kopia lustrzana https://github.com/bristol-seds/pico-tracker
Added rf tests, confirmed aprs deviation and added notes
Richard Meadows
rodzic
c5a01bab25
commit
6e584b2ad3
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@ -42,9 +42,10 @@
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/**
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* The fm deviation setting for the si radio
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*
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* More work required to determine this value..
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* With the current si filter settings this is equal to the deviation
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* of the high tone.
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*/
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#define AX25_DEVIATION 1800 /* corresponds to about ±2.5kHz maybe */
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#define AX25_DEVIATION 2500
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/**
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* How often our handler gets called
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@ -0,0 +1,42 @@
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/*
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* Radio testing functions. NOT FOR FLIGHT
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* Copyright (C) 2015 Richard Meadows <richardeoin>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef RF_TESTS_H
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#define RF_TESTS_H
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enum rf_tests {
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RF_TEST_NONE,
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RF_TEST_APRS,
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RF_TEST_APRS_HIGH_FM_TONE,
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RF_TEST_APRS_TONE,
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RF_TEST_TELEMETRY_TONE,
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};
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#define RF_TEST RF_TEST_APRS
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#include "samd20.h"
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void rf_tests(void);
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#endif /* RF_TESTS_H */
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@ -0,0 +1,118 @@
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/*
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* Radio testing functions. NOT FOR FLIGHT
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* Copyright (C) 2015 Richard Meadows <richardeoin>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "samd20.h"
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#include "hw_config.h"
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#include "si_trx.h"
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#include "si_trx_defs.h"
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#include "telemetry.h"
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#include "aprs.h"
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#include "ax25.h"
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#define APRS_TEST_LAT 51.47
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#define APRS_TEST_LON -2.58
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#define APRS_TEST_ALTITUDE 43
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#define APRS_TEST_FREQUENCY 144800000
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void telemetry_tone(void)
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{
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while (1) {
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si_trx_on(SI_MODEM_MOD_TYPE_CW, TELEMETRY_FREQUENCY, 0, 36);
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for (int i = 0; i < 200*1000; i++);
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si_trx_off();
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si_trx_on(SI_MODEM_MOD_TYPE_CW, TELEMETRY_FREQUENCY, 0, 0x7f);
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for (int i = 0; i < 200*1000; i++);
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si_trx_off();
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}
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}
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void aprs_tone(void)
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{
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while (1) {
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si_trx_on(SI_MODEM_MOD_TYPE_CW, APRS_TEST_FREQUENCY, 0, 36);
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for (int i = 0; i < 200*1000; i++);
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si_trx_off();
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si_trx_on(SI_MODEM_MOD_TYPE_CW, APRS_TEST_FREQUENCY, 0, 0x7f);
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for (int i = 0; i < 200*1000; i++);
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si_trx_off();
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}
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}
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/**
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* Transmits the high aprs tone (2200Hz)
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*/
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void aprs_high_fm_tone(void)
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{
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ax25_gpio1_pwm_init();
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/* Space */
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system_gclk_gen_set_config(GCLK_GENERATOR_7,
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GCLK_SOURCE_GCLKGEN1, /* Source */
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false, /* High When Disabled */
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AX25_DIVISION_SPACE, /* Division Factor */
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false, /* Run in standby */
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false); /* Output Pin Enable */
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si_trx_on(SI_MODEM_MOD_TYPE_2GFSK, APRS_TEST_FREQUENCY,
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AX25_DEVIATION, APRS_POWER);
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while (1);
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}
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/**
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* APRS function for use during testing. Not for flight
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*/
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void aprs_test(void)
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{
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while(1) {
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/* Set location */
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aprs_set_location(APRS_TEST_LAT, APRS_TEST_LON, APRS_TEST_ALTITUDE);
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/* Set frequency */
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telemetry_aprs_set_frequency(APRS_TEST_FREQUENCY);
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/* Transmit packet and wait */
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telemetry_start(TELEMETRY_APRS, 0xFFFF);
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while (telemetry_active());
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}
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}
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void rf_tests(void)
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{
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switch(RF_TEST) {
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case RF_TEST_APRS:
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aprs_test();
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break;
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case RF_TEST_APRS_HIGH_FM_TONE:
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aprs_high_fm_tone();
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break;
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case RF_TEST_APRS_TONE:
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aprs_tone();
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break;
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case RF_TEST_TELEMETRY_TONE:
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telemetry_tone();
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break;
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default:
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break;
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}
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}
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@ -447,11 +447,17 @@ void si_trx_reset(uint8_t modulation_type, uint32_t frequency,
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si_trx_set_frequency(frequency, deviation);
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si_trx_set_tx_power(power);
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/**
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* Modem tx filter coefficients for APRS
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* 0dB @ 2.2kHz
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* -6dB @ 1.2kHz (for pre-emphasis)
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* < -30dB from 3.6KHz
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*/
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uint8_t p_si_coeff[] = {0x6, 0x8, 0x1, 0xf2, 0xe4, 0xe7, 0xff, 0x1d, 0x2b};
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si_trx_modem_set_tx_datarate(1600);
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si_trx_modem_set_tx_datarate(1600); /* Filter sampling rate 1600*10 = 16kHz */
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si_trx_modem_tx_filter_coefficients(p_si_coeff);
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/* RTTY from GPIO1 */
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si_trx_modem_set_modulation(SI_MODEM_MOD_DIRECT_MODE_SYNC, // ASYNC
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SI_MODEM_MOD_GPIO_1,
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