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Allow advanced users to set arbitrary spreadfactor/codingrate/bandwidth

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This commit is contained in:
geeksville
2020-08-12 10:42:25 -07:00
parent fce8c16d52
commit d7cf7e2eb4
5 changed files with 51 additions and 41 deletions
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59
src/mesh/RadioLibInterface.cpp
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@@ -1,5 +1,6 @@
#include "RadioLibInterface.h"
#include "MeshTypes.h"
#include "NodeDB.h"
#include "mesh-pb-constants.h"
#include <configuration.h>
#include <pb_decode.h>
@@ -64,29 +65,41 @@ void RadioLibInterface::applyModemConfig()
{
RadioInterface::applyModemConfig();
switch (modemConfig) {
case Bw125Cr45Sf128: ///< Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Default medium range
bw = 125;
cr = 5;
sf = 7;
break;
case Bw500Cr45Sf128: ///< Bw = 500 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Fast+short range
bw = 500;
cr = 5;
sf = 7;
break;
case Bw31_25Cr48Sf512: ///< Bw = 31.25 kHz, Cr = 4/8, Sf = 512chips/symbol, CRC on. Slow+long range
bw = 31.25;
cr = 8;
sf = 9;
break;
case Bw125Cr48Sf4096:
bw = 125;
cr = 8;
sf = 12;
break;
default:
assert(0); // Unknown enum
if (channelSettings.spread_factor == 0) {
switch (channelSettings.modem_config) {
case ChannelSettings_ModemConfig_Bw125Cr45Sf128: ///< Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Default medium
///< range
bw = 125;
cr = 5;
sf = 7;
break;
case ChannelSettings_ModemConfig_Bw500Cr45Sf128: ///< Bw = 500 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Fast+short
///< range
bw = 500;
cr = 5;
sf = 7;
break;
case ChannelSettings_ModemConfig_Bw31_25Cr48Sf512: ///< Bw = 31.25 kHz, Cr = 4/8, Sf = 512chips/symbol, CRC on. Slow+long
///< range
bw = 31.25;
cr = 8;
sf = 9;
break;
case ChannelSettings_ModemConfig_Bw125Cr48Sf4096:
bw = 125;
cr = 8;
sf = 12;
break;
default:
assert(0); // Unknown enum
}
} else {
sf = channelSettings.spread_factor;
cr = channelSettings.coding_rate;
bw = channelSettings.bandwidth;
if (bw == 31) // This parameter is not an integer
bw = 31.25;
}
}