Heatsink 4012 Tutorial
Heatsink 4012 is a cooling fan specially tailored for ROCK 5B. The installation tutorial is shown in the figure:
- Paste the cooling silicone on the radiator;
- Apply thermal silica gel on the chip;
- Align the buckle with the exposed copper area of ROCK 5B and press down;
- Connect the power cord.
Configuration
The operating system has three modes by default：
- power_allocator: The system defaults to fanless mode or DC fan mode. Make sure that the machine can still work stably without a cooling fan;
- user_space: Manually control cooling fan mode. Users can control the speed of the cooling fan through the command terminal according to your needs;
- step_wise: automatic temperature adjustment mode. When the temperature of the CPU is below 60°C, the cooling fan is in a dormant state; And when the temperature of the CPU reaches above 60°C, the cooling fan starts to work. Note: When ROCK 5B is in shutdown or sleep state, the cooling fan does not work.
You can use the command terminal by "retsup->Hardware->Thermal governor", then use the space bar to select the mode, the specific operation is as follows:
Press "Ctrl + Alt + T" simultaneously to open a terminal, run rsetup command as below:
radxa@rock-5b:~$ rsetup
Typing the password and select Hardware to rsetup tool interface.
Select Hardware:
Please select an option below:
System Maintenance
Hardware
Overlays
Connectivity
User Settings
Localization
About
<Ok> <Cancel>
Then, select Thermal governor.
Manage on-board hardware:
Video capture devices
GPIO LEDs
Thermal governor
Configure DSI display mirroring
<Ok> <Cancel>
Select mode with spacebar
┌─────────────────────────────────────────┤ RSETUP ├───────────────────────────────────────────────┐
│ Please select the thermal governor. │
│ Recommendation: fanless or DC fan => power_allocator | PWM fan => step_wise │
│ │
│ (*) power_allocator │
│ ( ) user_space │
│ ( ) step_wise │
│ ( ) fair_share │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ │
│ <ok> <Cancel> │
└──────────────────────────────────────────────────────────────────────────────────────────────────│
If you choose user_space mode, you need to manually control the cooling fan.
Find the node of the fan device pwm-fan:
cat /sys/class/thermal/cooling_device*/type
For example, the node of the pwm fan is cooling_device1:
radxa@rock-5b: cat /sys/class/thermal/cooling_device1/type
pwm-fan
Note: The following operations take cooling_device1 as an example.
Directly open the highest speed:
radxa@rock-5b:~$ sudo cp /sys/class/thermal/cooling_device1/max_state /sys/class/thermal/cooling_device1/cur_state
You can check how many speeds the cooling fan supports through the following:
radxa@rock-5b:~$ cat /sys/class/thermal/cooling_device1/max_state
4
If you want to select the third speed, follow the instructions below:
echo 3 | sudo tee /sys/class/thermal/cooling_device1/cur_state
If you want to use another speed gear, you just need to change the number. If you want to turn off the cooling fan, just select 0 for the speed gear.
echo 0 | sudo tee /sys/class/thermal/cooling_device1/cur_state