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<br />module ADC_control(clk48m,rst,VAREF,data_out,button_input);<br /> input clk48m;//pay more attention to the ADC clock , it's need to 40M<br /> input rst;<br /> input button_input;<br /> inout VAREF;<br /> output[7:0] data_out; //结果送到LED上<br /> wire clk10m;<br /> wire clk40m;<br />//-----------------------------control the ADC------------------------------------------ <br /> reg[2:0] state;<br /> reg[11:0] adc_result;<br /> wire DATAVALID;<br /> wire CALIBRATE;<br /> wire BUSY;<br /> wire[11:0] ADC_RESULT;<br /> wire data_come;<br /> reg ADCSTART;<br /> reg ADCRESET;<br /> assign data_come=(~BUSY)&DATAVALID;//意味数据有效<br /> <br /> <a href="mailto:always@(posedge">always@(posedge</a> clk10m)<br /> begin<br /> if(rst )<br /> begin<br /> state<=3'b000;<br /> ADCRESET<=1'b1; //ADC initial state<br /> ADCSTART<=1'b0; //not start to ADC<br /> adc_result<=12'h000; //the ADC result<br /> end<br /> else case(state)<br /> 3'b000: begin <br /> ADCRESET<=1'b0;<br /> ADCSTART<=1'b0;<br /> adc_result<=adc_result;<br /> state<=3'b001;<br /> end<br /> 3'b001: begin ////let the ADC start to work<br /> ADCRESET<=1'b0;<br /> adc_result<=adc_result;<br /> if(CALIBRATE) //上电校准后,启动AD转换<br /> begin state<=3'b001;ADCSTART<=1'b0; end<br /> else begin state<=3'b011; ADCSTART<=1'b1; end<br /> end<br /> 3'b011: begin <br /> ADCRESET<=1'b0;<br /> if(data_come)//读取结果<br /> begin<br /> adc_result<=ADC_RESULT;<br /> state<=3'b000;ADCSTART<=1'b0;<br /> end<br /> else begin<br /> adc_result<=adc_result;<br /> state<=3'b011;ADCSTART<=1'b1;<br /> end<br /> end<br /> default: begin<br /> ADCRESET<=1'b0;<br /> ADCSTART<=1'b0;<br /> adc_result<=12'h000;<br /> state<=3'b000;<br /> end<br /> endcase<br /> end <br /> assign data_out=button_input?adc_result[11:4]:8'b1111_1111;<br />pll_analog MM(.POWERDOWN(1'b1),.CLKA(clk48m),.LOCK(),.GLA(clk40m),.GLB(clk10m));<br />intern_voltage M_ADC(<br /> .SYS_CLK(clk40m),<br /> .SYS_RESET(!rst), <br /> .VAREF(VAREF),<br /> .DATAVALID(DATAVALID),<br /> .INTERNAL_TEMPERATURE_STB(1'b1),//使能内部温度<br /> .ADCSTART(ADCSTART),//ADC begin to work<br /> .ADCRESET(ADCRESET),//ADC initial state<br /> .PWRDWN(1'b0),<br /> .MODE(4'b0110), //8'bit not power down<br /> .VAREFSEL(1'b0), //inter reference voltage<br /> .STC(8'b00000101), //the ADC result keep 7 waiting ADCCLOCK<br /> .TVC(8'b00000000), //ADCCLOCK=SYSCLK/4<br /> .CHNUMBER(5'b11111),//选择读温度<br /> .CALIBRATE(CALIBRATE), <br /> .BUSY(BUSY),<br /> .SAMPLE(),<br /> .ADC_RESULT(ADC_RESULT),//ADC result<br /> .ACMCLK(), //如果读内部温度,这个信号没有用吧?<br /> .INIT_ADDR(), //如果读内部温度,这个信号没有用吧?<br /> .INIT_DATA(), //如果读内部温度,这个信号没有用吧?<br /> .INIT_ACM_WEN() //如果读内部温度,这个信号没有用吧?<br /> );<br />endmodule<br />我是这样配置的,可读取的内核温度值总是0, 怎样才能读取到正确的值? |
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