2009 Michael Gray, KD7LMO
+
+
+ *
+ *
+ * @section gpl_sec GNU General Public License
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+
+
+ *
+ *
+ * @section design Design Details
+ *
+ * Provides design details on a variety of the components that make up the Pico Beacon.
+ *
+ * @subpage power
+ */
+
+/**
+ * @page power Power Consumption
+ *
+ * Measured DC power consumption.
+ *
+ * 3VDC prime power current
+
+ *
+ * 7mA Held in reset
+
+ * 18mA Processor running, all I/O off
+
+ * 110mA GPS running
+
+ * 120mA GPS running w/antenna
+
+ * 250mA DDS running and GPS w/antenna
+
+ * 420mA DDS running, GPS w/antenna, and PA chain on with no RF
+
+ * 900mA Transmit
+
+ *
+ */
+
+#ifndef AO_APRS_TEST
+#include <ao.h>
+#endif
+
+#include <ao_aprs.h>
+
+// Public methods, constants, and data structures for each class.
+
+static void timeInit(void);
+
+static void tncInit(void);
+static void tnc1200TimerTick(void);
+
+/** @} */
+
+/**
+ * @defgroup sys System Library Functions
+ *
+ * Generic system functions similiar to the run-time C library.
+ *
+ * @{
+ */
+
+/**
+ * Calculate the CRC-16 CCITT of buffer that is length bytes long.
+ * The crc parameter allow the calculation on the CRC on multiple buffers.
+ *
+ * @param buffer Pointer to data buffer.
+ * @param length number of bytes in data buffer
+ * @param crc starting value
+ *
+ * @return CRC-16 of buffer[0 .. length]
+ */
+static uint16_t sysCRC16(const uint8_t *buffer, uint8_t length, uint16_t crc)
+{
+ uint8_t i, bit, value;
+
+ for (i = 0; i < length; ++i)
+ {
+ value = buffer[i];
+
+ for (bit = 0; bit < 8; ++bit)
+ {
+ crc ^= (value & 0x01);
+ crc = ( crc & 0x01 ) ? ( crc >> 1 ) ^ 0x8408 : ( crc >> 1 );
+ value = value >> 1;
+ } // END for
+ } // END for
+
+ return crc ^ 0xffff;
+}
+
+/** @} */
+
+/**
+ * @defgroup rtc Real Time Interrupt tick
+ *
+ * Manage the built-in real time interrupt. The interrupt clock PRI is 104uS (9600 bps).
+ *
+ * @{
+ */
+
+/// 16-bit NCO where the upper 8-bits are used to index into the frequency generation table.
+static uint16_t timeNCO;
+
+/// Audio tone NCO update step (phase).
+static uint16_t timeNCOFreq;
+
+/**
+ * Initialize the real-time clock.
+ */
+static void timeInit()
+{
+ timeNCO = 0x00;
+ timeNCOFreq = 0x2000;
+}
+
+/** @} */
+
+/**
+ * @defgroup tnc TNC (Terminal Node Controller)
+ *
+ * Functions that provide a subset of the TNC functions.
+ *
+ * @{
+ */
+
+/// The number of start flag bytes to send before the packet message. (360bits * 1200bps = 300mS)
+#define TNC_TX_DELAY 45
+
+/// The size of the TNC output buffer.
+#define TNC_BUFFER_SIZE 40
+
+/// States that define the current mode of the 1200 bps (A-FSK) state machine.
+typedef enum
+{
+ /// Stand by state ready to accept new message.
+ TNC_TX_READY,
+
+ /// 0x7E bit stream pattern used to define start of APRS message.
+ TNC_TX_SYNC,
+
+ /// Transmit the AX.25 header that contains the source/destination call signs, APRS path, and flags.
+ TNC_TX_HEADER,
+
+ /// Transmit the message data.
+ TNC_TX_DATA,
+
+ /// Transmit the end flag sequence.
+ TNC_TX_END
+} TNC_TX_1200BPS_STATE;
+
+/// AX.25 compliant packet header that contains destination, station call sign, and path.
