f19d08ea9735001d1144ac3138784750

XINLINX公司开发板的嵌入式源代码

/**
 * clock_generator_0.log
 */

        
    Running clock generation algorithm ...
    For FAMILY is other than virtex5, using DCM architecture
    Step 1: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: 90 or 270 degree
        Group: DCM0 ot DCM1 or DCM2 or DCM3
        Not external feedback
      }
      There are 3 required clocks are not generated
      Try to generate 1 of them in this step
      Required clock: CLKOUT2
      1. Try to use already instanced DCM's CLKOUTs
        { Try to use instanced DCM's CLKOUT for CLKOUT2
          Can not connect CLKGEN's CLKOUT2 to instanced DCM
        }
      2. Try to instance a DCM and connect to CLKGEN's CLKIN then use its CLKOUTs
        { Try to instance DCM and connect its CLKIN to CLKIN
          Instance DCM0 from CLKGEN's CLKIN
        }
        { Try to use instanced DCM's CLKOUT for CLKOUT2
            try non-group DCM0
          Can not connect CLKGEN's CLKOUT2 to extend DCM0's CLKOUTs
        }
      3. Try to instance a DCM and connect to 1st stage DCM with "0 phase" then use its CLKOUTs
        { Try to use instanced DCM's CLKOUT for intermediate clock of CLKOUT2
          Can not connect DCM's CLKOUT to extend for intermediate clock of CLKOUT2's CLKOUTs
        }
      4. Try to instance a DCM and connect to 1st stage DCM with "1/2 frequency" then use its CLKOUTs
        { Try to use instanced DCM's CLKOUT for intermediate clock of CLKOUT2
          Can not connect DCM's CLKOUT to extend for intermediate clock 50000000Hz of CLKOUT2's CLKOUTs
        }
      5. Try to instance a DCM from CLKGEN's CLKIN, 
         and instance another DCM from it with "0 phase" then use its CLKOUTs
        { 5.1. Try to instance DCM and connect its CLKIN to CLKIN
          Instance DCM0 from CLKGEN's CLKIN
        }
        { 5.2. Try to use instanced DCM's CLKOUT for intermediate clock of CLKOUT2
            try any-group DCM0
          Instance DCM1 from CLK2X
            try non-group DCM0
            try non-group DCM1
          Connect CLKOUT2 to CLK90
        }
    Step 2: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: 0 or 180 degree
        Group: DCM0 ot DCM1 or DCM2 or DCM3
        Not external feedback
      }
      There are 2 required clocks are not generated
      Try to generate 1 of them in this step
      Required clock: CLKOUT1
      1. Try to use already instanced DCM's CLKOUTs
        { Try to use instanced DCM's CLKOUT for CLKOUT1
            try has-group DCM1
          Connect CLKGEN's CLKOUT1 to DCM1's CLK0
        }
    Step 3: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: Non 0|90|180|270 degree fine phase shift
        Group: DCM0 ot DCM1 or DCM2 or DCM3
        Not external feedback
      }
    Step 4: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: 90|270 degree
        Group: NONE
        Not external feedback
      }
    Step 5: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: 0|180 degree
        Group: NONE
        Not external feedback
      }
      There are 1 required clocks are not generated
      Try to generate 1 of them in this step
      Required clock: CLKOUT0
      1. Try to use already instanced DCM's CLKOUTs
        { Try to use instanced DCM's CLKOUT for CLKOUT0
            try any-group DCM0
          Connect CLKGEN's CLKOUT0 to DCM0's CLK0
        }
    Step 6: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: Non 0|90|180|270 degree fine phase shift
        Group: NONE
        Not external feedback
      }
    Step 7: Try to generate required clocks that:
      { Frequency: 0Hz < frequency <= 400MHz
        Phase: 0 degree
        Group: NONE
        External feedback
      }
    Summary of using DCMonly architecture
      All required clocks are successfully generated