Add real ADSP-2191 assembly examples + open21xx assembler test

examples/adsp-2191_fir/ADSP-2191 FIR.txt

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+****************************************************************************
+
+fir.asm      N-tap finite impulse response filter (FIR)
+
+Analog Devices, Inc.
+DSP Division
+Three Technology Way
+P.O. Box 9106
+Norwood, MA 02062
+
+23-JUNE-2001 BJM
+
+This directory contains an example ADSP-2191, single-core subroutine 
+that implements a N-tap finite impulse response filter (FIR) using coefficients.
+
+Files contained in this directory:
+
+fir.dpj              VisualDSP project file
+fir.asm              ADSP-2191 source for FIR
+fir_test.asm         Calling function for fic.asm
+ADSP-2191.ldf     Linker description file 
+input_dec.dat        Sample data for FIR
+ _________________________________________________________________
+
+CONTENTS
+
+I.    FUNCTION/ALGORITHM DESCRIPTION
+II.   IMPLEMENTATION DESCRIPTION
+III.  DESCRIPTION OF INPUT DATA         
+
+I. FUNCTION/ALGORITHM DESCRIPTION
+
+The project fir.dpj contains an implementation of a single-core subroutine 
+that implements a N-tap finite impulse response filter (FIR).  This 
+routine has been optimized to take advantage of the repetitive multiply 
+accumulates inherent to the algorithm.
+
+y(n) = Summation from k=0 to M of h(k)*x(n-k)
+
+
+II.   IMPLEMENTATION DESCRIPTION
+
+The assembly language module FIR_TEST.ASM initializes the input and 
+coefficient buffers and then calls FIR.ASM.   
+     
+The first buffer declared, IN, is Num_Samp locations long.
+
+The next buffer declared, OUT, is also Num_Samp long, and stores the 
+output of the filter.
+
+Delay_Line is the third buffer declared.  This buffer holds the delay line.  
+Since there are past intermediate values for each stage of the FIR, the length of
+this buffer is as long as the number of Taps.
+
+The coefficient buffer, COEFF, contains the FIR filter coefficients.  The 
+coefficients are typically generated by a filter design software package.
+
+The linker descriptive file is ADSP-2191.LDF, which describes the hardware in 
+terms of memory spaces and peripherals.
+
+Because there is no data dependency between DSP cores, it is possible 
+to do perform an FIR in DSP core 1, while also performing an FIR in DSP core 2 
+on separate input data, using different coefficients.
+
+III.  DESCRIPTION OF INPUT DATA
+
+1. INPUT SAMPLES:
+-----------------
+This FIR routine expects input data which conforms to the following criteria:
+
+Generate input data such that an array of input fixed point values are arranged 
+in the following order:
+
+INPUT DATA
+
+indata(0)      
+indata(1)      
+indata(2)      
+indata(3)      
+...
+...
+...
+     
+
+
+2. COEFFICIENT DATA:
+-----------------------
+This FIR routine expects TAPS 1.15 fixed point values to be used as coefficients.
+
+COEFFICIENT DATA
+
+coef(0)
+coef(1)
+coef(2)
+coef(3)
+... 
+... 
+... 
+
+
+