DAC1为什么不听timer2的话?

sharon

extern uint32_t DAC_DHR12RD_Address ; 
extern uint32_t DAC_DHR12R1_Address ; 
extern uint32_t DAC_DHR12R2_Address ; 

extern uint16_t Sine12bit[32];
extern uint16_t Sine12bit2[32];
extern uint32_t DualSine12bit[32];

/************************************************************************************
*名称：void DAC_Configuration(void)
*参数：无
*返回：无
*功能：DAC初始化
************************************************************************************/

void DAC_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DAC_InitTypeDef DAC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC ,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO,ENABLE);   

/*-----------DAC端口配置 复用输出模式-------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA ,&GPIO_InitStructure);

DAC_DeInit();  /*还原到初始状态*/

DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;       /*TIMER2触发*/
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;   /*自定义波形产生*/
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;   /*失能输出缓冲*/
DAC_Init(DAC_Channel_1, &DAC_InitStructure);

DAC_Cmd(DAC_Channel_1,  ENABLE);
DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);

DAC_InitStructure.DAC_Trigger = DAC_Trigger_T7_TRGO;     
DAC_Init(DAC_Channel_2, &DAC_InitStructure);

DAC_Cmd(DAC_Channel_2,  ENABLE);
DAC_SoftwareTriggerCmd(DAC_Channel_2, ENABLE);
}

/************************************************************************************
*名称：void TIMER_Configuration(void)
*参数：无
*返回：无
*功能：TIMER初始化
************************************************************************************/

void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM7,ENABLE);

TIM_DeInit(TIM2);
TIM_DeInit(TIM7);

TIM_TimeBaseStructure.TIM_Period =0x0F;         /*改变这个值改变正弦波的频率*/     
TIM_TimeBaseStructure.TIM_Prescaler = 0x0;          
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;   
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

TIM_Cmd(TIM2, ENABLE);

TIM_TimeBaseStructure.TIM_Period =0x0FFF; 
TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure);

TIM_SelectOutputTrigger(TIM7, TIM_TRGOSource_Update);

TIM_Cmd(TIM7, ENABLE);
}

/************************************************************************************
*名称：void DMA_Configuration(void)
*参数：无
*返回：无
*功能：DMA初始化
************************************************************************************/

void DMA_Configuration(void)
{

DMA_InitTypeDef DMA_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2 ,ENABLE);

DAC_Cmd(DAC_Channel_1, ENABLE);
DAC_Cmd(DAC_Channel_2, ENABLE);

DMA_DeInit(DMA2_Channel4); /*DAC2使用DAM通道4*/
DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12RD_Address;  /*双DAC数据寄存器地址*/
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit;  /*待送入DAC的数字量*/
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA2_Channel4, &DMA_InitStructure);

DMA_Cmd(DMA2_Channel4, ENABLE);

DAC_DMACmd(DAC_Channel_2, ENABLE);
}











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 uint16_t Sine12bit2[32] = {
                      0, 100, 200, 300, 400, 500, 600, 700, 800, 900,
                      1000,1100, 1200, 1300, 1400, 1500, 1400, 1300, 1200, 1100, 
                     1000, 900, 800, 700,600, 500, 400, 300, 200,100};
*/
 
 
const uint16_t Sine12bit2[32] = {
                      
                      4095,4095,4095,4095,4095,4095,4095,4095,4095,4095,4095,4095,4095,4095,4095, 4095,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 
/* const uint16_t Sine12bit2[32] = {4095,2080,1950,1820,1690,1560,1430,1300,1170,1040,910,780,650,520,390,260,130,0}; */  
 
/************************************************************************************
*名称：int main(void)
*参数：无
*返回：无
*功能：主函数
************************************************************************************/

int main(void)
{

uint8_t cont;

for (cont= 0; cont< 32; cont++)
{
DualSine12bit[cont] = (Sine12bit2[cont] << 16) + (Sine12bit[cont]);
}

SystemInit();    
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
DMA_Configuration();
TIM_Configuration();
DAC_Configuration();

while (1)
{
}
}

正点原子

帮顶。。。。