DAC8554驱动--STM32F407实测通过

#include "sys.h"
#include "dac8554.h"
#include "delay.h"

void DAC8554_Init()
{
    GPIO_InitTypeDef  GPIO_InitStructure;

    DAC8552_RCC_GPIOClockCmd(); //使能端口引脚端口时钟

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出         
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; //下拉

    GPIO_InitStructure.GPIO_Pin = DAC8554_SYNC_Pin ;                 // 端口配置
    GPIO_Init(DAC8554_SYNC_Port, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = DAC8554_SCLK_Pin;
    GPIO_Init(DAC8554_SCLK_Port, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = DAC8554_DIN_Pin;
    GPIO_Init(DAC8554_DIN_Port, &GPIO_InitStructure);

}

//时序延时
void DAC8554_delay(void)
{
    int x = 100;  //2.7us
  while(--x);
}


//16位的数据
void DAC8554_Write( unsigned int data)
{
    char i=0;
  unsigned int code = data;
    DAC8554_SYNC = 1;
    DAC8554_delay();//SYNC脚一个高脉冲
    DAC8554_SYNC = 0;
    for( i=0; i<24; i++ )
    {
        DAC8554_SCLK = 1;
        if(code&0x800000)
            DAC8554_DIN = 1;          
        else
            DAC8554_DIN = 0;
        DAC8554_delay();
        DAC8554_SCLK = 0;
        code=code<<1;
        DAC8554_delay();
    }
}
//CH0
void DAC8554_Updata_A(unsigned int data)
{
    data = data | 0x100000;  //0001 0000 xxxx xxxx xxxx xxxx
    DAC8554_Write(data);
}
//CH1
void DAC8554_Updata_B(unsigned int data) 
{
    data = data | 0x120000; //0001 0010 xxxx xxxx xxxx xxxx
    DAC8554_Write(data);
}
//CH2
void DAC8554_Updata_C(unsigned int data) 
{
    data = data | 0x140000; //0001 0100 xxxx xxxx xxxx xxxx
    DAC8554_Write(data);
}
//CH3
void DAC8554_Updata_D(unsigned int data) 
{
    data = data | 0x160000; //0001 0110 xxxx xxxx xxxx xxxx
    DAC8554_Write(data);
}

//data: 0---4480  对应  0---4.48V
void DAC8554_Set(unsigned int data_A,unsigned int data_B,unsigned int data_C,unsigned int data_D)
{
    data_A = data_A / 1000.0 * 65535 / 4.48;  //0-65535
    data_B = data_B / 1000.0 * 65535 / 4.48;
    data_C = data_C / 1000.0 * 65535 / 4.48;
    data_D = data_D / 1000.0 * 65535 / 4.48;

    DAC8554_Updata_A(data_A);
    DAC8554_Updata_B(data_B);
    DAC8554_Updata_C(data_C);
    DAC8554_Updata_D(data_D);
}