Example description
BitBand
Example Description
This example shows how to use CortexM3 Bit-Band access to perform atomic
read-modify-write and read operations on a varaible in SRAM.
Directory contents
- CortexM3/BitBand/stm32f10x_conf.h Library Configuration file
- CortexM3/BitBand/stm32f10x_it.c Interrupt handlers
- CortexM3/BitBand/stm32f10x_it.h Header for stm32f10x_it.c
- CortexM3/BitBand/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.
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 :
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- Edit stm32f10x.h file to select the device you are working on.
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
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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Mode Privilege
Example Description
This example shows how to modify CortexM3 Thread mode privilege access and stack.
CortexM3 Thread mode is entered on Reset, and can be entered as a result of an
exception return.
The associated program is used to:
1. Switch the Thread mode stack from Main stack to Process stack
2. Switch the Thread mode from Privileged to Unprivileged
3. Switch the Thread mode from Unprivileged back to Privileged
To monitor the stack used and the privileged or unprivileged access level of code
in Thread mode, a set of variables is available within the program. It is also
possible to use the 'Cortex register' window of the debugger.
Directory contents
- CortexM3/Mode_Privilege/stm32f10x_conf.h Library Configuration file
- CortexM3/Mode_Privilege/stm32f10x_it.c Interrupt handlers
- CortexM3/Mode_Privilege/stm32f10x_it.h Header for stm32f10x_it.c
- CortexM3/Mode_Privilege/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.
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 :
- system_stm32f10x.c (under Libraries\CMSIS\Core\CM3)
- core_cm3.c (under Libraries\CMSIS\Core\CM3)
- Edit stm32f10x.h file to select the device you are working on.
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
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.