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Use mcci-catena/arduino-lmic as the base library
This commit is contained in:
Manuel Bleichenbacher
209
src/lmic/lmic_us915.c
Executable file
209
src/lmic/lmic_us915.c
Executable file
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/*
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* Copyright (c) 2014-2016 IBM Corporation.
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* Copyright (c) 2017 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_us915)
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// ================================================================================
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//
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// BEG: US915 related stuff
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//
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CONST_TABLE(u1_t, _DR2RPS_CRC)[] = {
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ILLEGAL_RPS, // [-1]
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MAKERPS(SF10, BW125, CR_4_5, 0, 0), // [0]
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MAKERPS(SF9 , BW125, CR_4_5, 0, 0), // [1]
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MAKERPS(SF8 , BW125, CR_4_5, 0, 0), // [2]
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MAKERPS(SF7 , BW125, CR_4_5, 0, 0), // [3]
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MAKERPS(SF8 , BW500, CR_4_5, 0, 0), // [4]
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ILLEGAL_RPS , // [5]
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ILLEGAL_RPS , // [6]
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ILLEGAL_RPS , // [7]
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MAKERPS(SF12, BW500, CR_4_5, 0, 0), // [8]
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MAKERPS(SF11, BW500, CR_4_5, 0, 0), // [9]
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MAKERPS(SF10, BW500, CR_4_5, 0, 0), // [10]
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MAKERPS(SF9 , BW500, CR_4_5, 0, 0), // [11]
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MAKERPS(SF8 , BW500, CR_4_5, 0, 0), // [12]
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MAKERPS(SF7 , BW500, CR_4_5, 0, 0), // [13]
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ILLEGAL_RPS // [14]
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};
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static CONST_TABLE(u1_t, maxFrameLens)[] = { 24,66,142,255,255,255,255,255, 66,142 };
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uint8_t LMICus915_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 0xFF;
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}
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static CONST_TABLE(ostime_t, DR2HSYM_osticks)[] = {
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us2osticksRound(128 << 5), // DR_SF10 DR_SF12CR
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us2osticksRound(128 << 4), // DR_SF9 DR_SF11CR
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us2osticksRound(128 << 3), // DR_SF8 DR_SF10CR
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us2osticksRound(128 << 2), // DR_SF7 DR_SF9CR
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us2osticksRound(128 << 1), // DR_SF8C DR_SF8CR
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us2osticksRound(128 << 0) // ------ DR_SF7CR
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};
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ostime_t LMICus915_dr2hsym(uint8_t dr) {
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return TABLE_GET_OSTIME(DR2HSYM_osticks, (dr) & 7); // map DR_SFnCR -> 0-6
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}
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u4_t LMICus915_convFreq(xref2cu1_t ptr) {
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u4_t freq = (os_rlsbf4(ptr - 1) >> 8) * 100;
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if (freq < US915_FREQ_MIN || freq > US915_FREQ_MAX)
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freq = 0;
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return freq;
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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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if (chidx < 72 || chidx >= 72 + MAX_XCHANNELS)
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return 0; // channels 0..71 are hardwired
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LMIC.xchFreq[chidx - 72] = freq;
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// TODO(tmm@mcci.com): don't use US SF directly, use something from the LMIC context or a static const
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LMIC.xchDrMap[chidx - 72] = drmap == 0 ? DR_RANGE_MAP(US915_DR_SF10, US915_DR_SF8C) : drmap;
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LMIC.channelMap[chidx >> 4] |= (1 << (chidx & 0xF));
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return 1;
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}
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void LMIC_disableChannel(u1_t channel) {
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if (channel < 72 + MAX_XCHANNELS) {
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if (ENABLED_CHANNEL(channel)) {
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if (IS_CHANNEL_125khz(channel))
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LMIC.activeChannels125khz--;
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else if (IS_CHANNEL_500khz(channel))
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LMIC.activeChannels500khz--;
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}
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LMIC.channelMap[channel >> 4] &= ~(1 << (channel & 0xF));
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}
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}
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void LMIC_enableChannel(u1_t channel) {
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if (channel < 72 + MAX_XCHANNELS) {
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if (!ENABLED_CHANNEL(channel)) {
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if (IS_CHANNEL_125khz(channel))
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LMIC.activeChannels125khz++;
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else if (IS_CHANNEL_500khz(channel))
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LMIC.activeChannels500khz++;
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}
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LMIC.channelMap[channel >> 4] |= (1 << (channel & 0xF));
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}
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}
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void LMIC_enableSubBand(u1_t band) {
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ASSERT(band < 8);
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u1_t start = band * 8;
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u1_t end = start + 8;
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// enable all eight 125 kHz channels in this subband
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for (int channel = start; channel < end; ++channel)
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LMIC_enableChannel(channel);
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// there's a single 500 kHz channel associated with
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// each group of 8 125 kHz channels. Enable it, too.
