|
|
| (28 intermediate revisions by 3 users not shown) |
| Line 1: |
Line 1: |
| − | {{rockpi4_header}}
| |
| | | | |
| − | {{Languages|rockpi4/dev/libmraa}}
| |
| − |
| |
| − | [[rockpi4 | ROCK Pi 4]] > [[rockpi4/dev | Development]] > [[rockpi4/dev/libmraa | Install Libmraa ]]
| |
| − |
| |
| − |
| |
| − | = Libmraa-rockpi4 =
| |
| − |
| |
| − | Below is the instructions of how to install '''libmraa'''.
| |
| − |
| |
| − | == Install essential packages ==
| |
| − |
| |
| − | Edit your /etc/apt/sources.list and add the following:
| |
| − |
| |
| − | '''For Debian Stretch'''
| |
| − |
| |
| − | deb http://apt.radxa.com/stretch/ stretch main
| |
| − |
| |
| − | '''For Ubuntu bionic'''
| |
| − |
| |
| − | deb http://apt.radxa.com/bionic/ bionic main
| |
| − |
| |
| − | Get the pub key
| |
| − | wget -O - apt.radxa.com/stretch/public.key | sudo apt-key add -
| |
| − |
| |
| − | Update
| |
| − | sudo apt-get update && sudo apt-get upgrade
| |
| − |
| |
| − | Install essential packages:
| |
| − | sudo apt-get install -y rockchip-overlay && sudo apt-get install -y rockpi4-dtbo
| |
| − |
| |
| − | == Install the latest u-boot and kernel (optional)==
| |
| − | apt-get install rockpi4b-rk-u-boot-latest
| |
| − |
| |
| − | Manually run the u-boot flash script
| |
| − | /usr/local/sbin/rockpi4b_upgrade_bootloader.sh
| |
| − |
| |
| − |
| |
| − | Type '''YES''' to perform the uboot.img flashing.
| |
| − |
| |
| − | then install kernel
| |
| − | apt-get install linux-base
| |
| − | apt-get install linux-4.4-latest
| |
| − |
| |
| − |
| |
| − | After installation, check file '''/boot/extlinux/extlinux.conf'''. It lists all kernel version installed in ROCK Pi. The kernel corresponding to the first label is the newest version and the first boot option.
| |
| − |
| |
| − | == Enable interface ==
| |
| − | See rockpi4 [[Rockpi4/hardware/rockpi4#gpio | GPIO pinout]],ROCK Pi 4 has a 40-pin expansion header. Each pin is distinguished by color. mraa define follow:
| |
| − |
| |
| − | 27 GPIO:
| |
| − | PIN03 GPIO2_A2
| |
| − | PIN05 GPIO2_B0
| |
| − | PIN07 GPIO2_B3
| |
| − | PIN08 GPIO4_C4
| |
| − | PIN10 GPIO4_C3
| |
| − | 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
| |
| − | PIN27 GPIO2_A0
| |
| − | PIN28 GPIO2_A1
| |
| − | PIN29 GPIO2_B2
| |
| − | PIN31 GPIO2_B1
| |
| − | PIN32 GPIO3_C0
| |
| − | PIN33 GPIO2_B4
| |
| − | PIN35 GPIO4_A5
| |
| − | PIN36 GPIO4_A4
| |
| − | PIN37 GPIO4_D6
| |
| − | PIN38 GPIO4_A6
| |
| − | PIN40 GPIO4_A7
| |
| − | 2 I2C:
| |
| − | PIN3 I2C'''7'''_SDA
| |
| − | PIN5 I2C'''7'''_SCL
| |
| − | PIN27 I2C'''2'''_SCL
| |
| − | PIN28 I2C'''2'''_SCL
| |
| − | PIN29 I2C'''6'''_SCL
| |
| − | PIN31 I2C'''6'''_SDA
| |
| − | 2 SPI:
| |
| − | PIN19 SPI'''1'''TX //'''must disable uart4'''
| |
| − | PIN21 SPI'''1'''RX //'''must disable uart4'''
| |
| − | PIN23 SPI'''1'''_CLK
| |
| − | PIN24 SPI'''1'''_CS
| |
| − | PIN29 SPI'''2'''TX //'''must disable i2c6'''
| |
| − | PIN31 SPI'''2'''RX //'''must disable i2c6'''
| |
| − | PIN7 SPI'''2'''_CLK
| |
| − | PIN33 SPI'''2'''_CS
| |
| − | 1 UART:
| |
| − | PIN8 UART'''2'''_TX
| |
| − | PIN10 UART'''2'''_RX
| |
| − | PIN19 UART'''4'''_TX
| |
| − | PIN21 UART'''4'''_RX
| |
| − | 2 PWM:
| |
| − | PIN11 PWM'''0'''
| |
| − | PIN13 PWM'''1'''
| |
| − | 1 ADC:
| |
| − | PIN13 ADC0 //the measure voltage must''' lower than 1.8v'''
| |
| − |
| |
| − | modify '''/boot/hw_intfc.conf''' to enable '''pwm0,pwm1,uart2,uart4,i2c2,i2c6,i2c7''' for test
| |
| − | root@localhost:/# cat boot/hw_intfc.conf
| |
| − |
| |
| − | # Hardware Interface Config
| |
| − |
| |
| − | # For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays.
