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2022-11-26T09:11:07Z

Created page with "{{rockpi4_header}} {{Languages|rockpi4/dev/libmraa}} ROCK Pi 4 > Development > use WiringX === Pinout in..."

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[[rockpi4 | ROCK Pi 4]] > [[rockpi4/dev | Development]] > [[rockpi4/dev/wiringX | use WiringX ]]

=== Pinout in wiringX ===

[[File:wiringX.jpg]]

=== Enable interface ===
See ROCK 4 [[Rockpi4/hardware/rockpi4#gpio | GPIO pinout]]. ROCK 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
rock@rockpi-4b:~$ 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
rock@rockpi-4b:~$

then '''reboot''' to make them effective.

=== Install wiringX ===

rock@rockpi-4b:~$ sudo apt-get install libmraa

=== Test ===
==== GPIO Test ====

Use '''mraa-gpio''' tool to test

rock@rockpi-4b:~$ 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@rockpi-4b:~$
rock@rockpi-4b:~$ sudo mraa-gpio set 40 1 //pin40 pull high
rock@rockpi-4b:~$ sudo mraa-gpio set 40 0 //pin40 pull low

==== I2C Test ====
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@rockpi-4b:~$ mraa-i2c list
Bus 0: id=07 type=linux default
Bus 1: id=02 type=linux
Bus 2: id=06 type=linux
rock@rockpi-4b:~$ 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@rockpi-4b:~$ sudo mraa-i2c set 0 0x50 0x10 0x55 //write
Device 50, Register = 10, Value = 55
rock@rockpi-4b:~$ sudo mraa-i2c get 0 0x50 0x10 //read
Register 0X10 = 0X55

==== SPI Test ====
Firstly modify '''/boot/hw_intfc.conf'''. When SPI1 is used, UART4 and spi1-flash dtbo should be disabled. When SPI2 is used, UART4 and I2C-6 should be disabled.
rock@rockpi-4b:~$ 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=on'''
'''intfc:spi2=on'''
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=spi1-flash'''
'''intfc:dtoverlay=devspi1''' #spi1
'''intfc:dtoverlay=devspi2''' #spi2

If need debug console, you could uncomment '''intfc:dtoverlay=console-on-ttyS2'''.

When SPI-1 and SPI-2 are enabled, and devspi1, devspi2 dtbo are added. The following two devices are created.

ls /dev/spidev*
/dev/spidev1.0 /dev/spidev2.0

Example for SPI-1 bus test.

root@rockpi-4b:~# 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@rockpi-4b:~# gcc spi.c -lmraa
then short '''pin19''' and '''pin21''' and run a.out
root@rockpi-4b:~# ./a.out
0xaa
0xaa
......

==== PWM test ====

modiy /boot/hw_intfc.conf,if use spi1,must disable uart4,if use spi2,disable i2c6.follow:
# 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 disablee

'''intfc:pwm0=on'''
'''intfc:pwm1=on'''
intfc:uart2=off
intfc:uart4=off
intfc:spi1=off
intfc:spi2=off
intfc:i2c2=off
intfc:i2c6=off
intfc:i2c7=off

Use c program in /usr/local/share/mraa/examples/c/pwm.c to test:

Modify the macro PWM in /usr/local/share/mraa/examples/c/pwm.c as follows to test PWM0. To test PWM1, change #define PWM 11 to #define PWM 13.

'''/* PWM declaration */'''
'''#define PWM 11'''
save and compile pwm.c
root@rockpi-4b:/usr/local/share/mraa/examples/c# gcc -o pwm pwm.c -lmraa
root@rockpi-4b:/usr/local/share/mraa/examples/c# ./pwm
PWM value is 0.010045
PWM value is 0.019985
PWM value is 0.030030
PWM value is 0.039971
PWM value is 0.050016
PWM value is 0.059956
PWM value is 0.070001
PWM value is 0.080046

==== UART Test ====
Disable console and enable uart2 and uart4 for uart test
root@rockpi-4b:~# 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=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
root@rockpi-4b:~#
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

==== ADC Test ====
connect signal you want to measure,and then compile mraa examplec file to test.
root@rockpi-4b:/usr/local/share/mraa/examples/c# '''gcc -o aio aio.c -lmraa'''
root@rockpi-4b:/usr/local/share/mraa/examples/c#'''./aio'''
ADC A0 read 3FF - 1023
ADC A0 read float - 1.00000
ADC A0 read 3FF - 1023
ADC A0 read float - 1.00000
ADC A0 read 3FF - 1023
ADC A0 read float - 1.00000
ADC A0 read 3FF - 1023
ADC A0 read float - 1.00000
ADC A0 read 3FF - 1023
ADC A0 read float - 1.00000

===More examples===
More examples (including examples written in python and java) can be found at:

/usr/local/share/mraa/examples/

Rockpi4/dev/wiringX - Revision history

Nascs: Created page with "{{rockpi4_header}} {{Languages|rockpi4/dev/libmraa}} ROCK Pi 4 > Development > use WiringX === Pinout in..."