高性能电能计量芯片CS5460

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高性能电能计量芯片CS5460 [复制链接]

最近测试cs5460这款计量芯片有好一段时间了  中间耽误了很久  一直没能正确读取数据
其芯片连接图及负载接线图如下所示
主控芯片 stm32103 c8t6
采用 spi通讯
现测试读取电压电流数据  总是读取不到  读取状态寄存器也是如此
示波器观察主控芯片mosi脚  数据发送正常
检查时序  也未发现问题  程序如下
spi配置
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

/* SPI1 Periph clocks enable */
RCC_APB2PeriphClockCmd (RCC_APB2Periph_SPI1, ENABLE);
/* GPIOB clock enable */
RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOA| RCC_APB2Periph_AFIO, ENABLE);

/* SCK, MISO and MOSI PA5=CLK,PA6=MISO,PA7=MOSI*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* PA4 作片选*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA, GPIO_Pin_4); //预置为高,低电平有效

/* PB10 作复位*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_2);  //预置为高，低电平有效
GPIO_SetBits(GPIOB, GPIO_Pin_10); //预置为高，低电平有效

/* SPI1 configuration */
SPI_Cmd(SPI1, DISABLE);                                           //必须先禁能,才能改变MODE
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //两线全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;    //主
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;    //8位
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;       //CPOL=0 时钟悬空低
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;    //CPHA=0 数据捕获第1个
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;       //软件NSS
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;  //4分频=9M < 25M (LOW READ)
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;    //高位在前
SPI_InitStructure.SPI_CRCPolynomial = 7;

SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);

写cs5460
uint8_t  SPI_Send_Byte(uint8_t data)
{
//while( SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE) == RESET)//wait for TXE
//SPI_I2S_SendData(SPI1,data);
//while( SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE) == RESET);//wait for RXNE
//return SPI_I2S_ReceiveData(SPI1);

while((SPI1->SR & SPI_I2S_FLAG_TXE)==RESET);  /*等待发送寄存器空*/
SPI1->DR = data;                            /*发送一个字节*/
while((SPI1->SR & SPI_I2S_FLAG_RXNE)==RESET); /* 等待接收寄存器有效*/
return(SPI1->DR);
  }

void Write_CS5460(uint8_t Len)
{
  char i = 0;
  SelectCS5460;
  for(;i   {
SPI_Send_Byte(buf5460);
  }
  DeselectCS5460;
}

读取cs5460
void Read_CS5460(uint8_t Register_Num)
{
  char i = 0;
  SelectCS5460;
  SPI_Send_Byte(Register_Num);
  for(;i<3;i++)
  {
Buf5460=SPI_Receive_Data();
  }
  DeselectCS5460;
}

芯片初始化
void Init_CS5460(void)
{
  Soft_Reset_OFF;//复位序列
  delay_nms(30);//........
  Soft_Reset_ON;//复位序列

  //delay_nms(999);
  //Init_Serial();
  buf5460[0]=0xFF;
  buf5460[1]=0xFF;
  buf5460[2]=0xFF;
  buf5460[3]=0xFE;
  Write_CS5460(4);//初始化序列

  //Power_ON_HaltSys();
  //Clear_DRDY();
  buf5460[0]=0x40;
  buf5460[1]=0x00;
  buf5460[2]=0x18;
  buf5460[3]=0xE1;
  Write_CS5460(4);//写配置寄存器

  buf5460[0]=0x5E;
  buf5460[1]=0xFF;
  buf5460[2]=0xFF;
  buf5460[3]=0xFF;
  Write_CS5460(4);//清状态寄存器

  buf5460[0]=0x74;
  buf5460[1]=0x00;
  buf5460[2]=0x00;
  buf5460[3]=0x00;
  Write_CS5460(4);//写中断屏蔽寄存器

  buf5460[0]=0x78;
  buf5460[1]=0x00;
  buf5460[2]=0x00;
  buf5460[3]=0x00;
  Write_CS5460(4);//写控制寄存器

  buf5460[0]=0x4C;
  buf5460[1]=0x00;
  buf5460[2]=0x34;
  buf5460[3]=0x9C;
  Write_CS5460(4);//写EOUT脉冲输出寄存器

  buf5460[0]=0x4A;
  buf5460[1]=0x00;
  buf5460[2]=0x0F;
  buf5460[3]=0xA0;
  Write_CS5460(4);//写CYCLE COUNT寄存器

  buf5460[0]=0x44;
  buf5460[1]=0x40;//增益1
  buf5460[2]=0x00;
  buf5460[3]=0x00;
  Write_CS5460(4);//写电流增益寄存器

  buf5460[0]=0x48;
  buf5460[1]=0x40;//增益1
  buf5460[2]=0x00;
  buf5460[3]=0x00;
  Write_CS5460(4);//写电压增益寄存器
  Read_CS5460(0x1E);
  buf5460[3]=Buf5460[2];
  buf5460[2]=Buf5460[1];
  buf5460[1]=Buf5460[0];
  buf5460[0]=0x5e;
  Write_CS5460(4);//写状态寄存器
}

帮忙看看啦