STM32 TIM1TIM2控制輸出8路不同占空比的PWM(實現4個電機的差速控制)源代碼

ID:279493 · 發表于 2018-1-25 08:12

用keil 開發的可輸出8路PWM STM32單片機程序, 利用定時器TIM1和TIM2進行控制輸出.
這里是用STM32產生8路的pwm,方便實現4個電機的差速控制。

下載：

STM32-8PWM.rar (448.36 KB, 下載次數: 228)

單片機源程序如下:

#include "stm32f10x.h"
//#include "systick.h" //SysTick定時器被捆綁在NVIC中系統函數
//#include "hardware_conf.h"//所用開發板中硬件外設系統函數
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//啟動GPIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
//啟動AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//啟動TIM1，功能復用IO時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//使能或者失能APB1外設時鐘,RCC_APB1Periph_TIM2 為TIM2時鐘，這里的意思是使能TIM4時鐘
//Step2. GPIO做相應設置，為AF輸出，使能TIM時鐘
//PA.0,1,2,3,8,9,10,11口設置為TIM1的OC1輸出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_8 | GPIO_Pin_9|GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//復用推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//端口速率為50Mhz
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* //PB.13/14口設置為TIM1_CH1N和TIM1_CH2N輸出口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); */
}
//Step3. TIM模塊初始化
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;//初始化TIM的固定格式, 根據TIM_TimeBaseInitStruct中指定的參數初始化//TIMx的時間基數單位
TIM_OCInitTypeDef TIM_OCInitStructure;// 根據TIM_OCInitStruct中指定的參數初始化外設TIMx
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//TIM1基本計數器設置（設置PWM頻率）
//頻率=TIM1_CLK/(ARR+1) 頻率為1khz
TIM_BaseInitStructure.TIM_Period = 1000-1;
TIM_BaseInitStructure.TIM_Prescaler = 72-1;
TIM_BaseInitStructure.TIM_ClockDivision = 0;
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_BaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);
TIM_ARRPreloadConfig(TIM1, ENABLE);//啟用ARR的影子寄存器（直到產生更新事件才更改設置）
TIM_ARRPreloadConfig(TIM2, ENABLE); /* 使能 ARR裝載 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
// TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
//TIM1_OC1模塊設置（設置1通道占空比）
TIM_OCInitStructure.TIM_Pulse = 100;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);//啟用CCR1寄存器的影子寄存器（直到產生更新事件才更改設置）
//TIM1_OC2模塊設置（設置2通道占空比）
TIM_OCInitStructure.TIM_Pulse = 300;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);//啟用CCR2寄存器的影子寄存器（直到產生更新事件才更改設置）
//TIM1_OC3模塊設置（設置2通道占空比）
TIM_OCInitStructure.TIM_Pulse = 600;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);//啟用CCR3寄存器的影子寄存器（直到產生更新事件才更改設置）
//TIM1_OC3模塊設置（設置2通道占空比）
TIM_OCInitStructure.TIM_Pulse = 900;
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);//啟用CCR2寄存器的影子寄存器（直到產生更新事件才更改設置）
//死區設置
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_DeadTime = 0x90; //這里調整死區大小0-0xff
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
//TIM1基本計數器設置（設置PWM頻率）
//頻率=TIM1_CLK/(ARR+1) 頻率為1khz
TIM_BaseInitStructure.TIM_Period = 1000-1;
TIM_BaseInitStructure.TIM_Prescaler = 72-1;
TIM_BaseInitStructure.TIM_ClockDivision = 0;
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_BaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_BaseInitStructure);
/* TIM_Pulse用來控制占空比，他實際影響TIM的CCR2寄存器，程序中可隨時更改該寄存器的值，可隨時更改占空比。占空比=(CCRx/ARR)*100。*/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; /* 輸出模式 */ //其中，TIM_OCMode選擇定時器模式，TIM_OCMode_PWM1 ,TIM脈沖寬度調制模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //狀態使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//TIM_OCPolarity輸出極性,其輸出極性為高
TIM_OCInitStructure.TIM_Pulse =100;//TIM_Pulse設置了待裝入捕獲比較寄存器的脈沖值
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse =300;//TIM_Pulse設置了待裝入捕獲比較寄存器的脈沖值
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse =600;//TIM_Pulse設置了待裝入捕獲比較寄存器的脈沖值
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse =900;//TIM_Pulse設置了待裝入捕獲比較寄存器的脈沖值
TIM_OC4Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable); //TIM_OC1PreloadConfig使能或者失能TIMx在CCR1上的預裝載寄存器
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable); /* 使能TIM2在CCR2的預裝儲存器 *///CCR2為捕獲/比較寄存器2
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable); /* 使能TIM2在CCR3的預裝儲存器 *///CCR3為捕獲/比較寄存器2
TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable); /* 使能TIM2在CCR4的預裝儲存器 *///CCR4為捕獲/比較寄存器2
//TIM1,2開啟
TIM_Cmd(TIM1, ENABLE);
TIM_Cmd(TIM2, ENABLE);
//TIM1_OC通道輸出PWM（一定要加）
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
main(void)
{
SystemInit(); //系統所有外設初始化
GPIO_Configuration(); //所有端口外設配置初始化
TIM_Configuration();
while (1);
}