At this stage, clik tests (examples) have been successfully built, including the kernels, which have been cross-compiled to the RISC-V architecture. However, attempting to run an example will fail:

$ bin/copy_buffer
  Unable to create a clik device.

This is because the skeleton RefSi HAL provided for this tutorial contains stubs (empty functions) for all of the operations which are required to be implemented by the HAL, including the operation used to create a new HAL device which is used by clik. How to implement these operations will be described in the following sections.

Before starting to implement the HAL, we will briefly explain how to run all clik tests as a suite and obtain the number of passed and failed tests

$ ninja check
  [100 %] [11:0:0/11] FAIL concatenate_dma
  ******************** concatenate_dma FAIL in 0:00:00.006947 ********************
  Unable to create a clik device.

  ********************************************************************************

  Failed tests:
    blur
    concatenate_dma
    copy_buffer
    copy_buffer_async
    hello
    hello_async
    matrix_multiply
    ternary_async
    vector_add
    vector_add_async
    vector_add_wfv

  Passed:            0 (  0.0 %)
  Failed:           11 (100.0 %)
  Timeouts:          0 (  0.0 %)

As can be seen above, all clik tests are currently failing. This is to be expected when the RefSi HAL is still at the skeleton stage. Nevertheless, it is useful to run ninja check periodically while developing the HAL, to confirm that a particular operation has been implemented correctly or that a new change to the source code has not caused any regression.