+/// 0x76 for SSID-11, 0x78 for SSID-12
+static const uint8_t TNC_AX25_HEADER[] = {
+ 'A' << 1, 'P' << 1, 'A' << 1, 'M' << 1, ' ' << 1, ' ' << 1, 0x60, \
+ 'K' << 1, 'D' << 1, '7' << 1, 'S' << 1, 'Q' << 1, 'G' << 1, 0x78, \
+ 'W' << 1, 'I' << 1, 'D' << 1, 'E' << 1, '2' << 1, ' ' << 1, 0x65, \
+ 0x03, 0xf0 };
+
+/// The next bit to transmit.
+static uint8_t tncTxBit;
+
+/// Current mode of the 1200 bps state machine.
+static TNC_TX_1200BPS_STATE tncMode;
+
+/// Counter for each bit (0 - 7) that we are going to transmit.
+static uint8_t tncBitCount;
+
+/// A shift register that holds the data byte as we bit shift it for transmit.
+static uint8_t tncShift;
+
+/// Index into the APRS header and data array for each byte as we transmit it.
+static uint8_t tncIndex;
+
+/// The number of bytes in the message portion of the AX.25 message.
+static uint8_t tncLength;
+
+/// A copy of the last 5 bits we've transmitted to determine if we need to bit stuff on the next bit.
+static uint8_t tncBitStuff;
+
+/// Buffer to hold the message portion of the AX.25 packet as we prepare it.
+static uint8_t tncBuffer[TNC_BUFFER_SIZE];
+
+/**
+ * Initialize the TNC internal variables.
+ */
+static void tncInit()
+{
+ tncTxBit = 0;
+ tncMode = TNC_TX_READY;
+}
+
+/**
+ * Method that is called every 833uS to transmit the 1200bps A-FSK data stream.
+ * The provides the pre and postamble as well as the bit stuffed data stream.
+ */
+static void tnc1200TimerTick()
+{
+ // Set the A-FSK frequency.
+ if (tncTxBit == 0x00)
+ timeNCOFreq = 0x2000;
+ else
+ timeNCOFreq = 0x3aab;
+
+ switch (tncMode)
+ {
+ case TNC_TX_READY:
+ // Generate a test signal alteranting between high and low tones.
+ tncTxBit = (tncTxBit == 0 ? 1 : 0);
+ break;
+
+ case TNC_TX_SYNC:
+ // The variable tncShift contains the lastest data byte.
+ // NRZI enocde the data stream.
+ if ((tncShift & 0x01) == 0x00) {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+ }
+
+ // When the flag is done, determine if we need to send more or data.
+ if (++tncBitCount == 8)
+ {
+ tncBitCount = 0;
+ tncShift = 0x7e;
+
+ // Once we transmit x mS of flags, send the data.
+ // txDelay bytes * 8 bits/byte * 833uS/bit = x mS
+ if (++tncIndex == TNC_TX_DELAY)
+ {
+ tncIndex = 0;
+ tncShift = TNC_AX25_HEADER[0];
+ tncBitStuff = 0;
+ tncMode = TNC_TX_HEADER;
+ } // END if
+ } else
+ tncShift = tncShift >> 1;
+ break;
+
+ case TNC_TX_HEADER:
+ // Determine if we have sent 5 ones in a row, if we have send a zero.
+ if (tncBitStuff == 0x1f)
+ {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+
+ tncBitStuff = 0x00;
+ return;
+ } // END if
+
+ // The variable tncShift contains the lastest data byte.
+ // NRZI enocde the data stream.
+ if ((tncShift & 0x01) == 0x00) {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+ }
+
+ // Save the data stream so we can determine if bit stuffing is
+ // required on the next bit time.
+ tncBitStuff = ((tncBitStuff << 1) | (tncShift & 0x01)) & 0x1f;
+
+ // If all the bits were shifted, get the next byte.
+ if (++tncBitCount == 8)
+ {
+ tncBitCount = 0;
+
+ // After the header is sent, then send the data.
+ if (++tncIndex == sizeof(TNC_AX25_HEADER))
+ {
+ tncIndex = 0;
+ tncShift = tncBuffer[0];
+ tncMode = TNC_TX_DATA;
+ } else
+ tncShift = TNC_AX25_HEADER[tncIndex];
+
+ } else
+ tncShift = tncShift >> 1;
+
+ break;
+
+ case TNC_TX_DATA:
+ // Determine if we have sent 5 ones in a row, if we have send a zero.
