【Raspberry Pi】キャッシュレスレジおもちゃの作り方

"""
This code is licensed under the MIT license. 
<https://opensource.org/licenses/MIT>

Copyright © 2022 nobo

Permission is hereby granted, free of charge,
to any person obtaining a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or 
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""

#必要なモジュールをインポート
import pandas as pd
import smbus
from time import sleep
lcd=smbus.SMBus(1)

#接続したI2C(lcd)のアドレス
ADDR=0x3e

#初期設定
def initial_set():
	initial_list=[0x38,0x39,0x14,0x70,0x56,0x6C,0x38,0x0C,0x01]
	for command in initial_list:
		lcd.write_byte_data(ADDR,0x00,command)
		sleep(0.2)

#ディスプレイクリア
def clear_display():
    clear_list=[0x38,0x0C,0x01]
    for clear in clear_list:
        lcd.write_byte_data(ADDR,0x00,clear)
        sleep(0.2)

#改行
#0x00:first,0x40:next,0x46:en
def line(num):
    lcd.write_byte_data(ADDR,0x00,0x80+num)
    sleep(0.2)

#ディスプレイへ文字の書き込み
def write_lcd(text):
    texts=str(text)
    encode_text=texts.encode("cp932")
    for message in encode_text:
        lcd.write_byte_data(ADDR,0x40,message)
        sleep(0.2)

#まとめてディスプレイに表示；1行目に商品名、2行目左詰めに値段、2行目右詰めでｴﾝ表示       
def display(text,cost,en="ｴﾝ"):
    clear_display()
    write_lcd(text)
    line(0x40)
    write_lcd(cost)
    line(0x46)
    write_lcd(en)

#動作確認
if __name__=="__main__":
    df=pd.read_csv("list.csv",index_col=0)
    z=input("what_num")
    a=df.index.get_loc(int(z))
    b=df.iloc[a]["product"]
    c=df.iloc[a]["cost"]
    initial_set()
    display(b,c)

"""
This code is licensed under the MIT license. 
<https://opensource.org/licenses/MIT>

Copyright © 2022 nobo

Permission is hereby granted, free of charge,
to any person obtaining a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or 
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""

#必要なモジュールをインポート
import smbus
from time import sleep
import RPi.GPIO as GPIO
import nfc
from playsound import playsound
import pandas as pd
import LCD

#GPIOの番号の指定方法をGPIO番号に指定
GPIO.setmode(GPIO.BCM)

#ピンにわかりやすい名前をつける
switch=21
LED=26

#switchピンを入力、LEDピンを出力に
GPIO.setup(switch,GPIO.IN)
GPIO.setup(LED,GPIO.OUT)

#I2C初期化
lcd=smbus.SMBus(1)

#接続したI2C(lcd)のアドレス
ADDR=0x3e

#nfcpy初期設定
clf = nfc.ContactlessFrontend('usb')

#felicaカードの読み込み
def read_felica():
    tag = clf.connect(rdwr={'on-connect': lambda tag: False})
    sc1 = nfc.tag.tt3.ServiceCode(0, 0x0B)
    bc1 = nfc.tag.tt3.BlockCode(0, service=0)
    return tag.read_without_encryption([sc1], [bc1])

#felicaカードへ書き込み    
def write_felica(data):
    tag = clf.connect(rdwr={'on-connect': lambda tag: False})
    sc1 = nfc.tag.tt3.ServiceCode(0, 0x09)
    bc1 = nfc.tag.tt3.BlockCode(0, service=0)
    write_data = tag.write_without_encryption([sc1], [bc1],data)

#チャージ
#カード読み込み->intに変換->チャージ額1000を加算->16バイト列に変換->カード書き込み->チャージOK表示->残額表示->LED消灯
#チャージ額上限の場合チャージNG表示
def charge(charge_money):
    global max_charge
    read_data=read_felica()
    read_data=int.from_bytes(read_data,"little")
    data=read_data+charge_money
    if data > max_charge:
        LCD.display("ﾁｬｰｼﾞNG",cost="",en="")
        return
    else:
        write_data = data.to_bytes(16,'little')
        write_felica(write_data)
        LCD.display("ﾁｬｰｼﾞOK",cost="",en="")
        LCD.display("ﾉｺﾘ",data)
        GPIO.output(LED,False)
        return  
        
#スイッチ押した後の動作
#合計金額表示->会計
#会計:カード読み込み->intに変換->合計額を減算->犬の鳴き声*2->残額表示->カード書き込み
#最後にリストを空
#リストが空の場合は何もせずreturn
#残高不足の場合はLED点灯->チャージしてね表示
def callback(switch):
    global total
    if len(total)==0:
        return       
    total_sum=sum(total)
    LCD.display("ｺﾞｳｹｲ",total_sum)
    LCD.display("ﾀｯﾁｼﾃﾈ",cost="",en="")
    read_data=read_felica()
    read_data=int.from_bytes(read_data,"little")
    data = read_data - total_sum
    if data >= 0:
        for i in range(2):
            playsound("dog.mp3")
        LCD.display("ﾉｺﾘ",data)
        write_data = int(data).to_bytes(16,'little')
        write_felica(write_data)
        total=[]
        return
    else:
        GPIO.output(LED,True)
        LCD.display("ﾌｿｸ",abs(data))
        LCD.display("ﾁｬｰｼﾞｼﾃﾈ",cost="",en="")
        return

#start
#一度に買えるのは3個まで
#list.csvにないものは一律100円
#チャージ上限額99999円
GPIO.add_event_detect(switch, GPIO.RISING,callback=callback, bouncetime=3000)
LCD.initial_set()
max_charge=99999
total=[]

while True:
    if len(total)>3:
        LCD.display("ｶｲｽｷﾞﾀﾞﾖ",cost="",en="")
        del total[-1]
        LCD.display("ﾎﾞﾀﾝｵｼﾃﾈ",cost="",en="")
    barcode=input("write_barcode")
    if barcode==str(10009).zfill(8):
        charge_money=1000
        LCD.display("ﾁｬｰｼﾞ",charge_money)
        LCD.display("ﾀｯﾁｼﾃﾈ",cost="",en="")
        data=charge(charge_money)
    elif str(4904810) in barcode:
        df=pd.read_csv("list.csv",index_col=0)
        a=df.index.get_loc(int(barcode))
        b=df.iloc[a]["product"]
        c=df.iloc[a]["cost"]
        LCD.display(b,c)
        total.append(c)
    else:
        LCD.display("ｿﾉﾀ",100)
        total.append(100)