Periplex GPIO pin configuration issue

[vatsal]

We will provide it within two day.

[vatsal]

Steps to Install Periplex 0.0.2

1. Frsrt you should Run the following command to refresh the package list:

   • sudo apt update && sudo apt upgrade

2. Install the periplex package,run the following command:

   • sudo apt install periplex

3. After installing the periplex package, you need to reboot the Board:

   • sudo reboot

Once the system is back online, you can use periplex-sync as before.

Regarding Your Issue

We have resolved the issue of receiving 3000 bytes at 9600 baud rate without any delay. However, at 115200 baud rate, the same approach does not work due to internal FIFO limitations.

To successfully receive data at 115200 baud, you can use the following Python script, which introduces a 20-millisecond delay between transmitted packets:

import serial
import time
import random
import string

# Open the serial port
ser = serial.Serial(
    port='/dev/ttyUSB0',  # UART port
    baudrate=115200,      # Common default baudrate, adjust as needed
    bytesize=serial.EIGHTBITS,
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    timeout=1             # Read timeout in seconds
)

def generate_random_string(length):
    """
    Generate a random string of specified length 
    using uppercase letters and spaces
    """
    # Use uppercase letters and space for variety
    characters = string.ascii_uppercase + ' '
    return ''.join(random.choice(characters) for _ in range(length))

# Generate a long random string of the same length as the previous numeric string
data = generate_random_string(3000)  # Same approximate length as previous data

try:
    # Write data in chunks with a delay
    chunk_size = 100  # Adjust this value to control transfer speed
    delay_between_chunks = 0.02  # 20 milliseconds between chunks

    for i in range(0, len(data), chunk_size):
        # Write a chunk of data
        chunk = data[i:i+chunk_size]
        ser.write(chunk.encode('utf-8'))
        
        # Print progress
        print(f"Sent chunk {i//chunk_size + 1}, {len(chunk)} bytes")
        
        # Delay between chunks
        time.sleep(delay_between_chunks)

    print("Random data successfully written to /dev/ttyUSB0")

except serial.SerialException as e:
    print(f"Error opening serial port: {e}")
except Exception as e:
    print(f"An error occurred: {e}")
finally:
    # Close the serial port
    ser.close()

The reason for the issue at 115200 baud rate is that the internal FIFO buffer gets filled up quickly, causing data loss. However, for smaller data packets, transmission at 115200 baud works correctly.

We are actively working on a solution, and a new updated package will be released soon to address this issue.

[Shubh150]

Thank you for the updated version of Periplex, however now I am not able to open ttyPERI0 port on minicom…it is giving me the following error :-

I have configured 3 UART ports :-

Also, it would be really helpful if you could provide something like a patch note for the current update of Periplex.

[vatsal]

Make sure to do this: After installing Periplex 0.0.2, run the periplex-sync command again to generate 3 UARTs.

Can you provide the service log, Periplex version, dmesg log, and kernel details?

For service log:

• sudo systemctl status periplexer.service > service_log.txt

To check the version of the Periplex:

• apt info periplex

For dmesg log:

• sudo dmesg > dmesg.txt

To check kernel details:

• uname -a

[Shubh150]

Here are the following details :-

vicharak@vicharak:~$ uname -a
Linux vicharak 5.10.233-vaaman #vaaman SMP Tue Mar 25 16:49:58 IST 2025 aarch64 aarch64 aarch64 GNU/Linux
vicharak@vicharak:~$ apt info periplex
Package: periplex
Version: 0.0.2
Priority: optional
Section: admin
Maintainer: vatsal vhkevadiya15@gmail.com
Installed-Size: 120 kB
Depends: libxml2-dev, libcjson-dev, libsqlite3-dev, curl, libwebsockets-dev, libjson-c-dev, libssl-dev, libcurl4-gnutls-dev, rah-service (>= 1.2.0), vicharak-config (>= 0.1.6), linux-image-5.10.233-vaaman, bitman
Conflicts: linux-image-5.10.160-vaaman, linux-image-5.10.226-vaaman, linux-image-5.10.228-vaaman, linux-image-5.10.230-vaaman
Download-Size: 26.6 kB
APT-Sources: http://apt.vicharak.in stable-vaaman/vaaman arm64 Packages
Description: Generate peripherals on the demand
Periplex gives Users access to create peripherals to the existing board using the FPGA on vaaman.

N: There is 1 additional record. Please use the ‘-a’ switch to see it

dmesg_01_04_25.txt (42.8 KB)
service_log.txt (498 Bytes)

[vatsal]

Can you provide the rah-service log and once check the overlays settings for
Vaaman FPGA communication overlay is enable ?

For rah-service log:
sudo systemctl status rah.service > rah_log.txt

For check the overlays settings, follow below steps:
Step-1 : Run the command sudo vicharak-config
Step-2 : Select the Overlays options.
Step-3 : after selecting the Overlays Navigate to the Manage Overlays.
step-4 : Enable the Enable Vaaman FPGA communication overlay.

Note: if the Enable Vaaman FPGA communication overlay is not visible in the Manage Overlays checkbox, please send me a screenshot of the checkbox settings.

[Shubh150]

Vaaman FPGA overlay checkbox overlay isn’t visible.

Here is the rah-service log :-

● rah.service - Rah Service
Loaded: loaded (/etc/systemd/system/rah.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2023-11-22 02:27:22 IST; 1 year 4 months ago
Main PID: 1539 (rah_service)
Tasks: 3 (limit: 2303)
Memory: 8.4M
CPU: 299ms
CGroup: /system.slice/rah.service
└─1539 /usr/bin/rah_service

Nov 22 02:27:22 vicharak rah_service[1539]: using card ‘/dev/dri/card0’
Nov 22 02:27:22 vicharak rah_service[1539]: mode for connector 139 is 1280x1024