option( 'timdac_hw', type: 'combo', choices: ['none', 'ch32v103'], value: 'none', description: 'Which hardware driver to use', ) option( 'bsp', type: 'string', value: '', description: 'Name of subproject to use as a board support pack', ) option( 'bsp_dep', type: 'string', value: 'bsp_dep', description: 'Name of the main dependency object in the board support pack', )