diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/ao_aprs.c | 545 | ||||
| -rw-r--r-- | src/test/ao_aprs_test.c | 3 |
2 files changed, 17 insertions, 531 deletions
diff --git a/src/drivers/ao_aprs.c b/src/drivers/ao_aprs.c index b45ef8c5..c1a800a9 100644 --- a/src/drivers/ao_aprs.c +++ b/src/drivers/ao_aprs.c @@ -152,110 +152,12 @@ typedef int32_t int32; // Public methods, constants, and data structures for each class. -/// Operational modes of the AD9954 DDS for the ddsSetMode function. -typedef enum -{ - /// Device has not been initialized. - DDS_MODE_NOT_INITIALIZED, - - /// Device in lowest power down mode. - DDS_MODE_POWERDOWN, - - /// Generate FM modulated audio tones. - DDS_MODE_AFSK, - - /// Generate true FSK tones. - DDS_MODE_FSK -} DDS_MODE; - void ddsInit(); void ddsSetAmplitude (uint8_t amplitude); void ddsSetOutputScale (uint16_t amplitude); void ddsSetFSKFreq (uint32_t ftw0, uint32_t ftw1); void ddsSetFreq (uint32_t freq); void ddsSetFTW (uint32_t ftw); -void ddsSetMode (DDS_MODE mode); - -/// Type of GPS fix. -typedef enum -{ - /// No GPS FIX - GPS_NO_FIX, - - /// 2D (Latitude/Longitude) fix. - GPS_2D_FIX, - - /// 3D (Latitude/Longitude/Altitude) fix. - GPS_3D_FIX -} GPS_FIX_TYPE; - -/// GPS Position information. -typedef struct -{ - /// Flag that indicates the position information has been updated since it was last checked. - bool_t updateFlag; - - /// Month in UTC time. - uint8_t month; - - /// Day of month in UTC time. - uint8_t day; - - /// Hours in UTC time. - uint8_t hours; - - /// Minutes in UTC time. - uint8_t minutes; - - /// Seconds in UTC time. - uint8_t seconds; - - /// Year in UTC time. - uint16_t year; - - /// Latitude in milli arc-seconds where + is North, - is South. - int32_t latitude; - - /// Longitude in milli arc-seconds where + is East, - is West. - int32_t longitude; - - /// Altitude in cm - int32_t altitudeCM; - - /// Calculated altitude in feet - int32_t altitudeFeet; - - /// 3D speed in cm/second. - uint16_t vSpeed; - - /// 2D speed in cm/second. - uint16_t hSpeed; - - /// Heading units of 0.1 degrees. - uint16_t heading; - - /// DOP (Dilution of Precision) - uint16_t dop; - - /// 16-bit number that represents status of GPS engine. - uint16_t status; - - /// Number of tracked satellites used in the fix position. - uint8_t trackedSats; - - /// Number of visible satellites. - uint8_t visibleSats; -} GPSPOSITION_STRUCT; - -GPSPOSITION_STRUCT gpsPosition; - -void gpsInit(); -bool_t gpsIsReady(); -GPS_FIX_TYPE gpsGetFixType(); -int32_t gpsGetPeakAltitude(); -void gpsPowerOn(); -bool_t gpsSetup(); -void gpsUpdate(); uint16_t sysCRC16(uint8_t *buffer, uint8_t length, uint16_t crc); @@ -264,27 +166,12 @@ void timeInit(); void timeSetDutyCycle (uint8_t dutyCycle); void timeUpdate(); -/// Operational modes of the TNC for the tncSetMode function. -typedef enum -{ - /// No operation waiting for setup and configuration. - TNC_MODE_STANDBY, - - /// 1200 bps using A-FSK (Audio FSK) tones. - TNC_MODE_1200_AFSK, - - /// 9600 bps using true FSK tones. - TNC_MODE_9600_FSK -} TNC_DATA_MODE; - void tncInit(); bool_t tncIsFree(); void tncHighRate(bool_t state); -void tncSetMode (TNC_DATA_MODE