遙控(其實是搖桿控制)電燈(2x3矩陣)
編輯歷史
| 時間 | 作者 | 版本 |
|---|---|---|
| 2017-07-19 13:37 – 13:37 | r0 – r1 | |
顯示 diff+ 遙控(其實是搖桿控制)電燈(2x3矩陣)
+ 又名：阿嬤復健器
+ *import RPi.GPIO as GPIO
+ *import time
+ *import spidev
+ *import os
+ *
+ *GPIO.setmode(GPIO.BCM)
+ *GPIO.setwarnings(False)
+ *
+ *pins = [[24,18,14],[25,23,15]]
+ *x=1
+ *y=1
+ *
+ *for group in pins:
+ * for each in group:
+ * GPIO.setup(each, GPIO.OUT)
+ * GPIO.output(each, False)
+ *
+ *def all_off():
+ * for group in pins:
+ * for each in group:
+ * GPIO.output(each, False)
+ *
+ *def isLeft():
+ * return True if vrx_pos < 100 else False
+ *def isRight():
+ * return True if vrx_pos > 900 else False
+ *def isUp():
+ * return True if vry_pos < 100 else False
+ *def isDown():
+ * return True if vry_pos > 900 else False
+ *
+ *
+ *def moveX(x,y):
+ * all_off()
+ * GPIO.output(pins[y%2][x%3], True)
+ *def moveY(x,y):
+ * all_off()
+ * GPIO.output(pins[y%2][x%3], True)
+ *
+ *
+ *# Open SPI bus
+ *spi = spidev.SpiDev()
+ *spi.open(0,0)
+ *
+ *# Function to read SPI data from MCP3008 chip
+ *# Channel must be an integer 0-7
+ *def ReadChannel(channel):
+ * adc = spi.xfer2([1, (8+channel)<<4, 0])
+ * data = ((adc[1]&3) << 8) + adc[2]
+ * return data
+ *
+ *# Define sensor channels
+ *# (channels 3 to 7 unused)
+ *swt_channel = 0
+ *vrx_channel = 1
+ *vry_channel = 2
+ *
+ *# Define delay between readings (s)
+ *delay = 0.2
+ *
+ *while True:
+ * # Read the joystick position data
+ * vrx_pos = ReadChannel(vrx_channel)
+ * vry_pos = ReadChannel(vry_channel)
+ *
+ * # Read switch state
+ * swt_val = ReadChannel(swt_channel)
+ *
+ * # Print out results
+ * print "--------------------------------------------"
+ * #print("X : {} Y : {} Switch : {}".format(vrx_pos,vry_pos,swt_val))
+ * print("X : {} Y : {} ".format(vrx_pos,vry_pos))
+ *
+ * # Wait before repeating loop
+ * time.sleep(delay)0
+ *
+ * if isLeft():
+ * x-=1
+ * moveX(x,y)
+ * if isRight():
+ * x+=1
+ * moveX(x,y)
+ * if isUp():
+ * y-=1
+ * moveY(x,y)
+ * if isDown():
+ * y+=1
+ * moveY(x,y)
+ *
+ *GPIO.cleanup()
+
+ 利用"搖桿"和"MCP3008 類比轉換"來控制燈泡，由搖桿輸出數字碼，經由類比轉換讓Respberry Pi 解讀，搖桿上有X與Y軸，分別表示前進與後退，而輸出的類比訊號會介於０～１０２３之間，其中一個方向會讓類比訊號小於１００反之另一個會大於９００，再設定大於９００與小於１００的數字會前後和左右。
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