每日彙整: 2019-01-26

樹莓派、樹莓派之學習、樹莓派之教育

Rock It 《Armbian》十

在結束 Armbian 篇章前，略為說說 ROCK64 GPIO ，如是方能完整介紹這個開發平台吧。

藉著匯流排說明文件︰

ROCK64 Pi-2 and Pi-P5+ Bus

 

 

可知其設計盡量依循樹莓派的 GPIO 慣例也。

這可從 RPi.GPIO 程式庫之改寫看的更清楚︰

/Rock64-R64.GPIO

Python GPIO library for the Rock64 SBC (RPi.GPIO clone)

Rock64-R64.GPIO

A Python GPIO library for the Rock64 single-board computer (RPi.GPIO clone).

Python Libraries and Scripts

R64.GPIO
A re-implementation of the RPi.GPIO library for the Rock64. Currently under development.
See the wiki for documentation on Functions and GPIO Modes.

R64-GPIO-test.py
A simple test script. Outputs a list of internal vars, sets the GPIO mode to “BOARD”, sets up a GPIO output (blinks an LED if connected to pin 16), sets up a GPIO input (pulls-up and reports the state of pin 18), then cleans up all GPIO exports and exits.

Library Installation and Usage:

Importing R64.GPIO
Below is the reccomended method for importing this library into your project. For alternate methods, see the Installation and Usagepage in the wiki.

  1. Download the entire “R64” folder from the repo.
  2. Place the “R64” folder in the same directory as the Python script you’re working with.
  3. Within your script, substitute the traditional “import RPi.GPIO as GPIO” line for “import R64.GPIO as GPIO“.

Once imported, syntax for implemented functions should be identical to RPi.GPIO.

 

※ 參考︰

rock64@rock64:~/Rock64-R64.GPIO$ sudo python3 R64-GPIO-test.py 
[sudo] password for rock64: 
Testing R64.GPIO Module...

Module Variables:
Name           Value
----           -----
GPIO.ROCK      ROCK
GPIO.BOARD     BOARD
GPIO.BCM       BCM
GPIO.OUT       out
GPIO.IN        in
GPIO.HIGH      1
GPIO.LOW       0
GPIO.PUD_UP    0
GPIO.PUD_DOWN  1
GPIO.VERSION   0.6.3
GPIO.RPI_INFO  {'TYPE': 'Pi 3 Model B', 'MANUFACTURER': 'Embest', 'RAM': '1024M', 'REVISION': 'a22082', 'PROCESSOR': 'BCM2837', 'P1_REVISION': 3}

Testing GPIO Input/Output:
Output State : 1
Input State  : 1

Waiting 3 seconds for interrupt...
Timeout!

Testing PWM Output - DutyCycle - High Precision:
60Hz at 50% duty cycle for 1 second
60Hz at 25% duty cycle for 1 second
60Hz at 10% duty cycle for 1 second
60Hz at  1% duty cycle for 1 second

Testing PWM Output - DutyCycle - Low Precision:
60Hz at 50% duty cycle for 1 second
60Hz at 25% duty cycle for 1 second
60Hz at 10% duty cycle for 1 second
60Hz at  1% duty cycle for 1 second

Testing PWM Output - Frequency - Low Precision:
60Hz at 50% duty cycle for 1 second
30Hz at 50% duty cycle for 1 second
20Hz at 50% duty cycle for 1 second
10Hz at 50% duty cycle for 1 second

Test Complete

 

有興趣應用者，最好先讀讀

Rock64 single-board computer

This is a cousin of the Pine A64 board; it has made by the same people, and like the Pine A64, it has a 4-core, 64-bit processor. There are 3 variants available, with 1, 2 or 4 GB of memory. I have the ones with 4 GB, identified as ROCK64_V2.0 2017-0713 written on the circuit board, right above the location of the Rockchip RK3328.

This is where OS-developments are happening: https://github.com/ayufan-rock64/linux-build/releases. Kernel 4.4.70 is what is being used here at present.

There is quite a lot of development going on, so this info may change frequently as new versions come into existence.

 

文本，有個好開始呦☆