    ROCK 3 >  Compute Module 3 >  Raspberry Pi CM4 IO Board

Getting Started

What you need

Necessary

Radxa CM3
Raspberry Pi CM4 IO board
One of the Storage media below:
- microSD, larger than 8GB.
Power supply
- The CM4 is powered by DC port and has a wide range of input voltage, 12V.
USB Keyboard and Mouse
- With four USB-A connectors, CM4 IO can be equipped with a full sized keyboard and mouse.
Monitor and HDMI Cable
- CM4 IO is equipped with a full sized HDMI connector. HDMI capable monitor is recommended.
- HDMI EDID display data is used to determine the best display resolution. On monitors and TVs that support 1080p (or 4K) this resolution will be selected. If 1080p is not supported the next available resolution reported by EDID will be used. This selected mode will work with MOST but not all monitors/TVs.
Micro USB
- If you want write image on CM4 IO from USB port , commands you need an USB Male A to Micro USB cable to connect CM4 IO and PC.

Optional

microSD Card Reader
- For flashing the image into microSD Card
USB type A to type Micro USB
- Write image on CM4 IO from USB port
USB to TTL serial cable
- This is needed for serial console.
Ethernet cable
- CM4 IO supports Internet access via WIFI or Ethernet.
- An Ethernet cable is used to connect your CM4 IO to a local network and the Interne
Audio cable
- Audio can be played through speaker or headphones using a standard 3.5mm jack.
WiFi/BT Cards

Install on eMMC from USB port

CM4 supports Maskrom mode, which is a special operation mode for CPU to wait for Micro USB port command. The PC tools we use to communicate with CM4 IO in Maskrom mode are the rkdevelopment tool and AndroidTool tool. We use the rkdevelopment tool in Linux/macOS and the AndroidTool tool under Windows.

Requirement

CM4 IO board
Power adapter
USB Male A to Micro USB .

Install Tools&Drivers

Windows

Step 1：Install Android tool

The tool is provided in a compressed package. First, download the compressed package of this tool, and click the download link (RKDevTool_Release_v2.81.zip). After downloading, unzip it. Installation is complete.

Step 2：Install driver

Using the RK driver assistant tool to install the driver. There’s no need to connect your Rockchip device during this procedure just download and extract RKDriverAssistant.zip Then double click on DriverInstall.exe in the RKDriverAssistant directory to start the utility. If you installed the Rockchip USB drivers for any other Rockchip devices already, make sure you click “Uninstall Driver” first.

Then click “Install Driver”, the driver has finish installing.

Linux

For Linux, we build the rkdeveloptool, >=1.32, from source code. To build rkdeveloptool on a Debian based Linux distribution, follow the instruction below: Install build dependency:

 sudo apt-get install libudev-dev libusb-1.0-0-dev dh-autoreconf

Clone the source code and build:

 git clone https://github.com/rockchip-linux/rkdeveloptool
 cd rkdeveloptool
 autoreconf -i
 ./configure
 make

If you encounter compile error like below

   ./configure: line 4269: syntax error near unexpected token `LIBUSB1,libusb-1.0'
   ./configure: line 4269: `PKG_CHECK_MODULES(LIBUSB1,libusb-1.0)'

You should install pkg-config libusb-1.0

   sudo apt-get install pkg-config libusb-1.0

Then re-run

   autoreconf -i
   ./configure
   make

Now you have rkdeveloptool executable at the current directory.

 sudo cp rkdeveloptool /usr/local/bin/

MacOS

For macOS, we build the rkdeveloptool, >=1.32, from source code. To build rkdeveloptool on macOS, you need homebrew(or similar package manager) to install required packages. Install build dependency:

   brew install automake autoconf libusb lsusb

Clone the source code and build:

   git clone https://github.com/rockchip-linux/rkdeveloptool
   cd rkdeveloptool
   autoreconf -i
   ./configure
   make

