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标题: 28335 AD转换问题 [打印本页]

作者: reporter 时间: 2014-5-9 11:32 标题: 28335 AD转换问题

问题：下载程序后只能进行一次AD转换调节所测电压不会改变显示重新下载程序后会改变数值求解不知是哪个配置出了问题

while(1)
&nbsp; &nbsp;{
&nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;//AdcRegs.ADCTRL2.all = 0x4000; //reset
&nbsp; &nbsp;&nbsp;&nbsp;//AdcRegs.ADCTRL2.all = 0x2000; //software begin
&nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;adc_set( );
&nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;// Reset SEQ1
&nbsp; &nbsp;&nbsp;&nbsp;AdcRegs.ADCTRL2.bit.SOC_SEQ1=1;
&nbsp; &nbsp; display(result*3.0/4096.0);
&nbsp; &nbsp; AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
&nbsp; &nbsp;&nbsp;&nbsp;
&nbsp; &nbsp; delay();
&nbsp; &nbsp;
&nbsp; &nbsp;}&nbsp; &nbsp;&nbsp; &nbsp;
}&nbsp;&nbsp;
void&nbsp;&nbsp;adc_set(void )
{
&nbsp; &nbsp; InitAdc();&nbsp;&nbsp;// For this example, init the ADC&nbsp; &nbsp;
&nbsp; &nbsp;AdcRegs.ADCTRL1.bit.ACQ_PS = 0x01;
&nbsp; &nbsp;AdcRegs.ADCTRL3.bit.ADCCLKPS = 0x3;
&nbsp; &nbsp;AdcRegs.ADCTRL1.bit.SEQ_CASC = 0;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;// 1&nbsp;&nbsp;Cascaded mode
&nbsp; &nbsp;AdcRegs.ADCTRL1.bit.CONT_RUN=1;
&nbsp; &nbsp;AdcRegs.ADCTRL1.bit.SEQ_OVRD=1;
&nbsp; &nbsp;AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x04;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;// Setup continuous run
&nbsp;&nbsp;
&nbsp; &nbsp; // Step 5. User specific code, enable interrupts:

&nbsp; &nbsp;// Start SEQ1&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;AdcRegs.ADCTRL2.all = 0x2800; //software begin
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;while&nbsp;&nbsp;(AdcRegs.ADCST.bit.INT_SEQ1== 0) { }&nbsp; &nbsp;// Wait for interrupt
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
&nbsp; &nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;result =((AdcRegs.ADCRESULT0&gt;&gt;4) );
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//display(result*3.3/4096.0);
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;AdcRegs.ADCTRL1.bit.RESET = 1;
}&nbsp;&nbsp;

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