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GAMEPI20に純なLinux(RaspberryPi OS)を入れる
https://github.com/darrenliew96/gamepi20_drivers
RasPi ImagerでカードにOSを焼く
Updateする
sudo apt update sudo apt full-upgrade audo apt dist-update
$ uname -a Linux raspberrypi 5.10.63+ #1459 Wed Oct 6 16:40:27 BST 2021 armv6l GNU/Linux
$ nano gamepi20.dts
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
fragment@0 {
target = <&spi0>;
__overlay__ {
status = "okay";
spidev@0{
status = "disabled";
};
spidev@1{
status = "disabled";
};
};
};
fragment@1 {
target = <&gpio>;
__overlay__ {
gamepi20_pins: gamepi20 {
brcm,pins = <25 27 >;
brcm,function = <1 1>; /* out */
brcm,pull = <0>; /* none */
};
};
};
fragment@2 {
target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
gamepi20: gamepi20@0{
compatible = "sitronix,st7789v";
reg = <0>;
pinctrl-names = "default";
pinctrl-0 = <&gamepi20_pins>;
spi-max-frequency = <96000000>;
rotate = <90>;
width = <240>;
height = <320>;
fps = <60>;
buswidth = <8>;
spi-cpol;
spi-cpha;
custom = <1>;
bgr;
reset-gpios = <&gpio 27 1>;
dc-gpios = <&gpio 25 0>;
led-gpios = <&gpio 24 1>;
/*cs-gpios = <&gpio 8 0>;*/
debug = <0>;
init = <0x1000011
0x20000ff
0x1000036 0xA0
0x100003a 0x05
0x1000021
0x100002a 0x00 0x01 0x00 0x3f
0x100002b 0x00 0x00 0x00 0xef
0x10000b2 0x0c 0x0c 0x00 0x33 0x33
0x10000b7 0x35
0x10000bb 0x1f
0x10000c0 0x0c
0x10000c2 0x01
0x10000c3 0x12
0x10000c4 0x20
0x10000c6 0x0f
0x10000d0 0xa4 0xa1
0x10000e0 0xd0 0x08 0x11 0x08 0x0C 0x15 0x39 0x33 0x50 0x36 0x13 0x14 0x29 0x2d
0x10000e1 0xd0 0x08 0x10 0x08 0x06 0x06 0x39 0x44 0x51 0x0b 0x16 0x14 0x2f 0x31
0x1000029>;
};
};
};
__overrides__ {
speed = <&gamepi20>,"spi-max-frequency:0";
rotate = <&gamepi20>,"rotate:0";
width = <&gamepi20>,"width:0";
height = <&gamepi20>,"height:0";
fps = <&gamepi20>,"fps:0";
debug = <&gamepi20>,"debug:0";
};
};
元ネタの https://github.com/darrenliew96/gamepi20_drivers にあるファイルから一部修正してある。
具体的には、
修正前 led-gpios = <&gpio 24 0>; 修正後 led-gpios = <&gpio 24 1>;
$ sudo dtc -@ -I dts -O dtb -o /boot/overlays/gamepi20.dtbo gamepi20.dts
# Uncomment some or all of these to enable the optional hardware interfaces dtparam=i2c_arm=on dtparam=i2s=on dtparam=spi=on #dtoverlay=i2c-dev=spi_bcm2835 # Automatically load overlays for detected cameras camera_auto_detect=0 #無効にしておく # Automatically load overlays for detected DSI displays display_auto_detect=0 #無効にしておく # Enable DRM VC4 V3D driver #dtoverlay=vc4-kms-v3d #max_framebuffers=2 #無効にしておく # Disable compensation for displays with overscan disable_overscan=1 [cm4] # Enable host mode on the 2711 built-in XHCI USB controller. # This line should be removed if the legacy DWC2 controller is required # (e.g. for USB device mode) or if USB support is not required. #otg_mode=1 #無効にしておく [all] #dtoverlay=pi3-disable-bt #dtoverlay=pi3-miniuart-bt #enable_uart=1 #GAMEPI20のディスプレイドライバ指定 dtoverlay=gamepi20 #画面解像度を適当に小さくしておく(HDMIはVGAの60fps GAMEPI20は320x240) hdmi_force_hotplug=1 hdmi_cvt=640 480 60 1 0 0 0 hdmi_group=2 hdmi_mode=1 hdmi_mode=87 audio_pwm_mode=2 dtoverlay=audremap,pins_18_19
sudo apt-get install cmake git cd ~ git clone https://github.com/tasanakorn/rpi-fbcp cd rpi-fbcp/ mkdir build cd build/ cmake .. make sudo install fbcp /usr/local/bin/fbcp
