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使用库文件的Demo程序，配合ST官方Demo板， 下载库文件的Demo程序，发送使用DMA时，DAC没有输出， 反复修改， 最后将两个DAC都配置成Stream5 Chanel7 两个通道都正常输出， 但是数据手册了上DAC2应该是Sream6 Channel7, 根据手册配置的话 DAC1和DAC2 都没有输出 这是怎么回事， 下边是我的源程序 /** ****************************************************************************** * @file DAC_SignalsGeneration/main.c * @author MCD Application Team * @version V1.0.0 * @date 19-September-2011 * @brief Main program body. ****************************************************************************** * @attention * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f4_discovery.h" /** @addtogroup STM32F4_Discovery_Peripheral_Examples * @{ */ /** @addtogroup DAC_SignalsGeneration * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define DAC_DHR12R2_ADDRESS 0x40007414 #define DAC_DHR8R1_ADDRESS 0x40007410 /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ DAC_InitTypeDef DAC_InitStructure; const uint16_t Sine12bit[32] = { 2047, 2447, 2831, 3185, 3498, 3750, 3939, 4056, 4095, 4056, 3939, 3750, 3495, 3185, 2831, 2447, 2047, 1647, 1263, 909, 599, 344, 155, 38, 0, 38, 155, 344, 599, 909, 1263, 1647}; const uint8_t Escalator8bit[6] = {0x0,0X11,0X22,0X33,0X44,0xFF}; __IO uint8_t SelectedWavesForm = 1; __IO uint8_t KeyPressed = SET; /* Private function prototypes -----------------------------------------------*/ void TIM6_Config(void); void DAC_Ch1_EscalatorConfig(void); void DAC_Ch2_SineWaveConfig(void); void DAC_Ch1_NoiseConfig(void); void DAC_Ch2_TriangleConfig(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32f4xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32f4xx.c file */ /* Preconfiguration before using DAC----------------------------------------*/ GPIO_InitTypeDef GPIO_InitStructure; /* DMA1 clock and GPIOA clock enable (to be used with DAC) */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1 | RCC_AHB1Periph_GPIOA, ENABLE); /* DAC Periph clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); /* DAC channel 1 & 2 (DAC_OUT1 = PA.4)(DAC_OUT2 = PA.5) configuration */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStructure); /* TIM6 Configuration ------------------------------------------------------*/ TIM6_Config(); /* Configures User Button */ STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI); DAC_Ch1_EscalatorConfig(); /* Sine Wave generator -----------------------------------------------*/ DAC_Ch2_SineWaveConfig(); while (1) { /* If the User Button is pressed */ if (KeyPressed == RESET) { DAC_DeInit(); } /* select waves forms according to the Key Button status */ if (SelectedWavesForm == 1) //SelectedWavesForm 已经设置成1 { /* The sine wave and the escalator wave has been selected */ // DAC_Ch1_EscalatorConfig(); ==========注释掉这部分，移动到while (1)前 /* Escalator Wave generator ------------------------------------------*/ // DAC_Ch2_SineWaveConfig();==========注释掉这部分，移动到while (1)前 } else { /* The triangle wave and the noise wave has been selected */ /* Noise Wave generator ----------------------------------------------*/ //DAC_Ch1_NoiseConfig(); /* Triangle Wave generator -------------------------------------------*/ DAC_Ch2_TriangleConfig(); } KeyPressed = SET; } } /** * @brief TIM6 Configuration * @note TIM6 configuration is based on CPU @168MHz and APB1 @42MHz * @note TIM6 Update event occurs each 37.5MHz/256 = 16.406 KHz * @param None * @retval None */ void TIM6_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; /* TIM6 Periph clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE); /* Time base configuration */ TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); TIM_TimeBaseStructure.TIM_Period = 0xFF; TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure); /* TIM6 TRGO selection */ TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update); /* TIM6 enable counter */ TIM_Cmd(TIM6, ENABLE); } /** * @brief DAC Channel2 SineWave Configuration * @param None * @retval None */ void DAC_Ch2_SineWaveConfig(void) { DMA_InitTypeDef DMA_InitStructure; /* DAC channel2 Configuration */ DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO; DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; DAC_Init(DAC_Channel_2, &DAC_InitStructure); //这部分注释应该有问题，手册上DAC2对应Stream6 Channel7 /* DMA1_Stream5 channel7 configuration **************************************/ DMA_DeInit(DMA1_Stream5); DMA_InitStructure.DMA_Channel = DMA_Channel_7; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)DAC_DHR12R2_ADDRESS; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Sine12bit; DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; DMA_InitStructure.DMA_BufferSize = 32; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA1_Stream5, &DMA_InitStructure); /* Enable DMA1_Stream5 */ DMA_Cmd(DMA1_Stream5, ENABLE); /* Enable DAC Channel2 */ DAC_Cmd(DAC_Channel_2, ENABLE); /* Enable DMA for DAC Channel2 */ DAC_DMACmd(DAC_Channel_2, ENABLE); } /** * @brief DAC Channel1 Escalator Configuration * @param None * @retval None */ void DAC_Ch1_EscalatorConfig(void) { DMA_InitTypeDef DMA_InitStructure; /* DAC channel1 Configuration */ DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO; DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; DAC_Init(DAC_Channel_1, &DAC_InitStructure); //这部分注释应该有问题，手册上DAC2对应Stream5 Channel7 /* DMA1_Stream6 channel7 configuration **************************************/ DMA_DeInit(DMA1_Stream5); DMA_InitStructure.DMA_Channel = DMA_Channel_7; DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_ADDRESS; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Escalator8bit; DMA_InitStructure.DMA_BufferSize = 6; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA1_Stream6, &DMA_InitStructure); /* Enable DMA1_Stream6 */ DMA_Cmd(DMA1_Stream6, ENABLE); /* Enable DAC Channel1 */ DAC_Cmd(DAC_Channel_1, ENABLE); /* Enable DMA for DAC Channel1 */ DAC_DMACmd(DAC_Channel_1, ENABLE); } /** * @brief DAC Channel2 Triangle Configuration * @param None * @retval None */ void DAC_Ch2_TriangleConfig(void) { /* DAC channel2 Configuration */ DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO; DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle; DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1023; DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; DAC_Init(DAC_Channel_2, &DAC_InitStructure); /* Enable DAC Channel2 */ DAC_Cmd(DAC_Channel_2, ENABLE); /* Set DAC channel2 DHR12RD register */ DAC_SetChannel2Data(DAC_Align_12b_R, 0x100); } /** * @brief DAC Channel1 Noise Configuration * @param None * @retval None */ void DAC_Ch1_NoiseConfig(void) { /* DAC channel1 Configuration */ DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO; DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Noise; DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits10_0; DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; DAC_Init(DAC_Channel_1, &DAC_InitStructure); /* Enable DAC Channel1 */ DAC_Cmd(DAC_Channel_1, ENABLE); /* Set DAC Channel1 DHR12L register */ DAC_SetChannel1Data(DAC_Align_12b_L, 0x7FF0); } #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 2011 STMicroelectronics *****END OF FILE****/ |
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