wiki:Component/FIR128

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 VciMwmrController.

2) CABA Implementation

a) Component definition & usage

Component definition

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

CABA Constructor parameters

Fir128(
     sc_module_name name,                     // Instance name
     int ncycles)  // Number of computation cycles

CABA Ports

  • sc_in<bool> p_resetn : hardware reset
  • sc_in<bool> p_clk : clock
  • soclib::caba::FifoOutput<uint32_t> p_to_ctrl : interface from the fir128 to the MWMR controller
  • soclib::caba::FifoInput<uint32_t> p_from_ctrl : interface from the MWMR controller to the fir128

3) TLM-DT Implementation

a) Component definition & usage

Component definition

b) TLM-DT sources

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<tlm_utils::simple_target_socket_tagged<Fir128,32,tlm::tlm_base_protocol_types> *> p_config: configuration port
  • std::vector<tlm_utils::simple_target_socket_tagged<Fir128,32,tlm::tlm_base_protocol_types> *> p_status: status port
  • std::vector<tlm_utils::simple_initiator_socket_tagged<Fir128,32,tlm::tlm_base_protocol_types> *> p_read_fifo: port from the MWMR controller to the fir128
  • std::vector<tlm_utils::simple_initiator_socket_tagged<Fir128,32,tlm::tlm_base_protocol_types> *> p_write_fifo: port from the fir128 to the MWMR controller
Last modified 13 years ago Last modified on Jul 17, 2009, 4:39:08 PM

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