class PowerMan:
def __init__(self, name):
# set-up logger:
logfile = user_data_dir() + sep + 'PowerMan.log'
log_config(filename = logfile, level = DEBUG,
format = '%(asctime)s - %(levelname)s: %(message)s')
# initialized and load config:
log_info('powerman starting up')
map = generate_map(name)
self.ctrl_socket = map['ctrl']
self.monitor_socket = map['mon']
self.opcd = OPCD_Interface(map['opcd_ctrl'], 'powerman')
bus = SMBus(self.opcd.get('gpio_i2c_bus'))
self.gpio_mosfet = GPIO_Bank(bus, self.opcd.get('gpio_i2c_address'))
self.power_pin = self.opcd.get('gpio_power_pin')
self.cells = self.opcd.get('battery_cells')
self.low_cell_voltage = self.opcd.get('battery_low_cell_voltage')
self.capacity = self.opcd.get('battery_capacity')
self.low_battery_voltage = self.cells * self.low_cell_voltage
self.critical = False
self.gpio_mosfet.write()
self.warning_started = False
# start threads:
self.standing = True
self.adc_thread = start_daemon_thread(self.adc_reader)
self.emitter_thread = start_daemon_thread(self.power_state_emitter)
self.request_thread = start_daemon_thread(self.request_handler)
log_info('powerman running')
def battery_warning(self):
# do something in order to indicate a low battery:
msg = 'CRITICAL WARNING: SYSTEM BATTERY VOLTAGE IS LOW; IMMEDIATE SHUTDOWN REQUIRED OR SYSTEM WILL BE DAMAGED'
log_warn(msg)
system('echo "%s" | wall' % msg)
while True:
self.gpio_mosfet.set_gpio(5, False)
sleep(0.1)
self.gpio_mosfet.set_gpio(5, True)
sleep(0.1)
def adc_reader(self):
voltage_adc = ADC(self.opcd.get('voltage_adc'))
current_adc = ADC(self.opcd.get('current_adc'))
voltage_lambda = eval(self.opcd.get('adc_2_voltage'))
current_lambda = eval(self.opcd.get('adc_2_current'))
self.current_integral = 0.0
hysteresis = Hysteresis(self.opcd.get('low_voltage_hysteresis'))
while True:
sleep(1)
try:
self.voltage = voltage_lambda(voltage_adc.read())
self.current = current_lambda(current_adc.read())
if self.current < 4.0:
self.current = 0.5
self.current_integral += self.current / 3600
print self.voltage, self.low_battery_voltage
if self.voltage < self.low_battery_voltage:
self.critical = hysteresis.set()
else:
hysteresis.reset()
if self.critical:
if not self.warning_started:
self.warning_started = True
start_daemon_thread(self.battery_warning)
except Exception, e:
log_err(str(e))
