STM32+TIM.rar_32输出outpp_STM32 TIM2_STM32时钟输出_stm32 中断电平_stm32-

/******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** * File Name : readme.txt * Author : MCD Application Team * Version : V1.0 * Date : 10/08/2007 * Description : Description of the TIM Example3. ******************************************************************************** * THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. *******************************************************************************/ 本例展示了如何设置TIM工作在输出比较-非主动模式（Output Compare Inactive mode），并产生相应的中断。 TIM2时钟设置为36MHz，预分频设置为35999，TIM2计数器时钟可表达为： TIM2 counter clock = TIMxCLK / (Prescaler +1) = 1 KHz 设置TIM2_CCR1寄存器值为1000， CCR1寄存器值1000除以TIM2计数器时钟频率1KHz，为1000毫秒。因此，经过1000毫秒的时延，置PC.06输出为低电平。 同理，根据寄存器TIM2_CCR2 、TIM2_CCR3和 TIM2_CCR4的值，经过500毫秒的时延，置PC.07输出为低电平；经过250毫秒的时延，置PC.08输出为低电平；经过125毫秒的时延，置PC.09输出为低电平。 输出比较寄存器的值决定时延的大小，当计数器的值小于这个值的时候，点亮与PC.06-PC.09相连的LED；当计数器的值达到这个值得时候，产生中断，在TIM2的4个通道相应的中断里，把它们一一关闭。 Example description =================== This example shows how to configure the TIM peripheral in Output Compare Inactive mode with the corresponding Interrupt requests for each channel. The TIMxCLK frequency is set to 36 MHz, the Prescaler is set to 35999 and used in Output Compare Inactive Mode. TIM2 counter clock = TIMxCLK / (Prescaler +1) = 1 KHz The TIM2 CC1 register value is equal to 1000: TIM2_CC1 delay = CCR1_Val/TIM2 counter clock = 1000 ms so the PC.06 is reset after a delay equal to 1000 ms. The TIM2 CC2 register value is equal to 500: TIM2_CC2 delay = CCR2_Val/TIM2 counter clock = 500 ms so the PC.07 is reset after a delay equal to 500 ms. The TIM2 CC3 register value is equal to 250: TIM2_CC3 delay = CCR3_Val/TIM2 counter clock = 250 ms so the PC.08 is reset after a delay equal to 250 ms. The TIM2 CC4 register value is equal to 125: TIM2_CC4 delay = CCR4_Val/TIM2 counter clock = 125 ms so the PC.09 is reset after a delay equal to 125 ms. While the counter is lower than the Output compare registers values, which determines the Output delay, the PC.06, PC.07, PC.08 and PC.09 pin are turned on. When the counter value reaches the Output compare registers values, the Output Compare interrupts are generated and, in the handler routine, these pins are turned off. Directory contents ================== stm32F10x_conf.h Library Configuration file stm32F10x_it.c Interrupt handlers stm32F10x_it.h Interrupt handlers header file main.c Main program Hardware environment ==================== Connect an oscilloscope on: - PC.06 - PC.07 - PC.08 - PC.09 to show the different signals. How to use it ============= In order to make the program work, you must do the following: - Create a project and setup all your toolchain's start-up files - Compile the directory content files and required Library files: + stm32F10x_lib.c + stm32F10x_tim.c + stm32F10x_gpio.c + stm32F10x_rcc.c + stm32F10x_nvic.c + stm32F10x_flash.c - Link all compiled files and load your image into either RAM or Flash - Run the example ******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE******