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Why AD9739a cannot generate signal in cyclic mode

Question asked by Spectrum9000 on May 11, 2018
Latest reply on Jun 5, 2018 by Spectrum9000

Hi,

 

What my goal is to create a signal at 2.5 GSPS in cyclic mode with the AD9739a and Xilinx ZC706 in no-os setup. I followed the steps for no-os repository in github and managed to create a DDS signal successfully. Then, I tried to change the code for the DMA configuration. I imported the files given below to the project and called dac_buffer_load and dmac_start_transaction functions to generate a signal defined in look up table. However, no matter which mode it is (cyclic or tlast), the signal is always generated once. Is there any thing I am doing wrong here? You can find my main file attached here.

 

no-OS/common_drivers/dac_buffer at 2017_R1 · analogdevicesinc/no-OS · GitHub 

no-OS/common_drivers/dmac_core at 2017_R1 · analogdevicesinc/no-OS · GitHub 

 

Thank is in advance. Regards,

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