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Merge pull request #15181 from hallard/LoRa_sx1276_LowPower_fix 

Fix LoRa sx1276 Low Power sleep, now 3uA
pull/15192/head
Martin Kojtal 2021-12-08 14:55:52 +00:00 committed by GitHub
parent b129f6ebad ccc34b9134
commit 1c5813b33c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 27 additions and 10 deletions
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37
connectivity/drivers/lora/COMPONENT_SX1276/SX1276_LoRaRadio.cpp
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@ -35,7 +35,8 @@ SPDX-License-Identifier: BSD-3-Clause
#include "sx1276Regs-LoRa.h" #include "sx1276Regs-LoRa.h"
#include <math.h> //rint #include <math.h> //rint
#include <chrono>
using namespace std::chrono_literals;
using namespace rtos; using namespace rtos;
using namespace mbed; using namespace mbed;
@ -210,6 +211,8 @@ SX1276_LoRaRadio::SX1276_LoRaRadio(PinName spi_mosi,
if (tcxo != NC) { if (tcxo != NC) {
_tcxo = 1; _tcxo = 1;
// TCXO startup time
ThisThread::sleep_for(5ms);
} }
#ifdef MBED_CONF_RTOS_PRESENT #ifdef MBED_CONF_RTOS_PRESENT
@ -288,9 +291,9 @@ void SX1276_LoRaRadio::radio_reset()
{ {
_reset_ctl.output(); _reset_ctl.output();
_reset_ctl = 0; _reset_ctl = 0;
ThisThread::sleep_for(2); ThisThread::sleep_for(2ms);
_reset_ctl.input(); _reset_ctl.input();
ThisThread::sleep_for(6); ThisThread::sleep_for(6ms);
} }
/** /**
@ -357,7 +360,7 @@ uint32_t SX1276_LoRaRadio::random(void)
set_operation_mode(RF_OPMODE_RECEIVER); set_operation_mode(RF_OPMODE_RECEIVER);
for (i = 0; i < 32; i++) { for (i = 0; i < 32; i++) {
ThisThread::sleep_for(1); ThisThread::sleep_for(1ms);
// Unfiltered RSSI value reading. Only takes the LSB value // Unfiltered RSSI value reading. Only takes the LSB value
rnd |= ((uint32_t) read_register(REG_LR_RSSIWIDEBAND) & 0x01) << i; rnd |= ((uint32_t) read_register(REG_LR_RSSIWIDEBAND) & 0x01) << i;
} }
@ -805,7 +808,7 @@ void SX1276_LoRaRadio::send(uint8_t *buffer, uint8_t size)
// FIFO operations can not take place in Sleep mode // FIFO operations can not take place in Sleep mode
if ((read_register(REG_OPMODE) & ~RF_OPMODE_MASK) == RF_OPMODE_SLEEP) { if ((read_register(REG_OPMODE) & ~RF_OPMODE_MASK) == RF_OPMODE_SLEEP) {
standby(); standby();
ThisThread::sleep_for(1); ThisThread::sleep_for(1ms);
} }
// write_to_register payload buffer // write_to_register payload buffer
write_fifo(buffer, size); write_fifo(buffer, size);
@ -1025,7 +1028,7 @@ bool SX1276_LoRaRadio::perform_carrier_sense(radio_modems_t modem,
set_operation_mode(RF_OPMODE_RECEIVER); set_operation_mode(RF_OPMODE_RECEIVER);
// hold on a bit, radio turn-around time // hold on a bit, radio turn-around time
ThisThread::sleep_for(1); ThisThread::sleep_for(1ms);
Timer elapsed_time; Timer elapsed_time;
elapsed_time.start(); elapsed_time.start();
@ -1263,13 +1266,27 @@ void SX1276_LoRaRadio::read_fifo(uint8_t *buffer, uint8_t size)
void SX1276_LoRaRadio::set_operation_mode(uint8_t mode) void SX1276_LoRaRadio::set_operation_mode(uint8_t mode)
{ {
if (mode == RF_OPMODE_SLEEP) { if (mode == RF_OPMODE_SLEEP) {
write_to_register(REG_OPMODE, (read_register(REG_OPMODE) & RF_OPMODE_MASK) | mode);
set_low_power_mode(); set_low_power_mode();
/* FIXME taken from set_modem, it reduces the power consumption
*from 300µA to 1.5µA */
write_to_register(REG_DIOMAPPING1, 0x00); // sets DIO0-DI03 in default mode
write_to_register(REG_DIOMAPPING2, 0x30); // bits 4-5 are turned on i.e.,
if (_rf_ctrls.tcxo != NC) {
ThisThread::sleep_for(1ms);
_tcxo = 0;
}
} else { } else {
if (_rf_ctrls.tcxo != NC) {
_tcxo = 1;
// TCXO startup time
ThisThread::sleep_for(5ms);
}
set_low_power_mode(); set_low_power_mode();
write_to_register(REG_OPMODE, (read_register(REG_OPMODE) & RF_OPMODE_MASK) | mode);
set_antenna_switch(mode); set_antenna_switch(mode);
} }
write_to_register(REG_OPMODE, (read_register(REG_OPMODE) & RF_OPMODE_MASK) | mode);
} }
/** /**
@ -1327,14 +1344,14 @@ void SX1276_LoRaRadio::set_sx1276_variant_type()
{ {
if (_rf_ctrls.ant_switch != NC) { if (_rf_ctrls.ant_switch != NC) {
_ant_switch.input(); _ant_switch.input();
ThisThread::sleep_for(1); ThisThread::sleep_for(1ms);
if (_ant_switch == 1) { if (_ant_switch == 1) {
radio_variant = SX1276MB1LAS; radio_variant = SX1276MB1LAS;
} else { } else {
radio_variant = SX1276MB1MAS; radio_variant = SX1276MB1MAS;
} }
_ant_switch.output(); _ant_switch.output();
ThisThread::sleep_for(1); ThisThread::sleep_for(1ms);
} else { } else {
radio_variant = MBED_CONF_SX1276_LORA_DRIVER_RADIO_VARIANT; radio_variant = MBED_CONF_SX1276_LORA_DRIVER_RADIO_VARIANT;
} }
@ -2274,4 +2291,4 @@ void SX1276_LoRaRadio::handle_timeout_irq()
#endif // DEVICE_SPI #endif // DEVICE_SPI
// EOF // EOF