Hello ,
I on the DK nRF52840, I wanted to manage the sleep mode and measure the current consumed by the microcontroller.
I started with example uart, I cut the PCB track courting solder bridge SB40 and I soldered a 10 Ω resistor .
the current measured with oscilloscope 0.216A (I measure the voltage between the resistance and i divide by 10 ).
, and once the microcontroller goes to sleep, I measure 0.241A, which means that the microphone does not go into sleep mode . can you help me please .
why it doesn't go to sleep ?
Best regards,/**
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/** @file
* @defgroup uart_example_main main.c
* @{
* @ingroup uart_example
* @brief UART Example Application main file.
*
* This file contains the source code for a sample application using UART.
*
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "app_uart.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "nrf.h"
#include "bsp.h"
#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif
#include "nrf_pwr_mgmt.h"
#define MAX_TEST_DATA_BYTES (15U) /**< max number of test bytes to be used for tx and rx. */
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
#define UART_HWFC APP_UART_FLOW_CONTROL_DISABLED
uint8_t cr;
void uart_deinit(void)
{
app_uart_close();
NRF_UART0->TASKS_STOPTX = 1 ;
NRF_UART0->TASKS_STOPRX = 1 ;
NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Disabled << UART_ENABLE_ENABLE_Pos; ;
*(uint32_t volatile *)0x40002FFC = 0 ;
*(uint32_t volatile *)0x40002FFC ;
*(uint32_t volatile *)0x40002FFC = 1 ;
}
void uart_error_handle(app_uart_evt_t * p_event)
{
if (p_event->evt_type == APP_UART_COMMUNICATION_ERROR)
{
APP_ERROR_HANDLER(p_event->data.error_communication);
}
else if (p_event->evt_type == APP_UART_FIFO_ERROR)
{
APP_ERROR_HANDLER(p_event->data.error_code);
}
else if(p_event->evt_type == APP_UART_DATA_READY)
{
}
else if( p_event->evt_type == APP_UART_TX_EMPTY)
{
if (cr == 'q' || cr == 'Q')
{
printf(" \r\nExit!\r\n");
/* Disable the UART0 peripheral */
uart_deinit();
while (true)
{
/* Going to sleep */
nrf_pwr_mgmt_run();
}
}
}
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
uint32_t err_code;
bsp_board_init(BSP_INIT_LEDS);
const app_uart_comm_params_t comm_params =
{
RX_PIN_NUMBER,
TX_PIN_NUMBER,
RTS_PIN_NUMBER,
CTS_PIN_NUMBER,
UART_HWFC,
false,
#if defined (UART_PRESENT)
NRF_UART_BAUDRATE_115200
#else
NRF_UARTE_BAUDRATE_115200
#endif
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_error_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
printf("\r\nUART example started.\r\n");
while (true)
{
while (app_uart_get(&cr) != NRF_SUCCESS);
while (app_uart_put(cr) != NRF_SUCCESS);
}
}
/** @} */