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LMIC_enableChannel(64 + band);
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}
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void LMIC_disableSubBand(u1_t band) {
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ASSERT(band < 8);
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u1_t start = band * 8;
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u1_t end = start + 8;
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// disable all eight 125 kHz channels in this subband
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for (int channel = start; channel < end; ++channel)
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LMIC_disableChannel(channel);
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// there's a single 500 kHz channel associated with
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// each group of 8 125 kHz channels. Disable it, too.
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LMIC_disableChannel(64 + band);
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}
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void LMIC_selectSubBand(u1_t band) {
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ASSERT(band < 8);
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for (int b = 0; b<8; ++b) {
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if (band == b)
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LMIC_enableSubBand(b);
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else
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LMIC_disableSubBand(b);
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}
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}
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void LMICus915_updateTx(ostime_t txbeg) {
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u1_t chnl = LMIC.txChnl;
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if (chnl < 64) {
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LMIC.freq = US915_125kHz_UPFBASE + chnl*US915_125kHz_UPFSTEP;
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if (LMIC.activeChannels125khz >= 50)
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LMIC.txpow = 30;
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else
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LMIC.txpow = 21;
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} else {
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// at 500kHz bandwidth, we're allowed more power.
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LMIC.txpow = 26;
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if (chnl < 64 + 8) {
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LMIC.freq = US915_500kHz_UPFBASE + (chnl - 64)*US915_500kHz_UPFSTEP;
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}
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else {
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ASSERT(chnl < 64 + 8 + MAX_XCHANNELS);
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LMIC.freq = LMIC.xchFreq[chnl - 72];
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}
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}
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// Update global duty cycle stats
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if (LMIC.globalDutyRate != 0) {
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ostime_t airtime = calcAirTime(LMIC.rps, LMIC.dataLen);
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LMIC.globalDutyAvail = txbeg + (airtime << LMIC.globalDutyRate);
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}
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}
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#if !defined(DISABLE_BEACONS)
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void LMICus915_setBcnRxParams(void) {
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LMIC.dataLen = 0;
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LMIC.freq = US915_500kHz_DNFBASE + LMIC.bcnChnl * US915_500kHz_DNFSTEP;
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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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// TODO(tmm@mcci.com): parmeterize for US-like
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void LMICus915_setRx1Params(void) {
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LMIC.freq = US915_500kHz_DNFBASE + (LMIC.txChnl & 0x7) * US915_500kHz_DNFSTEP;
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if( /* TX datarate */LMIC.dndr < US915_DR_SF8C )
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LMIC.dndr += US915_DR_SF10CR - US915_DR_SF10;
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else if( LMIC.dndr == US915_DR_SF8C )
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LMIC.dndr = US915_DR_SF7CR;
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LMIC.rps = dndr2rps(LMIC.dndr);
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}
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//
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// END: US915 related stuff
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//
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// ================================================================================
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#endif
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