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主程序
int main(void)
{
delay_init(); //延時(shí)函數(shù)初始化
LED_Init(); //LED端口初始化
TIM1_PWM_Init(1999,719); //不分頻，PWM頻率=72000000/720/2000=50hz
while(1)
{
TIM_SetCompare1(TIM1,1950); //對(duì)應(yīng)0度 2.5%
delay_ms(1000);
TIM_SetCompare1(TIM1, 1900); //對(duì)應(yīng)45度 5%
delay_ms(1000);
TIM_SetCompare1(TIM1, 1850); //對(duì)應(yīng)90度 7.5%
delay_ms(1000);
TIM_SetCompare1(TIM1, 1800); //對(duì)應(yīng)135度 10%
delay_ms(1000);
TIM_SetCompare1(TIM1,1750); //對(duì)應(yīng)180度 12.5%
delay_ms(1000);
}
}
//配置程序
void TIM1_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);//
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外設(shè)時(shí)鐘使能
//設(shè)置該引腳為復(fù)用輸出功能,輸出TIM1 CH1的PWM脈沖波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復(fù)用推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)置在下一個(gè)更新事件裝入活動(dòng)的自動(dòng)重裝載寄存器周期的值 80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //設(shè)置用來(lái)作為T(mén)IMx時(shí)鐘頻率除數(shù)的預(yù)分頻值 不分頻
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //設(shè)置時(shí)鐘分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計(jì)數(shù)模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根據(jù) TIM_TimeBaseInitStruct中指定的參數(shù)初始化TIMx的時(shí)間基數(shù)單位
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //選擇定時(shí)器模式:TIM脈沖寬度調(diào)制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比較輸出使能
TIM_OCInitStructure.TIM_Pulse = 0; //設(shè)置待裝入捕獲比較寄存器的脈沖值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //輸出極性:TIM輸出比較極性高
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //根據(jù)TIM_OCInitStruct中指定的參數(shù)初始化外設(shè)TIMx
TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主輸出使能
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1預(yù)裝載使能
TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的預(yù)裝載寄存器
TIM_Cmd(TIM1, ENABLE); //使能TIM1
}
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舵機(jī).7z
2020-6-5 03:59 上傳
點(diǎn)擊文件名下載附件
下載積分: 黑幣 -5
184.6 KB, 下載次數(shù): 181, 下載積分: 黑幣 -5
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