hpi_dsp_code_read_block
error = hpi_dsp_code_read_block(length, &dsp_code,
hpi_dsp_code_read_block(length, &dsp_code, &pcode);
err = hpi_dsp_code_read_block(length, &dsp_code,
hpi_dsp_code_read_block(length, &dsp_code, &pcode);
short hpi_dsp_code_read_block(size_t words_requested,