328 lines
11 KiB
C
328 lines
11 KiB
C
/*
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* Copyright (c) 2014-2016 IBM Corporation.
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* Copyright (c) 2017, 2019-2021 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_au915)
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// ================================================================================
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//
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// BEG: AU915 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(SF12, BW125, CR_4_5, 0, 0), // [0]
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MAKERPS(SF11, BW125, CR_4_5, 0, 0), // [1]
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MAKERPS(SF10, BW125, CR_4_5, 0, 0), // [2]
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MAKERPS(SF9 , BW125, CR_4_5, 0, 0), // [3]
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MAKERPS(SF8 , BW125, CR_4_5, 0, 0), // [4]
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MAKERPS(SF7 , BW125, CR_4_5, 0, 0), // [5]
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MAKERPS(SF8 , BW500, CR_4_5, 0, 0), // [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
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};
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bit_t
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LMICau915_validDR(dr_t dr) {
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// use subtract here to avoid overflow
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if (dr >= LENOF_TABLE(_DR2RPS_CRC) - 2)
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return 0;
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return TABLE_GET_U1(_DR2RPS_CRC, dr+1)!=ILLEGAL_RPS;
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}
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static CONST_TABLE(u1_t, maxFrameLens_dwell0)[] = {
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59+5, 59+5, 59+5, 123+5, 250+5, 250+5, 250+5, 0,
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61+5, 137+5, 250+5, 250+5, 250+5, 250+5 };
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static CONST_TABLE(u1_t, maxFrameLens_dwell1)[] = {
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0, 0, 19+5, 61+5, 133+5, 250+5, 250+5, 0,
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61+5, 137+5, 250+5, 250+5, 250+5, 250+5 };
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static bit_t
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LMICau915_getUplinkDwellBit() {
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// if uninitialized, return default.
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if (LMIC.txParam == 0xFF) {
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return AU915_INITIAL_TxParam_UplinkDwellTime;
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}
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return (LMIC.txParam & MCMD_TxParam_TxDWELL_MASK) != 0;
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}
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uint8_t LMICau915_maxFrameLen(uint8_t dr) {
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if (LMICau915_getUplinkDwellBit()) {
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if (dr < LENOF_TABLE(maxFrameLens_dwell0))
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return TABLE_GET_U1(maxFrameLens_dwell0, dr);
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else
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return 0;
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} else {
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if (dr < LENOF_TABLE(maxFrameLens_dwell1))
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return TABLE_GET_U1(maxFrameLens_dwell1, dr);
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else
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return 0;
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}
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}
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// from LoRaWAN 5.8: mapping from txParam to MaxEIRP
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static CONST_TABLE(s1_t, TXMAXEIRP)[16] = {
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8, 10, 12, 13, 14, 16, 18, 20, 21, 24, 26, 27, 29, 30, 33, 36
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};
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static int8_t LMICau915_getMaxEIRP(uint8_t mcmd_txparam) {
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// if uninitialized, return default.
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if (mcmd_txparam == 0xFF)
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return AU915_TX_EIRP_MAX_DBM;
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else
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return TABLE_GET_S1(
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TXMAXEIRP,
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(mcmd_txparam & MCMD_TxParam_MaxEIRP_MASK) >>
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MCMD_TxParam_MaxEIRP_SHIFT
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);
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}
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int8_t LMICau915_pow2dbm(uint8_t mcmd_ladr_p1) {
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if ((mcmd_ladr_p1 & MCMD_LinkADRReq_POW_MASK) == MCMD_LinkADRReq_POW_MASK)
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return -128;
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else {
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return ((s1_t)(LMICau915_getMaxEIRP(LMIC.txParam) - (((mcmd_ladr_p1)&MCMD_LinkADRReq_POW_MASK)<<1)));
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}
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}
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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_SF8C
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us2osticksRound(128 << 0), // ------
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us2osticksRound(128 << 5), // DR_SF12CR
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us2osticksRound(128 << 4), // DR_SF11CR
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us2osticksRound(128 << 3), // DR_SF10CR
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us2osticksRound(128 << 2), // DR_SF9CR
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us2osticksRound(128 << 1), // DR_SF8CR
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us2osticksRound(128 << 0), // DR_SF7CR
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};
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// get ostime for symbols based on datarate. This is not like us915,
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// becuase the times don't match between the upper half and lower half
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// of the table.
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ostime_t LMICau915_dr2hsym(uint8_t dr) {
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return TABLE_GET_OSTIME(DR2HSYM_osticks, dr);
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}
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u4_t LMICau915_convFreq(xref2cu1_t ptr) {
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u4_t freq = (os_rlsbf4(ptr - 1) >> 8) * 100;
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if (freq < AU915_FREQ_MIN || freq > AU915_FREQ_MAX)
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freq = 0;
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return freq;
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}
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///
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/// \brief query number of default channels.