If you encounter compile error like below

   ./configure: line 4269: syntax error near unexpected token `LIBUSB1,libusb-1.0'
   ./configure: line 4269: `PKG_CHECK_MODULES(LIBUSB1,libusb-1.0)'

You should install pkg-config libusb-1.0

   brew install pkg-config

Then re-run

   autoreconf -i
   ./configure
   make

Now you have rkdeveloptool executable at the current directory.

   sudo cp rkdeveloptool /usr/local/bin/

Boot the board to maskrom mode

To boot CM4 IO into maskrom mode is simple:

1. Power off the board
- remove microSD card
2. Plug the USB Male A to Micro USB cable to CM4 IO port(the upper USB3 port), the other side to PC
3.Press the key and hold, short the follow pins, and then disconnect the pins,release the key.

4. For Linux/macOS

Now on your Linux PC, lsusb command show show the following usb devices

   Bus 003 Device 005: ID 2207:330c

5. For Windows

Open device manager in your Windows PC, check the Device Manager:

It means the device is in maskrom mode now.

6. Now plug the eMMC module and proceed the next step to flash.

Alternatively, if you are running Android and can access ADB, you can reboot the device to loader mode `adb reboot bootloader` then use the rkdeveloptool to reset the device into maskrom mode `rkdeveloptool rd 3` or Windows AndroidTool Switch button to go to maskrom mode.

Begin Installation USB -> eMMC

Linux/macOS

On your PC, run the rkdeveloptool

   rkdeveloptool ld        # List the device
   DevNo=1	Vid=0x2207,Pid=0x330c,LocationID=305	Maskrom

Download the loader (flash helper) to init the ram and prepare the flashing environment etc. If you don't have it, you can download it from here

   rkdeveloptool db rk356x_loader_vxxxx.bin

Write the GPT image to eMMC, start to write from offset 0. you can get image from here.

   rkdeveloptool wl 0 /path/to/xxx-gpt.img

Reboot the device

   rkdeveloptool rd

Now the device should boot the new image on eMMC Please notice that when you want to erase eMMC on board, you can use this command. Get zero.img from here.

   rkdeveloptool db rk356x_loader_vxxxx.bin
   rkdeveloptool wl 0 zero.img

Windows

Double click the RKDevTool.exe and you will see the following interface: Double click this red box and modify it to image in the second row.

Step 1: Select Loader

If your CM4 IO is in maskrom mode and connects to PC, you can see that the program detect it Found one MASKROM Device in the red box Next, click the button in the first row on the right last columns select the loader "rk356x_xxx_ loader_ xxxxx.bin ", Note: the loader (flash helper) is used to init the ram and prepare the flashing environment etc. If you don't have it, you can download it from here

Step 2: Select Image

Then click the right last columns to in the Image row and choose the image you want to flash.You can download the image from here Note: Normally the image name should ends with xxx-gpt.img. If the image name ends with xxx-rkupdate.img, you can not flash with this method.

Step 3: Run

Finally, click the "run" button, and you will see the content on the right. When the progress reaches 100% or show Download image OK in the red box, the download is completed.

Status

Resource

General purpose input-output (GPIO) connector

CM4 IO has a 40-pin expansion header. Each pin is distinguished by color.

