osccal

#!/usr/bin/python3

import os
import subprocess
import sys
import time

projDir = os.path.dirname( os.path.realpath(sys.argv[0]) )
os.chdir( projDir )

sys.stderr.write("########################################################\n")
sys.stderr.write("############### burning calibrator #####################\n")
sys.stderr.write("########################################################\n")

subprocess.call(["avrdude", "-qq",  "-p", "atmega328p", "-c", "usbasp", "-e", "-V", "-U", "lfuse:w:0xE2:m", "-U", "hfuse:w:0xD2:m", "-U", "efuse:w:0xfd:m", "-U", "eeprom:w:0xff:m", "-U", "flash:w:./calibrator/calibrator.hex"])

time.sleep(3)

sys.stderr.write("########################################################\n")
sys.stderr.write("################# reading result #######################\n")
sys.stderr.write("########################################################\n")

p=subprocess.Popen(["avrdude", "-qq", "-c", "usbasp", "-p", "atmega328p", "-U", "eeprom:r:-:h"],
stderr=subprocess.PIPE, stdout=subprocess.PIPE)

out = p.communicate()[0]
if out=='':
    sys.stderr.write("No eeprom data\n")
    sys.exit(1)

o = [ int(x,16) for x in  out.split(b',')[:4] ]

if o[0]==5 and o[3]==5 and o[1]+o[2]==255:
    optimal_osccal = o[1]
    if len(sys.argv)>1 and sys.argv[1]=='-b':
        os.chdir("ATmegaBOOT")
        subprocess.call(["make","isp","OPTIMAL_OSCCAL_VALUE="+str(optimal_osccal)])
    else:
        print(optimal_osccal)
else:
    sys.stderr.write("No OSCCAL found in eeprom\n")
    sys.exit(1)