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完整程序源代碼工程文件下載地址：
使用DMA功能自動(dòng)更新PWM的輸出.RAR
(253.23 KB, 下載次數(shù): 181)
2015-5-27 17:41 上傳
點(diǎn)擊文件名下載附件
下載積分: 黑幣 -5
- /*******************************************************************************
- 編譯環(huán)境: EWARM V5.30
- 硬件環(huán)境: DZY2.PCB
- STM32 FW: V3.0.0
- 作者 : szlihongtao
- ******************************************************************************
- REV : V1.00
- DATE : 2017-04-18
- NOTE :
- *******************************************************************************/
- #include "stm32f10x.h"
- #include "stm32_m.h"
- #include "dzy.h"
- #include "myRCC.h"
- //******************************************************************************
- #define TIM1_CCR3_Address 0x40012C3C
- bit f_tb; // 基本定時(shí)標(biāo)志
- bit f_100ms,f_1000ms;
- INT16U cnt_test; // 計(jì)數(shù)器，僅供軟件調(diào)試使用
- float clk_sys; // 僅供軟件調(diào)試使用
- #if 0
- uint16_t SRC_Buffer[]={72*5};// 由于載波頻率取20kHZ，所以最大脈沖寬度不要超50us,即常數(shù)不要超過72*50
- #else
- uint16_t SRC_Buffer[]={72*2,72*5,72*10,72*20,72*40,72*10};// 由于載波頻率取20kHZ，所以最大脈沖寬度不要超50us,即常數(shù)不要超過72*50
- #endif
- //******************************************************************************
- // 延時(shí)程序，單位為*1ms
- //******************************************************************************
- void delayms(INT16U cnt)
- {
- //#define CONST_1MS 7333 // 72MhZ
- //#define CONST_1MS 3588 // 32MhZ
- #define CONST_1MS (105*FCLK)
-
- INT16U i;
- __no_operation();
- while(cnt--)
- for (i=0; i<CONST_1MS; i++);
- }
- //******************************************************************************
- // pcb上的指示燈
- //******************************************************************************
- static void led_toggle(void)
- {
- GPIOC->ODR ^= GPIO_Pin_7; // led2 toogle
- GPIOC->ODR ^= GPIO_Pin_6; // led3 toogle
- }
- //******************************************************************************
- // 時(shí)鐘設(shè)置初始化
- //******************************************************************************
- static void RCC_Configuration(void)
- {
- ErrorStatus HSEStartUpStatus;
- /*
- RCC_AdjustHSICalibrationValue 調(diào)整內(nèi)部高速晶振（HSI）校準(zhǔn)值
- RCC_ITConfig 使能或者失能指定的RCC中斷
- RCC_ClearFlag 清除RCC的復(fù)位標(biāo)志位
- RCC_GetITStatus 檢查指定的RCC中斷發(fā)生與否
- RCC_ClearITPendingBit 清除RCC的中斷待處理位
- */
- /* RCC system reset(for debug purpose) */
- // 時(shí)鐘系統(tǒng)復(fù)位
- RCC_DeInit();
- // 使能外部的8M晶振
- // 設(shè)置外部高速晶振（HSE）
- /* Enable HSE */
- RCC_HSEConfig(RCC_HSE_ON);
- // 使能或者失能內(nèi)部高速晶振（HSI）
- RCC_HSICmd(DISABLE);
- // 等待HSE起振
- // 該函數(shù)將等待直到HSE就緒，或者在超時(shí)的情況下退出
- /* Wait till HSE is ready */
- HSEStartUpStatus = RCC_WaitForHSEStartUp();
- if(HSEStartUpStatus == SUCCESS)
- {
- // 設(shè)置AHB時(shí)鐘（HCLK）
- RCC_HCLKConfig(RCC_HCLK_Div_); // 36 MHz
- // 設(shè)置低速AHB時(shí)鐘（PCLK1）
- RCC_PCLK1Config(RCC_PCLK1_Div_); // 2.25 MHz
- // 設(shè)置高速AHB時(shí)鐘（PCLK2）
- RCC_PCLK2Config(RCC_PCLK2_Div_); // 2.25 MHz
- /* ADCCLK = PCLK2/8 */
- // 設(shè)置ADC時(shí)鐘（ADCCLK）
- RCC_ADCCLKConfig(RCC_ADC_DIV_); // 0.281Mhz
- // 設(shè)置USB時(shí)鐘（USBCLK）
- // USB時(shí)鐘 = PLL時(shí)鐘除以1.5
- //RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);
- // 設(shè)置外部低速晶振（LSE）
- RCC_LSEConfig(RCC_LSE_OFF);
- // 使能或者失能內(nèi)部低速晶振（LSI）
- // LSE晶振OFF
- RCC_LSICmd(DISABLE);
- // 設(shè)置RTC時(shí)鐘（RTCCLK）
- // 選擇HSE時(shí)鐘頻率除以128作為RTC時(shí)鐘
- //RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div128);
- // 使能或者失能RTC時(shí)鐘
- // RTC時(shí)鐘的新狀態(tài)
- RCC_RTCCLKCmd(DISABLE);
- /* Flash 2 wait state */
- FLASH_SetLatency(FLASH_Latency_2);
- /* Enable Prefetch Buffer */
- FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
- /* PLLCLK = 8MHz * 9 = 72 MHz */
- // 設(shè)置PLL時(shí)鐘源及倍頻系數(shù)
- RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_);
-
- /* Enable PLL */
- // 使能或者失能PLL
- RCC_PLLCmd(ENABLE);
- /* Wait till PLL is ready */
- // 檢查指定的RCC標(biāo)志位設(shè)置與否
- while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
- {
- }
- /* Select PLL as system clock source */
- // 設(shè)置系統(tǒng)時(shí)鐘（SYSCLK）
- RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
- /* Wait till PLL is used as system clock source */
- // 返回用作系統(tǒng)時(shí)鐘的時(shí)鐘源
- while(RCC_GetSYSCLKSource() != 0x08)
- {
- }
- }
- // 使能或者失能AHB外設(shè)時(shí)鐘
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1
- |RCC_AHBPeriph_DMA2
- |RCC_AHBPeriph_SRAM
- |RCC_AHBPeriph_FLITF
- |RCC_AHBPeriph_CRC
- |RCC_AHBPeriph_FSMC
- |RCC_AHBPeriph_SDIO,DISABLE);
- // 使能或者失能APB1外設(shè)時(shí)鐘
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_ALL,DISABLE);
- // 強(qiáng)制或者釋放高速APB（APB2）外設(shè)復(fù)位
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_ALL,ENABLE);
- // 退出復(fù)位狀態(tài)
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_ALL,DISABLE);
- // 強(qiáng)制或者釋放低速APB（APB1）外設(shè)復(fù)位
- RCC_APB1PeriphResetCmd(RCC_APB1Periph_ALL,ENABLE);
- // 強(qiáng)制或者釋放后備域復(fù)位
- RCC_BackupResetCmd(ENABLE);
- // 使能或者失能時(shí)鐘安全系統(tǒng)
- RCC_ClockSecuritySystemCmd(DISABLE);
- }
- //******************************************************************************
- // NVIC設(shè)置
- //******************************************************************************
- void NVIC_Configuration(void)
- {
- NVIC_InitTypeDef NVIC_InitStructure;
- /* Configure one bit for preemption priority */
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
- NVIC_InitStructure.NVIC_IRQChannel=TIM1_UP_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- //NVIC_Init(&NVIC_InitStructure);
- NVIC_InitStructure.NVIC_IRQChannel=TIM1_CC_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- //NVIC_Init(&NVIC_InitStructure);
-
- NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel5_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- }
- //******************************************************************************
- // SysTick設(shè)置初始化
- //******************************************************************************
- static void SysTick_Config1(void)
- {
- #if 1
- #define SystemFreq (FCLK*1000000.0) // 單位為Hz
- #define TB_SysTick (TIME_TB*1000) // 單位為uS,與示波器實(shí)測一致
- static INT32U ticks;
- ticks=(INT32U)((TB_SysTick/1000000.0)*SystemFreq);
- SysTick_Config(ticks);
- #endif
- }
- //******************************************************************************
- // GPIO設(shè)置
- //******************************************************************************
- static void GPIO_Configuration(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA
- |RCC_APB2Periph_GPIOB
- |RCC_APB2Periph_GPIOC
- |RCC_APB2Periph_GPIOD
- |RCC_APB2Periph_AFIO, ENABLE);
- //------------------------------------------------------------------------------
- GPIO_Write(GPIOA,0xffff);
-
- /* GPIOA Configuration: Channel 3 as alternate function push-pull */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- // GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- //------------------------------------------------------------------------------
- GPIO_Write(GPIOB,0xffff); // 11111101-11111111
-
- /* GPIOB Configuration: Channel 3N as alternate function push-pull */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- //------------------------------------------------------------------------------
-
- GPIO_Write(GPIOC,0xff0f); // 11111111-00001111
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_6|GPIO_Pin_4|GPIO_Pin_5;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_Init(GPIOC, &GPIO_InitStructure);
- //------------------------------------------------------------------------------
- GPIO_Write(GPIOD,0xffff); // 11111111-11111111
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_Init(GPIOD, &GPIO_InitStructure);
- }
- //******************************************************************************
- void DMA_Configuration(void)
- {
- DMA_InitTypeDef DMA_InitStructure;
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE); // dma1時(shí)鐘使能
-
- DMA_DeInit(DMA1_Channel5); // DMA復(fù)位
- DMA_StructInit(&DMA_InitStructure);// DMA缺省的參數(shù)
- DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)TIM1_CCR3_Address; //外設(shè)地址
- DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SRC_Buffer;//內(nèi)存地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //dma傳輸方向,單向
- DMA_InitStructure.DMA_BufferSize = sizeof(SRC_Buffer)/2; //設(shè)置DMA在傳輸時(shí)緩沖區(qū)的長度
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//設(shè)置DMA的外設(shè)遞增模式，一個(gè)外設(shè)
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//設(shè)置DMA的內(nèi)存遞增模式，
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外設(shè)數(shù)據(jù)字長
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //內(nèi)存數(shù)據(jù)字長
- //循環(huán)模式開啟，Buffer寫滿后，自動(dòng)回到初始地址開始傳輸
- DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //設(shè)置DMA的傳輸模式
- DMA_InitStructure.DMA_Priority = DMA_Priority_High; //設(shè)置DMA的優(yōu)先級(jí)別
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //設(shè)置DMA的2個(gè)memory中的變量互相訪問
- DMA_Init(DMA1_Channel5, &DMA_InitStructure);
- DMA_ClearFlag(DMA1_IT_TC5);
- DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
- DMA_Cmd(DMA1_Channel5, ENABLE);
- }
-
- /* TIM1 DMA Transfer example -------------------------------------------------
- TIM1CLK = 72 MHz, Prescaler = 0, TIM1 counter clock = 72 MHz
- The TIM1 Channel3 is configured to generate a complementary PWM signal with
- a frequency equal to: TIM1 counter clock / (TIM1_Period + 1) = 17.57 KHz and
- a variable duty cycle that is changed by the DMA after a specific number of
- Update DMA request.
- The number of this repetitive requests is defined by the TIM1 Repetion counter,
- each 3 Update Requests, the TIM1 Channel 3 Duty Cycle changes to the next new
- value defined by the SRC_Buffer .
- -----------------------------------------------------------------------------*/
- //******************************************************************************
- void Tim1_Configuration(void)
- {
- INT16U TIM_Prescaler,TIM_Period;
- INT32U utemp;
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- TIM_OCInitTypeDef TIM_OCInitStructure;
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
-
- TIM_DeInit(TIM1);
-
- utemp=(INT32U)(TIM1CLK*1000000.0)/Freq_PWM;
- TIM_Prescaler=utemp/65536;
- ++TIM_Prescaler; // 注意這句話，一定要++
-
- utemp=(INT32U)(TIM1CLK*1000000.0)/TIM_Prescaler; // 分頻后的定時(shí)器輸入頻率
- TIM_Period=utemp/Freq_PWM; // 周期常數(shù)
-
- TIM_TimeBaseStructure.TIM_Period = TIM_Period-1;
- TIM_TimeBaseStructure.TIM_Prescaler = TIM_Prescaler-1;
- TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
- TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
- TIM_TimeBaseStructure.TIM_RepetitionCounter = 1-1;// 每次直接更新
- TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
- //------------------------------------------------------------------------------
- /* PWM1 Mode configuration: Channel1 */
- TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
- TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; // 使能輸出比較狀態(tài)
- TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; // 失能輸出比較N狀態(tài)
- TIM_OCInitStructure.TIM_Pulse = 72;
- /*
- TIM_OCMode_PWM2 TIM_OCPolarity_Low 正脈沖模式
- TIM_OCMode_PWM2 TIM_OCPolarity_High 負(fù)脈沖模式
- TIM_OCMode_PWM1 TIM_OCPolarity_Low 負(fù)脈沖模式
- TIM_OCMode_PWM1 TIM_OCPolarity_High 正脈沖模式
- TIM1_OCPolarity輸出極性---TIM_OCPolarity_High，輸出比較極性高,輸出的是正脈沖
- TIM1_OCPolarity輸出極性---TIM_OCPolarity_Low， 輸出比較極性低,輸出的是負(fù)脈沖
- */
- TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
- TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; // 互補(bǔ)輸出極性
- // 選擇空閑狀態(tài)下的非工作狀態(tài)
- // 當(dāng)MOE=0設(shè)置TIM1輸出比較空閑狀態(tài)
- // 默認(rèn)輸出位低電平
- TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
- // 選擇空閑狀態(tài)下的非工作狀態(tài)
- // 當(dāng)MOE=0重置TIM1輸出比較N空閑狀態(tài)
- TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
- TIM_OC3Init(TIM1, &TIM_OCInitStructure);
- TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);// 使能TIMx在CCR1上的預(yù)裝載寄存器
- /* TIM1 Update DMA Request enable */
- TIM_DMACmd(TIM1, TIM_DMA_Update, ENABLE);
- //TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE); // 定時(shí)中斷使能
- //TIM_ITConfig(TIM1,TIM_IT_CC3,ENABLE); // 定時(shí)中斷使能
- TIM_Cmd(TIM1, ENABLE); // 定時(shí)器開始運(yùn)行
-
- // 這條語句必須要有!!!
