I ma supposed to read FA0A03048100020000F , BUT I END UP READING FA0A030482000202020202. This is also common with the peripheral i am trying to interact, It sends a packet every 1second and i always read only first 5 byes but that too in incorrect order
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/*
* Copyright (c) 2022 Libre Solar Technologies GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <device.h>
#include <drivers/uart.h>
#include <string.h>
#include <sys/printk.h>
/* Change this to any other UART peripheral if desired */
#define UART_DEVICE_NODE DT_NODELABEL(uart1)
#define RX_BUF_SIZE 10 // Expecting 10-byte packets
#define MSG_Q_SIZE 10 // Queue to store 10 messages
/* Queue to store received messages */
K_MSGQ_DEFINE(uart_msgq, RX_BUF_SIZE, MSG_Q_SIZE, 4);
static const struct device *uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);
/* Receive buffer */
static uint8_t rx_buf[RX_BUF_SIZE];
static int rx_buf_pos = 0;
/*
* UART interrupt callback for receiving hex data
*/
void serial_cb(const struct device *dev, void *user_data)
{
uint8_t c,d;
if (!uart_irq_update(uart_dev)) {
return;
}
while (uart_irq_rx_ready(uart_dev)) {
uart_fifo_read(uart_dev, &d, 1);
if(d==0xFA)
{
for(int i=0;i<=10;i++)
{
uart_poll_in(uart_dev,&c);
rx_buf[i]=c;
rx_buf_pos=i;
k_msleep(1);
}
// while(rx_buf_pos<=RX_BUF_SIZE)
// uart_fifo_read(uart_dev, &c, 1);
// rx_buf[rx_buf_pos++] = c;
}
/* If we've received the expected number of bytes, process the packet */
if (rx_buf_pos >= RX_BUF_SIZE) {
k_msgq_put(&uart_msgq, &rx_buf, K_NO_WAIT);
rx_buf_pos = 0; // Reset buffer position for the next packet
d=0;
}
}
}
/*
* Print received data in hex format
*/
void print_hex(uint8_t *buf, int len)
{
printk("Received: ");
for (int i = 0; i < len; i++) {
printk("%02X ", buf[i]); // Print each byte as hex
}
printk("\r\n");
}
void main(void)
{
uint8_t tx_buf[RX_BUF_SIZE];
if (!device_is_ready(uart_dev)) {
printk("UART device not found!\r\n");
return;
}
/* Configure interrupt and callback to receive data */
uart_irq_callback_user_data_set(uart_dev, serial_cb, NULL);
uart_irq_rx_enable(uart_dev);
printk("UART Hex Receiver Ready.\r\n");
/* Wait for input and print received hex data */
while (k_msgq_get(&uart_msgq, &tx_buf, K_FOREVER) == 0) {
print_hex(tx_buf, RX_BUF_SIZE);
}
}
