Thak you @FilipKremen.
I understand what the example code you provided does. But that's not what I want to do.
I want the microcontroller to go to sleep for a certain amount of time (a few dozen minutes) after performing certain operations (acquisition of quantities, updating the EddystoneTLM_InitStruct structure for transmission with the Eddystone TLM protocol). To put the microcontroller to sleep, I use the following sequence:
HAL_LPTIM_Counter_Start_IT(&hlptim1, hlptim_prescaler);
HAL_SuspendTick();
HAL_NVIC_DisableIRQ(RTC_WKUP_IRQn);
HAL_NVIC_DisableIRQ(IPCC_C1_RX_IRQn);
HAL_NVIC_DisableIRQ(IPCC_C1_TX_IRQn);
HAL_NVIC_DisableIRQ(HSEM_IRQn);
HAL_PWREx_EnterSTOP2Mode(PWR_SLEEPENTRY_WFI);
Upon waking up:
HAL_LPTIM_Counter_Stop_IT(&hlptim1);
HAL_NVIC_EnableIRQ(IPCC_C1_RX_IRQn);
HAL_NVIC_EnableIRQ(IPCC_C1_TX_IRQn);
HAL_NVIC_EnableIRQ(HSEM_IRQn);
HAL_InitTick(TICK_INT_PRIORITY);
HAL_ResumeTick();
Everything works correctly: data transmission, the microcontroller in sleep, and waking up.
The problem is that even when the microcontroller is in sleep, I can still detect some transmission activity from my device using the sniffer (I haven't been able to identify what type of transmission it is).
This is a big problem because I'm consuming power (due to this activity) even when the microcontroller is asleep. Apparently, part of the firmware (stack) residing on CPU2 continues to send BLE packets. How can I stop this activity?
