标签：trigger logs out frequency amp lock compare period code
步进电机驱动设置：
STM32单片机程序：
配置STM32的定时器模式，TIM2为主定时器，TIM3为从定时器，其中PulseFrequency为TIM输出PWM的频率。其主要功能，将TIM2的输出中断TR1指定到TIM3的计数器输入中，每当TIM2输出完成，TIM3就进行一次计数，当TIM3完成计数时，向系统提出一次中断。
void TIM2_Master__TIM3_Slave_Configuration(u32 PulseFrequency) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; u16 nPDTemp ; //配置TIM2为输出PWM的端口，PulseFrequency为设置的PWM频率 TIM_Cmd(TIM2, DISABLE); nPDTemp = 72000UL/PulseFrequency; // 更改频率时，注意处理72000UL及TIM_Prescaler，使TIM_Period不要超过0xFFFF // 时基配置：配置PWM输出定时器——TIM2 /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = nPDTemp-1; TIM_TimeBaseStructure.TIM_Prescaler = 999; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); // 输出配置：配置PWM输出定时器——TIM2 /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = nPDTemp>>1;//50% TIM_OC1Init(TIM2, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM2, ENABLE); // 时基配置：配置脉冲计数寄存器——TIM3 TIM_TimeBaseStructure.TIM_Period = 0xFFFF; TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); // Output Compare Active Mode configuration: Channel1 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 0xFFFF; // 这里的配置值意义不大 TIM_OC1Init(TIM3, &TIM_OCInitStructure); // 配置TIM2为主定时器 // Select the Master Slave Mode TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable); // Master Mode selection TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update); // 配置TIM3为从定时器 // Slave Mode selection: TIM3 TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated); TIM_SelectInputTrigger(TIM3, TIM_TS_ITR1); TIM_ITRxExternalClockConfig(TIM3, TIM_TS_ITR1); // TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE); TIM_Cmd(TIM2, DISABLE); TIM_Cmd(TIM3, DISABLE); }
再添加TIM的比较数值，当计数超过该数值时产生一次中断：
void Output_Pulse(u16 Num) { TIM3->CCR1 = Num; TIM3->CNT = 0; TIM_Cmd(TIM3, ENABLE); TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE); TIM_Cmd(TIM2, ENABLE); }
在TIM3的中断程序中，若发送中断后，则停止TIM2，和TIM3的定时功能，因此该程序完成了使用TIM2和TIM3完成指定个数的PWM波输出。
void TIM3_IRQHandler(void) { if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET) // TIM_IT_CC1 { TIM_ClearITPendingBit(TIM3, TIM_IT_CC1); // 清除中断标志位 TIM_Cmd(TIM2, DISABLE); // 关闭定时器 TIM_Cmd(TIM3, DISABLE); // 关闭定时器 TIM_ITConfig(TIM3, TIM_IT_CC1, DISABLE); TIM2_Pulse_TIM3_Counter_OK=1; } }
标签：trigger logs out frequency amp lock compare period code
原文地址：http://www.cnblogs.com/RobotDesign-NUAA/p/6492577.html