dataMode); void tnc1200TimerTick(); -void tnc9600TimerTick(); void tncTxByte (uint8_t value); -void tncTxPacket(TNC_DATA_MODE dataMode); +void tncTxPacket(void); /** @} */ @@ -296,42 +183,6 @@ void tncTxPacket(TNC_DATA_MODE dataMode); * @{ */ -/// AD9954 CFR1 - Control functions including RAM, profiles, OSK, sync, sweep, SPI, and power control settings. -#define DDS_AD9954_CFR1 0x00 - -/// AD9954 CFR2 - Control functions including sync, PLL multiplier, VCO range, and charge pump current. -#define DDS_AD9954_CFR2 0x01 - -/// AD9954 ASF - Auto ramp rate speed control and output scale factor (0x0000 to 0x3fff). -#define DDS_AD9954_ASF 0x02 - -/// AD9954 ARR - Amplitude ramp rate for OSK function. -#define DDS_AD9954_ARR 0x03 - -/// AD9954 FTW0 - Frequency tuning word 0. -#define DDS_AD9954_FTW0 0x04 - -/// AD9954 FTW1 - Frequency tuning word 1 -#define DDS_AD9954_FTW1 0x06 - -/// AD9954 NLSCW - Negative Linear Sweep Control Word used for spectral shaping in FSK mode -#define DDS_AD9954_NLSCW 0x07 - -/// AD9954 PLSCW - Positive Linear Sweep Control Word used for spectral shaping in FSK mode -#define DDS_AD9954_PLSCW 0x08 - -/// AD9954 RSCW0 - RAM Segment Control Word 0 -#define DDS_AD9954_RWCW0 0x07 - -/// AD9954 RSCW0 - RAM Segment Control Word 1 -#define DDS_AD9954_RWCW1 0x08 - -/// AD9954 RAM segment -#define DDS_RAM 0x0b - -/// Current operational mode. -DDS_MODE ddsMode; - /// Number of digits in DDS frequency to FTW conversion. #define DDS_FREQ_TO_FTW_DIGITS 9 @@ -398,287 +249,8 @@ void ddsSetFTW (uint32_t ftw) putchar (x > 0 ? 0xc0 : 0x40); } -/** - * Convert frequency in hertz to 32-bit DDS FTW (Frequency Tune Word). - * - * @param freq frequency in Hertz - * - */ -void ddsSetFreq(uint32_t freq) -{ - uint8_t i; - uint32_t ftw; - - // To avoid rounding errors with floating point math, we do a long multiply on the data. - ftw = freq * DDS_MULT[0]; - - for (i = 0; i < DDS_FREQ_TO_FTW_DIGITS - 1; ++i) - ftw += (freq * DDS_MULT[i+1]) / DDS_DIVISOR[i]; - - ddsSetFTW (ftw); -} - -/** - * Set DDS frequency tuning word for the FSK 0 and 1 values. The output frequency is equal - * to RefClock * (ftw / 2 ^ 32). - * - * @param ftw0 frequency tuning word for the FSK 0 value - * @param ftw1 frequency tuning word for the FSK 1 value - */ -void ddsSetFSKFreq (uint32_t ftw0, uint32_t ftw1) -{ -// printf ("ftw0 %d ftw1 %d\n", ftw0, ftw1); -} - -/** - * Set the DDS to run in A-FSK, FSK, or PSK31 mode - * - * @param mode DDS_MODE_APRS, DDS_MODE_PSK31, or DDS_MODE_HF_APRS constant - */ -void ddsSetMode (DDS_MODE mode) -{ -// printf ("mode %d\n", mode); -} - -/** @} */ - -/** - * @defgroup GPS Motorola M12+ GPS Engine - * - * Functions to control the Motorola M12+ GPS engine in native binary protocol mode. - * - * @{ - */ - -/// The maximum length of a binary GPS engine message. -#define GPS_BUFFER_SIZE 50 - -/// GPS parse engine state machine values. -typedef enum -{ - /// 1st start character '@' - GPS_START1, - - /// 2nd start character '@' - GPS_START2, - - /// Upper case 'A' - 'Z' message type - GPS_COMMAND1, - - /// Lower case 'a' - 'z' message type - GPS_COMMAND2, - - /// 0 - xx bytes based on message type 'Aa' - GPS_READMESSAGE, - - /// 