# Make a Raspberry Pi OS microSD for CM-Panel POE (Old CM3+ version)

<abstract>
This article explains how to create a standard Raspbian Pi OS MicroSD to use on the CM-Panel POE starting
from an official Raspberry Pi MicroSD image
</abstract>

## Step-by-step guide

Download the image of standard Raspberry OS Version 2020-12-02 from these links:

* Lite version:
	* <https://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2020-02-14/2020-02-13-raspbian-buster-lite.zip>
* Desktop version:
	* <https://downloads.raspberrypi.org/raspbian/images/raspbian-2020-02-14/2020-02-13-raspbian-buster.zip>

Flash a microSD SD using Balena Etcher software.

* <https://www.balena.io/etcher/>


Mount the microSD just created on your PC (Linux or Windows) or your Mac. The first microSD partition labeled "boot" is formatted as FAT32 and visible on any system.
These files are to edit using an ASCII editor:

### Edit cmdline.txt

Change:

	console=serial0,115200

in:

	console=serial1,115200

### Edit config.txt

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
	
	# Debug port /dev/ttyS0
	enable_uart=1
	dtparam=uart1=on
	dtoverlay=uart1,txd1_pin=32,rxd1_pin=33

	# RS232/RS485/RS422 port on /dev/ttyAMA0 
	force_turbo=1
	dtoverlay=uart0,txd0_pin=36,rxd0_pin=37,pin_func=6
	
	# I2C 1 port on GPIO44 and GPIO45 to talk with the
	# touch screen controller and 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
	
	# Rotate the LCD 
	#display_rotate=2
	#framebuffer_width=800
	#framebuffer_height=480

### Download and save some binaries

In the first partition of the microSD save these binary files:

Root directory <code>/</code>

* [dt-blob.bin](./dt-blob.bin)
* [SSH](./SSH)

Directory <code>/overlays</code>

* [acme-dacplus.dtbo](./acme-dacplus.dtbo)
* [goodix-7-acme.dtbo](./goodix-7-acme.dtbo)
* [hifiberry-dacplus-overlay.dtbo](./hifiberry-dacplus-overlay.dtbo)


Insert the microSD inside the CM-Panel POE microSD socket

Remove the Supercap jumper

Close JUMP PROG BYPASS and power up the CM-Panel POE


@include='adv_cmpanel'