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view libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/ComplementarySignals/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/ComplementarySignals/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_ComplementarySignals * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; uint16_t TimerPeriod = 0; uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 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(); /* GPIO Configuration */ GPIO_Configuration(); /* ----------------------------------------------------------------------- TIM1 Configuration to: 1/ Generate 3 complementary PWM signals with 3 different duty cycles: TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is equal to 0 so the TIM1 counter clock used is SystemCoreClock. * SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density and Connectivity line devices. For Low-Density Value line and Medium-Density Value line devices, SystemCoreClock is set to 24 MHz. The objective is to generate PWM signal at 17.57 KHz: - TIM1_Period = (SystemCoreClock / 17570) - 1 The Three Duty cycles are computed as the following description: The channel 1 duty cycle is set to 50% so channel 1N is set to 50%. The channel 2 duty cycle is set to 25% so channel 2N is set to 75%. The channel 3 duty cycle is set to 12.5% so channel 3N is set to 87.5%. The Timer pulse is calculated as follows: - ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100 2/ Insert a dead time equal to 11/SystemCoreClock ns 3/ Configure the break feature, active at High level, and using the automatic output enable feature 4/ Use the Locking parameters level1. ----------------------------------------------------------------------- */ /* Compute the value to be set in ARR register to generate signal frequency at 17.57 Khz */ TimerPeriod = (SystemCoreClock / 17570) - 1; /* Compute CCR1 value to generate a duty cycle at 50% for channel 1 */ Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10); /* Compute CCR2 value to generate a duty cycle at 25% for channel 2 */ Channel2Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100); /* Compute CCR3 value to generate a duty cycle at 12.5% for channel 3 */ Channel3Pulse = (uint16_t) (((uint32_t) 125 * (TimerPeriod - 1)) / 1000); /* Time Base configuration */ TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = TimerPeriod; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); /* Channel 1, 2 and 3 Configuration in PWM mode */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; TIM_OCInitStructure.TIM_Pulse = Channel1Pulse; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OC1Init(TIM1, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; TIM_OC2Init(TIM1, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_Pulse = Channel3Pulse; TIM_OC3Init(TIM1, &TIM_OCInitStructure); /* Automatic Output enable, Break, dead time and lock configuration*/ TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1; TIM_BDTRInitStructure.TIM_DeadTime = 11; TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); /* TIM1 counter enable */ TIM_Cmd(TIM1, ENABLE); /* Main Output Enable */ TIM_CtrlPWMOutputs(TIM1, ENABLE); while (1) { } } /** * @brief Configures the different system clocks. * @param None * @retval None */ void RCC_Configuration(void) { /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOE| RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE); } /** * @brief Configure the TIM1 Pins. * @param None * @retval None */ void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; #ifdef STM32F10X_CL /* GPIOE Configuration: Channel 1/1N, 2/2N, 3/3N as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13| GPIO_Pin_8|GPIO_Pin_10|GPIO_Pin_12; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOE, &GPIO_InitStructure); /* GPIOE Configuration: BKIN pin */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOE, &GPIO_InitStructure); /* TIM1 Full remapping pins */ GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); #else /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_Init(GPIOB, &GPIO_InitStructure); /* GPIOB Configuration: BKIN pin */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &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****/