I am encountering an issue with reading data from UART2 on my Raspberry Pi using GPIO pins 0 and 3. I have configured the system to enable UART and specified dtoverlay=uart2 in the config.txt file. Below is the C code I am using to read data from UART2:
Despite this setup, I am unable to receive any data from UART2. I have confirmed that the UART is enabled (enable_uart=1) and that the dtoverlay=uart2 is properly configured in the config.txt file.
If anyone has insights into why the data reception might be failing in this context, I would greatly appreciate any guidance or troubleshooting steps.
Thank you.
Code:
#include <stdio.h>#include <string.h>#include <errno.h>#include <wiringSerial.h>int main() { int uart_fd; char buffer[256]; // Open the serial connection (UART2) at baud rate 115200 if ((uart_fd = serialOpen("/dev/ttyS1", 115200)) < 0) { fprintf(stderr, "Error opening UART: %s\n", strerror(errno)); return 1; } // Continuously read data from UART2 while (1) { if (serialDataAvail(uart_fd) > 0) { // If data is available, read it into the buffer int len = serialRead(uart_fd, buffer, sizeof(buffer) - 1); if (len > 0) { buffer[len] = '\0'; // Null-terminate the string printf("Received data: %s\n", buffer); } } } return 0;}If anyone has insights into why the data reception might be failing in this context, I would greatly appreciate any guidance or troubleshooting steps.
Thank you.
Statistics: Posted by neekamp — Tue Apr 30, 2024 6:51 pm