283 lines
10 KiB
C
283 lines
10 KiB
C
/*
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* Copyright (c) 2014-2016 IBM Corporation.
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* Copyright (c) 2017, 2019 MCCI Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the <organization> nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define LMIC_DR_LEGACY 0
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#include "lmic_bandplan.h"
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#if defined(CFG_eu868)
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// ================================================================================
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//
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// BEG: EU868 related stuff
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//
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CONST_TABLE(u1_t, _DR2RPS_CRC)[] = {
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ILLEGAL_RPS,
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(u1_t)MAKERPS(SF12, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF11, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF10, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF9, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF8, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF7, BW125, CR_4_5, 0, 0),
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(u1_t)MAKERPS(SF7, BW250, CR_4_5, 0, 0),
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(u1_t)MAKERPS(FSK, BW125, CR_4_5, 0, 0),
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ILLEGAL_RPS
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};
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static CONST_TABLE(u1_t, maxFrameLens)[] = {
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59+5, 59+5, 59+5, 123+5, 250+5, 250+5, 250+5, 250+5
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};
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uint8_t LMICeu868_maxFrameLen(uint8_t dr) {
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if (dr < LENOF_TABLE(maxFrameLens))
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return TABLE_GET_U1(maxFrameLens, dr);
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else
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return 0;
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}
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static CONST_TABLE(s1_t, TXPOWLEVELS)[] = {
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16, 14, 12, 10, 8, 6, 4, 2
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};
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int8_t LMICeu868_pow2dBm(uint8_t mcmd_ladr_p1) {
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uint8_t const pindex = (mcmd_ladr_p1&MCMD_LinkADRReq_POW_MASK)>>MCMD_LinkADRReq_POW_SHIFT;
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if (pindex < LENOF_TABLE(TXPOWLEVELS)) {
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return TABLE_GET_S1(TXPOWLEVELS, pindex);
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} else {
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return -128;
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}
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}
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// only used in this module, but used by variant macro dr2hsym().
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static CONST_TABLE(ostime_t, DR2HSYM_osticks)[] = {
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us2osticksRound(128 << 7), // DR_SF12
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us2osticksRound(128 << 6), // DR_SF11
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us2osticksRound(128 << 5), // DR_SF10
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us2osticksRound(128 << 4), // DR_SF9
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us2osticksRound(128 << 3), // DR_SF8
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us2osticksRound(128 << 2), // DR_SF7
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us2osticksRound(128 << 1), // DR_SF7B
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us2osticksRound(80) // FSK -- time for 1/2 byte (unused by LMIC)
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};
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ostime_t LMICeu868_dr2hsym(uint8_t dr) {
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return TABLE_GET_OSTIME(DR2HSYM_osticks, dr);
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}
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enum { NUM_DEFAULT_CHANNELS = 3 };
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static CONST_TABLE(u4_t, iniChannelFreq)[6] = {
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// Join frequencies and duty cycle limit (0.1%)
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EU868_F1 | BAND_MILLI, EU868_F2 | BAND_MILLI, EU868_F3 | BAND_MILLI,
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// Default operational frequencies and duty cycle limit (1%)
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EU868_F1 | BAND_CENTI, EU868_F2 | BAND_CENTI, EU868_F3 | BAND_CENTI,
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};
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void LMICeu868_initDefaultChannels(bit_t join) {
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os_clearMem(&LMIC.channelFreq, sizeof(LMIC.channelFreq));
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#if !defined(DISABLE_MCMD_DlChannelReq)
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os_clearMem(&LMIC.channelDlFreq, sizeof(LMIC.channelDlFreq));
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#endif // !DISABLE_MCMD_DlChannelReq
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os_clearMem(&LMIC.channelDrMap, sizeof(LMIC.channelDrMap));
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os_clearMem(&LMIC.bands, sizeof(LMIC.bands));
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LMIC.channelMap = (1 << NUM_DEFAULT_CHANNELS) - 1;
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u1_t su = join ? 0 : NUM_DEFAULT_CHANNELS;
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for (u1_t fu = 0; fu<NUM_DEFAULT_CHANNELS; fu++, su++) {
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LMIC.channelFreq[fu] = TABLE_GET_U4(iniChannelFreq, su);
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// TODO(tmm@mcci.com): don't use EU DR directly, use something from the LMIC context or a static const
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LMIC.channelDrMap[fu] = DR_RANGE_MAP(EU868_DR_SF12, EU868_DR_SF7);
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}
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(void) LMIC_setupBand(BAND_MILLI, 14 /* dBm */, 1000 /* 0.1% */);
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(void) LMIC_setupBand(BAND_CENTI, 14 /* dBm */, 100 /* 1% */);
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(void) LMIC_setupBand(BAND_DECI, 27 /* dBm */, 10 /* 10% */);
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}
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bit_t LMIC_setupBand(u1_t bandidx, s1_t txpow, u2_t txcap) {
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if (bandidx > BAND_AUX) return 0;
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//band_t* b = &LMIC.bands[bandidx];
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xref2band_t b = &LMIC.bands[bandidx];
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b->txpow = txpow;
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b->txcap = txcap;
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b->avail = os_getTime();
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b->lastchnl = os_getRndU1() % MAX_CHANNELS;
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return 1;
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}
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// this table is from highest to lowest
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static CONST_TABLE(u4_t, bandAssignments)[] = {
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870000000 /* .. and above */ | BAND_MILLI,
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869700000 /* .. 869700000 */ | BAND_CENTI,
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869650000 /* .. 869700000 */ | BAND_MILLI,
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869400000 /* .. 869650000 */ | BAND_DECI,
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868600000 /* .. 869640000 */ | BAND_MILLI,
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865000000 /* .. 868400000 */ | BAND_CENTI,
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};
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bit_t LMIC_setupChannel(u1_t chidx, u4_t freq, u2_t drmap, s1_t band) {
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// zero the band bits in freq, just in case.
