Housekeeping SPI should force hkspi_disable to zero on a digital reset.

[RTimothyEdwards]

At around line 1483:

if (wb_rst_i == 1'b1) begin
    hkspi_disable <= 1'b0;
end

This prevents the housekeeping SPI from going into an uncommunicative state due to setting the disable bit in software. If the above correction is not done, then the disable state can only be undone by a power-on-reset.

[RTimothyEdwards]

The better method is just to change the definition of spi_is_enabled:

wire spi_is_enabled = ~hkspi_disable | wb_rst_i;

This forces the SPI to be enabled whenever the digital reset (button) is active.