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view libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/OCActive/main.c @ 8:58d76cf522ff
Split out code into separate files.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Sat, 04 Feb 2012 13:29:31 +1030 |
parents | c59513fd84fb |
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/** ****************************************************************************** * @file TIM/OCActive/main.c * @author MCD Application Team * @version V3.5.0 * @date 08-April-2011 * @brief Main program body ****************************************************************************** * @attention * * 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. * * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f10x.h" /** @addtogroup STM32F10x_StdPeriph_Examples * @{ */ /** @addtogroup TIM_OCActive * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; uint16_t CCR1_Val = 1000; uint16_t CCR2_Val = 500; uint16_t CCR3_Val = 250; uint16_t CCR4_Val = 125; uint16_t PrescalerValue = 0; /* Private function prototypes -----------------------------------------------*/ void RCC_Configuration(void); void GPIO_Configuration(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32f10x_xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32f10x.c file */ /* System Clocks Configuration */ RCC_Configuration(); /* Configure the GPIO ports */ GPIO_Configuration(); /* --------------------------------------------------------------- TIM3 Configuration: TIM3CLK = SystemCoreClock / 2, The objective is to get TIM3 counter clock at 1 KHz: - Prescaler = (TIM3CLK / TIM3 counter clock) - 1 And generate 4 signals with 4 different delays: TIM3_CH1 delay = CCR1_Val/TIM3 counter clock = 1000 ms TIM3_CH2 delay = CCR2_Val/TIM3 counter clock = 500 ms TIM3_CH3 delay = CCR3_Val/TIM3 counter clock = 250 ms TIM3_CH4 delay = CCR4_Val/TIM3 counter clock = 125 ms * SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density and Connectivity line devices and to 24 MHz for Low-Density Value line and Medium-Density Value line devices --------------------------------------------------------------- */ /*Compute the prescaler value */ PrescalerValue = (uint16_t) (SystemCoreClock / 2000) - 1; /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); /* Output Compare Active Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Active; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR1_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC1Init(TIM3, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable); /* Output Compare Active Mode configuration: Channel2 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR2_Val; TIM_OC2Init(TIM3, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Disable); /* Output Compare Active Mode configuration: Channel3 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC3Init(TIM3, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Disable); /* Output Compare Active Mode configuration: Channel4 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR4_Val; TIM_OC4Init(TIM3, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Disable); TIM_ARRPreloadConfig(TIM3, ENABLE); #ifdef STM32F10X_CL /* Set PD.07 pin */ GPIO_SetBits(GPIOD, GPIO_Pin_7); #else /* Set PC.06 pin */ GPIO_SetBits(GPIOC, GPIO_Pin_6); #endif /* TIM3 enable counter */ TIM_Cmd(TIM3, ENABLE); while (1) {} } /** * @brief Configures the different system clocks. * @param None * @retval None */ void RCC_Configuration(void) { /* PCLK1 = HCLK/4 */ RCC_PCLK1Config(RCC_HCLK_Div4); /* TIM3 clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /* GPIOA and GPIOC clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); } /** * @brief Configure the TIM3 and the GPIOE Pins. * @param None * @retval None */ void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; #ifdef STM32F10X_CL /*GPIOB Configuration: TIM3 channel1, 2, 3 and 4 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE); /* GPIOD Configuration: Pin7 an Output push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOD, &GPIO_InitStructure); #else /* GPIOA Configuration:TIM3 Channel1, 2, 3 and 4 as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; GPIO_Init(GPIOB, &GPIO_InitStructure); /* GPIOC Configuration: Pin6 an Output push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); #endif } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t* file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ while (1) {} } #endif /** * @} */ /** * @} */ /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/