| 这是main.c 主程序4 H/ A$ q& @8 R! k : U. R. A- n9 I //这是STM32F103ZE的一个模板 //在PA8 PB13 产生一个互补的PWM波，频率为10KHz,占空比为1/5) Q* ^" f9 _5 I1 A #include "stm32f10x.h"1 X- Z4 }1 j" h" l. y BitAction bbt=0; //定义一个位变量 bbt,并清0 u16 i; int main(void) {" B5 @& U4 [7 n$ K7 n; x: N u16 InitValue,Pre_Divide,ZKB;" }$ h" M x3 d SystemInit(); //系统时钟初始化，调用该函数后，系统时钟为72M，函数原形在system_stm32f10x.c中 GPIO_init();. |+ F, A: j" ]- ?6 L4 y+ ?3 } //****TIM1_PWM波1通道设置****************************************************************; X& g& ]0 M. S0 j5 A) b( l( @ InitValue=7200; //初值1000' B9 m7 c5 U! ~; \ Pre_Divide=1; //预分频1' l. s5 r7 _/ r ZKB=1200; //占空比 TIM1_PWM_1_init(InitValue,Pre_Divide,ZKB);( V. j7 m+ B* F ) ? j; F: L1 E d( M" e; U. h! R //TIM1->CCR1=2400; //修改占空比$ {' @* N$ H8 N2 @# N* ]+ w- } //**************************************************************************************% `, j% {: _8 g2 I/ H7 D- w }( K . e* l: K/ U& A% ] while(1) { //. y; u7 ^7 ~; M& X. F# `, X% F+ [ }8 X: P4 F$ d, z) H; `8 [ } 4 v* o1 J; c9 N 这是sysinit.c 系统程序- G2 `# O2 X9 }( [' o0 S6 c & Y2 m! ?8 G3 C! ^5 J4 p- m #include "stm32f10x.h"% C. n' U# K& x- x6 x2 f E6 q- Y4 G# _& W$ N void GPIO_init() { GPIO_InitTypeDef GPIO_InitStructure; //声明端口结构，需要放在前面 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB,ENABLE); //开启相应端口时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);" n6 _" N- l) E/ \* k$ [) m/ ?' S8 x% ^ //***************端口A8,A9,A10是TIM1_PWM波的输出端***************************$ U& Q6 H: _, N4 m9 v: V' s4 O GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //PWM波设为复用推挽输出% ~% j* y; ?$ T GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //端口频率可设为2，10，50% R8 C& [, C% H8 a GPIO_Init(GPIOA, &GPIO_InitStructure); //启动A端口 //***************************************************************************! S! I! G s. J7 R //**************端口B13,B14,B15是TIM1_PWM波的互补输出端**********************+ X/ H% p7 K+ D# a) x+ z GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;- E& Q) s4 h+ G GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; //端口频率可设为2，10，50 GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //PWM波的复用推挽输出: g. C" u2 ] e GPIO_Init(GPIOB,&GPIO_InitStructure); //启动B端口 //*************************************************************************** }7 L0 P* ^& q5 E/ { //****TIM1_PWM波1通道初始化**********************************************************************1 \0 N5 h# c6 w8 R1 F void TIM1_PWM_1_init(u16 InitValue, u16 Pre_Divide, u16 CCR1_Val) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);* H; m& [2 c; v TIM_TimeBaseStructure.TIM_Period =InitValue;& X- a( r' x9 M Y+ r/ ^8 a TIM_TimeBaseStructure.TIM_Prescaler =Pre_Divide-1;/ L- j" u2 J3 b+ i: n TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down; TIM_TimeBaseStructure.TIM_RepetitionCounter=0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);1 t1 H; B1 q- n# u. V+ |( e S TIM_ARRPreloadConfig(TIM1,ENABLE); //使能TIM1在ARR上的预装载寄存器# f# r/ X) {5 }4 D0 b TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;// 选择定时器模式 TIM脉冲宽度调制模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //选择输出比较状态" P+ Q7 i3 s+ q. M( s9 x3 J TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //选择互补输出比较状态1 V) ^6 D7 L# X& R TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //选择输出极性 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //选择互补输出极性 TIM_OCInitStructure.TIM_Pulse = CCR1_Val; //设置待装入捕获比较寄存器的脉冲值 TIM_OC1Init(TIM1, &TIM_OCInitStructure);//捕获比较匹配器结构1通道赋值 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //使能TIM1在CCR1上的预装载寄存器 //死区设置 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;//TIM1_OSSRState设置在运行模式下非工作状态选项 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;//TIM1_OSSIState设置在空闲模式下非工作状态选项(使能TIM1 OSSI状态)& C+ Y8 z4 L* G( ?' Z$ A9 T D b TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; //TIM1_LOCKLevel设置了锁电平参数(不锁任何位) TIM_BDTRInitStructure.TIM_DeadTime = 0x90; //这里调整死区大小0-0xff,TIM1_DeadTIM1指定了输出打开和关闭状态之间的延时 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; //TIM1_Break使能或者失能TIM1刹车输入(失能TIM1刹车输入)# k1 t9 d9 [# r% a2 m- z* Z TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;//TIM1_BreakPolarity设置TIM1刹车输入管脚极性（TIM1刹车输入管脚极性高）: ^1 T. m) z8 u$ j TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;//TIM1_AutomaticOutput使能或者失能自动输出功能（自动输出功能使能） TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);//(设置刹车特性，死区时间，锁电平，OSSI，OSSR状态和AOE（自动输出使能）) TIM_Cmd(TIM1, ENABLE); //使能或者失能指定的TIM1! w! m; V6 ^' A5 N: y4 @9 T' C# `, h TIM_CtrlPWMOutputs(TIM1, ENABLE); //使能或者失能TIM1外设的主输出 } |
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