Is there a way to test that the RXD and TXD pins are sending and receiving data on the nrf5340? I am trying to connect these pins to the u-blox ANT-B10-00C using male to female jumper cables but when I try this setup, my serial terminal is not outputting any data.
I believe I have set everything up correctly. Below is part of my overlay file for uart2. I have the RX pin of the nrf5340 connected to the TX pin of the ANT-B10-00C and the TX pin of the nrf5340 connected to the RX pin of the ANT-B10-00C. However, when I set the communication up, nothing is being outputted to my serial terminal.
This is the code I am trying to run:
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/sys/printk.h>
#include <string.h>
#define UART_DEVICE_NODE DT_NODELABEL(uart2) // Use UART2
const struct device *uart_dev;
int main(void) {
uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);
if (!device_is_ready(uart_dev)) {
printk("ERROR: UART2 not ready!\n");
return -1; // Indicate error
}
printk("UART2 communication test started...\n");
const char *test_msg = "Hello ANT-B10!\r\n";
while (1) {
// Send message to ANT-B10
uart_fifo_fill(uart_dev, (const uint8_t *)test_msg, strlen(test_msg));
printk("Sent: %s", test_msg);
k_sleep(K_MSEC(100)); // Short delay
// Check for response
uint8_t buffer[32];
int recv_len = uart_fifo_read(uart_dev, buffer, sizeof(buffer) - 1);
if (recv_len > 0) {
buffer[recv_len] = '\0'; // Null-terminate received data
printk("Received from ANT-B10: %s", buffer);
} else {
printk("No response yet...\n");
}
k_sleep(K_SECONDS(2)); // Repeat every 2 seconds
}
return 0; // Indicate success
}
Would you happen to know why nothing is happening in my terminal?