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Jednodeskový ARM počítač - Odroid-C1
Specialni Periferie
IR receiver
Infra remote controller je uzitecny pro bezdratove dalkove spousteni skriptu a ovladani bezicich aplikaci. Lze pouzit libovolny IR dalkovy ovladac, ktery ma nosnou frekvenci shodnou s IR prijimacem osazenym v ODROIDu.
Pokud chceme pouzit dalkove ovladani (jine nez ktere k ODROIDu dodava Hardkernel) je potreba identifikovat komunikacni protokol a jednotliva tlacitka na ovladaci.
Identifikace tlacitek
Nejprve je potreba zastavit beziciho daemona lirc
sudo service lirc stop
Nyni muzeme spustit scanovaci utilitu ktera spusti pruvodce rozpoznanim tlacitek.
sudo irrecord --device /dev/lirc0 samsung_cleaner_tmp.conf
Po identifikaci ovladace a jeho tlacitek je mozne vytvoreny docasny soubor pouzit jako konfiguracni soubor pro lirc daemon.
sudo cp samsung_cleaner_tmp.conf /etc/lirc/lircd.conf sudo service lirc start
Nyni muzeme nastaveni zkontrolovat spustenim monitorovaciho klienta irw
odroid@odroid:~$ irw 0000000003fca956 00 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 01 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 02 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 03 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 04 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 05 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 06 KEY_VOLUMEUP SW-HF5_1 0000000003fca956 07 KEY_VOLUMEUP SW-HF5_1 0000000003fc817e 00 KEY_VOLUMEDOWN SW-HF5_1 0000000003fc817e 01 KEY_VOLUMEDOWN SW-HF5_1 0000000003fc817e 02 KEY_VOLUMEDOWN SW-HF5_1
Pouziti v Python
sudo apt-get install python-pylirc
Rozšiřující konektory
The Odroid-c1 povides one 40-pin dual row expansion header „J2“.
The location and pinout of these connectors is illustrated blew.
All signals on expansion headers are 3.3V except Analog input signal.
J2 - 2×20 pins
| Pin Number | Expansion Net Name | Description | Pin Number | Expansion Net Name | Description |
|---|---|---|---|---|---|
| 1 | 3.3V Power | 2 | 5.0V Power | ||
| 3 | I2CA_SDA | Export GPIO#74 | 4 | 5.0V Power | |
| 5 | I2CA_SCL | Export GPIO#75 | 6 | Ground | |
| 7 | GPIOY.BIT3 | Export GPIO#83, Wiring Pi GPIO#7 | 8 | TXD1 | Export GPIO#113 |
| 9 | Ground | 10 | RXD1 | Export GPIO#114 | |
| 11 | GPIOY.BIT8 | Export GPIO#88, Wiring Pi GPIO#0 | 12 | GPIOY.BIT7 | Export GPIO#87, Wiring Pi GPIO#1 |
| 13 | GPIOX.BIT19 | Export GPIO#116, Wiring Pi GPIO#2 | 14 | Ground | |
| 15 | GPIOX.BIT18 | Export GPIO#115, Wiring PI GPIO#3 | 16 | GPIOX.BIT7 | Export GPIO#104, Wiring Pi GPIO#4 |
| 17 | 3.3V Power | 18 | GPIOX.BIT5 | Export GPIO#102, Wiring Pi GPIO#5 | |
| 19 | GPIOX.BIT10(MOSI) | Export GPIO#107, Wiring Pi GPIO#12, PWM1 | 20 | Ground | |
| 21 | GPIOX.BIT9(MISO) | Export GPIO#106, Wiring Pi GPIO#13 | 22 | GPIOX.BIT6 | Export GPIO#103, Wiring Pi GPIO#6 |
| 23 | GPIOX.BIT8(SPI_SCLK) | Export GPIO#105, Wiring Pi GPIO#14 | 24 | GPIOX.BIT20 | Export GPIO#117, Wiring Pi GPIO#10 |
| 25 | Ground | 26 | GPIOX.BIT21 | Export GPIO#118, Wiring Pi GPIO#11 | |
| 27 | I2CB_SDA | Export GPIO#76 | 28 | I2CB_SCL | Export GPIO#77 |
| 29 | GPIOX.BIT4 | Export GPIO#101, Wiring Pi GPIO#21 | 30 | Ground | |
| 31 | GPIOX.BIT3 | Export GPIO#100, Wiring Pi GPIO#22 | 32 | GPIOX.BIT2 | Export GPIO#99, Wiring Pi#26 |
| 33 | GPIOX.BIT11 | Export GPIO#108, Wiring Pi GPIO#23, PWM0 | 34 | Ground | |
| 35 | GPIOX.BIT0 | Export GPIO#97, Wiring Pi GPIO#24 | 36 | GPIOX.BIT1 | Export GPIO#98, Wiring Pi GPIO#27 |
| 37 | ADC.AIN1 | 10bit ADC#1 (0~1.8Volt) | 38 | 1.8V Power | For ADC reference voltage. Output! |
| 39 | Ground | 40 | ADC.AIN0 | 10bit ADC#0 (0~1.8Volt) | |
I2C
SPI
Do kernelu je potřeba nahrát moduly driveru SPI.
sudo modprobe spicc sudo modprobe spidev
Potom zacne byt videt systemove zarizeni /dev/spidev0.0. Aby k němu mohli přistupovat i non-root uživatelé, tak je nutné vytvořit v /etc/udev/rules.d soubor (např. 80-linuxcnc.rules) s obsahem:
KERNEL=="spidev*", SUBSYSTEM=="spidev", GROUP="spi", MODE="0660"