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///
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/// \note
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/// For AU, we have no programmable channels; all channels
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/// are fixed. Return the total channel count.
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///
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u1_t LMIC_queryNumDefaultChannels() {
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return 64 + 8;
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}
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///
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/// \brief LMIC_setupChannel for AU915
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///
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/// \note there are no progammable channels for US915, so this API
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/// always returns FALSE.
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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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LMIC_API_PARAMETER(chidx);
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LMIC_API_PARAMETER(freq);
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LMIC_API_PARAMETER(drmap);
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LMIC_API_PARAMETER(band);
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return 0; // all channels are hardwired.
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}
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bit_t LMIC_disableChannel(u1_t channel) {
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bit_t result = 0;
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if (channel < 72) {
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if (ENABLED_CHANNEL(channel)) {
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result = 1;
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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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return result;
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}
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bit_t LMIC_enableChannel(u1_t channel) {
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bit_t result = 0;
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if (channel < 72) {
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if (!ENABLED_CHANNEL(channel)) {
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result = 1;
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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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return result;
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}
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bit_t 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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bit_t result = 0;
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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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result |= 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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result |= LMIC_enableChannel(64 + band);
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return result;
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}
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bit_t 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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bit_t result = 0;
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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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result |= 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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result |= LMIC_disableChannel(64 + band);
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return result;
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}
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bit_t LMIC_selectSubBand(u1_t band) {
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bit_t result = 0;
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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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result |= LMIC_enableSubBand(b);
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else
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result |= LMIC_disableSubBand(b);
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}
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return result;
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}
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void LMICau915_updateTx(ostime_t txbeg) {
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u1_t chnl = LMIC.txChnl;
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LMIC.txpow = LMICau915_getMaxEIRP(LMIC.txParam);
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if (chnl < 64) {
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LMIC.freq = AU915_125kHz_UPFBASE + chnl*AU915_125kHz_UPFSTEP;
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} else {
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ASSERT(chnl < 64 + 8);
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LMIC.freq = AU915_500kHz_UPFBASE + (chnl - 64)*AU915_500kHz_UPFSTEP;
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}
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// Update global duty cycle stat and deal with dwell time.
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u4_t dwellDelay;
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u4_t globalDutyDelay;
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dwellDelay = globalDutyDelay = 0;
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if (LMIC.globalDutyRate != 0) {
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ostime_t airtime = calcAirTime(LMIC.rps, LMIC.dataLen);
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globalDutyDelay = txbeg + (airtime << LMIC.globalDutyRate);
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}
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if (LMICau915_getUplinkDwellBit(LMIC.txParam)) {
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dwellDelay = AU915_UPLINK_DWELL_TIME_osticks;
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}
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if (dwellDelay > globalDutyDelay) {
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globalDutyDelay = dwellDelay;
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}
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if (globalDutyDelay != 0) {
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LMIC.globalDutyAvail = txbeg + globalDutyDelay;
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}
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}
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#if !defined(DISABLE_BEACONS)
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void LMICau915_setBcnRxParams(void) {
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LMIC.dataLen = 0;
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LMIC.freq = AU915_500kHz_DNFBASE + LMIC.bcnChnl * AU915_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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// set the Rx1 dndr, rps.
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void LMICau915_setRx1Params(void) {
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u1_t const txdr = LMIC.dndr;
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u1_t candidateDr;
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LMIC.freq = AU915_500kHz_DNFBASE + (LMIC.txChnl & 0x7) * AU915_500kHz_DNFSTEP;
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if ( /* TX datarate */txdr < AU915_DR_SF8C)
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candidateDr = txdr + 8 - LMIC.rx1DrOffset;
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else
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candidateDr = AU915_DR_SF7CR;
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if (candidateDr < LORAWAN_DR8)
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candidateDr = LORAWAN_DR8;
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else if (candidateDr > LORAWAN_DR13)
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candidateDr = LORAWAN_DR13;
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LMIC.dndr = candidateDr;
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LMIC.rps = dndr2rps(LMIC.dndr);
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}
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void LMICau915_initJoinLoop(void) {
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// LMIC.txParam is set to 0xFF by the central code at init time.
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LMICuslike_initJoinLoop();
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// initialize the adrTxPower.
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LMIC.adrTxPow = LMICau915_getMaxEIRP(LMIC.txParam); // dBm
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}
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//
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// END: AU915 related stuff
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//
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// ================================================================================
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#endif
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