Library

rtlab/Communication/SharedMemory

Block

The OpSharedMemoryWrite block allows a user to read a shared memory in memory or on a physical adress.

Figure 1: OpSharedMemoryWrite block

Mask

Figure 2: OpSharedMemoryWrite mask.

Description

The OpSharedMemoryWrite block is used in a Master or Slave subsystem along with the OpSharedMemoryCtrl block, to allow communication with and writing to shared memory.

Parameters

Controller ID: Specifies the controller ID of the OpShared Memory Ctrl that the Write block will use.

Offset: Specifies the starting memory offset in global Shared Memory space for this block.

Memory access size: Specifies the size of each write access to the memory. Each size corresponds to a certain amount of data written for each memory access:

Write enable: Allows the user to specify when to write to the shared memory. An enable input will be add to the block when selected. The write process will be active with a value equal to or greater than 1, and disable on input equal to 0. If this option is not selected, the block will write to the shared memory each time the block is called.

Inputs

Data: Data in the shared memory will be output using the address specified in the controller + the offset. Use a demux to specify the number of outputs to be used. For example, for a demux with a width of 3, the starting address is at 0xd4000, and the memory access size in word format with an offset of 0x00:

Memory access size is in long word format:

Enable: Enables the write process to the shared memory. The write process is active on values equal to or greater than 1, and disabled on 0. This input is only active if the Write enable option is selected in the block parameters.

Outputs

This block has no outputs.

Characteristics and Limitations