+ if (tncBitStuff == 0x1f)
+ {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+
+ tncBitStuff = 0x00;
+ return;
+ } // END if
+
+ // The variable tncShift contains the lastest data byte.
+ // NRZI enocde the data stream.
+ if ((tncShift & 0x01) == 0x00) {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+ }
+
+ // Save the data stream so we can determine if bit stuffing is
+ // required on the next bit time.
+ tncBitStuff = ((tncBitStuff << 1) | (tncShift & 0x01)) & 0x1f;
+
+ // If all the bits were shifted, get the next byte.
+ if (++tncBitCount == 8)
+ {
+ tncBitCount = 0;
+
+ // If everything was sent, transmit closing flags.
+ if (++tncIndex == tncLength)
+ {
+ tncIndex = 0;
+ tncShift = 0x7e;
+ tncMode = TNC_TX_END;
+ } else
+ tncShift = tncBuffer[tncIndex];
+
+ } else
+ tncShift = tncShift >> 1;
+
+ break;
+
+ case TNC_TX_END:
+ // The variable tncShift contains the lastest data byte.
+ // NRZI enocde the data stream.
+ if ((tncShift & 0x01) == 0x00) {
+ if (tncTxBit == 0)
+ tncTxBit = 1;
+ else
+ tncTxBit = 0;
+ }
+
+ // If all the bits were shifted, get the next one.
+ if (++tncBitCount == 8)
+ {
+ tncBitCount = 0;
+ tncShift = 0x7e;
+
+ // Transmit two closing flags.
+ if (++tncIndex == 2)
+ {
+ tncMode = TNC_TX_READY;
+
+ return;
+ } // END if
+ } else
+ tncShift = tncShift >> 1;
+
+ break;
+ } // END switch
+}
+
+/**
+ * Generate the plain text position packet.
+ */
+static int tncPositionPacket(void)
+{
+ int32_t latitude = ao_gps_data.latitude;
+ int32_t longitude = ao_gps_data.longitude;
+ int32_t altitude = ao_gps_data.altitude;
+
+ uint16_t lat_deg;
+ uint16_t lon_deg;
+ uint16_t lat_min;
+ uint16_t lat_frac;
+ uint16_t lon_min;
+ uint16_t lon_frac;
+
+ char lat_sign = 'N', lon_sign = 'E';
+
+ if (latitude < 0) {
+ lat_sign = 'S';
+ latitude = -latitude;
+ }
+
+ if (longitude < 0) {
+ lon_sign = 'W';
+ longitude = -longitude;
+ }
+
+ lat_deg = latitude / 10000000;
+ latitude -= lat_deg * 10000000;
+ latitude *= 60;
+ lat_min = latitude / 10000000;
+ latitude -= lat_min * 10000000;
+ lat_frac = (latitude + 50000) / 100000;
+
+ lon_deg = longitude / 10000000;
+ longitude -= lon_deg * 10000000;
+ longitude *= 60;
+ lon_min = longitude / 10000000;
+ longitude -= lon_min * 10000000;
+ lon_frac = (longitude + 50000) / 100000;
+
+ if (altitude < 0)
+ altitude = 0;
+
+ altitude = altitude * (int32_t) 1000 / (int32_t) 3048;
+
+ return sprintf ((char *) tncBuffer, "=%02u%02u.%02u%c\\%03u%02u.%02u%cO /A=%06u\015",
+ lat_deg, lat_min, lat_frac, lat_sign,
+ lon_deg, lon_min, lon_frac, lon_sign,
+ altitude);
+}
+
+static int16_t
+tncFill(uint8_t *buf, int16_t len)
+{
+ int16_t l = 0;
+ uint8_t b;
+ uint8_t bit;
+
+ while (tncMode != TNC_TX_READY && l < len) {
+ b = 0;
+ for (bit = 0; bit < 8; bit++) {
+ b = b << 1 | (timeNCO >> 15);
+ timeNCO += timeNCOFreq;
+ }
+ *buf++ = b;
+ l++;
+ tnc1200TimerTick();
+ }
+ if (tncMode == TNC_TX_READY)
+ l = -l;
+ return l;
+}
+
+/**
+ * Prepare an AX.25 data packet. Each time this method is called, it automatically
+ * rotates through 1 of 3 messages.
