diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/ao_aprs.c | 599 | ||||
| -rw-r--r-- | src/drivers/ao_aprs.h | 24 | ||||
| -rw-r--r-- | src/drivers/ao_cc1120.c | 340 | ||||
| -rw-r--r-- | src/drivers/ao_m25.c | 13 |
4 files changed, 914 insertions, 62 deletions
diff --git a/src/drivers/ao_aprs.c b/src/drivers/ao_aprs.c new file mode 100644 index 00000000..03bcab05 --- /dev/null +++ b/src/drivers/ao_aprs.c @@ -0,0 +1,599 @@ +/** + * 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 uint8_t TNC_AX25_HEADER[] = { + 'A' << 1, 'P' << 1, 'A' << 1, 'M' << 1, ' ' << 1, ' ' << 1, 0x60, \ + 'N' << 1, '0' << 1, 'C' << 1, 'A' << 1, 'L' << 1, 'L' << 1, 0x78, \ + 'W' << 1, 'I' << 1, 'D' << 1, 'E' << 1, '2' << 1, ' ' << 1, 0x65, \ + 0x03, 0xf0 }; + +#define TNC_CALLSIGN_OFF 7 +#define TNC_CALLSIGN_LEN 6 + +static void +tncSetCallsign(void) +{ +#ifndef AO_APRS_TEST + uint8_t i; + + for (i = 0; i < TNC_CALLSIGN_LEN; i++) { + if (!ao_config.callsign[i]) + break; + TNC_AX25_HEADER[TNC_CALLSIGN_OFF + i] = ao_config.callsign[i] << 1; + } + for (; i < TNC_CALLSIGN_LEN; i++) + TNC_AX25_HEADER[TNC_CALLSIGN_OFF + i] = ' ' << 1; +#endif +} + +/// 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; + } + + /* Round latitude and longitude by 0.005 minutes */ + latitude = latitude + 833; + if (latitude > 900000000) + latitude = 900000000; + longitude = longitude + 833; + if (longitude > 1800000000) + longitude = 1800000000; + + lat_deg = latitude / 10000000; + latitude -= lat_deg * 10000000; + latitude *= 60; + lat_min = latitude / 10000000; + latitude -= lat_min * 10000000; + lat_frac = latitude / 100000; + + lon_deg = longitude / 10000000; + longitude -= lon_deg * 10000000; + longitude *= 60; + lon_min = longitude / 10000000; + longitude -= lon_min * 10000000; + lon_frac = longitude / 100000; + + if (altitude < 0) + altitude = 0; + + altitude = (altitude * (int32_t) 10000 + (3048/2)) / (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(); + tncSetCallsign(); + + 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); +} + +/** @} */ diff --git a/src/drivers/ao_aprs.h b/src/drivers/ao_aprs.h new file mode 100644 index 00000000..a033fa0b --- /dev/null +++ b/src/drivers/ao_aprs.h @@ -0,0 +1,24 @@ +/* + * 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. + */ + +#ifndef _AO_APRS_H_ +#define _AO_APRS_H_ + +void +ao_aprs_send(void); + +#endif /* _AO_APRS_H_ */ diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c index f27958f9..3e894f76 100644 --- a/src/drivers/ao_cc1120.c +++ b/src/drivers/ao_cc1120.c @@ -24,10 +24,12 @@ #define AO_RADIO_MAX_RECV sizeof(struct ao_packet) #define AO_RADIO_MAX_SEND sizeof(struct ao_packet) -uint8_t ao_radio_wake; -uint8_t ao_radio_mutex; -uint8_t ao_radio_abort; -uint8_t ao_radio_in_recv; +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_marc_status; /* Last read MARC status value */ #define CC1120_DEBUG AO_FEC_DEBUG #define CC1120_TRACE 0 @@ -218,13 +220,32 @@ ao_radio_recv_abort(void) #define ao_radio_rdf_value 0x55 static uint8_t -ao_radio_marc_status(void) +ao_radio_get_marc_status(void) { return ao_radio_reg_read(CC1120_MARC_STATUS1); } static void -ao_radio_tx_isr(void) +ao_radio_mcu_wakeup_isr(void) +{ + ao_radio_mcu_wake = 1; + ao_wakeup(&ao_radio_wake); +} + + +static void +ao_radio_check_marc_status(void) +{ + ao_radio_mcu_wake = 0; + ao_radio_marc_status = ao_radio_get_marc_status(); + + /* Anyt other than 'tx/rx finished' means an error occurred */ + if (ao_radio_marc_status & ~(CC1120_MARC_STATUS1_TX_FINISHED|CC1120_MARC_STATUS1_RX_FINISHED)) + ao_radio_abort = 1; +} + +static void +ao_radio_isr(void) { ao_exti_disable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN); ao_radio_wake = 1; @@ -234,8 +255,9 @@ ao_radio_tx_isr(void) static void ao_radio_start_tx(void) { - ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_tx_isr); + ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_isr); ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN); + ao_exti_enable(AO_CC1120_MCU_WAKEUP_PORT, AO_CC1120_MCU_WAKEUP_PIN); ao_radio_strobe(CC1120_STX); } @@ -247,6 +269,8 @@ ao_radio_idle(void) if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_IDLE) break; } + /* Flush any pending TX bytes */ + ao_radio_strobe(CC1120_SFTX); } /* @@ -261,7 +285,7 @@ ao_radio_idle(void) #define PACKET_DEV_M 80 /* - * For our packet data, set the symbol rate to 38360 Baud + * For our packet data, set the symbol rate to 38400 Baud * * (2**20 + DATARATE_M) * 2 ** DATARATE_E * Rdata = -------------------------------------- * fosc @@ -294,18 +318,19 @@ static const uint16_t packet_setup[] = { (0 << CC1120_PKT_CFG0_PKG_BIT_LEN) | (0 << CC1120_PKT_CFG0_UART_MODE_EN) | (0 << CC1120_PKT_CFG0_UART_SWAP_EN)), + AO_CC1120_MARC_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_MARC_MCU_WAKEUP, }; static const uint16_t packet_tx_setup[] = { 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_IOCFG2, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG, + AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG, }; static const uint16_t packet_rx_setup[] = { CC1120_PKT_CFG2, ((CC1120_PKT_CFG2_CCA_MODE_ALWAYS_CLEAR << CC1120_PKT_CFG2_CCA_MODE) | (CC1120_PKT_CFG2_PKT_FORMAT_SYNCHRONOUS_SERIAL << CC1120_PKT_CFG2_PKT_FORMAT)), - CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_CLKEN_SOFT, + AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_CLKEN_SOFT, }; /* @@ -323,12 +348,12 @@ static const uint16_t packet_rx_setup[] = { /* * 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 */ @@ -358,7 +383,64 @@ static const uint16_t rdf_setup[] = { (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 7 +#define APRS_DRATE_M 239914 + +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 @@ -366,17 +448,23 @@ static uint8_t ao_radio_mode; #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 | 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(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) @@ -392,10 +480,10 @@ ao_radio_set_mode(uint8_t new_mode) ao_radio_reg_write(packet_tx_setup[i], packet_tx_setup[i+1]); if (changes & AO_RADIO_MODE_BITS_TX_BUF) - ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_TXFIFO_THR); + ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_TXFIFO_THR); if (changes & AO_RADIO_MODE_BITS_TX_FINISH) - ao_radio_reg_write(CC1120_IOCFG2, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG); + ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_RX0TX1_CFG); if (changes & AO_RADIO_MODE_BITS_PACKET_RX) for (i = 0; i < sizeof (packet_rx_setup) / sizeof (packet_rx_setup[0]); i += 2) @@ -404,6 +492,17 @@ ao_radio_set_mode(uint8_t new_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; } @@ -431,10 +530,20 @@ ao_radio_setup(void) } 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) @@ -445,10 +554,7 @@ ao_radio_get(uint8_t len) 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) @@ -470,9 +576,11 @@ ao_rdf_run(void) ao_radio_start_tx(); ao_arch_block_interrupts(); - while (!ao_radio_wake && !ao_radio_abort) + 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_marc_status(); if (!ao_radio_wake) ao_radio_idle(); ao_radio_put(); @@ -562,6 +670,31 @@ ao_radio_test_cmd(void) } } +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_marc_status(); +} + +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 @@ -583,6 +716,7 @@ ao_radio_send(const void *d, uint8_t 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); @@ -601,16 +735,81 @@ ao_radio_send(const void *d, uint8_t size) 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) + 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 = CC1120_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; - fifo_space = ao_radio_tx_fifo_space(); - } while (!fifo_space); + 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_CC1120_INT_PORT, AO_CC1120_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(); } @@ -660,14 +859,21 @@ ao_radio_rx_isr(void) static uint16_t ao_radio_rx_wait(void) { - ao_arch_block_interrupts(); - rx_waiting = 1; - while (rx_data_cur - rx_data_consumed < AO_FEC_DECODE_BLOCK && - !ao_radio_abort) { - ao_sleep(&ao_radio_wake); - } - rx_waiting = 0; - ao_arch_release_interrupts(); + do { + if (ao_radio_mcu_wake) + ao_radio_check_marc_status(); + ao_arch_block_interrupts(); + rx_waiting = 1; + while (rx_data_cur - rx_data_consumed < AO_FEC_DECODE_BLOCK && + !ao_radio_abort && + !ao_radio_mcu_wake) + { + if (ao_sleep(&ao_radio_wake)) + ao_radio_abort = 1; + } + rx_waiting = 0; + ao_arch_release_interrupts(); + } while (ao_radio_mcu_wake); if (ao_radio_abort) return 0; rx_data_consumed += AO_FEC_DECODE_BLOCK; @@ -703,30 +909,53 @@ ao_radio_recv(__xdata void *d, uint8_t size) rx_data_consumed = 0; rx_ignore = 2; + /* Must be set before changing the frequency; any abort + * after the frequency is set needs to terminate the read + * so that the registers can be reprogrammed + */ ao_radio_abort = 0; - ao_radio_in_recv = 1; + /* configure interrupt pin */ ao_radio_get(len); ao_radio_set_mode(AO_RADIO_MODE_PACKET_RX); ao_radio_wake = 0; + ao_radio_mcu_wake = 0; stm_spi2.cr2 = 0; /* clear any RXNE */ (void) stm_spi2.dr; - ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_rx_isr); + /* Have the radio signal when the preamble quality goes high */ + ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_PQT_REACHED); + ao_exti_set_mode(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, + AO_EXTI_MODE_RISING|AO_EXTI_PRIORITY_HIGH); + ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_isr); ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN); + ao_exti_enable(AO_CC1120_MCU_WAKEUP_PORT, AO_CC1120_MCU_WAKEUP_PIN); ao_radio_strobe(CC1120_SRX); + /* Wait for the preamble to appear */ + ao_radio_wait_isr(); + if (ao_radio_abort) + goto abort; + + ao_radio_reg_write(AO_CC1120_INT_GPIO_IOCFG, CC1120_IOCFG_GPIO_CFG_CLKEN_SOFT); + ao_exti_set_mode(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, + AO_EXTI_MODE_FALLING|AO_EXTI_PRIORITY_HIGH); + + ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_rx_isr); + ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN); + ao_radio_burst_read_start(CC1120_SOFT_RX_DATA_OUT); ret = ao_fec_decode(rx_data, rx_data_count, d, size + 2, ao_radio_rx_wait); ao_radio_burst_read_stop(); +abort: ao_radio_strobe(CC1120_SIDLE); /* Convert from 'real' rssi to cc1111-style values */ @@ -739,11 +968,6 @@ ao_radio_recv(__xdata void *d, uint8_t size) ((uint8_t *) d)[size] = (uint8_t) rssi; - ao_radio_in_recv = 0; - - if (ao_radio_abort) - ao_delay(1); - #if AO_PROFILE rx_last_done_tick = rx_done_tick; rx_done_tick = ao_profile_tick(); @@ -963,7 +1187,7 @@ static void ao_radio_show(void) { printf ("Status: %02x\n", status); printf ("CHIP_RDY: %d\n", (status >> CC1120_STATUS_CHIP_RDY) & 1); printf ("STATE: %s\n", cc1120_state_name[(status >> CC1120_STATUS_STATE) & CC1120_STATUS_STATE_MASK]); - printf ("MARC: %02x\n", ao_radio_marc_status()); + printf ("MARC: %02x\n", ao_radio_get_marc_status()); for (i = 0; i < AO_NUM_CC1120_REG; i++) printf ("\t%02x %-20.20s\n", ao_radio_reg_read(ao_cc1120_reg[i].addr), ao_cc1120_reg[i].name); @@ -1007,11 +1231,21 @@ ao_radio_test_recv() } } +#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 CC1120_DEBUG + { ao_radio_aprs, "G\0Send APRS packet" }, { ao_radio_show, "R\0Show CC1120 status" }, { ao_radio_beep, "b\0Emit an RDF beacon" }, { ao_radio_packet, "p\0Send a test packet" }, @@ -1043,7 +1277,13 @@ ao_radio_init(void) ao_enable_port(AO_CC1120_INT_PORT); ao_exti_setup(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, AO_EXTI_MODE_FALLING|AO_EXTI_PRIORITY_HIGH, - ao_radio_tx_isr); + ao_radio_isr); + + /* Enable the hacked up GPIO3 pin */ + ao_enable_port(AO_CC1120_MCU_WAKEUP_PORT); + ao_exti_setup(AO_CC1120_MCU_WAKEUP_PORT, AO_CC1120_MCU_WAKEUP_PIN, + AO_EXTI_MODE_FALLING|AO_EXTI_PRIORITY_MED, + ao_radio_mcu_wakeup_isr); ao_cmd_register(&ao_radio_cmds[0]); } diff --git a/src/drivers/ao_m25.c b/src/drivers/ao_m25.c index 9603c1de..9f696ace 100644 --- a/src/drivers/ao_m25.c +++ b/src/drivers/ao_m25.c @@ -99,18 +99,7 @@ static __xdata uint8_t ao_m25_mutex; static __xdata uint8_t ao_m25_instruction[4]; -#if HAS_BOOT_RADIO -extern uint8_t ao_radio_in_recv; - -static void ao_boot_radio(void) { - if (ao_radio_in_recv) - ao_radio_recv_abort(); -} -#else -#define ao_boot_radio() -#endif - -#define M25_SELECT(cs) do { ao_boot_radio(); ao_spi_get_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS, AO_SPI_SPEED_FAST); } while (0) +#define M25_SELECT(cs) ao_spi_get_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS, AO_SPI_SPEED_FAST) #define M25_DESELECT(cs) ao_spi_put_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS) #define M25_BLOCK_SHIFT 16 |