战舰V3&精英板定时器完全重映射测试程序(TIM1,TIM2,TIM3,TIM4)

peng1554 · 发表于 2018-9-1 22:41:18

本帖最后由 peng1554 于 2018-9-1 22:53 编辑

战舰V3和精英板子的主芯片是STM32F103ZET6，能够进行定时器重映射的有TIM1,TIM2,TIM3,TIM4，所以是程序是对这4个定时器进行完全重映射测试并进行4路PWM输出（频率一样占空比不同），其中TIM2重映射引脚PA15和PB3被JTAG接口占用，需要调用GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE)禁用JTAG使能SW
[mw_shl_code=c,true]GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//关闭jtag 开启sw[/mw_shl_code]
重映射这块需要根据芯片数据手册查看可以进行重映射的定时器并设置相关IO，定时器时基参数和输出通道，以TIM2为例[mw_shl_code=c,true]//TIMx PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM2_PWM_Init(u16 arr,u16 psc)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);  //使能GPIOA,B时钟时钟
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //时钟使能
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);  //使能AFIO时钟
      GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//关闭jtag 开启sw
      GPIO_PinRemapConfig(GPIO_FullRemap_TIM2,ENABLE);//映射为TIMx

      //设置该引脚为复用输出功能,输出TIMx_CHx的PWM脉冲波形
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; //TIMx_CHx
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

//设置该引脚为复用输出功能,输出TIM1x_CHx的PWM脉冲波形
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_10|GPIO_Pin_11; //TIMx_CHx
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
      TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  不分频
      TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
      TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
      TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高

      TIM_OC1Init(TIM2, &TIM_OCInitStructure);  //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
      TIM_OC2Init(TIM2, &TIM_OCInitStructure);
      TIM_OC3Init(TIM2, &TIM_OCInitStructure);
      TIM_OC4Init(TIM2, &TIM_OCInitStructure);

      TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
      TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
      TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);
      TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);

      TIM_CtrlPWMOutputs(TIM2,ENABLE);       //MOE 主输出使能
      TIM_ARRPreloadConfig(TIM2, ENABLE); //使能TIMx在ARR上的预装载寄存器
      TIM_Cmd(TIM2, ENABLE);  //使能TIMx
}[/mw_shl_code]
设置占空比这块可以调用TIM_SetCompare1/2/3/4()[mw_shl_code=c,true] int main(void)
{
      delay_init();                   //延时函数初始化
      LED_Init();                            //LED端口初始化
      TIM2_PWM_Init(1799,79);//不分频。PWM频率=72000/(1799+1)（79+1）=xxx  KHZ
      TIM_SetCompare1(TIM2,900);
      TIM_SetCompare2(TIM2,100);
      TIM_SetCompare3(TIM2,600);
      TIM_SetCompare4(TIM2,1300);
}[/mw_shl_code]