+ *
+ * @param dataMode enumerated type that specifies 1200bps A-FSK or 9600bps FSK
+ */
+void ao_aprs_send(void)
+{
+ uint16_t crc;
+
+ timeInit();
+ tncInit();
+
+ tncLength = tncPositionPacket();
+
+ // Calculate the CRC for the header and message.
+ crc = sysCRC16(TNC_AX25_HEADER, sizeof(TNC_AX25_HEADER), 0xffff);
+ crc = sysCRC16(tncBuffer, tncLength, crc ^ 0xffff);
+
+ // Save the CRC in the message.
+ tncBuffer[tncLength++] = crc & 0xff;
+ tncBuffer[tncLength++] = (crc >> 8) & 0xff;
+
+ // Prepare the variables that are used in the real-time clock interrupt.
+ tncBitCount = 0;
+ tncShift = 0x7e;
+ tncTxBit = 0;
+ tncIndex = 0;
+ tncMode = TNC_TX_SYNC;
+
+ ao_radio_send_lots(tncFill);
+}
+
+/** @} */
/*
* For our RDF beacon, set the symbol rate to 2kBaud (for a 1kHz tone)
*
- * (2**20 - DATARATE_M) * 2 ** DATARATE_E
+ * (2**20 + DATARATE_M) * 2 ** DATARATE_E
* Rdata = -------------------------------------- * fosc
* 2 ** 39
*
- * DATARATE_M = 511705
- * DATARATE_E = 6
+ * DATARATE_M = 25166
+ * DATARATE_E = 5
*
* To make the tone last for 200ms, we need 2000 * .2 = 400 bits or 50 bytes
*/
(0 << CC1120_PKT_CFG0_UART_SWAP_EN)),
};
-static uint8_t ao_radio_mode;
+/*
+ * APRS deviation is 5kHz
+ *
+ * fdev = fosc >> 24 * (256 + dev_m) << dev_e
+ *
+ * 32e6Hz / (2 ** 24) * (256 + 71) * (2 ** 3) = 4989
+ */
+
+#define APRS_DEV_E 3
+#define APRS_DEV_M 71
+#define APRS_PACKET_LEN 50
+
+/*
+ * For our APRS beacon, set the symbol rate to 9.6kBaud (8x oversampling for 1200 baud data rate)
+ *
+ * (2**20 + DATARATE_M) * 2 ** DATARATE_E
+ * Rdata = -------------------------------------- * fosc
+ * 2 ** 39
+ *
+ * DATARATE_M = 239914
+ * DATARATE_E = 7
+ *
+ * Rdata = 9599.998593330383301
+ *
+ */
+#define APRS_DRATE_E 5
+#define APRS_DRATE_M 25166
+
+static const uint16_t aprs_setup[] = {
+ CC1120_DEVIATION_M, APRS_DEV_M,
+ CC1120_MODCFG_DEV_E, ((CC1120_MODCFG_DEV_E_MODEM_MODE_NORMAL << CC1120_MODCFG_DEV_E_MODEM_MODE) |
+ (CC1120_MODCFG_DEV_E_MOD_FORMAT_2_GFSK << CC1120_MODCFG_DEV_E_MOD_FORMAT) |
+ (APRS_DEV_E << CC1120_MODCFG_DEV_E_DEV_E)),
+ CC1120_DRATE2, ((APRS_DRATE_E << CC1120_DRATE2_DATARATE_E) |
+ (((APRS_DRATE_M >> 16) & CC1120_DRATE2_DATARATE_M_19_16_MASK) << CC1120_DRATE2_DATARATE_M_19_16)),
+ CC1120_DRATE1, ((APRS_DRATE_M >> 8) & 0xff),
+ CC1120_DRATE0, ((APRS_DRATE_M >> 0) & 0xff),
+ CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) |
+ (CC1120_PKT_CFG2_PKT_FORMAT_NORMAL << CC1120_PKT_CFG2_PKT_FORMAT)),
+ CC1120_PKT_CFG1, ((0 << CC1120_PKT_CFG1_WHITE_DATA) |
+ (CC1120_PKT_CFG1_ADDR_CHECK_CFG_NONE << CC1120_PKT_CFG1_ADDR_CHECK_CFG) |
+ (CC1120_PKT_CFG1_CRC_CFG_DISABLED << CC1120_PKT_CFG1_CRC_CFG) |