| |
| − |
| |
| − | # '''Set "on" to enable the optional hardware interfaces while set "off" to disable.'''
| |
| − |
| |
| − | '''intfc:pwm0=off'''
| |
| − | '''intfc:pwm1=off'''
| |
| − | '''intfc:uart2=off'''
| |
| − | '''intfc:uart4=off'''
| |
| − | '''intfc:spi1=off'''
| |
| − | '''intfc:spi2=off'''
| |
| − | '''intfc:i2c2=off'''
| |
| − | '''intfc:i2c6=off'''
| |
| − | '''intfc:i2c7=off'''
| |
| − |
| |
| − | # '''Devicetree Overlay Enable, uncomment to enable .dtbo under /boot/overlays/.'''
| |
| − |
| |
| − | #intfc:dtoverlay=at24c02
| |
| − | #intfc:dtoverlay=two-color-led
| |
| − | #intfc:dtoverlay=console-on-ttyS2
| |
| − | #intfc:dtoverlay=console-on-ttyS4
| |
| − | #intfc:dtoverlay=devspi1
| |
| − | #intfc:dtoverlay=devspi2
| |
| − | root@localhost:/#
| |
| − | then '''reboot''' to make them effective
| |
| − |
| |
| − | ==Install libmraa==
| |
| − |
| |
| − | apt-get install libmraa
| |
| − |
| |
| − | ==Test==
| |
| − | ===test gpio===
| |
| − |
| |
| − | Use '''mraa-gpio''' tool to test
| |
| − |
| |
| − | rock@localhost:~/mraa/build$ mraa-gpio list
| |
| − | 01 3V3:
| |
| − | 02 5V:
| |
| − | 03 SDA7: GPIO I2C
| |
| − | 04 5V:
| |
| − | 05 SCL7: GPIO I2C
| |
| − | 06 GND:
| |
| − | 07 SPI2_CLK: GPIO SPI
| |
| − | 08 TXD2: GPIO UART
| |
| − | 09 GND:
| |
| − | 10 RXD2: GPIO UART
| |
| − | 11 PWM0: GPIO PWM
| |
| − | 12 GPIO4_A3: GPIO
| |
| − | 13 PWM1: GPIO PWM
| |
| − | 14 GND:
| |
| − | 15 GPIO4_C5: GPIO
| |
| − | 16 GPIO4_D2: GPIO
| |
| − | 17 3V3:
| |
| − | 18 GPIO4_D4: GPIO
| |
| − | 19 SPI1TX,TXD4: GPIO SPI UART
| |
| − | 20 GND:
| |
| − | 21 SPI1RX,RXD4: GPIO SPI UART
| |
| − | 22 GPIO4_D5: GPIO
| |
| − | 23 SPI1CLK: GPIO SPI
| |
| − | 24 SPI1CS: GPIO SPI
| |
| − | 25 GND:
| |
| − | 26 ADC_IN0: AIO
| |
| − | 27 SDA2: GPIO I2C
| |
| − | 28 SCL2: GPIO I2C
| |
| − | 29 SCL6,SPI2RX: GPIO I2C SPI
| |
| − | 30 GND:
| |
| − | 31 SDA6,SPI2TX: GPIO I2C SPI
| |
| − | 32 GPIO3_C0: GPIO
| |
| − | 33 SPI2CS: GPIO SPI
| |
| − | 34 GND:
| |
| − | 35 GPIO4_A5: GPIO
| |
| − | 36 GPIO4_A4: GPIO
| |
| − | 37 GPIO4_D6: GPIO
| |
| − | 38 GPIO4_A6: GPIO
| |
| − | 39 GND:
| |
| − | 40 GPIO4_A7: GPIO
| |
| − | rock@localhost:~/mraa/build$
| |
| − | rock@localhost:~/mraa/build$ sudo mraa-gpio set 40 1 //pin40 pull high
| |
| − | rock@localhost:~/mraa/build$ sudo mraa-gpio set 40 0 //pin40 pull low
| |
| − | root@localhost:~#
| |
| − |
| |
| − | ===test i2c===
| |
| − | Firstly, modify the /boot/hw_intfc.conf file as following and then reboot to enable i2c2 i2c6 i2c7.
| |
| − | # Hardware Interface Config
| |
| − | # For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays.
