1. guide

1.1 Purpose

The purpose of this library is to provide an interface for DSP program control.

1.2 Overview

This library provides the following interfaces.

• program load
• data light
• data read
• Program execution starts
• Stop program execution
• Execution completion check

An overview of each [function] is explained below.

1.3 Functional overview

●Program load

Transfers the DSP program stored in work RAM etc. to DSP program RAM.

●Data light

Transfers DSP program data (parameters) stored in work RAM etc. to DSP data RAM.

●Data read

Reads data (execution results, etc.) from DSP data RAM.

●Start execution

Set the program counter and start running the DSP program.

●Stop execution

Stops execution of the DSP program.

●Execution completion check

Checks whether the DSP program has finished executing.

1.4 Calling Sequence

The calling sequence from program loading to obtaining execution results is shown below.

void GoDsp()
{
          Uint32 dsp_result[10]; /* DSP result storage variable */

          DSP_WriteData(DSP_RAM_1 | 0, (Uint32 *)0x6050000, 15);
               /* Transfer data from work RAM to RAM1 of DSP data RAM 15 times */
          DSP_LoadProgram(0, (Uint32 *)0x6050100, 256);
               /* Transfer data from work RAM to DSP program RAM 256 times */
          DSP_Start(0);
               /* Run the DSP program from 0x00 */
          while(DSP_CheckEnd(&dsp_status) == DSP_NOT_END);
               /* Loop until finished */
          DSP_ReadData(dsp_result, DSP_RAM_2 | 0, 10);
               /* Transfer data from RAM2 of DSP data RAM to DSP result storage variable 10 times */
     ......
}