Posted on May 30, 2013 at 16:21Hi,
Stm32l1 consumes much current than I expected. In standby mode, I measure 6uA consumption for my board but when I put it in stop mode it consumes 480uA. It should be around 10uA.
The configuration is;
USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
USART_Cmd(USART2, DISABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
USART_Cmd(USART3, DISABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, DISABLE);
ADC_Cmd(ADC1, DISABLE);
DAC_Cmd(DAC_Channel_1,DISABLE);
DAC_Cmd(DAC_Channel_2,DISABLE);
/* Disable PVD */
PWR_PVDCmd(DISABLE);
/* Enable Ultra low power mode */
PWR_UltraLowPowerCmd(ENABLE);
RCC->AHBENR = 0x05;
RCC->AHBLPENR = 0x05;
RCC->APB1ENR = RCC_APB1ENR_PWREN;
RCC->APB2ENR = 0;
/* To stop the sys tick for avoid IT */
SysTick->CTRL = 0;
SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk; // systick IRQ off
PWR_ClearFlag(PWR_FLAG_WU);
/* RCC system reset */
RCC_DeInit();
/* Flash no latency*/
FLASH_SetLatency(FLASH_Latency_0);
/* Disable Prefetch Buffer */
FLASH_PrefetchBufferCmd(DISABLE);
/* Disable 64-bit access */
FLASH_ReadAccess64Cmd(DISABLE);
/* Disable FLASH during SLeep */
FLASH_SLEEPPowerDownCmd(ENABLE);
/* Enable the PWR APB1 Clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Select the Voltage Range 3 (1.2V) */
PWR_VoltageScalingConfig(PWR_VoltageScaling_Range3);
/* Wait Until the Voltage Regulator is ready */
while (PWR_GetFlagStatus(PWR_FLAG_VOS) != RESET);
/* Configure the MSI frequency */
RCC_MSIRangeConfig(RCC_ICSCR_MSIRANGE_0);
/* Select MSI as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_MSI);
/* Wait until MSI is used as system clock source */
while (RCC_GetSYSCLKSource() != 0x00);
/* Disable HSI clock */
RCC_HSICmd(DISABLE);
/* Disable HSE clock */
RCC_HSEConfig(RCC_HSE_OFF);
/* Disable LSI clock */
RCC_LSICmd(DISABLE);
/* Configure all GPIO as analog to reduce current consumption on non used IOs */
/* Enable GPIOs clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC |
RCC_AHBPeriph_GPIOD | RCC_AHBPeriph_GPIOE | RCC_AHBPeriph_GPIOH |
RCC_AHBPeriph_GPIOF | RCC_AHBPeriph_GPIOG, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_400KHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_Init(GPIOH, &GPIO_InitStructure);
GPIO_Init(GPIOG, &GPIO_InitStructure);
GPIO_Init(GPIOF, &GPIO_InitStructure);
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Disable GPIOs clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC |
RCC_AHBPeriph_GPIOD | RCC_AHBPeriph_GPIOE | RCC_AHBPeriph_GPIOH |
RCC_AHBPeriph_GPIOF | RCC_AHBPeriph_GPIOG, DISABLE);
/* Enter Stop Mode */
PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
It does not matter waking up from stop mode, I just want to decrease my current consumption to 10uA. What is wrong with my code? Any suggestion?
#stm32-stm32l151