GPIO number	Function4	Function3	Function2	Function1	Pin#	Pin#	Function1	Function2	Function3	GPIO number
				+3.3V	1	2	+5.0V
14	SPI0_MOSI_M0	I2C2_SDA_M0	PWM2_M1	GPIO0_B6	3	4	+5.0V
13	SPI0_CLK_M0	I2C2_SCL_M0	PWM1_M1	GPIO0_B5	5	6	GND
125		I2S1_SDI3_M1	SDMMC2_PWREN_M0	GPIO3_D5	7	8	GPIO0_D1	UART2_TX_M0		25
				GND	9	10	GPIO0_D0	UART2_RX_M0		24
23		UART0_CTSn	PWM0_M1	GPIO0_C7	11	12	GPIO3_C7	I2S1_SCLK_TX_M1		119
15			PWM0_M0	GPIO0_B7	13	14	GND
19		PWM4	VOP_PWM_M0	GPIO0_C3	15	16	GPIO3_D4	I2S1_SDI2_M1		124
				+3.3V	17	18	GPIO3_D3	I2S1_SDI1_M1		123
138	I2S2_SDI_M1	SPI3_MOSI_M0	I2C4_SDA_M0	GPIO4_B2	19	20	GND
136		SPI3_MISO_M0	I2S1_SDO1_M1	GPIO4_B0	21	22	GPIO3_C6	I2S1_MCLK_M1		118
139	I2S2_SDO_M1	SPI3_CLK_M0	I2C4_SCL_M0	GPIO4_B3	23	24	GPIO4_A6	I2S1_SCLK_RX_M1	SPI3_CS0_M0	134
				GND	25	26	SARADC_IN3
140			I2C2_SDA_M1	GPIO4_B4	27	28	GPIO4_B5	I2S1_SDO3_M1	I2C2_SCL_M1	141
137		I2S1_SDO2_M1	ISP_PRELIGHT_TRIG	GPIO4_B1	29	30	GND
21		SPI0_MISO_M0	PWM6	GPIO0_C5	31	32	GPIO4_C0	PWM11_IR_M1		144
22		SPI0_CS0_M0	PWM7_IR	GPIO0_C6	33	34	GND
120			I2S1_LRCK_TX_M1	GPIO3_D0	35	36	GPIO4_A7	I2S1_LRCK_RX_M1	SPI3_CS1_M0	135
18			PWM3_IR	GPIO0_C2	37	38	GPIO3_D2	I2S1_SDI0_M1		122
				GND	39	40	GPIO3_D1	I2S1_SDO0_M1		121

More details about 40-pin Header

Pins marked with color orange are designed for debug console.
PWM:x7,PWM0/PWM1/PWM2/PWM3/PWM6/PWM7/PWM11
SPI:X2,SPI0/SPI3
I2C:X2,I2C2/I2C4
UART:X2,UART0/UART2
ADC:X1, SARADC_IN3
I2S:X2, I2S1/I2S2

IO Voltage

RK3566 have three IO voltages, 1.8V/3.3V. For CM4 IO, the high level voltage of GPIO pin on 40-PIN HEADER is 3.3V.

| GPIO       | Voltage Level | Tolerance |
| ---------- | ------------- | --------- |
| SARADC_IN3    | 1.8V          | 1.98V     |

GPIO number

Rockchip RK3566 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below:

GPIO0_A0 ~ A7 
GPIO0_B0 ~ B7
GPIO0_C0 ~ C7
GPIO0_D0 ~ D7
   
GPIO1_A0 ~ A7
....
GPIO1_D0 ~ D7

The GPIO number can be calculated as below, take GPIO4_D1 (PIN26 on 4-0PIN HEADER) as an example:

GPIO4_D1 = 4*32 + 3*8 + 1 = 153
(A=0, B=1, C=2, D=3)

To set GPIO4_D1 output

cd /sys/class/gpio
echo 153 > export
cd gpio153
echo out > direction
echo 1 > value     # output high
echo 0 > value     # output low

Rock3/CM3/raspcm4io

Contents

Getting Started

What you need

Necessary

Optional

Install on eMMC from USB port

Requirement

Install Tools&Drivers

Windows

Step 1：Install Android tool

Step 2：Install driver

Linux

MacOS

Boot the board to maskrom mode

Begin Installation USB -> eMMC

Linux/macOS

Windows

Step 1: Select Loader

Step 2: Select Image

Step 3: Run

Status

Resource

General purpose input-output (GPIO) connector

More details about 40-pin Header

IO Voltage

GPIO number