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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