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Investigating a weird high current consumption.

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This commit is contained in:
rbaron 2021-02-19 18:38:53 +01:00
parent fb48ad7da7
commit 5ca930d5da
3 changed files with 39 additions and 19 deletions
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3
code/parasite/platformio.ini
View file

@ -29,4 +29,5 @@ upload_port = /dev/cu.usbmodem14101
monitor_port = /dev/cu.usbmodem14101
; build_flags = -DUSE_LFSYNT
debug_tool = jlink
; build_flags = -DUSE_TINYUSB -DNRF52 -DS140 -DNRF5
; build_flags = -DUSE_TINYUSB -DNRF52 -DS140 -DNRF5
; build_flags = -DCFG_DEBUG=0

52
code/parasite/src/main.cpp
View file

@ -1,3 +1,6 @@
// #define NRF_LOG_BACKEND_UART_ENABLED 0
// #define NRF_LOG_ENABLED 0
#include <Arduino.h>
#include <cstring>
@ -8,12 +11,13 @@
#include "parasite/pwm.h"
// variants/feather_nrf52840_express/variant.cpp
constexpr int kLED1Pin = 17; // P0.28
constexpr int kLED2Pin = 18; // P0.02
constexpr int kPWMPin = 33; // 0.09
constexpr int kSoilAnalogPin = 21; // P0.31, AIN7
constexpr int kBattAnalogPin = 15; // P0.05, AIN3
constexpr int kDischargeEnablePin = 16; // P0.30;
constexpr int kLED1Pin = 17; // P0.28
constexpr int kLED2Pin = 18; // P0.02
constexpr int kPWMPin = 33; // 0.09
constexpr int kSoilAnalogPin = 21; // P0.31, AIN7
constexpr int kBattAnalogPin = 15; // P0.05, AIN3
constexpr int kBattMonitorEnablePin = 19; // P0.03, AIN1
constexpr int kDischargeEnablePin = 16; // P0.30;
constexpr double kPWMFrequency = 500000;
// parasite::SquareWaveGenerator square_wave_generator(kPWMFrequency, kPWMPin);
@ -53,43 +57,55 @@ void timer_cb(TimerHandle_t timer_handle) {
// digitalToggle(kLED1Pin);
digitalWrite(kBattMonitorEnablePin, HIGH);
delay(10);
double battery_voltage = batt_monitor.Read();
digitalWrite(kBattMonitorEnablePin, LOW);
Serial.printf("Batt voltage: %f\n", battery_voltage);
digitalWrite(kDischargeEnablePin, HIGH);
square_wave_generator.Start();
delay(10);
parasite::soil_reading_t soil_reading = soil_monitor.Read(battery_voltage);
Serial.printf("Moisture val: %d, %f%%\n", soil_reading.raw,
100 * soil_reading.parcent);
square_wave_generator.Stop();
digitalWrite(kDischargeEnablePin, LOW);
Serial.printf("Moisture val: %d, %f%%\n", soil_reading.raw,
100 * soil_reading.parcent);
updateAdvertisingData(&advertiser, soil_reading, battery_voltage);
// Keep adversiting for 1 second.
delay(500);
advertiser.Stop();
// TODO(rbaron): what else can we turn off to save battery?
}
void setup() {
Serial.begin(9600);
// pinMode(kLED1Pin, OUTPUT);
pinMode(kDischargeEnablePin, OUTPUT);
// Serial.begin(9600);
// // pinMode(kLED1Pin, OUTPUT);
// pinMode(kDischargeEnablePin, OUTPUT);
// pinMode(kBattMonitorEnablePin, OUTPUT);
// digitalWrite(kDischargeEnablePin, HIGH);
// parasite::SquareWaveGenerator square_wave_generator(kPWMFrequency,
// kPWMPin); square_wave_generator.Start();
timer.begin(1000, timer_cb, /*timerID=*/nullptr, /*repeating=*/true);
timer.start();
// timer.begin(1000, timer_cb, /*timerID=*/nullptr, /*repeating=*/true);
// timer.start();
// Suspend the loop task. Under the hood this is a freeRTOS task set up
// by the Adafruit_nNRF52_Arduino package.
suspendLoop();
// suspendLoop();
// NRF_UART0->TASKS_STOPTX = 1;
// NRF_UART0->TASKS_STOPRX = 1;
// NRF_UART0->ENABLE = 0;
// NRF_SPI0->ENABLE = 0;
// __disable_irq()
// sd_power_system_off();
// NRF_POWER->SYSTEMOFF = POWER_SYSTEMOFF_SYSTEMOFF_Enter;
}
void loop() {}
void loop() {
Serial.printf("Ok");
delay(1000);
}

3
resources.md
View file

@ -278,6 +278,9 @@ Questions:
* FPU (floating point interrupts) also might trigger the interrupt. Important thread from [nordic](https://devzone.nordicsemi.com/f/nordic-q-a/23242/single-float-division-causing-7x-higher-current-draw)
* Doesn't work with C++?? [devzone](https://devzone.nordicsemi.com/f/nordic-q-a/13465/nvic-registered-interrupt-doesn-t-work)
* Good tips on how to save energy (for nrf51, but the same ideas apply) [link](https://devzone.nordicsemi.com/f/nordic-q-a/1657/how-to-minimize-current-consumption-for-ble-application-on-nrf51822#5187)
## Deep Sleep with SoftwareTimer
This is a FreeRTOS scheduled task. It seems to work, but by default it wasn't. I had to increase the FreeRTOS timer stack size, as hinted in [this GitHub issue](https://github.com/adafruit/Adafruit_nRF52_Arduino/issues/188)], in ~/.platformio/packages/framework-arduinoadafruitnrf52/cores/nRF5/freertos/config/FreeRTOSConfig.h.