STM32 控制AD9834 输出频率不受控

dashabi520

想让AD9834输出的频率可调，比如每次加10hz，现在是频率不变的情况下，代码放进循环里面波形就不受控

dashabi520

#include"stm32f10x_conf.h"
#define AD9834_SDATA_H GPIO_SetBits(GPIOD,GPIO_Pin_0)
#define AD9834_SDATA_L GPIO_ResetBits(GPIOD,GPIO_Pin_0)
#define AD9834_SCLK_H GPIO_SetBits(GPIOD,GPIO_Pin_1)
#define AD9834_SCLK_L GPIO_ResetBits(GPIOD,GPIO_Pin_1)
#define AD9834_RESET_H GPIO_SetBits(GPIOD,GPIO_Pin_2)
#define AD9834_RESET_L GPIO_ResetBits(GPIOD,GPIO_Pin_2)
#define AD9834_FSYNC_H GPIO_SetBits(GPIOD,GPIO_Pin_3)
#define AD9834_FSYNC_L GPIO_ResetBits(GPIOD,GPIO_Pin_3)

void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void Delay(vu32 nCount);
void AD9834_Write_16Bits(uint16_t data);
void AD9834_Select_Wave(uint16_t initdata);
void AD9834_Set_Freq(uint8_t freq_number, uint32_t freq);
int main(void)
{
  RCC_Configuration();   
  GPIO_Configuration();
  NVIC_Configuration();

  AD9834_Write_16Bits(0x2100);
  AD9834_Write_16Bits(0x2038);
  AD9834_Write_16Bits(0XC000);
  AD9834_Write_16Bits(0x2100);
  AD9834_Select_Wave(0x2028);
  AD9834_Set_Freq(0,15000000); //Set the output frequency of 15MHz
  while (1)
  {
  }
}


void AD9834_Write_16Bits(uint16_t data)
{
  uint8_t i = 0 ;
  AD9834_SCLK_H;
  AD9834_FSYNC_L;
  for(i=0 ;i<16 ;i++)      
  {
    if(data & 0x8000)
    AD9834_SDATA_H;
    else
    AD9834_SDATA_L;
    AD9834_SCLK_L;
    data <<= 1 ;
    AD9834_SCLK_H;
  }
  AD9834_SDATA_H;
  AD9834_FSYNC_H;
}

void AD9834_Select_Wave(uint16_t initdata)
{
  AD9834_FSYNC_H;
  AD9834_SCLK_H;
  AD9834_RESET_H;
  AD9834_RESET_L;
  AD9834_Write_16Bits(initdata);
}


void AD9834_Set_Freq(uint8_t freq_number, uint32_t freq)
{
    uint32_t FREQREG = (uint32_t)(268435456.0/75000000*freq);
    uint16_t FREQREG_LSB_14BIT = (uint16_t)FREQREG;
    uint16_t FREQREG_MSB_14BIT = (uint16_t)(FREQREG>>14);
    if(freq_number == 0)
    {
        FREQREG_LSB_14BIT &= ~(1U<<15);
        FREQREG_LSB_14BIT |= 1<<14;
        FREQREG_MSB_14BIT &= ~(1U<<15);
        FREQREG_MSB_14BIT |= 1<<14;
    }
    else
    {
        FREQREG_LSB_14BIT &= ~(1<<14);
        FREQREG_LSB_14BIT |= 1U<<15;
        FREQREG_MSB_14BIT &= ~(1<<14);
        FREQREG_MSB_14BIT |= 1U<<15;
    }
    AD9834_Write_16Bits(FREQREG_LSB_14BIT);
    AD9834_Write_16Bits(FREQREG_MSB_14BIT);      
}

void RCC_Configuration(void)
{   
  ErrorStatus HSEStartUpStatus;
  RCC_DeInit();
  RCC_HSEConfig(RCC_HSE_ON);
  HSEStartUpStatus = RCC_WaitForHSEStartUp();
  if(HSEStartUpStatus == SUCCESS)
  {
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    FLASH_SetLatency(FLASH_Latency_2);
    RCC_HCLKConfig(RCC_SYSCLK_Div1);  
    RCC_PCLK2Config(RCC_HCLK_Div1);  
    RCC_PCLK1Config(RCC_HCLK_Div2);
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
    RCC_PLLCmd(ENABLE);
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) { }
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
    while(RCC_GetSYSCLKSource() != 0x08) { }
  }
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOD, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}


void NVIC_Configuration(void)
{
#ifdef  VECT_TAB_RAM   
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);  
#else
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   
#endif
}

void Delay(vu32 nCount)
{
  for(; nCount != 0; nCount--);
}

#ifdef  DEBUG
void assert_failed(u8* file, u32 line)
{  
  while (1) { }
}
#endif

1208

仿真看看循环里面哪里影响到了