+ (0 << CC1120_PKT_CFG1_APPEND_STATUS)),
+};
+
+#define AO_PKT_CFG0_INFINITE ((0 << CC1120_PKT_CFG0_RESERVED7) | \
+ (CC1120_PKT_CFG0_LENGTH_CONFIG_INFINITE << CC1120_PKT_CFG0_LENGTH_CONFIG) | \
+ (0 << CC1120_PKT_CFG0_PKG_BIT_LEN) | \
+ (0 << CC1120_PKT_CFG0_UART_MODE_EN) | \
+ (0 << CC1120_PKT_CFG0_UART_SWAP_EN))
+
+#define AO_PKT_CFG0_FIXED ((0 << CC1120_PKT_CFG0_RESERVED7) | \
+ (CC1120_PKT_CFG0_LENGTH_CONFIG_FIXED << CC1120_PKT_CFG0_LENGTH_CONFIG) | \
+ (0 << CC1120_PKT_CFG0_PKG_BIT_LEN) | \
+ (0 << CC1120_PKT_CFG0_UART_MODE_EN) | \
+ (0 << CC1120_PKT_CFG0_UART_SWAP_EN))
+
+static uint16_t ao_radio_mode;
#define AO_RADIO_MODE_BITS_PACKET 1
#define AO_RADIO_MODE_BITS_PACKET_TX 2
#define AO_RADIO_MODE_BITS_TX_FINISH 8
#define AO_RADIO_MODE_BITS_PACKET_RX 16
#define AO_RADIO_MODE_BITS_RDF 32
+#define AO_RADIO_MODE_BITS_APRS 64
+#define AO_RADIO_MODE_BITS_INFINITE 128
+#define AO_RADIO_MODE_BITS_FIXED 256
#define AO_RADIO_MODE_NONE 0
#define AO_RADIO_MODE_PACKET_TX_BUF (AO_RADIO_MODE_BITS_PACKET | AO_RADIO_MODE_BITS_PACKET_TX | AO_RADIO_MODE_BITS_TX_BUF)
#define AO_RADIO_MODE_PACKET_TX_FINISH (AO_RADIO_MODE_BITS_PACKET | AO_RADIO_MODE_BITS_PACKET_TX | AO_RADIO_MODE_BITS_TX_FINISH)
#define AO_RADIO_MODE_PACKET_RX (AO_RADIO_MODE_BITS_PACKET | AO_RADIO_MODE_BITS_PACKET_RX)
#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)
+#define AO_RADIO_MODE_APRS_FINISH (AO_RADIO_MODE_BITS_APRS | AO_RADIO_MODE_BITS_FIXED)
static void
-ao_radio_set_mode(uint8_t new_mode)
+ao_radio_set_mode(uint16_t new_mode)
{
- uint8_t changes;
+ uint16_t changes;
int i;
if (new_mode == ao_radio_mode)
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(CC1120_PKT_CFG0, AO_PKT_CFG0_INFINITE);
+
+ if (changes & AO_RADIO_MODE_BITS_FIXED)
+ ao_radio_reg_write(CC1120_PKT_CFG0, AO_PKT_CFG0_FIXED);
+
ao_radio_mode = new_mode;
}
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(CC1120_PKT_LEN, len);
+ last_len = len;
+ }
+}
+
static void
ao_radio_get(uint8_t len)
{
static uint32_t last_radio_setting;
- static uint8_t last_len;
ao_mutex_get(&ao_radio_mutex);
if (!ao_radio_configured)
ao_radio_reg_write(CC1120_FREQ0, ao_config.radio_setting);
last_radio_setting = ao_config.radio_setting;
}
- if (len != last_len) {
- ao_radio_reg_write(CC1120_PKT_LEN, len);
- last_len = len;
- }
+ ao_radio_set_len(len);
}
#define ao_radio_put() ao_mutex_put(&ao_radio_mutex)
}
}
+static uint8_t
+ao_radio_wait_tx(uint8_t wait_fifo)
+{
+ uint8_t fifo_space = 0;
+
+ do {
+ ao_radio_wake = 0;
+ ao_arch_block_interrupts();
+ while (!ao_radio_wake)
+ ao_sleep(&ao_radio_wake);
+ ao_arch_release_interrupts();
+ if (!wait_fifo)
+ return 0;
+ fifo_space = ao_radio_tx_fifo_space();
