At some point, you may want to connect a joystick to your pi pico to read position. One option is Digilent’s PMod Joystick 2, which communicates through SPI. Fortunately, it is very easy to set up SPI communication on the rasperry pi pico!
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| import machine | |
| import utime | |
| import ustruct | |
| import sys | |
| from machine import Pin | |
| #PMOD2 Joystick | |
| #4 pins | |
| led_up = Pin(13, Pin.OUT) | |
| led_down = Pin(15, Pin.OUT) | |
| led_right = Pin(12, Pin.OUT) | |
| led_left = Pin(14, Pin.OUT) | |
| led_up.value(0) | |
| led_right.value(0) | |
| led_down.value(0) | |
| led_left.value(0) | |
| cs = machine.Pin(17, machine.Pin.OUT) | |
| spi = machine.SPI(0, | |
| baudrate= 10000, | |
| bits = 8, | |
| firstbit=machine.SPI.MSB, | |
| sck=machine.Pin(18), | |
| mosi=machine.Pin(19), | |
| miso=machine.Pin(16)) | |
| def getPosition(spi, cs): | |
| msg = bytearray() | |
| msg.append(0xC0) | |
| msg.append(0x00) | |
| msg.append(0x00) | |
| msg.append(0x00) | |
| msg.append(0x00) | |
| cs.value(0) | |
| spi.write(msg) | |
| cs.value(1) | |
| utime.sleep_us(25) | |
| cs.value(0) | |
| spi.write(msg) | |
| data = spi.read(5) | |
| cs.value(1) | |
| return data | |
| while 1: | |
| data = getPosition(spi, cs) | |
| print (data) | |
| print (data[0]) | |
| print (data[1]) | |
| if data[0] > 225: | |
| print ('RIGHT') | |
| led_right.value(1) | |
| else: | |
| led_right.value(0) | |
| if data[0] < 50: | |
| print ('LEFT') | |
| led_left.value(1) | |
| else: | |
| led_left.value(0) | |
| if data[1] > 225: | |
| print ('DOWN') | |
| led_down.value(1) | |
| else: | |
| led_down.value(0) | |
| if data[1] < 55: | |
| print ('UP') | |
| led_up.value(1) | |
| else: | |
| led_up.value(0) | |
| utime.sleep(0.05) | |
