Jacqueline Jackson Digital Signal Processoring Solutions Abstract

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Using 5410 Multi-Channel Buffered Serial Port (McBSP) Sub-Address Scheme
Jacqueline Jackson Digital Signal Processoring Solutions
Abstract
memory constraints data page Multi-Channel Buffered Serial Port (McBSP) registers accessed using sub-address scheme. This document discusses data accessed through sub-address registers. code listing included.
Contents
Design Problem Solution
Examples
Example Code Listing
Tables
Table McBSP Register.2
Digital Signal Processing Solutions
December 1998
Design Problem
memory constraints data page McBSP registers accessed using subaddress scheme. data accessed through sub-address registers?
Solution
Multi-Channel Buffered Serial Port consists three ports twenty-three registers. those twenty-three registers, fifteen addressable through sub-address scheme. access those fifteen registers, address representing desired register first must written sub-address register (SPSAx). following table includes registers that must accessed using sub-address.
Table McBSP Register
Address McBSP McBSP McBSP Sub-Address 0038 0048 0034 0039 0049 0035 0x0000 0039 0049 0035 0x0001 0039 0049 0035 0x0002 0039 0049 0035 0x0003 0039 0049 0035 0x0004 0039 0049 0035 0x0005 0039 0049 0035 0x0006 0039 0049 0035 0x0007 0039 0049 0035 0x0008 0039 0049 0035 0x0009 0039 0049 0035 0x000A 0039 0049 0035 0x000B 0039 0049 0035 0x000C 0039 0049 0035 0x000D 0039 0049 0035 0x000E Register Acronym Name SPSAx Sub-Address Register SPCR1x Serial Port Control Register SPCR2x Serial Port Control Register RCR1x Receive Control Register RCR2x Receive Control Register XCR1x Transmit Control Register XCR2x Transmit Control Register SRGR1x Sample Rate Generator Register SRGR2x Sample Rate Generator Register MCR1x Multi-Channel Register MCR2x Multi-Channel Register RCERAx Receive Channel Enable Register Partition RCERBx Receive Channel Enable Register Partition XCERAx Transmit Channel Enable Register Partition XCERBx Transmit Channel Enable Register Partition PCRx Control Register
example, assume that interested writing #01h SPCR1 using port (SPCR10). first step would write SPSA port (SPSA0). doing this, address becomes SPCR10. next step would write #01h into SPCR10. Reference code below example.
Example Code Listing
SPCR1_SUBADDR SPSA0 SPCR10 SS.set .set .set #SPCR1_SUBADDR,SPSA0h #01h, SPCR10 ;address port ;address port ;Store SPCR1 sub-address ;into SPSA0 ;Storing into SPCR10.
Using 5410 Multi-Channel Buffered Serial Port (McBSP) Sub-Address Scheme
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Using 5410 Multi-Channel Buffered Serial Port (McBSP) Sub-Address Scheme

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