フレームバッファー間のコピーを行うコマンド。
プライマリディスプレイのフレームバッファの内容をセカンダリディスプレイのフレームバッファにコピーする。
つまり、ミラーリング。
sudo nano /etc/modulesに追記 i2c-dev spi-bcm2835 flexfb fbtft_device
sudo nano /etc/modprobe.d/fbtft.conf options fbtft_device name=flexfb gpios=reset:27,dc:25,cs:8,led:24 speed=96000000 bgr=1 fps=60 custom=1 height=240 width=320 options flexfb setaddrwin=0 width=320 height=240 init=-1,0x11,-2,120,-1,0x36,0xA0,-1,0x3A,0x05,-1,0x21,-1,0x2A,0x00,0x01,0x00,0x3F,-1,0x2B,0x00,0x00,0x00,0xEF,-1,0xB2,0x0C,0x0C,0x00,0x33,0x33,-1,0xB7,0x35,-1,0xBB,0x1F,-1,0xC0,0x2C,-1,0xC2,0x01,-1,0xC3,0x12,-1,0xC4,0x20,-1,0xC6,0x0F,-1,0xD0,0xA4,0xA1,-1,0xE0,0xD0,0x08,0x11,0x08,0x0C,0x15,0x39,0x33,0x50,0x36,0x13,0x14,0x29,0x2D,-1,0xE1,0xD0,0x08,0x10,0x08,0x06,0x06,0x39,0x44,0x51,0x0B,0x16,0x14,0x2F,0x31,-1,0x29,-3
fbcp & exit 0
| キー | BCM No. |
| ↑ | 12 |
| → | 13 |
| ← | 21 |
| ↓ | 20 |
| SELECT | 16 |
| START | 26 |
| Ｙ | 17 |
| Ｘ | 22 |
| Ａ | 23 |
| Ｂ | 4 |
| Ｌ | 5 |
| Ｒ | 6 |
Ｌ Ｒ ┌────┐ ↑ │ │ Ｙ ← → │ │ Ｘ Ｂ ↓ │ │ Ａ └────┘ SELECT START
#!/usr/bin/python3
import RPi.GPIO as GPIO
import time
import sys
#ポート番号の定義
SW_U = 12
SW_D = 20
SW_L = 21
SW_R = 13
SW_A = 23
SW_B = 4
SW_X = 22
SW_Y = 17
SW_L2 = 5
SW_R2 = 6
SW_SEL = 16
SW_STA = 26
#GPIOの設定
GPIO.setmode(GPIO.BCM)
#GPIOを入力モードに設定してプルダウン抵抗を有効にする
GPIO.setup(SW_U, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_D, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_L, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_R, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_A, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_B, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_X, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_Y, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_L2, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_R2, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_SEL, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(SW_STA, GPIO.IN, pull_up_down=GPIO.PUD_UP)
while True:
try:
if(GPIO.input(SW_U) == 0):
print("UP")
elif(GPIO.input(SW_D) == 0):
print("DOWN")
elif(GPIO.input(SW_L) == 0):
print("LEFT")
elif(GPIO.input(SW_R) == 0):
print("RIGHT")
elif(GPIO.input(SW_A) == 0):
print("A")
elif(GPIO.input(SW_B) == 0):
print("B")
elif(GPIO.input(SW_X) == 0):
print("X")
elif(GPIO.input(SW_Y) == 0):
print("Y")
elif(GPIO.input(SW_L2) == 0):
print("L-BACK")
elif(GPIO.input(SW_R2) == 0):
print("R-BACK")
elif(GPIO.input(SW_SEL) == 0):
print("SELECT")
elif(GPIO.input(SW_STA) == 0):
print("START")
time.sleep(0.1) #0.1秒間待つ
except KeyboardInterrupt: #Ctrl+Cキーが押された
GPIO.cleanup() #GPIOをクリーンアップ
sys.exit()
GAMEPI20.png