Source code for spinnman.messages.scp.impl.scp_led_request
from spinnman.messages.scp.abstract_messages.abstract_scp_request import AbstractSCPRequest
from spinnman.exceptions import SpinnmanInvalidParameterException
from spinnman.messages.sdp.sdp_header import SDPHeader
from spinnman.messages.sdp.sdp_flag import SDPFlag
from spinnman.messages.scp.scp_request_header import SCPRequestHeader
from spinnman.messages.scp.scp_command import SCPCommand
from spinnman.messages.scp.impl.scp_check_ok_response import SCPCheckOKResponse
[docs]class SCPLEDRequest(AbstractSCPRequest):
""" A request to change the state of an LED
"""
def __init__(self, x, y, cpu, led_states):
"""
:param x: The x-coordinate of the chip, between 0 and 255
:type x: int
:param y: The y-coordinate of the chip, between 0 and 255
:type y: int
:param cpu: The CPU-number to use to set the LED.
:type cpu: int
:param led_states: A dictionary mapping LED index to state with 0 being
off, 1 on and 2 inverted.
:type led_states: dict
:raise spinnman.exceptions.SpinnmanInvalidParameterException:\
* If x is out of range
* If y is out of range
* If cpu is out of range
* If LEDs are not in the range 0 to 7
* If LED states are not 0, 1 or 2.
"""
for led, state in led_states.items():
if type(led) is int and (led < 0 or led > 7):
raise SpinnmanInvalidParameterException(
"led_states", str(led),
"Keys must be LED indexes between 0 and 7.")
if state not in (0,1,2):
raise SpinnmanInvalidParameterException(
"led_states", str(state),
"LED states must be 0, 1 or 2.")
encoded_led_states = 0
for led, state in led_states.items():
encoded_led_states |= {0:2, 1:3, 2:1}[state] << (2*led)
super(SCPLEDRequest, self).__init__(
SDPHeader(
flags=SDPFlag.REPLY_EXPECTED, destination_port=0,
destination_cpu=cpu, destination_chip_x=x,
destination_chip_y=y),
SCPRequestHeader(command=SCPCommand.CMD_LED),
argument_1=encoded_led_states)
[docs] def get_scp_response(self):
""" See :py:meth:`spinnman.messages.scp.abstract_scp_request.AbstractSCPRequest.get_scp_response`
"""
return SCPCheckOKResponse("Set LED", "CMD_LED")