[wiki:Component SocLib Components General Index] = FIR128 = == 1) Functional Description == The FIR (Finite Impulse Response) is a basic building block in any Digital Processing (DSP) system. The frenquency response of the filter depends on the value of its coefficients, or taps. In our case, the tap number of the filter is equal to 128. The architecture of the FIR is presented in the figure 1. It is composed of a FIR128 core and a MWMR wrapper. The wrapper is used to interface the core and the MWMR controller avalaible here [wiki:Component/VciMwmrController VciMwmrController]. [[Image(fir128.png,align=top,nolink)]] == 2) CABA Implementation == == a) Component definition & usage == === Component definition === * source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/caba/metadata/fir128.sd === Usage === FIR128 has a ''fifo_depth'' parameter, which defines the fifo depth for the input and the output. For example with a FIFO depth equal to 16 : Uses('Fir128', fifo_depth = 16); == b) CABA sources == * interface : source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/caba/source/include/fir128.h * implementation : source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/caba/source/src/fir128.cpp === CABA Constructor parameters === {{{ Fir128( sc_module_name name, // Instance name int ncycles) // Number of computation cycles }}} === CABA Ports === * sc_in '''p_resetn''' : hardware reset * sc_in '''p_clk''' : clock * soclib::caba::FifoOutput '''p_to_ctrl''' : interface from the fir128 to the MWMR controller * soclib::caba::FifoInput '''p_from_ctrl''' : interface from the MWMR controller to the fir128 == 3) TLM-DT Implementation == == a) Component definition & usage == === Component definition === * source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/tlmdt/metadata/fir128.sd == b) TLM-DT sources == * interface : source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/tlmdt/source/include/fir128.h * implementation : source:trunk/soclib/soclib/module/ofdm_chain_components/fir128/tlmdt/source/src/fir128.cpp === TLM-DT Constructor parameters === {{{ Fir128(sc_core::sc_module_name name, // Instance name uint32_t id, uint32_t read_fifo_depth, // Depth of input buffer uint32_t write_fifo_depth, // Depth of output buffer uint32_t n_read_channels, // Number of read channels uint32_t n_write_channels, // Number of write channels uint32_t n_config, // Number of configurations uint32_t n_status); // Number of status }}} === TLM-DT Ports === * std::vector *> '''p_config''': configuration port * std::vector *> '''p_status''': status port * std::vector *> '''p_read_fifo''': port from the MWMR controller to the fir128 * std::vector *> '''p_write_fifo''': port from the fir128 to the MWMR controller