$ cat /proc/cpuinfo processor : 3 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 108.00 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xd08 CPU revision : 3
Hardware : BCM2711 Revision : c03112 Serial : 100000003e728750 Model : Raspberry Pi 4 Model B Rev 1.2
$ uname -a Linux raspberrypi 5.10.17-v7l+ #1403 SMP Mon Feb 22 11:33:35 GMT 2021 armv7l GNU/Linux
64bit kernel info
$ cat /proc/cpuinfo processor : 3 BogoMIPS : 108.00 Features : fp asimd evtstrm crc32 cpuid CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x0 CPU part : 0xd08 CPU revision : 3
Hardware : BCM2835 Revision : c03112 Serial : 100000003e728750 Model : Raspberry Pi 4 Model B Rev 1.2
$ uname -a Linux raspberrypi 5.10.17-v8+ #1403 SMP PREEMPT Mon Feb 22 11:37:54 GMT 2021 aarch64 GNU/Linux
import board import digitalio import usb_hid from adafruit_hid.keyboard import Keyboard from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS from adafruit_hid.keycode import Keycode
# The Keycode sent for each button, will be paired with a control key keys_pressed = [Keycode.A, "Hello World!\n"] control_key = Keycode.SHIFT
# The keyboard object! time.sleep(1) # Sleep for a bit to avoid a race condition on some systems keyboard = Keyboard(usb_hid.devices) keyboard_layout = KeyboardLayoutUS(keyboard) # We're in the US :)
while True: keyboard_layout.write('A') time.sleep(0.01)
Hello world 출력하는 키보드(!) 예제 ㅋㅋ
import time
import board import digitalio import usb_hid from adafruit_hid.keyboard import Keyboard from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS from adafruit_hid.keycode import Keycode
# The keyboard object! time.sleep(1) # Sleep for a bit to avoid a race condition on some systems keyboard = Keyboard(usb_hid.devices) keyboard_layout = KeyboardLayoutUS(keyboard) # We're in the US :)
VBUS(GP40, 우측 상단)에 연결하면 USB Host 모드로만 작동해야 한다는 의미 같은데
아마 USB device 모드라면 USB를 통해 전원을 입력받아야 하기 때문이려나?
Whilst it is possible to connect the Raspberry Pi’s 5V pin to the Raspberry Pi Pico VBUS pin, this is not recommended. Shorting the 5V rails together will mean that the Micro USB cannot be used. An exception is when using the Raspberry Pi Pico in USB host mode, in this case 5V must be connected to the VBUS pin.
GP0이 TX GP1이 RX
LED는 GPIO25에 연결되어 있고, TP5로도 연결이 되어있는데
BOOTSEL은 TP6에만 되어있고 GPIO로 연결은 되어 있지 않다.
TP1 – Ground (close coupled ground for differential USB signals) TP2 – USB DM TP3 – USB DP TP4 – GPIO23/SMPS PS pin (do not use) TP5 – GPIO25/LED (not recommended to be used) TP6 – BOOTSEL
