Hello all
I ajust trying to measure the curreent of my circuit in standby mode
i wrote a small code that wake up the mcu from RTC alarm A ad then go in standbye mode
when i download the program the program works ok , it wakeup every 10 seconds from RTC alarm and go stanby mode but the current in standbye mode is high about 1,5mA
but if switch the battery off and again ON ; then the software works ok and wakes the MCU evert 10 seconds from RTC but now the standby in 4uA which is ok .
I dont understand what is wrong the circuit is just simple one MCU + LDO ( 4uA) .
here is the code ,
thank you inadvanced
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
// MX_USB_OTG_FS_USB_Init();
/* USER CODE BEGIN 2 */
rtc_alarm_test();
if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear Standby flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_SET);
HAL_Delay(5);
//
HAL_Delay(5000);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_RESET);
/* Enable GPIOs clock */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
/* Set all GPIO in analog state to reduce power consumption, */
/* except GPIOC to keep user button interrupt enabled */
/* Note: Debug using ST-Link is not possible during the execution of this */
/* example because communication between ST-link and the device */
/* under test is done through UART. All GPIO pins are disabled (set */
/* to analog input mode) including UART I/O pins. */
GPIO_InitStructure.Pin = GPIO_PIN_All;
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOF, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
/* Disable GPIOs clock */
__HAL_RCC_GPIOA_CLK_DISABLE();
__HAL_RCC_GPIOB_CLK_DISABLE();
__HAL_RCC_GPIOC_CLK_DISABLE();
__HAL_RCC_GPIOD_CLK_DISABLE();
__HAL_RCC_GPIOE_CLK_DISABLE();
__HAL_RCC_GPIOF_CLK_DISABLE();
__HAL_RCC_GPIOG_CLK_DISABLE();
__HAL_RCC_GPIOH_CLK_DISABLE();
__HAL_RCC_PWR_CLK_ENABLE() ;
/* wait 100 ms */
HAL_Delay(100);
HAL_PWR_EnterSTANDBYMode();
while(1);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
