Thank you for the response. I’m currently just trying the RTC low power example, so no communication.
Initially, the sleep duration was 10s. I increased it to a minute but the current consumption remains the same. A screenshot is attached. You can see peaks approximately every minute. The code I’m using can be seen below.
#include "RTC.h"
void setup()
{
Serial.begin(115200);
Serial.println("SparkFun RTC Low-power Alarm Example");
// // Easily set RTC using the system __DATE__ and __TIME__ macros from compiler
// RTC.setToCompilerTime();
// Manually set RTC date and time
rtc.setTime(0, 0, 0, 9, 21, 4, 23); // 9:00:00.000, April 4th, 2023 (hund, ss, mm, hh, dd, mm, yy)
// Set the RTC's alarm
rtc.setAlarm(0, 0, 1, 9, 21, 4); // 9:01:00.000, June 3rd (hund, ss, mm, hh, dd, mm). Note: No year alarm register
rtc.setAlarmMode(6); // Set the RTC alarm to match on minutes rollover
rtc.attachInterrupt(); // Attach RTC alarm interrupt
}
void loop()
{
// Print date and time of RTC alarm trigger
Serial.print("Alarm interrupt: "); printDateTime();
// Enter deep sleep and await RTC alarm interrupt
goToSleep();
}
// Print the RTC's current date and time
void printDateTime()
{
rtc.getTime();
Serial.printf("20%02d-%02d-%02d %02d:%02d:%02d.%03d\n",
rtc.year, rtc.month, rtc.dayOfMonth,
rtc.hour, rtc.minute, rtc.seconds, rtc.hundredths);
Serial.println();
}
// Power down gracefully
void goToSleep()
{
// Disable UART
Serial.end();
// Disable ADC
powerControlADC(false);
// Force the peripherals off
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_MAX);
/*am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_IOM1);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_IOM2);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_IOM3);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_IOM4);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_IOM5);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_ADC);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_UART0);
am_hal_pwrctrl_periph_disable(AM_HAL_PWRCTRL_PERIPH_UART1);*/
// Disable all pads (except UART TX/RX)
for (int x = 0 ; x < 48 ; x++)
am_hal_gpio_pinconfig(x, g_AM_HAL_GPIO_DISABLE);
//Power down CACHE, flashand SRAM
am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_ALL); // Turn off CACHE and flash
am_hal_pwrctrl_memory_deepsleep_retain(AM_HAL_PWRCTRL_MEM_SRAM_32K_DTCM); // Retain all SRAM (0.6 uA)
// Keep the 32kHz clock running for RTC
am_hal_stimer_config(AM_HAL_STIMER_CFG_CLEAR | AM_HAL_STIMER_CFG_FREEZE);
am_hal_stimer_config(AM_HAL_STIMER_XTAL_32KHZ);
am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP); // Sleep forever
// And we're back!
wakeUp();
}
// Power up gracefully
void wakeUp()
{
// Go back to using the main clock
am_hal_stimer_config(AM_HAL_STIMER_CFG_CLEAR | AM_HAL_STIMER_CFG_FREEZE);
am_hal_stimer_config(AM_HAL_STIMER_HFRC_3MHZ);
// Power up SRAM, turn on entire Flash
am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_MAX);
// Go back to using the main clock
am_hal_stimer_config(AM_HAL_STIMER_CFG_CLEAR | AM_HAL_STIMER_CFG_FREEZE);
am_hal_stimer_config(AM_HAL_STIMER_HFRC_3MHZ);
// Renable UART0 pins
am_hal_gpio_pinconfig(48, g_AM_BSP_GPIO_COM_UART_TX);
am_hal_gpio_pinconfig(49, g_AM_BSP_GPIO_COM_UART_RX);
// Renable power to UART0
am_hal_pwrctrl_periph_enable(AM_HAL_PWRCTRL_PERIPH_UART0);
// Enable ADC
initializeADC();
// Enable Serial
Serial.begin(115200);
}
// Interrupt handler for the RTC
extern "C" void am_rtc_isr(void)
{
// Clear the RTC alarm interrupt
rtc.clearInterrupt();
}
I don’t see a difference with/ without the antenna connected.
Does the charging controller add to the current consumption? If so, is there a way to disable it?
