Example description
PWR_STANDBY
Example Description
This example shows how to enters the system to STANDBY mode and wake-up from this
mode using: external RESET, RTC Alarm or WKUP pin.
In the associated software, the system clock is set to 72 MHz, an EXTI line
is configured to generate an interrupt on falling edge and the SysTick is programmed
to generate an interrupt each 250 ms. In the SysTick interrupt handler, the LED1 is
toggled, this is used to indicate whether the MCU is in STANDBY or RUN mode.
When a falling edge is detected on the EXTI line an interrupt is generated. In the
EXTI handler routine the RTC is configured to generate an Alarm event in 3 second
then the system enters STANDBY mode causing the LED1 to stop toggling.
A rising edge on WKUP pin or an external RESET will wake-up the system from
STANDBY. If within 3 second neither rising edge on WKUP pin nor external RESET
are generated, the RTC Alarm will wake-up the system.
After wake-up from STANDBY mode, program execution restarts in the same way as after
a RESET, the LED1 restarts toggling, LED2 is turned on and the RTC configuration
(clock source, enable, prescaler,...) is kept.
As result there is no need to configure the RTC.
Two leds LED1 and LED2 are used to monitor the system state as following:
- LED1 toggling: system in RUN mode
- LED1 off / LED2 off: system in STANDBY mode
- LED2 on: system resumed from STANDBY mode
Directory contents
- PWR/STANDBY/stm32f10x_conf.h Library Configuration file
- PWR/STANDBY/stm32f10x_it.c Interrupt handlers
- PWR/STANDBY/stm32f10x_it.h Header for stm32f10x_it.c
- PWR/STANDBY/main.c Main program
Hardware and Software environment
- This example runs on STM32F10x Connectivity line, High-Density, Medium-Density
and Low-Density Devices.
- This example has been tested with STMicroelectronics STM3210C-EVAL (STM32F10x
Connectivity line), STM3210E-EVAL (STM32F10x High-Density) and STM3210B-EVAL
(STM32F10x Medium-Density) evaluation boards and can be easily tailored to
any other supported device and development board.
To select the STMicroelectronics evaluation board used to run the example,
uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL)
- STM3210C-EVAL Set-up
- Use LED1 and LED2 connected respectively to PD.07 and PD.13 pins
- Use the Key push-button connected to pin PB.09 (EXTI Line9).
- Use the Wakeup push-button connected to WKUP(PA.00) pin, make sure
that jumper JP14 is in position 2-3.
- STM3210E-EVAL Set-up
- Use LED1 and LED2 connected respectively to PF.06 and PF.07 pins
- Use the Key push-button connected to pin PG.08 (EXTI Line8).
- Use the Wakeup push-button connected to WKUP(PA.00) pin
@note the jumper JP4 must be not fit to be able to use the Wakeup push-button
- STM3210B-EVAL Set-up
- Use LED1 and LED2 connected respectively to PC.06 and PC.07 pins
- Use the Key push-button connected to pin PB.09 (EXTI Line9).
- Use the Wakeup push-button connected to WKUP(PA.00) pin
note For power consumption measurement in STANDBY mode, you have to replace
jumper JP9 in the STM3210B-EVAL board, JP12 in the STM3210E-EVAL or
JP23 (position 1-2) in the STM3210C-EVAL board by an ampermeter.
How to use it ?
In order to make the program work, you must do the following :
- Create a project and setup all project configuration
- Add the required Library files:
- stm32f10x_rcc.c
- stm32f10x_gpio.c
- stm32f10x_rtc.c
- stm32f10x_pwr.c
- stm32f10x_bkp.c
- stm32f10x_exti.c
- misc.c
- stm32f10x_usart.c
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- stm32_eval.c (under Utilities\STM32_EVAL)
- Edit stm32f10x.h file to select the device you are working on.
- Edit stm32_eval.h file to select the evaluation board you will use.
Tip: You can tailor the provided project template to run this example, for
more details please refer to "stm32f10x_stdperiph_lib_um.chm" user
manual; select "Peripheral Examples" then follow the instructions
provided in "How to proceed" section.
- Link all compiled files and load your image into target memory
- Run the example in standalone mode (without debugger connection)
note
- Low-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 16 and 32 Kbytes.
