NCONT ERROR in ACK for access 0 : ACK = 0x01 in ARM DS

Question

Hi team,

In our custom board, we use AGFB014R24B_3 FPGA SoC. The program is stuck at clock initialization when I run the u-boot-spl using ARM DS. Further, I step into the clock initialization function it is stuck at the cm_wait_for_lock() function. But the HPS clock crystal oscillator is fine.

When I comment on the cm_wait_for_lock() function, it throws an error "NCONT ERROR in ACK for access 0: ACK = 0x01. I don't know why this error came. If something is wrong in the program or some external facts It will go into Exception right, Why will it throw this error?

Thanks,

Regards,

Veerappan P.

jeet14 · Answer

Hi,For your custom board, I hope you have re-generated the u-boot files as mentioned on below link-https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderAgilex7#Build_U_45BootAlso, please check the HPS EOSC frequency configured in HPS and u-boot.dtsi file. RegardsTiwari

veerappan · Answer

Hi,In socfpga_agilex_socdk.dts the HPS EOSC frequency is 25MHz.soc {             clocks {                           osc1 {                                         clock-frequency = &lt;25000000&gt;;                            };               };};Thanks,Regards,Veerappan P.

jeet14 · Answer

Hi,I hope you have re-generated the uboot and u-boot-spl-dtb.hex files.Also made the necessary changes in the socfpga_agilex_socdk-u-boot.dtsi file w.r.t. your custom design.Please refer below link to generate the uboot.https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderAgilex7#Build_U_45BootRegardsTiwari

jeet14 · Answer

Hi,Let me know if you have any question on this.RegardsTiwari

jeet14 · Answer

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NCONT ERROR in ACK for access 0 : ACK = 0x01 in ARM DS

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