| |
| − | # Set "on" to enable the optional hardware interfaces while set "off" to disable
| |
| − | intfc:pwm0=off
| |
| − | intfc:pwm1=off
| |
| − | intfc:uart2=off
| |
| − | intfc:uart4=off
| |
| − | intfc:spi1=off
| |
| − | intfc:spi2=off
| |
| − | intfc:i2c2=on
| |
| − | intfc:i2c6=on
| |
| − | intfc:i2c7=on
| |
| − |
| |
| − |
| |
| − | Then, use '''mraa-i2c''' tool to test,we must have a i2c slave device,for example,we use I2C EEPROM:
| |
| − | rock@localhost:~/mraa/build$ mraa-i2c list
| |
| − | Bus 0: id=07 type=linux default
| |
| − | Bus 1: id=02 type=linux
| |
| − | Bus 2: id=06 type=linux
| |
| − | rock@localhost:~/mraa/build$ sudo mraa-i2c detect 0 //device on bus 0 //i2c7
| |
| − | 00: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 50: 50 51 52 53 54 55 56 57 -- -- -- -- -- -- -- --
| |
| − | 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | 70: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
| |
| − | rock@localhost:~/mraa/build$ sudo mraa-i2c set 0 0x50 0x10 0x55 //write
| |
| − | Device 50, Register = 10, Value = 55
| |
| − | rock@localhost:~/mraa/build$ sudo mraa-i2c get 0 0x50 0x10 //read
| |
| − | Register 0X10 = 0X55
| |
| − |
| |
| − | ===test spi===
| |
| − | fristly,modiy '''/boot/hw_intfc.conf''',if use spi1,must disable uart4,if use spi2,disable i2c6.follow:
| |
| − | rock@localhost:~/mraa/build$ cat /boot/hw_intfc.conf
| |
| − |
| |
| − | # Hardware Interface Config
| |
| − |
| |
| − | # For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays.
| |
| − |
| |
| − | # Set "on" to enable the optional hardware interfaces while set "off" to disable.
| |
| − |
| |
| − | intfc:pwm0=on
| |
| − | intfc:pwm1=on
| |
| − | intfc:uart2=on
| |
| − | intfc:uart4='''off'''
| |
| − | '''intfc:spi1=on
| |
| − | '''intfc:spi2=on
| |
| − | intfc:i2c2=on
| |
| − | intfc:i2c6='''off'''
| |
| − | intfc:i2c7=on
| |
| − |
| |
| − | # Devicetree Overlay Enable, uncomment to enable .dtbo under /boot/overlays/.
| |
| − |
| |
| − | #intfc:dtoverlay=at24c02
| |
| − | #intfc:dtoverlay=two-color-led
| |
| − | #intfc:dtoverlay=console-on-ttyS2
| |
| − | #intfc:dtoverlay=console-on-ttyS4
| |
| − | '''intfc:dtoverlay=devspi1''' #spi1
| |
| − | '''intfc:dtoverlay=devspi2''' #spi2
| |
| − |
| |
| − | If need debug console, you could uncomment '''intfc:dtoverlay=console-on-ttyS2'''
| |
| − |
| |
| − | use '''c''' to test spi,compile spi.c,if use spi1,must disable
| |
| − | root@localhost:~# cat spi.c
| |
| − | #include <signal.h>
| |
| − | #include <stdlib.h>
| |
| − | #include <unistd.h>
| |
| − |
| |
| − | /* mraa header */
| |
| − | #include "mraa/spi.h"
| |
| − |
| |
| − | /* SPI declaration */
| |
| − | #define SPI_BUS 0
| |
| − |
| |
| − | /* SPI frequency in Hz */
| |
| − | #define SPI_FREQ 400000
| |
| − | int
| |
| − | main(int argc, char** argv)
| |
| − | {
| |
| − | mraa_result_t status = MRAA_SUCCESS;
| |
| − | mraa_spi_context spi;
| |
| − | int i, j;
| |
| − |
| |
| − | /* initialize mraa for the platform (not needed most of the times) */
| |
| − | mraa_init();
| |
| − |
| |
| − | //! [Interesting]
| |
| − | /* initialize SPI bus */
| |
| − | spi = mraa_spi_init(SPI_BUS);
| |
| − | if (spi == NULL) {
| |
| − | fprintf(stderr, "Failed to initialize SPI\n");
| |
| − | mraa_deinit();
| |
| − | return EXIT_FAILURE;
| |
| − | }
| |
| − |
| |
| − | /* set SPI frequency */
| |
| − | status = mraa_spi_frequency(spi, SPI_FREQ);
| |
| − | if (status != MRAA_SUCCESS)
| |
| − | goto err_exit;
| |
| − |
| |
| − | /* set big endian mode */
| |
| − | status = mraa_spi_lsbmode(spi, 0);
| |
| − | if (status != MRAA_SUCCESS) {
| |
| − | goto err_exit;
| |
| − | }
| |
| − | while(1) {
| |
| − | printf("0x%x\n",mraa_spi_write(spi, 0xaa));
| |
| − | }
| |
| − | err_exit:
| |
| − | mraa_result_print(status);
| |
| − |
| |
| − | /* stop spi */
| |
| − | mraa_spi_stop(spi);
| |
| − |
| |
| − | /* deinitialize mraa for the platform (not needed most of the times) */
| |
| − | mraa_deinit();
| |
| − |
| |
| − | return EXIT_FAILURE;
| |
| − | }
| |
| − | root@localhost:~# gcc spi.c -lmraa
| |
| − | then short '''pin19''' and '''pin21''' and run a.out
| |
| − | root@localhost:~# ./a.out
| |
| − | 0xaa
| |
| − | 0xaa
| |
| − | ......
