电磁场看的头都晕了，开学不努力，期末徒伤悲
辛苦抽时间写了个小程序，证明我不完全是伸手党:)顺便求F429的板子快些发货，不然就放假了:lol- #include "main.h"
- void Delay(__IO uint32_t nTime);
- int main()
- {
- SysTick_Config(SystemCoreClock / 100);
-
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC,ENABLE);
- GPIO_InitTypeDef gpio;
- gpio.GPIO_Mode=GPIO_Mode_AF;
- gpio.GPIO_OType=GPIO_OType_PP;
- gpio.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
- gpio.GPIO_Speed = GPIO_Speed_Level_1; //没以前直观了
- gpio.GPIO_PuPd=GPIO_PuPd_NOPULL;
- GPIO_Init(GPIOC,&gpio);
-
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
- GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_1); //也没以前直观了
- GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_1);
-
- TIM3->CR1 = TIM_CR1_ARPE; //使能ARR缓冲
- TIM3->CCMR2 = TIM_CCMR2_OC3M_2 + TIM_CCMR2_OC3M_1 + TIM_CCMR2_OC3PE +
- TIM_CCMR2_OC4M_2 + TIM_CCMR2_OC4M_1 + TIM_CCMR2_OC4PE; //3、4通道配置为PWM Mode 1
- TIM3->CCER = TIM_CCER_CC3E + TIM_CCER_CC4E; //使能信号输出
- TIM3->ARR = 42000000 / 1000; //1KHz PWM
-
- TIM3->EGR = TIM_EGR_UG; //更新寄存器
- TIM3->CR1 |= TIM_CR1_CEN; //使能定时器
-
- NVIC_InitTypeDef tim3_it;
- tim3_it.NVIC_IRQChannel = TIM3_IRQn ;
- tim3_it.NVIC_IRQChannelCmd = ENABLE ;
- tim3_it.NVIC_IRQChannelPriority = 3 ;
- NVIC_Init(&tim3_it);
-
- TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
-
- while(1)
- {
- }
- }
- void TIM3_IRQHandler(void)
- {
- static uint16_t n = 0; //以前的u8 u16也没有了，库仍须完善
- static uint16_t flag = 0;
- if( flag == 0 )
- n++;
- else
- n--;
- if( n == 0 || n == 1000 )
- flag = !flag;
-
- TIM3->CCR3 = 42000000 / 1000 / 1000 * n ;
- TIM3->CCR4 = 42000000 / 1000 - TIM3->CCR3;
- TIM3->SR &=~ TIM_SR_UIF;
- }
- void Delay(__IO uint32_t nTime)
- {
- TimingDelay = nTime;
- while(TimingDelay != 0);
- }
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