- TIM_CtrlPWMOutputs(TIM1, ENABLE); /* Main Output Enable */
- }
- //******************************************************************************
- // 基本定時(shí)程序,周期為 TIME_TB
- //******************************************************************************
- static func_tb(void)
- {
- static INT16U tmr_100ms;
- static INT16U tmr_1000ms;
-
- if (!f_tb)
- return;
- f_tb=0;
-
- if (++tmr_100ms>=(100/TIME_TB))
- {
- tmr_100ms=0;
- f_100ms=1;
-
- GPIOC->ODR ^= GPIO_Pin_4; // led5 toogle
- }
- if (++tmr_1000ms>=(1000/TIME_TB))
- {
- tmr_1000ms=0;
- f_1000ms=1;
- GPIOC->ODR ^= GPIO_Pin_5; // led4 toogle
- }
- }
- //******************************************************************************
- // 進(jìn)入睡眠模式
- // 自行編寫
- //******************************************************************************
- void myPWR_EnterSleepMode(void)
- {
- //PWR->CR |= CR_CWUF_Set; /* Clear Wake-up flag */
- /* Set SLEEPDEEP bit of Cortex System Control Register */
- //*(__IO uint32_t *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set;
- /* This option is used to ensure that store operations are completed */
- __WFI(); /* Request Wait For Interrupt */
- }
- //******************************************************************************
- // 主程序
- //******************************************************************************
- void main(void)
- {
- int i;
-
- RCC_Configuration();
- GPIO_Configuration();
- delayms(100); // 延時(shí)，等待電壓穩(wěn)定
- Tim1_Configuration();
- DMA_Configuration();
- SysTick_Config1();
- NVIC_Configuration();
- //------------------------------------------------------------------------------
- for(i=0;i<6;++i)
- {
- //i=0;
- //GPIOA->ODR ^= GPIO_Pin_10; // led3 toogle
- //GPIOA->ODR ^= GPIO_Pin_11; // led3 toogle
-
- delayms(1);
- led_toggle();
- }
- //------------------------------------------------------------------------------
- for(;;)
- {
- //if (set_sw&0x01)
- //myPWR_EnterSleepMode(); // 休眠，降低功耗
- func_tb();
- }
- }
- //******************************************************************************
- #ifdef USE_FULL_ASSERT
- /**
- * @brief Reports the name of the source file and the source line number
- * where the assert_param error has occurred.
- * @param file: pointer to the source file name
- * @param line: assert_param error line source number
- * @retval : None
- */
- void assert_failed(uint8_t* file, uint32_t line)
- {
- /* User can add his own implementation to report the file name and line number,
- ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
- /* Infinite loop */
- while (1)
- {
- }
- }
- #endif
- //******************************************************************************
- /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
- //******************************************************************************
- /*
- LED2---------PC7
- LED3---------PC6
- LED4---------PC5
- LED5---------PC4
- KEY2---------PD3
- KEY3---------PD4
- @par Example Description
- This example provides a description of how to use DMA with TIM1 Update request
- to transfer Data from memory to TIM1 Capture Compare Register3.
- TIM1CLK = 72 MHz, Prescaler = 0, TIM1 counter clock = 72 MHz
- The TIM1 Channel3 is configured to generate a complementary PWM signal with
- a frequency equal to: TIM1 counter clock / (TIM1_Period + 1) = 17.57 KHz
- The TIM1 Channel3 is configured to generate a complementary PWM signal with
- a frequency equal to 17.578 KHz and a variable duty cycle that is changed
- by the DMA after a specific number of Update event.
- The number of this repetitive requests is defined by the TIM1 Repetion counter,
- each 3 Update Requests, the TIM1 Channel3 Duty Cycle changes to the next new value
- defined by the SRC_Buffer.
- - STM3210E-EVAL and STM3210B-EVAL Set-up
- - Connect the following pins to an oscilloscope to monitor the different waveforms:
- - TIM1 CH3 (PA.10) pin69
- - TIM1 CH3N (PB.15) pin54
- */
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