sin_multi_levels_int8.py

 
 
import array,os,textwrap,math
 
 
 
def generate(outfile, tablename, tablelength, numtables):
    fout = open(os.path.expanduser(outfile), "w")
 
 
    
    fout.write('#ifndef ' + tablename + '_H_' + '\n')
    fout.write('#define ' + tablename + '_H_' + '\n \n')
    fout.write('#include <Arduino.h>'+'\n')
    fout.write('#include "mozzi_pgmspace.h"'+'\n \n')
    fout.write('#define ' + tablename + '_NUM_CELLS '+ str(tablelength) +'\n')
    fout.write('CONSTTABLE_STORAGE(int8_t) ' + tablename + '_DATA [] = { \n')
 
    try:
        for tablenum in range(numtables):
            try:
                outstring = '\n'
                for num in range(tablelength):
                    
                    x = float(num)/tablelength
                    
                    t_x = math.sin(2*math.pi*x)*(float(tablenum+1)/numtables)
 
                    scaled = int16_t(math.floor(t_x*127.999))
 
                    outstring += str(scaled) + ', '
            finally:
                outstring = textwrap.fill(outstring, 80)
                outstring += '\n'
                fout.write(outstring)
    finally:
 
        fout.write('}; \n \n #endif /* ' + tablename + '_H_ */\n')
        fout.close()
        print "wrote " + outfile
 
 
generate("~/Desktop/sin_64level_int8.h", "SIN_64LEVEL", 256, 64)