- Medium-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 32 and 128 Kbytes.
- High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
- Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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PWR_STOP
Example Description
This example shows how to enter the system to STOP mode and wake-up using EXTI
Line interrupts. The EXTI Line sources are PB.09/PG.08 and RTC Alarm.
The EXTI line9/8 is configured to generate interrupt on falling edge.
The EXTI line17(RTC Alarm) is configured to generate interrupt on rising edge and
the RTC time base is set to 1 second using the external low speed oscillator(LSE).
The system clock is set to 72 MHz using the external high speed oscillator(HSE).
The system enters and exits STOP mode as following:
After 2 second from system start-up, the RTC is configured to generate an Alarm
event in 3 second then the system enters STOP mode. To wake-up from STOP mode you
have to apply a rising edge on EXTI line9/8, otherwise the RTC Alarm will wake-up
the system within 3 second. After exit from STOP the system clock is reconfigured
to its previous state (as HSE and PLL are disabled in STOP mode).
Then after a delay the system will enter again in STOP mode and exit in the way
described above. This behavior is repeated in an infinite loop.
Three leds LED1, LED2 and LED3 are used to monitor the system state as following:
- LED1 on: system in RUN mode
- LED1 off: system in STOP mode
- LED2 is toggled if EXTI Line9/8 is used to exit from STOP
- LED3 is toggled if EXTI line17(RTC Alarm) is used to exit from STOP
Directory contents
- PWR/STOP/stm32f10x_conf.h Library Configuration file
- PWR/STOP/stm32f10x_it.c Interrupt handlers
- PWR/STOP/stm32f10x_it.h Header for stm32f10x_it.c
- PWR/STOP/main.c Main program
Hardware and Software environment
- This example runs on STM32F10x Connectivity line, High-Density, Medium-Density
and Low-Density Devices.
- This example has been tested with STMicroelectronics STM3210C-EVAL (STM32F10x
Connectivity line), STM3210E-EVAL (STM32F10x High-Density) and STM3210B-EVAL
(STM32F10x Medium-Density) evaluation boards and can be easily tailored to
any other supported device and development board.
To select the STMicroelectronics evaluation board used to run the example,
uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL)
- STM3210C-EVAL Set-up
- Use LED1, LED2 and LED3 leds connected respectively to PD.07, PD.13 and PF.03 pins
- Use the Key push-button connected to pin PB.09 (EXTI Line9).
- STM3210E-EVAL Set-up
- Use LED1, LED2 and LED3 leds connected respectively to PF.06, PF0.7 and PF.08 pins
- Use the Key push-button connected to pin PG.08 (EXTI Line8).
- STM3210B-EVAL Set-up
- Use LED1, LED2 and LED3 leds connected respectively to PC.06, PC.07 and PC.08 pins
- Use the Key push-button connected to pin PB.09 (EXTI Line9).
note For power consumption measurement in STOP mode you have to:
- Modify the example to configure all unused GPIO port pins in Analog Input mode
(floating input trigger OFF). Refer to GPIO\IOToggle example for more details.
- Replace jumper JP9 in the STM3210B-EVAL board, JP12 in the STM3210E-EVAL or
JP23 (position 1-2) in the STM3210C-EVAL board by an ampermeter.
How to use it ?
In order to make the program work, you must do the following :
- Create a project and setup all project configuration
- Add the required Library files :
- stm32f10x_rcc.c
- stm32f10x_gpio.c
- stm32f10x_rtc.c
- stm32f10x_pwr.c
- stm32f10x_bkp.c
- stm32f10x_exti.c
- misc.c
- stm32f10x_usart.c
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- stm32_eval.c (under Utilities\STM32_EVAL)
- Edit stm32f10x.h file to select the device you are working on.
- Edit stm32_eval.h file to select the evaluation board you will use.
Tip: You can tailor the provided project template to run this example, for
more details please refer to "stm32f10x_stdperiph_lib_um.chm" user
manual; select "Peripheral Examples" then follow the instructions
provided in "How to proceed" section.
- Link all compiled files and load your image into target memory
- Run the example in standalone mode (without debugger connection)
note
- Low-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 16 and 32 Kbytes.
- Medium-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 32 and 128 Kbytes.
- High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
- Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.