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`/* MAIN.C file 摘要: 1.PA6延时反转,指示系统工作。 2.上电,按指定PWM输出延时换相,实现电机基本运转功能。 2013.5.8 */ #include "stm8s.h" #define STM8_FREQ_MHZ 16 #define PWM_FREQUENCY 16000 static const u16 hArrPwmVal = ((u16)((STM8_FREQ_MHZ * (u32)1000000)/PWM_FREQUENCY)); //PWM信号周期 #define PWMOUT 20 //按15%占空比输出 const unsigned char PWM_EN1_TAB[6]={0x00,0x00,0x01,0x01,0x10,0x10}; //六步法中,CH1CH2通道极性及使能配置 const unsigned char PWM_EN2_TAB[6]={0x01,0x01,0x00,0x00,0x00,0x00}; //六步法中,CH3通道极性及使能配置 //上桥臂开关控制端口定义 #define MCO1_PORT GPIOC #define MCO1_PIN GPIO_PIN_1 #define MCO3_PORT GPIOC #define MCO3_PIN GPIO_PIN_2 #define MCO5_PORT GPIOC #define MCO5_PIN GPIO_PIN_3 //下桥臂开关控制端口定义 #define MCO0_PORT GPIOB #define MCO0_PIN GPIO_PIN_0 #define MCO2_PORT GPIOB #define MCO2_PIN GPIO_PIN_1 #define MCO4_PORT GPIOB #define MCO4_PIN GPIO_PIN_2 //下桥臂低电平开关管导通 #define PWM_A_OFF MCO0_PORT->ODR |= (u8)MCO0_PIN; #define PWM_B_OFF MCO2_PORT->ODR |= (u8)MCO2_PIN; #define PWM_C_OFF MCO4_PORT->ODR |= (u8)MCO4_PIN; #define PWM_A_ON MCO0_PORT->ODR &= (u8)(~MCO0_PIN); #define PWM_B_ON MCO2_PORT->ODR &= (u8)(~MCO2_PIN); #define PWM_C_ON MCO4_PORT->ODR &= (u8)(~MCO4_PIN); //换相子函数声明 void Commutation(unsigned char bHallStartStep,unsigned int OutPwmValue); //初始化按键,指示灯端口 void GPIO_int(void) { /* LEDs */ GPIO_Init(GPIOA, GPIO_PIN_1, GPIO_MODE_OUT_PP_HIGH_FAST); } //系统时钟配置:内部16M void Clock_init(void) { /* Select fCPU = 16MHz */ CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1); } //换相电路开关管IO初始化 void PWM_IO_init(void) { //PB012 下桥臂0有效 ,配置为高电平 GPIO_Init(MCO0_PORT, MCO0_PIN,GPIO_MODE_OUT_PP_HIGH_FAST); GPIO_Init(MCO2_PORT, MCO2_PIN,GPIO_MODE_OUT_PP_HIGH_FAST); GPIO_Init(MCO4_PORT, MCO4_PIN,GPIO_MODE_OUT_PP_HIGH_FAST); //PC123 上桥臂1有效,配置为低电平 GPIO_Init(MCO1_PORT, MCO1_PIN,GPIO_MODE_OUT_PP_LOW_FAST); GPIO_Init(MCO3_PORT, MCO3_PIN,GPIO_MODE_OUT_PP_LOW_FAST); GPIO_Init(MCO5_PORT, MCO5_PIN,GPIO_MODE_OUT_PP_LOW_FAST); } //高级定时器初始化配置 void Tim1_init(void) { /* TIM1 Peripheral Configuration */ TIM1_DeInit(); TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, hArrPwmVal, 0); TIM1_OC1Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, hArrPwmVal*0, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_SET); TIM1_OC2Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, hArrPwmVal*0, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_SET); TIM1_OC3Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, hArrPwmVal*0, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_SET); TIM1_CCPreloadControl(DISABLE); TIM1_Cmd(ENABLE); } main() { unsigned int tem_c=0; unsigned char step=0; unsigned int outpwm=0; for(tem_c=0;tem_c<50000;tem_c++);//上电延时,等待系统稳定 Clock_init();//指示灯端口初始化 GPIO_int();//时钟配置 PWM_IO_init();//开关管控制端口初始化 Tim1_init();//高级定时器配置 outpwm=hArrPwmVal*PWMOUT/100; while (1) { for(tem_c=0;tem_c<7000;tem_c++);//延时时间 GPIO_WriteReverse(GPIOA,GPIO_PIN_1);//PA6指示灯反转 step++; if(step>=6)step=0; Commutation(step,outpwm); } } //换向输出PWM值, //bHallStartStep:当前换相步序0-5,OutPwmValue 输出PWM值 void Commutation(unsigned char bHallStartStep,unsigned int OutPwmValue) { unsigned int tem_c=0; TIM1->BKR &= (uint8_t)(~TIM1_BKR_MOE);//禁止PWM输出 if(bHallStartStep!=3&&bHallStartStep!=4) PWM_A_OFF; if(bHallStartStep!=0&&bHallStartStep!=5) PWM_B_OFF; if(bHallStartStep!=1&&bHallStartStep!=2) PWM_C_OFF; //根据换相步序,打开不同的开关管,并施加正确的PWM信号 if(bHallStartStep==0)//AB { TIM1->CCR1H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR1L = (uint8_t)(OutPwmValue); PWM_B_ON; } else if(bHallStartStep==1) //AC { TIM1->CCR1H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR1L = (uint8_t)(OutPwmValue); PWM_C_ON; } else if(bHallStartStep==2) //BC { TIM1->CCR2H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR2L = (uint8_t)(OutPwmValue); PWM_C_ON; } else if(bHallStartStep==3) //BA { TIM1->CCR2H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR2L = (uint8_t)(OutPwmValue); PWM_A_ON; } else if(bHallStartStep==4)//CA { TIM1->CCR3H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR3L = (uint8_t)(OutPwmValue); PWM_A_ON; } else if(bHallStartStep==5) //CB { TIM1->CCR3H = (uint8_t)(OutPwmValue >> 8); TIM1->CCR3L = (uint8_t)(OutPwmValue); PWM_B_ON; } TIM1->CCER1=PWM_EN1_TAB[bHallStartStep]; TIM1->CCER2=PWM_EN2_TAB[bHallStartStep]; TIM1->BKR|=TIM1_BKR_MOE;//使能PWM输出 } 通过TIM1的PWM输出控制上管,通过GPIO输出控制下管 根据换向步序,打开不同的开关管,并施加正确的PWM信号 但是T1和T2的波形不对,是怎么一回事啊,求解啊 |
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黄色表示MOS管打开了,调压换相, 低下的信号应该是TIMER1的PWM输出信号。这个信号看起来时序没啥太大问题。
最好用四通道的示波器,UVW 三相和PWM调压看的一清二楚。 |
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