Interfacing (DSI, CSI, I2C, etc.) • Raspberry Pi Zero 2 W, libmraa does not work

Hello Everyone,

I'm using Raspberry Pi Zero 2 W - Raspberry Pi 2021 hardware version.
Linux kernel version:
pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux
I installed the libmraa library from https://github.com/eclipse/mraa.git

Does anyone know why the Raspberry Pi has 40 pin header; but the libmras can detect only 26 pins
pi@raspberrypi:~ $ mraa-gpio list
01 3V3:
02 5V:
03 SDA0: GPIO I2C
04 5V:
05 SCL0: GPIO I2C
06 GND:
07 GPIO4: GPIO
08 UART_TX: GPIO UART
09 GND:
10 UART_RX: GPIO UART
11 GPIO17: GPIO
12 GPIO18: GPIO PWM
13 GPIO21: GPIO
14 GND:
15 GPIO22: GPIO
16 GPIO23: GPIO
17 3V3:
18 GPIO24: GPIO
19 SPI_MOSI: GPIO SPI
20 GND:
21 SPI_MISO: GPIO SPI
22 GPIO25: GPIO
23 SPI_CLK: GPIO SPI
24 SPI_CS0: GPIO SPI
25 GND:
26 SPI_CS1: GPIO SPI

// Get libmraa version:
pi@raspberrypi:~ $ mraa-gpio version
Version v2.2.0-49-g258bfcf on Raspberry Pi Model B Rev 1

// Set PIn #13, GPIO 2 does not change, the GPIO pin stays low all the time.
sudo mraa-gpio set 13 1

Why does the libmraa detect only 26 pin on the Raspberry Pi Zeror 2 W, Raspberry Pi 2021?
Why Pin #13, GPIO 2 always stay LOW?

Thanks in advance
Dennis

Statistics: Posted by dennisnguy — Mon Apr 08, 2024 4:26 pm

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