TIM_TimeBase.rar_stm32f4discovery_tim

/** @page TIM_TimeBase TIM_TimeBase @verbatim ****************************************************************************** * @file TIM_TimeBase/readme.txt * @author MCD Application Team * @version V1.0.0 * @date 19-September-2011 * @brief Description of the TIM Time Base 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 This example shows how to configure the TIM peripheral in Output Compare Timing mode with the corresponding Interrupt requests for each channel in order to generate 4 different time bases. The TIM3CLK frequency is set to SystemCoreClock / 2 (Hz), to get TIM3 counter clock at 500 KHz so the Prescaler is computed as following: - Prescaler = (TIM3CLK / TIM3 counter clock) - 1 SystemCoreClock is set to 168 MHz for STM32F4xx Devices Revision A. The TIM3 CC1 register value is equal to 54618, CC1 update rate = TIM3 counter clock / CCR1_Val = 9.154 Hz, so the TIM3 Channel 1 generates an interrupt each 109.2ms The TIM3 CC2 register is equal to 27309, CC2 update rate = TIM3 counter clock / CCR2_Val = 18.31 Hz so the TIM3 Channel 2 generates an interrupt each 54.6ms The TIM3 CC3 register is equal to 13654, CC3 update rate = TIM3 counter clock / CCR3_Val = 36.62 Hz so the TIM3 Channel 3 generates an interrupt each 27.3ms The TIM3 CC4 register is equal to 6826, CC4 update rate = TIM3 counter clock / CCR4_Val = 73.25 Hz so the TIM3 Channel 4 generates an interrupt each 13.65ms. When the counter value reaches the Output compare registers values, the Output Compare interrupts are generated and, in the handler routine, 4 pins(PD.12, PD.13, PD.14 and PD.15) are toggled with the following frequencies: - PD.12: 4.57 Hz (CC1) - PD.13: 9.15 Hz (CC2) - PD.14: 18.31 Hz (CC3) - PD.15: 36.62 Hz (CC4) @par Directory contents - TIM_TimeBase/stm32f4xx_conf.h Library Configuration file - TIM_TimeBase/stm32f4xx_it.c Interrupt handlers - TIM_TimeBase/stm32f4xx_it.h Interrupt handlers header file - TIM_TimeBase/main.c Main program - TIM_TimeBase/system_stm32f4xx.c STM32F4xx system clock configuration file @par Hardware and Software environment - This example runs on STM32F4xx Devices Revision A. - This example has been tested with STM32F4-Discovery (MB997) RevA and can be easily tailored to any other development board. - STM32F4-Discovery - Use LED4, LED3, LED5 and LED6 connected respectively to PD.12, PD.13,D.14 and PD.15 pins and connect them on an oscilloscope to show the different Time Base signals. @par How to use it ? In order to make the program work, you must do the following : + EWARM - Open the TIM_TimeBase.eww workspace - Rebuild all files: Project->Rebuild all - Load project image: Project->Debug - Run program: Debug->Go(F5) + MDK-ARM - Open the TIM_TimeBase.uvproj project - Rebuild all files: Project->Rebuild all target files - Load project image: Debug->Start/Stop Debug Session - Run program: Debug->Run (F5) + TASKING - Open TASKING toolchain. - Click on File->Import, select General->'Existing Projects into Workspace' and then click "Next". - Browse to TASKING workspace directory and select the project "TIM_TimeBase" - Rebuild all project files: Select the project in the "Project explorer" window then click on Project->build project menu. - Run program: Select the project in the "Project explorer" window then click Run->Debug (F11) + TrueSTUDIO - Open the TrueSTUDIO toolchain. - Click on File->Switch Workspace->Other and browse to TrueSTUDIO workspace directory. - Click on File->Import, select General->'Existing Projects into Workspace' and then click "Next". - Browse to the TrueSTUDIO workspace directory and select the project "TIM_TimeBase" - Rebuild all project files: Select the project in the "Project explorer" window then click on Project->build project menu. - Run program: Select the project in the "Project explorer" window then click Run->Debug (F11) * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3> */