Low Power Mode problem

marcl · ‎2008-11-09

Posted on November 10, 2008 at 05:59

marcl · ‎2011-05-17

Posted on May 17, 2011 at 12:50

Hallo everybody,

First of all, my configuration :D

Ride7 version 7.14.0001 with RKit-ARM 1.13.0810 and STM32F103RBT6 daughterboard.

Then, the problem 😉

I tried to use low power modes but I have some problems with this. When I use in my code any __WFI or __WFE istruction, after debugging and running the RUN led of RLink turns on but nothing happens - even if in the code I turn on some LEDs before using the __WFI istructions they are not turned on.

In the new IDE version I am using, a message appears:''Lost communication with target.Terminating debug session''.

I used also the PWR examples in STM FWLib, and others from STM website, but they all give me this problem.

What could it be?

Greeting.

marcl · ‎2011-05-17

Posted on May 17, 2011 at 12:50

Nobody can help me?

andreas2 · ‎2011-05-17

Posted on May 17, 2011 at 12:50

You need to set a flag in the debug configuration registers to prevent the low power modes from shutting down the clock and/or power to the debug unit. I don't remember the name of the register, but it's in the debug section of the ref manual.

marcl · ‎2011-05-17

Posted on May 17, 2011 at 12:50

Thanks for the answer, your idea seems to me the right one but...I just tried the DBGMCU_Config function but I have the same problem. Here's the code:

int main(void)

{

RCC_Configuration();

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR,ENABLE);

NVIC_Configuration();

GPIO_Configuration();

/*This should keep debugger connection during Sleep mode*/

DBGMCU_Config(DBGMCU_SLEEP, ENABLE);

/* Config the EXTI to wake up from SLEEP Mode */

EXTI_Configuration();

/* Mode: SLEEP + Entry with WFI*/

__WFI();

while (1){}

}

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOC, &GPIO_InitStructure);

/* Configure PA.0 as input floating (EXTI Line0) */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA, &GPIO_InitStructure);

}

void EXTI_Configuration(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);

EXTI_ClearITPendingBit(EXTI_Line0);

EXTI_InitStructure.EXTI_Line = EXTI_Line0;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

}

void NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);

}

Really can't get why it doesn't work!

[ This message was edited by: marcl on 10-11-2008 10:33 ]