RockpiS/dev/libmraa

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       ROCK Pi S >  Development >  Install Libmraa 

Libmraa on ROCK Pi S

This guide describes how to use libmraa on ROCK Pi S.

Install essential packages

Package libmraa-rockpis is in the Radxa APT buster-testing repository. Edit file /etc/apt/sources.list.d/apt-radxa-com.list and add the following:

For Debian Buster

   deb http://apt.radxa.com/buster-testing/ buster main

Get the pub key

   wget -O -  apt.radxa.com/buster-testing/public.key | sudo apt-key add -

Install essential packages:

   sudo apt-get update
   sudo apt-get install -y rockchip-overlay rockpis-dtbo libmraa-rockpis

Enable interface

See ROCK Pi S GPIO pintout. ROCK Pi S has a 26-pin colorful expansion header. Each pin is distinguished by color. mraa define follow:

Hardware V10

16 GPIO:

   PIN03      GPIO2_A2
   PIN05      GPIO2_B0
   PIN07      GPIO2_B3
   PIN09      GPIO4_C4
   PIN11      GPIO4_C2
   PIN12      GPIO4_A3
   PIN13      GPIO4_C6
   PIN15      GPIO4_C5
   PIN16      GPIO4_D2
   PIN18      GPIO4_D4
   PIN19      GPIO1_B0
   PIN21      GPIO1_A7
   PIN22      GPIO4_D5
   PIN23      GPIO1_B1
   PIN24      GPIO1_B2
   PIN26      GPIO1_B2

3 I2C:

   PIN23      I2C0_SDA
   PIN24      I2C0_SCL
   PIN3       I2C1_SCL
   PIN5       I2C1_SDA
   PIN13      I2C2_SDA
   PIN15      I2C2_SCL
  

1 SPI:

   PIN19      SPI2TX        //must disable i2c0
   PIN21      SPI2RX        //must disable i2c0
   PIN23      SPI2CLK
   PIN24      SPI2CSN

3 UART:

   PIN8       UART0_TX
   PIN10      UART0_RX
   PIN23      UART1_TX
   PIN24      UART1_RX
   PIN19      UART2_RX
   PIN21      UART2_TX

2 PWM:

   PIN11      PWM2
   PIN13      PWM3

1 ADC:

   PIN26      ADC_IN0          //the measure voltage must lower than 1.8v

modify /boot/hw_intfc.conf to enable pwm2,pwm3,uart1,uart2,i2c0,i2c1,i2c2 for test

Development

More introduction of libmraa can look at libmraa official website.