PythonBikeCpmputer/LcdManager.py at master · mxmanseven/PythonBikeCpmputer · GitHub

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#  download the repository and run python setup.py install to install it into your Python package directory.
#  https://gist.github.com/DenisFromHR/cc863375a6e19dce359d
from RPLCD.i2c import CharLCD

import sys
from math import ceil, floor
from EnduroScreenModel import EnduroScreenModel

class LcdManager:

    def __init__(self):
        self.lcd = CharLCD('PCF8574', 0x27)


    def setEnduroScreenByModel(self, enduroScreenModel):
        self.setEnduroScreen(
            enduroScreenModel.distanceMiles,
            enduroScreenModel.milesToNextPossable,
            enduroScreenModel.routeSpeed,
            enduroScreenModel.averageSpeed,
            enduroScreenModel.currentSpeed,
            enduroScreenModel.timeTotalSeconds,
            enduroScreenModel.paceTotalSeconds
        )

    def setEnduroScreen(
        self,
        distance,
        milesToNextPossable,
        routeSpeed,
        averageSpeed,
        currentSpeed,
        timeTotalSeconds,
        paceTotalSeconds):

        # knh todo - limit speed to 2 digits
        paceMinutes = int(abs(paceTotalSeconds / 60.0))
        paceSeconds = int(abs(paceTotalSeconds % 60))
        if paceTotalSeconds < 0:
            paceMinutes = floor(abs(paceTotalSeconds / 60.0))
            paceSeconds = int(abs(paceTotalSeconds) % 60)

        if paceMinutes > 10:
            paceMinutes = 9
            paceSeconds = 59

        paceSign = "+"
        if paceTotalSeconds < 0:
            paceSign = "-"

        sys.stdout.write('paceTotalSeconds ' + str(paceTotalSeconds) + '\r\n')
        sys.stdout.write('paceMinutes ' + str(paceMinutes) + '\r\n')
        sys.stdout.write('paceSeconds ' + str(paceSeconds) + '\r\n')
        sys.stdout.write('\r\n')

        line1 = ("D{:5.2f}   P{}{:01.0f}:{:02d}   {:2.0f}\r\n"
        .format(distance, paceSign, paceMinutes, paceSeconds, routeSpeed))

        if averageSpeed > 99:
          averageSpeed = 99

        line2 = "{:20.0f}\r\n".format(averageSpeed)

        timeMinutes = int(round(timeTotalSeconds / 60.0)) % 60
        timeSeconds = int(round(timeTotalSeconds % 60))

        milesToNextPossableAdjusted = milesToNextPossable
        if milesToNextPossable > 10:
            milesToNextPossableAdjusted = 9.9

        if currentSpeed > 99:
          currentSpeed  = 99

        line3 = ("T {:02.0f}:{:02d}  NP{:4.1f} {:4.0f}\r\n"
        .format(timeMinutes, timeSeconds, milesToNextPossableAdjusted, currentSpeed))

        # knh todo - get rounding correct

        # always round away from zero
        paceMarkerCount = int(ceil(abs(paceTotalSeconds / 15.0)))

        # We will display at most 9 pace chars
        if paceMarkerCount > 9:
            paceMarkerCount = 9
        # we have 20 chars, those that are not pace markers are spaces
        paddCharCount = 20 - paceMarkerCount

        # if we are ahead with positive paceTotalSeconds, use A
        # if we are behaind with negative paceTotalSeconds, use B
        if paceTotalSeconds > 0:
            paceMarkerChar = "A"
        else:
            paceMarkerChar = "B"

        paceString = ""

        # build correct length pace String
        for i in range(1, paceMarkerCount):
            paceString += paceMarkerChar

        # build correct length padd string and place it on the correct side
        #if paceTotalSeconds > 0:
        if paceTotalSeconds > 0:
            paddString = ""
            for i in range(1, paddCharCount):
                paddString += " "
            paceString = paddString + paceString

        line4 = paceString +  "\r\n"

        # sys.stdout.write(line1)
        # sys.stdout.write(line2)
        # sys.stdout.write(line3)
        # sys.stdout.write(line4)
        self.lcd.clear()
        self.lcd.write_string(line1)
        self.lcd.write_string(line2)
        self.lcd.write_string(line3)
        self.lcd.write_string(line4)


    # def lcdTest1(self):
    #     #                 12345678911234567892
    #     self.lcd.write_string('D12.34   P+15:35  RS')
    #     self.lcd.write_string('                  AS')
    #     self.lcd.write_string('T 09:00   NP 1.5  CS')
    #     self.lcd.write_string('BBBBBBBBB  AAAAAAAAA')