Posted on September 27, 2012 at 11:26Hi,
I use the STM32F0 Discovery. I disconnect jump JP2 and connect ammeter. I build a simple program in IAR:
int main()
{
DWORD i;
UINT16 j;
SystemInit();
SystemCoreClockUpdate();
init_hardware();
for(j=0;j<10;j++){
GPIO_SetBits(GPIOC,GPIO_Pin_8);
for(i=0;i<200000;i++);
GPIO_ResetBits(GPIOC,GPIO_Pin_8);
for(i=0;i<200000;i++);
}
PWR_EnterSTANDBYMode();
while(1){
GPIO_SetBits(GPIOC,GPIO_Pin_9);
for(i=0;i<200000;i++);
GPIO_ResetBits(GPIOC,GPIO_Pin_9);
for(i=0;i<200000;i++);
}//while
}
I set the clock :
*=============================================================================
*=============================================================================
* System Clock source | HSI
*-----------------------------------------------------------------------------
* SYSCLK(Hz) | 8000000
*-----------------------------------------------------------------------------
* HCLK(Hz) | 8000000
*-----------------------------------------------------------------------------
* AHB Prescaler | 1
*-----------------------------------------------------------------------------
* APB Prescaler | 1
*-----------------------------------------------------------------------------
* HSE Frequency(Hz) | NA
*----------------------------------------------------------------------------
* PLLMUL | NA
*-----------------------------------------------------------------------------
* PREDIV | NA
*-----------------------------------------------------------------------------
* Flash Latency(WS) | 0
*-----------------------------------------------------------------------------
* Prefetch Buffer | ON
*-----------------------------------------------------------------------------
I compile and download code in the flash , The first part of code
flashes
a led blue 10
times
and
after
it goes to sleep
.
The sleep mode works, in fact the rest of code (after the sleep condition) doesn't run.
After the sleep command, the STM32F0 consumes 5mA; in stand by mode, it consumes 2mA, instead of uA!!!.
