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标题: 求助 AD5316实用程序例子 [打印本页]

作者: reporter 时间: 2013-10-12 10:44 标题: 求助 AD5316实用程序例子

本人使用的是P89LPC938 单片机，通过I2C与AD5316 通信，请大侠看看是哪里有错误,为什么没有写入数据，请帮忙修改下
AD5316芯片说明在附件中，AD5316与单片机的链接在图片中
其中&nbsp;&nbsp

D连接电阻接地，LDAC与单片机的一个管脚 P2.4相连接
ISendStr函数第一个参数是AD5316在I2C上的地址，
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;第二个参数是从地址
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;第三个参数是写入的数据地址
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;第四个参数是要写入的个数
int AD5316_Write(unsigned char ADC_Flags,unsigned int Data)
{
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;ADC_Address = 0x1C;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//AD5316在I2C上的地址
&nbsp; &nbsp;&nbsp; &nbsp; //选择ADC通道
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;switch (ADC_Flags){
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;case 'A':ADC_Pointer = 0x01;break;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;case 'B':ADC_Pointer = 0x02;break;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;case 'C':ADC_Pointer = 0x04;break;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;case 'D':ADC_Pointer = 0x08;break;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;default:Uart_Send(&quot;ADC not in AD5316!&quot;);return -1;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;};
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;LDAC = 0;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ADC_Data[1] = 0x7f;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;//Vout = (10*255 )/1024
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ADC_Data[2] = 0xfc;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;if (ISendStr(ADC_Address, ADC_Pointer, ADC_Data, 2)){
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Uart_Send(&quot;AD5316 is writing now!&quot;);
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;}else{
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Uart_Send(&quot;AD5316 write failed!&quot;);
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; return -1;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;}
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;return 0;
}

程序

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