if raw2 > 250 or value2 <= 0: # same as for 1st channel
gain2[gain] = 1
else:
gain2[gain] = target / value2
ee_gain = bytearray(16)
config.write("\n[gain]\n")
for index, gainID in enumerate(gains):
voltID = V_div[index]
g1 = gain1[gainID]
g2 = gain2[gainID]
config.write("ch0\\%dmV=%6.4f\n" % (voltID, g1))
config.write("ch1\\%dmV=%6.4f\n" % (voltID, g2))
# convert double 0.75 ... 1.25 -> byte 0x80-125 ... 0x80+125
ee_gain[2 * index] = int((g1 - 1) * 500 + 0x80 + 0.5)
ee_gain[2 * index + 1] = int((g2 - 1) * 500 + 0x80 + 0.5)
config.close()
print("eeprom gain content [ 40 .. 55 ]: ", ee_gain)
scope.set_calibration_values(ee_offset + ee_gain)
scope.close_handle()
print(
"\nReady, now install the configuration file '%s' into directory '~/.config/OpenHantek'\n"
% configfile)
g1 = gain1[ gainID ]
g2 = gain2[ gainID ]
if ( g1 ):
# convert double 0.75 ... 1.25 -> byte 0x80-125 ... 0x80+125
ee_calibration[ 2 * index + 32] = int( round( ( g1 - 1 ) * 500 + 0x80 ) )
if ( g2 ):
# convert double 0.75 ... 1.25 -> byte 0x80-125 ... 0x80+125
ee_calibration[ 2 * index + 33 ] = int( round( ( g2 - 1 ) * 500 + 0x80 ) )
if ( create_config ):
if ( g1 ):
config.write( "ch0\\%dmV=%6.4f\n" % ( voltID, g1 ) )
if ( g2 ):
config.write( "ch1\\%dmV=%6.4f\n" % ( voltID, g2 ) )
# endif ( measure_gain )
if ( create_config ):
config.close()
if ( eeprom ):
print( "eeprom content [ 8 .. 39 ]: ", binascii.hexlify( ee_calibration[ 0:32 ] ) )
print( "eeprom content [ 40 .. 55 ]: ", binascii.hexlify( ee_calibration[ 32:48 ] ) )
print( "eeprom content [ 56 .. 87 ]: ", binascii.hexlify( ee_calibration[ 48:80 ] ) )
# finally store the calibration values into eeprom
scope.set_calibration_values( ee_calibration )
scope.close_handle()
offset2 = {}
offhi1 = {}
offhi2 = {}
for gain in gainSteps:
# average 10 times over 100 ms (cancel 50 Hz / 60 Hz)
print( "Measure offset at low speed for gain ", gain )
raw1, raw2 = read_avg( gain, 110, 10 )
offset1[ gain ] = 0x80 - raw1
offset2[ gain ] = 0x80 - raw2
print( "Measure offset at high speed for gain ", gain )
raw1, raw2 = read_avg( gain, 30, 10 )
offhi1[ gain ] = 0x80 - raw1
offhi2[ gain ] = 0x80 - raw2
ee_offset = bytearray( 32 )
for index, gainID in enumerate( gains ):
# prepare eeprom content
ee_offset[ 2 * index ] = 0x80 - offset1[ gainID ]
ee_offset[ 2 * index + 1 ] = 0x80 - offset2[ gainID ]
ee_offset[ 2 * index + 16 ] = 0x80 - offhi1[ gainID ]
ee_offset[ 2 * index + 17 ] = 0x80 - offhi2[ gainID ]
print( "eeprom content [ 8 .. 39 ]: ", binascii.hexlify(ee_offset) )
scope.set_calibration_values( ee_offset )
scope.close_handle()