Mikhail Isaev 352e6fbd23 Fix overflow at extremely low RSSI ... Some LoRaWAN modem like SX1272 can receive downlink packets with RSSI level less than -127. So "int8_t" is not enough for store all possible RSSI values. For example, SX1272 has sensitivity at -137 dBm. Problem was manifested in the file "SX1272_LoRaRadio.cpp" at SX1272_LoRaRadio::handle_dio0_irq() method. When value of _rf_settings.lora_packet_handler.rssi_value calculated incorrect RSSI will be stored. Example case: Value readen from register REG_LR_PKTSNRVALUE _rf_settings.lora_packet_handler.snr_value equals -47. Value readen from register REG_LR_PKTRSSIVALUE equals 17. RSSI_OFFSET equals "-139", snr equals "-11". For case MODEM_LORA value calculated by formula: _rf_settings.lora_packet_handler.rssi_value = RSSI_OFFSET + rssi + (rssi >> 4) + snr; and result value will be "124" because of int8_t overflow so it's not correct value (too high). Correct value must be: -139 + 17 + (1) + (-11) = -132. Another motivation: at all other places int16_t type used to store RSSI value.		2021-11-24 21:56:42 +03:00
..
include/lorawan	Fix overflow at extremely low RSSI	2021-11-24 21:56:42 +03:00
lorastack	Lora: Clear callback ID when timer callback is executed.	2021-03-11 21:00:43 +00:00
source	Moving headers and sources to their respective separate directories based on new component structure	2020-08-12 11:06:37 +01:00
system	LoRaWANTimer: add new line at the end of the file	2021-03-12 08:24:16 +00:00
tests	Unit tests: Remove redundant CMake target mbed-headers-base	2021-08-02 17:42:43 +01:00
CMakeLists.txt	CMake: Add option to enable greentea tests	2021-08-10 16:35:11 +01:00
FSB_Usage.txt	Mbed OS will soon be changing directory structure to the below:	2020-08-12 11:06:36 +01:00
LICENSE	Mbed OS will soon be changing directory structure to the below:	2020-08-12 11:06:36 +01:00
mbed_lib.json	Lora drivers: explicit lib requirement	2021-09-10 09:07:15 +02:00