| |
| − |
| |
| − | ===test pwm===
| |
| − |
| |
| − | for pwm python test,should install python and libpython2.7
| |
| − |
| |
| − | apt-get install libpython2.7 python
| |
| − |
| |
| − | use python script follow:
| |
| − |
| |
| − | root@localhost:~# cat pwm.py
| |
| − | #!/usr/bin/env python
| |
| − | # Example Usage: Generates PWM at a step rate of 0.01 continuously.
| |
| − | import mraa
| |
| − | import time
| |
| − |
| |
| − | x = mraa.Pwm(11) # pin11 pwm0
| |
| − | # x = mraa.Pwm(13) # pin13 pwm1
| |
| − | x.period_us(700)
| |
| − | x.enable(True)
| |
| − |
| |
| − | value= 0.0
| |
| − |
| |
| − | while True:
| |
| − | x.write(value)
| |
| − |
| |
| − | time.sleep(0.05)
| |
| − |
| |
| − | value = value + 0.01
| |
| − | if value >= 1:
| |
| − | value = 0.0
| |
| − | root@localhost:~#
| |
| − |
| |
| − | then run pwm.py
| |
| − |
| |
| − | root@localhost:~# ls
| |
| − | pwm.py
| |
| − | root@localhost:~# chmod +x pwm.py
| |
| − | root@localhost:~# ./pwm.py
| |
| − |
| |
| − | ===test uart===
| |
| − | Disable console and enable uart2 and uart4 for uart test
| |
| − | root@localhost:/# cat boot/hw_intfc.conf
| |
| − |
| |
| − | # Hardware Interface Config
| |
| − |
| |
| − | # For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays.
| |
| − |
| |
| − | # Set "on" to enable the optional hardware interfaces while set "off" to disable.
| |
| − |
| |
| − | intfc:pwm0=on
| |
| − | intfc:pwm1=on
| |
| − | '''intfc:uart2=on'''
| |
| − | '''intfc:uart4=on'''
| |
| − | intfc:spi1=on
| |
| − | intfc:spi2=off
| |
| − | intfc:i2c2=on
| |
| − | intfc:i2c6=off
| |
| − | intfc:i2c7=off
| |
| − |
| |
| − | # Devicetree Overlay Enable, uncomment to enable .dtbo under /boot/overlays/.
| |
| − |
| |
| − | #intfc:dtoverlay=at24c02
| |
| − | #intfc:dtoverlay=two-color-led
| |
| − | #intfc:dtoverlay=console-on-ttyS2
| |
| − | #intfc:dtoverlay=console-on-ttyS4
| |
| − | root@localhost:/#
| |
| − | then '''reboot'''. Connect your serial line to the corresponding serial port.
| |
| − | use ssh connect to rockpi4,we must have 2 windows(ssh and serial console ),one is for send data,anothor is for receive.
| |
| − |
| |
| − | send command follow:
| |
| − | sudo mraa-uart dev 0 baud 1500000 send data
| |
| − | or
| |
| − | sudo mraa-uart dev 1 baud 1500000 send data
| |
| − | receive command follow:
| |
| − | sudo mraa-uart dev 0 baud 1500000 recv 1000
| |
| − | or
| |
| − | sudo mraa-uart dev 1 baud 1500000 recv 1000
| |
| − |
| |
| − | the receive window will show the data
| |
| − |
| |
| − | ===test adc===
| |
| − | connect signal you want to measure,and then compile mraa examplec file to test.
| |
| − | rock@localhost:~/mraa$ ls examples/c/aio.c
| |
| − | examples/c/aio.c
| |
| − | gcc examples/c/aio.c -lmraa
| |
| − |
| |
| − | then run a.out
| |
| − |
| |
| − | ==More examples==
| |
| − |
| |
| − | More examples (including examples written in python and java) can be found at:
| |
| − |
| |
| − | /usr/local/share/mraa/examples/
| |