+ } while (!fifo_space);
+ return fifo_space;
+}
+
static uint8_t tx_data[(AO_RADIO_MAX_SEND + 4) * 2];
void
ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
}
- do {
- ao_radio_wake = 0;
- ao_arch_block_interrupts();
- while (!ao_radio_wake)
- ao_sleep(&ao_radio_wake);
- ao_arch_release_interrupts();
- if (!encode_len)
- break;
- fifo_space = ao_radio_tx_fifo_space();
- } while (!fifo_space);
+ fifo_space = ao_radio_wait_tx(encode_len != 0);
+ }
+ 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 = CC1120_FIFO_SIZE;
+ while (!done) {
+ cnt = (*fill)(buf, sizeof(buf));
+ if (cnt < 0) {
+ done = 1;
+ cnt = -cnt;
+ }
+ total += cnt;
+ if (done) {
+ ao_radio_set_len(total & 0xff);
+ ao_radio_set_mode(AO_RADIO_MODE_APRS_FINISH);
+ } else
+ ao_radio_set_mode(AO_RADIO_MODE_APRS_BUF);
+ b = buf;
+ while (cnt) {
+ uint8_t this_len = cnt;
+ if (this_len > fifo_space)
+ this_len = fifo_space;
+ ao_radio_fifo_write(b, this_len);
+ b += this_len;
+ cnt -= this_len;
+ if (!started) {
+ ao_radio_start_tx();
+ started = 1;
+ }
+ fifo_space = ao_radio_wait_tx(!done || cnt);
+ }
}
ao_radio_put();
}
--- /dev/null
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+#include <ao_telemetry.h>
+
+struct ao_telemetry_location ao_gps_data;
+
+#define AO_APRS_TEST
+
+typedef int16_t (*ao_radio_fill_func)(uint8_t *buffer, int16_t len);
+
+#define DEBUG 0
+#if DEBUG
+void
+ao_aprs_bit(uint8_t bit)
+{
+ static int seq = 0;
+ printf ("%6d %d\n", seq++, bit ? 1 : 0);
+}
+#else
+void
+ao_aprs_bit(uint8_t bit)
+{
+ putchar (bit ? 0xc0 : 0x40);
+}
+#endif
+
+void
+ao_radio_send_lots(ao_radio_fill_func fill);
+
+#include <ao_aprs.c>
+
+/*
+ * @section copyright_sec Copyright
+ *
+ * Copyright (c) 2001-2009 Michael Gray, KD7LMO
+
+
+ *
+ *
+ * @section gpl_sec GNU General Public License
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+
+ */
+
+static void
+audio_gap(int secs)
+{
+#if !DEBUG
+ int samples = secs * 9600;
+
+ while (samples--)
+ ao_aprs_bit(0);
+#endif
+}
+
+// This is where we go after reset.
+int main(int argc, char **argv)
+{
+ audio_gap(1);
+
+ ao_gps_data.latitude = 45.4694766 * 10000000;
+ ao_gps_data.longitude = -122.7376250 * 10000000;
+ ao_gps_data.altitude = 83;
+
+ /* Transmit one packet */
+ ao_aprs_send();
+
+ exit(0);
+}
+
+void
+ao_radio_send_lots(ao_radio_fill_func fill)
+{
+ int16_t len;
+ uint8_t done = 0;
+ uint8_t buf[16], *b, c;
+ uint8_t bit;
+
+ while (!done) {
+ len = (*fill)(buf, sizeof (buf));
+ if (len < 0) {
+ done = 1;
+ len = -len;
+ }
+ b = buf;
+ while (len--) {
+ c = *b++;
+ for (bit = 0; bit < 8; bit++) {
+ ao_aprs_bit(c & 0x80);
+ c <<= 1;
+ }
+ }
+ }
+}
projects / fw / altos / commitdiff