STM32_DMA_PWM.zip

#include "include.h" #include "stm32f10x_gpio.h" #include "stm32f10x_exti.h" #include "stm32f10x_dma.h" #include "delay.h" #include "sys.h" #include "oled.h" #include "bmp.h" #include "rocket.h" #include "gpio.h" #include "it.h" #include "main.h" #define SYSCLK_FREQ_72MHz CLK72M void SimpleBeep(void); void NVIC_SET(void); void GPIO_SET(void); void DMA_SET(void); void TIM_SET(void); void DMA_TRANSFER(void); u16 DMA_send_feedback(DMA_Channel_TypeDef* DMA_CHx); void DebugCCR(void); ////////////////////////////////////////////////////////////////////////////// volatile u16 send_buf[size]; u32 DMA_ISR_COPY; //KEY* K1 = KeyMap(GPIOA,GPIO_Pin_8,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K2 = KeyMap(GPIOB,GPIO_Pin_12,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K3 = KeyMap(GPIOB,GPIO_Pin_13,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K4 = KeyMap(GPIOB,GPIO_Pin_14,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K5 = KeyMap(GPIOB,GPIO_Pin_15,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K6 = KeyMap(GPIOC,GPIO_Pin_13,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K7 = KeyMap(GPIOC,GPIO_Pin_14,GPIO_Mode_IPU,GPIO_Speed_50MHz); //KEY* K8 = KeyMap(GPIOC,GPIO_Pin_15,GPIO_Mode_IPU,GPIO_Speed_50MHz); int count = 0; int count_it = 0; int InitDone = 0; int main(void) { int i; delay_init(); NVIC_SET(); GPIO_SET(); OLED_Init(); OLED_ColorTurn(0);//0������ʾ��1 ��ɫ��ʾ OLED_DisplayTurn(0);//0������ʾ 1 ��Ļ��ת��ʾ GPIO_ResetBits(GPIOB,GPIO_Pin_12); //SimpleBeep(); DelayBeep(); OLED_ShowString(0,48,"init_finish",8,1); OLED_Refresh(); //TIM_SET(); //DMA_SET(); DMA_START(); while(1) { // DMA_Enable(PWM_TIM,DMA_CHANNEL); // feedback = DMA_send_feedback(DMA_CHANNEL); // if(feedback != 0) // { // OLED_ShowNum(64,0,feedback,4,16,1); // OLED_Refresh(); // } } } void GPIO_SET(void) { //打开端口 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE); //使用EXTI需要开AFIO(复用IO) RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); //TIM3 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //蜂鸣器PA1,送方波，遇低电平触发 //StdSetGPIO(BeepPort, BeepPin,GPIO_Mode_Out_PP,GPIO_Speed_2MHz,1); //增加NE555做振荡源，光耦PC817第1脚接VCC3.3，第2脚接BeepPin, //当低电平时，才有电流经过PC817，所以需要低电平触发 //GPIO_Mode_IPU,默认处于高电平状态，没有电流通过 StdSetGPIO(BeepPort, BeepPin,GPIO_Mode_IPU,GPIO_Speed_2MHz,1); //板载LED，PC13,LED接VCC，所以需要低电平触发 StdSetGPIO(OnBoardLedPort, OnBoardLedPin,GPIO_Mode_IPU,GPIO_Speed_2MHz,1); //按键(上拉模式，置1) StdSetGPIO(KeyPort, K1Pin|K2Pin|K3Pin|K4Pin|K5Pin|K6Pin|K7Pin|K8Pin,GPIO_Mode_IPU,GPIO_Speed_10MHz,1); //外部中断 StdSetEXTI(GPIO_PortSourceGPIOA,GPIO_PinSource0, EXTI_Line0 | EXTI_Line1 | EXTI_Line2 | EXTI_Line3 | EXTI_Line4 | EXTI_Line5 | EXTI_Line6 | EXTI_Line7, EXTI_Mode_Interrupt,EXTI_Trigger_Rising_Falling); //14线检测PWM数量 StdSetGPIO(GPIOB, GPIO_Pin_14,GPIO_Mode_IPD,GPIO_Speed_50MHz,0); StdSetEXTI(GPIO_PortSourceGPIOB,GPIO_PinSource14, EXTI_Line14 , EXTI_Mode_Interrupt,EXTI_Trigger_Rising); InitDone ++; } void