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Controlling RSPI registers with RSPI driver

Posted: 29 Mar 2012     Print Version  Bookmark and Share

Keywords:SPI bus  RSPI driver  C code 

The YRDKRX62N consists of on-board devices that communicate over the SPI bus such as the LCD, the Micron phase-change flash memory, and the microSD Card socket, with the RSPI peripheral in the RX62N MCU serving as the controller. This document describes the design and operation of an RSPI driver that employs standard C code to directly control the RSPI registers.

This driver was originally designed to support streaming of uncompressed 44Khz stereo audio data stored in the SDcard or the PCM flash memory. Performance of the driver has been verified to be sufficient to achieve the minimum 1411 kbps (1.4mbps) transfer rate needed to successfully stream 44kHz 16bit stereo PCM audio data to a host PC when combined with the overhead of the USB Mass Storage function. The driver also supports communication with the Okaya LCD on the YRDKRX62N.

View the PDF document for more information.

Originally published by Renesas Electronics at as "Multi-Slave RSPI Driver for YRDKRX62N".

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