wiki:Component/Upsampling

SocLib Components General Index

Upsampling

1) Functional Description

The upsampling operation consists in adding zeros between the inputs (i.e. the OFDM symbols in our case). In our system, the upsampling factor is 4. This means that we add 3 zeros between each input. The architecture of the upsampling component is presented in the figure 1. It is composed of a upsampling 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

Upsampling has a fifo_depth parameter, which defines the fifo depth for the input. For example with a FIFO depth equal to 16 :

Uses('Upsampling', fifo_depth = 16);

b) CABA sources

CABA Constructor parameters

Upsampling(
     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 upsampling to the MWMR controller
  • soclib::caba::FifoInput<uint32_t> p_from_ctrl : interface from the MWMR controller to the upsampling

3) TLM-DT Implementation

a) Component definition & usage

Component definition

b) TLM-DT sources

TLM-DT Constructor parameters

Upsampling(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<Upsampling,32,tlm::tlm_base_protocol_types> *> p_config: configuration port
  • std::vector<tlm_utils::simple_target_socket_tagged<Upsampling,32,tlm::tlm_base_protocol_types> *> p_status: status port
  • std::vector<tlm_utils::simple_initiator_socket_tagged<Upsampling,32,tlm::tlm_base_protocol_types> *> p_read_fifo: port from the MWMR controller to the upsampling
  • std::vector<tlm_utils::simple_initiator_socket_tagged<Upsampling,32,tlm::tlm_base_protocol_types> *> p_write_fifo: port from the upsampling to the MWMR controller
Last modified 13 years ago Last modified on Jul 17, 2009, 4:42:02 PM

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