8-bit checksum - GPS_CHECKSUMMESSAGE, - - /// End of message - Carriage Return - GPS_EOMCR, - - /// End of message - Line Feed - GPS_EOMLF -} GPS_PARSE_STATE_MACHINE; - -/// Index into gpsBuffer used to store message data. -uint8_t gpsIndex; - -/// State machine used to parse the GPS message stream. -GPS_PARSE_STATE_MACHINE gpsParseState; - -/// Buffer to store data as it is read from the GPS engine. -uint8_t gpsBuffer[GPS_BUFFER_SIZE]; - -/// Peak altitude detected while GPS is in 3D fix mode. -int32_t gpsPeakAltitude; - -/// Checksum used to verify binary message from GPS engine. -uint8_t gpsChecksum; - -/// Last verified GPS message received. -GPSPOSITION_STRUCT gpsPosition; - -/** - * Get the type of fix. - * - * @return gps fix type enumeration - */ -GPS_FIX_TYPE gpsGetFixType() -{ - // The upper 3-bits determine the fix type. - switch (gpsPosition.status & 0xe000) - { - case 0xe000: - return GPS_3D_FIX; - - case 0xc000: - return GPS_2D_FIX; - - default: - return GPS_NO_FIX; - } // END switch -} - -/** - * Peak altitude detected while GPS is in 3D fix mode since the system was booted. - * - * @return altitude in feet - */ -int32_t gpsGetPeakAltitude() -{ - return gpsPeakAltitude; -} - -/** - * Initialize the GPS subsystem. - */ -void gpsInit() -{ - // Initial parse state. - gpsParseState = GPS_START1; - - // Assume we start at sea level. - gpsPeakAltitude = 0; - - // Clear the structure that stores the position message. - memset (&gpsPosition, 0, sizeof(GPSPOSITION_STRUCT)); - - // Setup the timers used to measure the 1-PPS time period. -// setup_timer_3(T3_INTERNAL | T3_DIV_BY_1); -// setup_ccp2 (CCP_CAPTURE_RE | CCP_USE_TIMER3); -} - -/** - * Determine if new GPS message is ready to process. This function is a one shot and - * typically returns true once a second for each GPS position fix. - * - * @return true if new message available; otherwise false - */ -bool_t gpsIsReady() -{ - return true; - if (gpsPosition.updateFlag) - { - gpsPosition.updateFlag = false; - return true; - } // END if - - return false; -} - -/** - * Calculate NMEA-0183 message checksum of buffer that is length bytes long. - * - * @param buffer pointer to data buffer. - * @param length number of bytes in buffer. - * - * @return checksum of buffer - */ -uint8_t gpsNMEAChecksum (uint8_t *buffer, uint8_t length) -{ - uint8_t i, checksum; - - checksum = 0; - - for (i = 0; i < length; ++i) - checksum ^= buffer[i]; - - return checksum; -} - -/** - * Verify the GPS engine is sending the @@Hb position report message. If not, - * configure the GPS engine to send the desired report. - * - * @return true if GPS engine operation; otherwise false - */ -bool_t gpsSetup() -{ - uint8_t startTime, retryCount; - - // We wait 10 seconds for the GPS engine to respond to our message request. - startTime = timeGetTicks(); - retryCount = 0; - - while (++retryCount < 10) - { - // Read the serial FIFO and process the GPS messages. -// gpsUpdate(); - - // If a GPS data set is available, then GPS is operational. - if (gpsIsReady()) - { -// timeSetDutyCycle (TIME_DUTYCYCLE_10); - return true; - } - - if (timeGetTicks() > startTime) - { - puts ("@@Hb\001\053\015\012"); - startTime += 10; - } // END if - - } // END while - - return false; -} - -/** - * Parse the Motorola @@Hb (Short position/message) report. - */ -void gpsParsePositionMessage() -{ - // Convert the binary stream into data elements. We will scale to the desired units - // as the values are used. - gpsPosition.updateFlag = true; - - gpsPosition.month = gpsBuffer[0]; - gpsPosition.day = gpsBuffer[1]; - gpsPosition.year = ((uint16_t) gpsBuffer[2] << 8) | gpsBuffer[3]; - gpsPosition.hours = gpsBuffer[4]; - gpsPosition.minutes = gpsBuffer[5]; - gpsPosition.seconds = gpsBuffer[6]; - gpsPosition.latitude = ((int32) gpsBuffer[11] << 24) | ((int32) gpsBuffer[12] << 16) | ((int32) gpsBuffer[13] << 8) | (int32) gpsBuffer[14]; - gpsPosition.longitude = ((int32) gpsBuffer[15] << 24) | ((int32) gpsBuffer[16] << 16) | ((int32) gpsBuffer[17] << 8) | gpsBuffer[18]; - gpsPosition.altitudeCM = ((int32) gpsBuffer[19] << 24) | ((int32) gpsBuffer[20] << 16) | ((int32) gpsBuffer[21] << 8) | gpsBuffer[22]; - gpsPosition.altitudeFeet = gpsPosition.altitudeCM * 100l / 3048l; - gpsPosition.vSpeed = ((uint16_t) gpsBuffer[27] << 8) | gpsBuffer[28]; - gpsPosition.hSpeed = ((uint16_t) gpsBuffer[29] << 8) | gpsBuffer[30]; - gpsPosition.heading = ((uint16_t) gpsBuffer[31] << 8) | gpsBuffer[32]; - gpsPosition.dop = ((uint16_t) gpsBuffer[33] << 8) | gpsBuffer[34]; - gpsPosition.visibleSats = gpsBuffer[35]; - gpsPosition.trackedSats = gpsBuffer[36]; - gpsPosition.status = ((uint16_t) gpsBuffer[37] << 8) | gpsBuffer[38]; - - // Update the peak altitude if we have a valid 3D fix. - if (gpsGetFixType() == GPS_3D_FIX) - if (gpsPosition.altitudeFeet > gpsPeakAltitude) - gpsPeakAltitude = gpsPosition.altitudeFeet; -} - -/** - * Turn on the GPS engine power and serial interface. - */ -void gpsPowerOn() -{ - // 3.0 VDC LDO control line. -// output_high (IO_GPS_PWR); - -} - -/** - * Turn off the GPS engine power and serial interface. - */ -void gpsPowerOff() -{ - // 3.0 VDC LDO control line. -// output_low (IO_GPS_PWR); -} - /** @} */ - /** * @defgroup sys System Library Functions * @@ -759,9 +331,6 @@ uint16_t timeNCOFreq; /// Counter used to deciminate down from the 104uS to 833uS interrupt rate. (9600 to 1200 baud) uint8_t timeLowRateCount; -/// Current TNC mode (standby, 1200bps A-FSK, or 9600bps FSK) -TNC_DATA_MODE tncDataMode; - /// Flag set true once per second. bool_t timeUpdateFlag; @@ -797,7 +366,6 @@ void timeInit() timeNCO = 0x00; timeLowRateCount = 0; timeNCOFreq = 0x2000; - tncDataMode = TNC_MODE_STANDBY; timeRunFlag = false; } @@ -833,29 +401,16 @@ void timeUpdate() { // Setup the next interrupt for the operational mode. timeCompare += TIME_RATE; -// CCP_1 = timeCompare; - - switch (tncDataMode) - { - case TNC_MODE_STANDBY: - break; - case TNC_MODE_1200_AFSK: - ddsSetFTW (freqTable[timeNCO >> 8]); + ddsSetFTW (freqTable[timeNCO >> 8]); - timeNCO += timeNCOFreq; + timeNCO += timeNCOFreq; - if (++timeLowRateCount == 8) - { - timeLowRateCount = 0; - tnc1200TimerTick(); - } // END if - break; - - case TNC_MODE_9600_FSK: - tnc9600TimerTick(); - break; - } // END switch + if (++timeLowRateCount == 8) + { + timeLowRateCount = 0; + tnc1200TimerTick(); + } // END if } /** @} */ @@ -982,32 +537,6 @@ void tncHighRate(bool_t state) } /** - * Configure the TNC for the desired data mode. - * - * @param dataMode enumerated type that specifies 1200bps A-FSK or 9600bps FSK - */ -void tncSetMode(TNC_DATA_MODE dataMode) -{ - switch (dataMode) - { - case TNC_MODE_1200_AFSK: - ddsSetMode (DDS_MODE_AFSK); - break; - - case TNC_MODE_9600_FSK: - ddsSetMode (DDS_MODE_FSK); - - // FSK tones at 445.947 and 445.953 MHz - ddsSetFSKFreq (955382980, 955453621); - break; - case TNC_MODE_STANDBY: - break; - } // END switch - - tncDataMode = dataMode; -} - -/** * Determine if the seconds value timeSeconds is a valid time slot to transmit * a message. Time seconds is in UTC. * @@ -1197,14 +726,6 @@ void tnc1200TimerTick() { tncMode = TNC_TX_READY; - // Tell the TNC time interrupt to stop generating the frequency words. - tncDataMode = TNC_MODE_STANDBY; - - // Key off the DDS. -// output_low (IO_OSK); -// output_low (IO_PTT); - ddsSetMode (DDS_MODE_POWERDOWN); - return; } // END if } else @@ -1223,36 +744,6 @@ void tnc9600TimerTick() } /** - * Write character to the TNC buffer. Maintain the pointer - * and length to the buffer. The pointer tncBufferPnt and tncLength - * must be set before calling this function for the first time. - * - * @param character to save to telemetry buffer - */ -void tncTxByte (uint8_t character) -{ - *tncBufferPnt++ = character; - ++tncLength; -} - -static void -tncPrintf(char *fmt, ...) -{ - va_list ap; - int c; - - va_start(ap, fmt); - c = vsprintf((char *) tncBufferPnt, fmt, ap); - if (*fmt == '\015') - fprintf (stderr, "\n"); - else - vfprintf(stderr, fmt, ap); - va_end(ap); - tncBufferPnt += c; - tncLength += c; -} - -/** * Generate the plain text position packet. Data is written through the tncTxByte * callback function */ @@ -1267,6 +758,7 @@ void tncPositionPacket(void) uint16_t lat_frac; uint16_t lon_min; uint16_t lon_frac; + int c; char lat_sign = 'N', lon_sign = 'E'; @@ -1294,10 +786,12 @@ void tncPositionPacket(void) longitude -= lon_min * 10000000; lon_frac = (longitude + 50000) / 100000; - tncPrintf ("=%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 * 100 / 3048); + c = sprintf ((char *) tncBufferPnt, "=%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 * 100 / 3048); + tncBufferPnt += c; + tncLength += c; } /** @@ -1306,17 +800,10 @@ void tncPositionPacket(void) * * @param dataMode enumerated type that specifies 1200bps A-FSK or 9600bps FSK */ -void tncTxPacket(TNC_DATA_MODE dataMode) +void tncTxPacket(void) { uint16_t crc; - // Only transmit if there is not another message in progress. - if (tncMode != TNC_TX_READY) - return; - - // Configure the DDS for the desired operational. - tncSetMode (dataMode); - // Set a pointer to our TNC output buffer. tncBufferPnt = tncBuffer; diff --git a/src/test/ao_aprs_test.c b/src/test/ao_aprs_test.c index 947a02b4..93dab577 100644 --- a/src/test/ao_aprs_test.c +++ b/src/test/ao_aprs_test.c @@ -66,13 +66,12 @@ audio_gap(int secs) // This is where we go after reset. int main(int argc, char **argv) { - gpsInit(); tncInit(); audio_gap(1); /* Transmit one packet */ - tncTxPacket(TNC_MODE_1200_AFSK); + tncTxPacket(); exit(0); } |