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freq &= ~3;
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if (chidx < NUM_DEFAULT_CHANNELS) {
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// can't disable a default channel.
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if (freq == 0)
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return 0;
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// can't change a default channel.
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else if (freq != (LMIC.channelFreq[chidx] & ~3))
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return 0;
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}
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bit_t fEnable = (freq != 0);
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if (chidx >= MAX_CHANNELS)
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return 0;
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if (band == -1) {
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for (u1_t i = 0; i < LENOF_TABLE(bandAssignments); ++i) {
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const u4_t thisFreqBand = TABLE_GET_U4(bandAssignments, i);
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const u4_t thisFreq = thisFreqBand & ~3;
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if (freq >= thisFreq) {
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band = ((u1_t)thisFreqBand & 3);
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break;
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}
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}
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// if we didn't identify a frequency, it's millis.
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if (band == -1) {
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band = BAND_MILLI;
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}
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}
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if ((u1_t)band > BAND_AUX)
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return 0;
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freq |= band;
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LMIC.channelFreq[chidx] = freq;
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LMIC.channelDrMap[chidx] = drmap == 0 ? DR_RANGE_MAP(EU868_DR_SF12, EU868_DR_SF7) : drmap;
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if (fEnable)
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LMIC.channelMap |= 1 << chidx; // enabled right away
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else
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LMIC.channelMap &= ~(1 << chidx);
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return 1;
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}
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u4_t LMICeu868_convFreq(xref2cu1_t ptr) {
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u4_t freq = (os_rlsbf4(ptr - 1) >> 8) * 100;
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if (freq < EU868_FREQ_MIN || freq > EU868_FREQ_MAX)
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freq = 0;
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return freq;
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}
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ostime_t LMICeu868_nextJoinTime(ostime_t time) {
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// is the avail time in the future?
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if ((s4_t) (time - LMIC.bands[BAND_MILLI].avail) < 0)
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// yes: then wait until then.
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time = LMIC.bands[BAND_MILLI].avail;
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return time;
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}
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ostime_t LMICeu868_nextTx(ostime_t now) {
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u1_t bmap = 0xF;
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do {
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ostime_t mintime = now + /*8h*/sec2osticks(28800);
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u1_t band = 0;
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for (u1_t bi = 0; bi<4; bi++) {
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if ((bmap & (1 << bi)) && mintime - LMIC.bands[bi].avail > 0)
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mintime = LMIC.bands[band = bi].avail;
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}
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// Find next channel in given band
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u1_t chnl = LMIC.bands[band].lastchnl;
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for (u1_t ci = 0; ci<MAX_CHANNELS; ci++) {
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if ((chnl = (chnl + 1)) >= MAX_CHANNELS)
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chnl -= MAX_CHANNELS;
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if ((LMIC.channelMap & (1 << chnl)) != 0 && // channel enabled
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(LMIC.channelDrMap[chnl] & (1 << (LMIC.datarate & 0xF))) != 0 &&
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band == (LMIC.channelFreq[chnl] & 0x3)) { // in selected band
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LMIC.txChnl = LMIC.bands[band].lastchnl = chnl;
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return mintime;
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}
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}
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if ((bmap &= ~(1 << band)) == 0) {
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// No feasible channel found!
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return mintime;
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}
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} while (1);
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}
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#if !defined(DISABLE_BEACONS)
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void LMICeu868_setBcnRxParams(void) {
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LMIC.dataLen = 0;
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LMIC.freq = LMIC.channelFreq[LMIC.bcnChnl] & ~(u4_t)3;
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LMIC.rps = setIh(setNocrc(dndr2rps((dr_t)DR_BCN), 1), LEN_BCN);
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}
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#endif // !DISABLE_BEACONS
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#if !defined(DISABLE_JOIN)
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ostime_t LMICeu868_nextJoinState(void) {
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return LMICeulike_nextJoinState(NUM_DEFAULT_CHANNELS);
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}
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#endif // !DISABLE_JOIN
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// set the Rx1 dndr, rps.
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void LMICeu868_setRx1Params(void) {
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u1_t const txdr = LMIC.dndr;
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s1_t drOffset;
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s1_t candidateDr;
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LMICeulike_setRx1Freq();
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if ( LMIC.rx1DrOffset <= 5)
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drOffset = (s1_t) LMIC.rx1DrOffset;
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else
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// make a reasonable assumption for unspecified value.
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drOffset = 5;
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candidateDr = (s1_t) txdr - drOffset;
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if (candidateDr < LORAWAN_DR0)
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candidateDr = 0;
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else if (candidateDr > LORAWAN_DR7)
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candidateDr = LORAWAN_DR7;
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LMIC.dndr = (u1_t) candidateDr;
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LMIC.rps = dndr2rps(LMIC.dndr);
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}
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void
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LMICeu868_initJoinLoop(void) {
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LMICeulike_initJoinLoop(NUM_DEFAULT_CHANNELS, /* adr dBm */ EU868_TX_EIRP_MAX_DBM);
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}
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//
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// END: EU868 related stuff
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//
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// ================================================================================
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#endif |