CM3-Panel-7-poe technical documentation
Change the content of config.txt file in:
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
# uncomment for composite PAL
#sdtv_mode=2
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
#dtparam=audio=on
[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
#max_framebuffers=2
[all]
#dtoverlay=vc4-fkms-v3d
# -------------------------
# ACME Systems
# -------------------------
dtoverlay=goodix-7-acme
dtoverlay=disable-wifi
dtoverlay=disable-bt
#Ignore the HDMI cable hotplug (to avoid the delay at startup)
hdmi_ignore_hotplug=1
dtoverlay=pi3-disable-bt
enable_uart=1
dtparam=uart1=on
dtoverlay=uart1,txd1_pin=32,rxd1_pin=33
# Configure the uart0 on the console port hardware
# This port is managed by the SOC using the miniUART and located on Linux on /dev/ttyS0
force_turbo=1
dtoverlay=uart0,txd0_pin=36,rxd0_pin=37,pin_func=6
# Activates the I2C 1 port on GPIO44 and 45 to talk with the
# touch screen controller end camera crypto-chip
dtparam=i2c_arm=on
dtparam=i2c=on
dtparam=i2c_arm_baudrate=100000
dtoverlay=i2c1,pins_44_45
dtoverlay=i2c1-rtc,pcf8523
## Enable the DPI port to talk with the TFT display
dtoverlay=dpi18
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=800
framebuffer_height=480
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x6f005
hdmi_timings=800 0 40 48 88 480 0 13 3 32 0 0 0 60 0 32000000 6
start_x=1
gpu_mem=128
# Enable second I2C Bus 3
dtoverlay=i2c-gpio,bus=3,i2c_gpio_delay_us=1,i2c_gpio_sda=35,i2c_gpio_scl=27
# Set the pull up (input) pins 27 and 35
gpio=27,35=pu
dtparam=audio=off
dtoverlay=i2s-gpio28-31
dtoverlay=hifiberry-dacplus
$ sudo nano /etc/asound.conf
Contents:
pcm.!default {
type hw card 0
}
ctl.!default {
type hw card 0
}
$ sudo reboot
$ sudo apt install mplayer
$ aplay -l
Result:
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0 [HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ mkdir /home/pi/app/audio
Run Player examples :
$ mplayer nomefile.mp3
