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diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/GPIO/IOToggle/readme.txt b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/GPIO/IOToggle/readme.txt new file mode 100644 index 0000000..bdaa5d7 --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/GPIO/IOToggle/readme.txt @@ -0,0 +1,87 @@ +/** + @page GPIO_IOToggle GPIO IO Toggle example + + @verbatim + ******************** (C) COPYRIGHT 2011 STMicroelectronics ******************* + * @file GPIO/IOToggle/readme.txt + * @author MCD Application Team + * @version V3.5.0 + * @date 08-April-2011 + * @brief Description of the GPIO IO Toggle example. + ****************************************************************************** + * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS + * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE + * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY + * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING + * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE + * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. + ****************************************************************************** + @endverbatim + +@par Example Description + +GPIO ports are connected on APB2 bus, using BSRRH and BSRRL registers 2 cycles +are required to set a pin and another cycle to reset it. So GPIO pins can toggle +at AHB clock divided by 4. + +This example describes how to use BSRR and BRR (Port Bit Set/Reset Register +and Port Bit Reset Register) for maximum IO toggling. + +PD0 and PD2 (configured in output pushpull mode) toggles in a forever loop: + - Set PD0 and PD2 by setting corresponding bits in BSRR register + - Reset PD0 and PD2 by setting corresponding bits in BRR register + +In this example, HCLK is configured at 72 MHz so PD0 and PD2 toggles at 18MHz. +To achieve the maximum IO toggling frequency, you have to configure your compiler +options for high speed optimization. + +@par Directory contents + + - GPIO/IOToggle/stm32f10x_conf.h Library Configuration file + - GPIO/IOToggle/stm32f10x_it.c Interrupt handlers + - GPIO/IOToggle/stm32f10x_it.h Header for stm32f10x_it.c + - GPIO/IOToggle/main.c Main program + - GPIO/IOToggle/system_stm32f10x.c STM32F10x system source file + +@par Hardware and Software environment + + - This example runs on STM32F10x Connectivity line, High-Density, High-Density + Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density + and Low-Density Value line Devices. + + - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density + Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL + (Connectivity line), STM3210E-EVAL (High-Density and XL-Density) and + STM3210B-EVAL (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) + +@par How to use it ? + +In order to make the program work, you must do the following : + - Copy all source files from this example folder to the template folder under + Project\STM32F10x_StdPeriph_Template + - Open your preferred toolchain + - Rebuild all files and load your image into target memory + - Run the example + +@note + - Low-density Value line devices are STM32F100xx microcontrollers where the + Flash memory density ranges between 16 and 32 Kbytes. + - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx + microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes. + - Medium-density Value line devices are STM32F100xx microcontrollers where + the Flash memory density ranges between 64 and 128 Kbytes. + - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx + microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes. + - High-density Value line devices are STM32F100xx microcontrollers where + the Flash memory density ranges between 256 and 512 Kbytes. + - High-density devices are STM32F101xx and STM32F103xx microcontrollers where + the Flash memory density ranges between 256 and 512 Kbytes. + - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where + the Flash memory density ranges between 512 and 1024 Kbytes. + - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers. + + * <h3><center>© COPYRIGHT 2011 STMicroelectronics</center></h3> + */ |