AD5420为嘛没输出（STM32）

sailorx 提问时间：2016-12-6 22:09 /

大家帮看看，到底哪出问题了，折腾一周有余了。AD5420驱动代码如下：
#include "stm32f10x.h"
#include "SPI1.H"

void for_delay(u32 delay_time)
{
u32 i=0;
for(i=0; i<delay_time;i++);
}

/*******************************************************************************
* º¯ÊýÃû³Æ: SPI_COM_Init()
* ¹¦ÄÜÃèÊö: SPI³õÊ¼»¯ ¸ù¾Ýºê¶¨Òå½øÐÐÑ¡Ôñ--Í¨³£ÊÇSPI1
* ÊäÈë²ÎÊý: void
* ·µ»Ø²ÎÊý: ÎÞ
********************************************************************************/
void SPI_GPIO_Init(void)
{

  //    SPI_InitTypeDef  SPI_InitStructure;
      GPIO_InitTypeDef  GPIO_InitStructure;

      /* Enable SPI1 and GPIO clocks */
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
      /*!< SPI_FLASH_SPI Periph clock enable */
//       RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

         /*!< Configure SPI pins: SCK */
          GPIO_InitStructure.GPIO_Pin = SPI_SCK_PIN|SPI_MOSI_PIN;
      GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

          /*!< Configure AD5420 latch */
      GPIO_InitStructure.GPIO_Pin =  SPI1_CS ;
      GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);
      GPIO_SetBits(GPIOA,SPI1_CS);

}
/********************************************************
º¯ÊýÃû³Æ£º miran_spi1_init
¹¦ÄÜÃèÊö:  ³õÊ¼»¯SPI1
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********************************************************/
void miran_spi1_init(void)
{
SPI_InitTypeDef SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

SPI_Cmd(SPI1, DISABLE);
SPI_I2S_DeInit(SPI1);

/* SPIy Config -------------------------------------------------------------*/
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE);
}

/********************************************************
º¯ÊýÃû³Æ£º SPI1_SEND_DATA
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²ÎÊýËµÃ÷£º data Òª·¢ËÍµÄÊý¾ÝÖµ
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********************************************************/
void SPI1_SEND_DATA(u8 data)
{
SPI_I2S_SendData(SPI1, data);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);

}

/********************************************************
º¯ÊýÃû³Æ£º ADC5420_WRITE_DATA
¹¦ÄÜÃèÊö:  ÅäÖÃ¼Ä´æÆ÷
²ÎÊýËµÃ÷£º regist ¼Ä´æÆ÷µØÖ·,  data Êý¾Ý
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********************************************************/
void ADC5420_WRITE_DATA(u8 regist, u16 data)
{
// GPIO_ResetBits(GPIOA, SPI1_CS);    //cs  ÖÃµÍ
// SPI1_SEND_DATA(regist); //5420 ¼Ä´æÆ÷µØÖ·
// SPI1_SEND_DATA(data>>8); //¸ß×Ö½Ú
// SPI1_SEND_DATA(data); //µÍ×Ö½Ú
//
// for_delay(100);
// GPIO_SetBits(GPIOA, SPI1_CS);    //cs  ÖÃ¸ß
unsigned char  data_low,data_high;
data_low = data &0xFF;
data_high = (data >>8) &0xff;
GPIO_SetBits(GPIOA, SPI1_CS);
for_delay(40);
SPI1_SEND_DATA(regist); //5420 ¼Ä´æÆ÷µØÖ·
SPI1_SEND_DATA(data_high); //¸ß×Ö½Ú
SPI1_SEND_DATA(data_low); //µÍ×Ö½Ú
GPIO_ResetBits(GPIOA, SPI1_CS);
for_delay(100);
GPIO_SetBits(GPIOA, SPI1_CS);    //cs  ÖÃ¸ß
}

/********************************************************
º¯ÊýÃû³Æ£º ADC5420_init
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********************************************************/
void ADC5420_init()
{
ADC5420_WRITE_DATA(0X56,0X0001);
for_delay(100);
ADC5420_WRITE_DATA(0X55,0X2015);
ADC5420_WRITE_DATA(0X55,0X1000);
ADC5420_WRITE_DATA(0X01,0X1166);

}

/********************************************************
º¯ÊýÃû³Æ£º ADC5420_RECIVE_DATA
¹¦ÄÜÃèÊö:  ¶ÁADC5420¶ÔÓ¦µÄ¼Ä´æÆ÷Öµ
²ÎÊýËµÃ÷£º SPIx SPI½Ó¿Ú,  regist  ÐèÒª¶Á5420µÄ¼Ä´æÆ÷µØÖ·±àºÅ
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********************************************************/
u32 ADC5420_RECIVE_DATA(SPI_TypeDef* SPIx, u8 regist)
{
u32 data=0;

GPIO_ResetBits(GPIOA, SPI1_CS);    //cs  ÖÃµÍ
for_delay(5);
SPI1_SEND_DATA(0x02);
SPI1_SEND_DATA(0X00);
SPI1_SEND_DATA(regist);
for_delay(100);
GPIO_SetBits(GPIOA, SPI1_CS);    //cs  ÖÃ¸ß
for_delay(50);

GPIO_ResetBits(GPIOA, SPI1_CS);    //cs  ÖÃµÍ
SPI1_SEND_DATA(0X00);
for_delay(150);
data|= (SPI_I2S_ReceiveData(SPIx)&0x00FF)<<16;
SPI1_SEND_DATA(0X00);
for_delay(150);
data|= (SPI_I2S_ReceiveData(SPIx)&0x00FF)<<8;
SPI1_SEND_DATA(0X00);
for_delay(150);
data|= (SPI_I2S_ReceiveData(SPIx)&0x00FF);
data=data&0x00ffff;
for_delay(100);
GPIO_SetBits(GPIOA, SPI1_CS);    //cs  ÖÃ¸ß

for_delay(150);
return data;
}

/********************************************************
º¯ÊýÃû³Æ£º Ma_to_ADC5420
¹¦ÄÜÃèÊö:  °ÑMAÖµ×ª»»³ÉÒªÊäÈëµÄADCÖµ
²ÎÊýËµÃ÷£º MAÖµ ·¶Î§4~20
·µ»ØËµÃ÷£º ¶ÔÓ¦µÄADCÖµ
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********************************************************/
u16 Ma_to_ADC5420(float MA)
{
u16 adc=0;

adc=(u16)(((MA)*65535)/24); //  (((MA)*65535)/24)    (((MA-4)*65535)/16)

return adc;
}

/********************************************************
º¯ÊýÃû³Æ£ºADC5420_CLEAR
¹¦ÄÜÃèÊö:  CLEARÎª¸ßµçÆ½ÓÐÐ§ÇåÁã£¬Êä³öµçÁ÷ÇåÁãÖÁ±à³Ì·¶Î§µÄµ×²¿
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********************************************************/
void ADC5420_CLEAR(void)
{
GPIO_SetBits(GPIOA, CLEAR);
for_delay(50000);
GPIO_ResetBits(GPIOA, CLEAR);
}

main函数如下：
int main(void)
{
  Stm32_Clock_Init(9);
  delay_init(72);
  LED_GPIO_Config();
  SPI_GPIO_Init();
  miran_spi1_init();
  ADC5420_init();

  while (1)
  {
   Ma_to_ADC5420(10.00);

  }
}

AD5420çµè·¯