%For download to atmel/DAC waveform generator
%MODIFIED to make printing CHARS ONLY

format compact
clear all

startflag =0 %required for read synch
samplerate = 40 %in 0.25 microsec ticks
numwaves = 250 %number of repeats
wavespace = 20 %in 5 mSec ticks

%convert to ascii printable chars for transmission
 sthi = fix(samplerate/16)+32
 stlo = samplerate-fix(samplerate/16)*16+32

 nuhi = fix(numwaves/16)+32
 nulo = numwaves-fix(numwaves/16)*16+32

 wvhi = fix(wavespace/16)+32
 wvlo = wavespace-fix(wavespace/16)*16+32 

x = 0:1:255 ;
a = fix(128 + 60*sin(2*pi*x/128) .* (1-cos(2*pi*x/256))) ; %test waveform

nibble = 1:1:512;
j=1;

%convert the 8-bit to 2 four-bit nibbles and add 32 to make printable chars
for i=1:2:511 ;
   nibble(i) = fix(a(j)/16) + 32;
   nibble(i+1) = a(j) - fix(a(j)/16)*16 + 32;
   j=j+1;
end
   
param = [startflag, sthi, stlo, nuhi, nulo, wvhi, wvlo ]

output = [ param, nibble];

fileid = fopen ('f:\232eod7.txt', 'w')
count = fwrite (fileid, output, 'uint8')
status = fclose (fileid)