Issues with RX Callback Function in DW3xxx – Not Triggering Properly

Wireless Connectivity Ultra-Wideband
1

“I am working with the DW3xxx UWB module and using the interrupt-driven callback mechanism for receiving data. I have set up the dwt_setcallbacks() function to register my callback handlers. However, my RX callback (rx_listener_cb()) does not always trigger when a packet is received.”

here how i am trying

dwt_setcallbacks(NULL, rx_listener_cb, listener_error_cb, NULL, NULL);

void rx_listener_cb(const dwt_cb_data_t *rxd)
{
char str[MAX_STR_SIZE];

// Read the status register to check the interrupt source
uint32_t status = dwt_readsysstatus();
sprintf(str, "[DEBUG] ISR triggered. SYS_STATUS: 0x%08X\r\n", status);
reporter_instance.print(str, strlen(str));

// Check if a frame has been successfully received
if (status & DWT_INT_RXFCG_BIT_MASK) {
    sprintf(str, "[SUCCESS] RX Frame received!\r\n");
    reporter_instance.print(str, strlen(str));

    // Read received frame data
    blink_msg_t rx_blink;
    dwt_readrxdata((uint8_t*)&rx_blink, sizeof(blink_msg_t), 0);

    sprintf(str, "[SUCCESS] Blink received! SeqNum: %d\r\n", rx_blink.seqNum);
    reporter_instance.print(str, strlen(str));

    // Clear RX event flag
    dwt_writesysstatus(DWT_INT_RXFCG_BIT_MASK);
}

// Enable receiver for next frame
dwt_rxenable(DWT_START_RX_IMMEDIATE);

}
Interrupt Configuration and Reception:

void f_listen()
{
char str[200];

// Soft Reset before Initialization
CMD_ENTER_CRITICAL();
restore_bssConfig();
CMD_EXIT_CRITICAL();

// Initialize DW3xxx
if (dwt_initialise(DWT_DW_INIT) != DWT_SUCCESS) {
    sprintf(str, "[ERROR] dwt_initialise() failed!\r\n");
    reporter_instance.print(str, strlen(str));
    return;
}

// Register Callbacks
dwt_setcallbacks(NULL, rx_listener_cb, listener_error_cb, NULL, NULL);
sprintf(str, "[DEBUG] Callbacks registered successfully!\r\n");
reporter_instance.print(str, strlen(str));

// Enable Interrupts for RX
dwt_setinterrupt(DWT_INT_RXFCG_BIT_MASK, 1);

// Start Listening Mode
dwt_rxenable(DWT_START_RX_IMMEDIATE);
sprintf(str, "[DEBUG] RX Mode Enabled\r\n");
reporter_instance.print(str, strlen(str));

}
now the problem is * The rx_listener_cb() callback does not always trigger when a packet is received.

  • I confirmed that frames are being transmitted, but sometimes the RX interrupt (DWT_INT_RXFCG_BIT_MASK) does not fire.
  • In some cases, the callback triggers but the dwt_readrxdata() function returns incorrect or empty data.

Is my callback function rx_listener_cb() correctly implemented?
Do I need to manually clear the interrupt flag using dwt_writesysstatus()?
What could cause the callback to not trigger every time a frame is received?
Are there additional interrupt flags I should enable in dwt_setinterrupt()?
Should I re-enable RX (dwt_rxenable()) inside the callback or outside?