NVIC_SET(void) { NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); StdSetNVIC(EXTI0_IRQn,1,1); StdSetNVIC(EXTI1_IRQn,1,1); StdSetNVIC(EXTI2_IRQn,1,1); StdSetNVIC(EXTI3_IRQn,1,1); StdSetNVIC(EXTI4_IRQn,1,1); StdSetNVIC(EXTI9_5_IRQn,1,1); StdSetNVIC(EXTI15_10_IRQn,1,0); //StdSetNVIC(TIM3_IRQn,2,2); } u16 DMA_send_feedback(DMA_Channel_TypeDef* DMA_CHx) { return DMA_CHx->CNDTR; } void TIM3_IRQHandler(void) { if(TIM_GetITStatus(TIM3, TIM_IT_Update) == SET) { TIM_ClearITPendingBit(TIM3, TIM_IT_Update); } } //传输完成 void DMA1_Channel2_IRQHandler(void) { if(DMA_GetITStatus(DMA1_IT_TC2) == SET) { DMA_ClearITPendingBit(DMA1_IT_TC2); TIM_Cmd(PWM_TIM, DISABLE); DMA_Cmd(DMA1_Channel2, DISABLE); //调试，看状态 //OLED_ShowNum(0,48,(u32)DMA_GetFlagStatus( DMA1_FLAG_TC2 ),3,8,1); //OLED_Refresh(); // // need to disable this, otherwise some glitches can occur (first bit gets lost) // TIM_DMACmd(PWM_TIM, TIM_DMA_CC3, DISABLE); DMA_ClearFlag(DMA1_FLAG_TC2); //完成后清除 GPIO_ResetBits(PwmPort,PwmPin); DMA_SetCurrDataCounter( DMA1_Channel2 , size); OLED_ShowString(0,48,"dma_disable",8,1); OLED_Refresh(); } if(DMA_GetITStatus(DMA1_IT_TE2) == SET) { DMA_ClearITPendingBit(DMA1_IT_TE2); OLED_ShowString(0,48,"dma_error",8,1); OLED_Refresh(); } //ledBusy = 0; // get ready for next transfer } void DebugCCR(void) { OLED_ShowString(0,0,"CCR:",8,1);OLED_ShowNum(40,0,DMA_CHANNEL->CCR,12,8,1); OLED_Refresh(); } void DMA_SET(void) { StdSetGPIO(PwmPort,PwmPin,GPIO_Mode_AF_PP,GPIO_Speed_50MHz,0); DMA_Cmd( DMA_CHANNEL, DISABLE); TIM_Cmd(PWM_TIM,DISABLE); StdSetTimeBase(PWM_TIM,99,71,0,TIM_CounterMode_Up,0,ENABLE); StdSetTimOC(PWM_TIM,3,TIM_OCMode_PWM1,TIM_OCPolarity_High,0); TIM_DMACmd(PWM_TIM, TIM_DMA_CC3, ENABLE);//TIM_CH3 比较捕获启动DMA传送 StdSetDMA(DMA1_Channel2,(u32)&(TIM3->ARR), (u32)&send_buf, size,DMA_Mode_Normal); DMA_ITConfig(DMA_CHANNEL, DMA_IT_TC, ENABLE);//DMA1传输完成产生DMA中断 DMA_ClearFlag(DMA1_FLAG_TC2);//清满标志 DMA_ClearITPendingBit(DMA1_IT_TC2); StdSetNVIC(DMA1_Channel2_IRQn,2,1); BACKUP_DMA_ISR(); } void DMA_START(void) { DMA_SET(); for(i = 0; i < size-1; ++i) { send_buf[i] = ( 1000 + 20 * i ) - 1; } send_buf[size - 1] = 0; DMA_Cmd(DMA1_Channel2, ENABLE); TIM_Cmd(TIM3, ENABLE); TIM3->CCR3 = 500; } void DMA_Again(void) { DMA_Cmd( DMA_CHANNEL, DISABLE); TIM_Cmd(PWM_TIM,DISABLE); //delay_ms(10); //while( DMA_GetCmdStatus( DMA_CHANNEL ) != DISABLE ); // DMA1->HIFCR |= 0x8000000; //清除发送完成标志 //DMA_ClearITPendingBit( DMA_CHANNEL, DMA_IT_TCIF7); //清除发送完成标志 //DMA_ClearITPendingBit(DMA1_IT_TC2); //DMA_ClearFlag(DMA1_FLAG_TC2); //DMA_CHANNEL->CPAR = (u32)&(PWM_TIM->ARR); //DMA_CHANNEL->CMAR = (u32)&send_buf; //DMA_SetCurrDataCounter( DMA_CHANNEL, size); RESTORE_DMA_ISR(); //PWM_TIM->ARR = 999; //PWM_TIM->CCR3 = 500; PWM_TIM->CNT = 0; PWM_TIM->EGR |= 0x1000; DMA_Cmd( DMA_CHANNEL, ENABLE); TIM_Cmd(PWM_TIM,ENABLE); } void BACKUP_DMA_ISR(void) { //中断状态寄存器 DMA_ISR_COPY = DMA1->ISR; //中断状态标志清除寄存器 //u32 BACKUP_DMA_DMA_IFCR = DMA1->IFCR; } void RESTORE_DMA_ISR(void) { DMA1->ISR = DMA_ISR_COPY; }