Hello and thanks for reading. Our device needs to act as both a central and peripheral. I have written all the peripheral code, and its all working perfectly. However, once I started writing code for the central role, I discovered a bug that I cant quite figure out.
Our device seems to start scanning fine, but then randomly resets, typically after about ten seconds of scanning. I have tried commenting out most, or even all, of the peripheral code, in order try and isolate the problem, but without success. I have also reduced the central code to just scan indefinitely, it doesnt even try to connect.
Is there anything obviously wrong you can see? All of the relevant code is below as follows:
prj.config:
#GPIO CONFIG_GPIO=y CONFIG_PINCTRL=y #UART & SERIAL CONFIG_SERIAL=y CONFIG_NEWLIB_LIBC=y CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y CONFIG_THREAD_STACK_INFO=y CONFIG_THREAD_MONITOR=y CONFIG_INIT_STACKS=y CONFIG_STACK_SENTINEL=y CONFIG_MAIN_STACK_SIZE=16384 CONFIG_LOG=y CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=8192 CONFIG_HEAP_MEM_POOL_SIZE=8192 #CPP CONFIG_CPP=y CONFIG_REQUIRES_FULL_LIBCPP=y CONFIG_STD_CPP20=y #i2C CONFIG_I2C=y #spi CONFIG_SPI=y #flash CONFIG_SETTINGS=y CONFIG_FLASH=y CONFIG_FLASH_PAGE_LAYOUT=y CONFIG_NVS=y CONFIG_FLASH_MAP=y CONFIG_MPU_ALLOW_FLASH_WRITE=y CONFIG_FILE_SYSTEM=y CONFIG_SOC_FLASH_NRF=y #math CONFIG_CMSIS_DSP=y CONFIG_NEWLIB_LIBC=y CONFIG_FPU=y CONFIG_CMSIS_DSP_FILTERING=y #BLE CONFIG_BT=y CONFIG_BT_SETTINGS=y CONFIG_BT_GATT_CLIENT=y CONFIG_BT_PERIPHERAL=y CONFIG_BT_DEBUG_LOG=y CONFIG_BT_CENTRAL=y CONFIG_BT_BROADCASTER=y CONFIG_BT_OBSERVER=y CONFIG_BT_DEVICE_NAME_DYNAMIC=y CONFIG_BT_DEVICE_NAME_MAX=30 #NUS CONFIG_BT_NUS=y CONFIG_BT_NUS_AUTHEN=n #BT BATTERY SERVICE (BAS) CONFIG_BT_BAS=y #DIS CONFIG_BT_DIS=y #all non-pnp DIS settings are done dynamically CONFIG_BT_DIS_PNP=n CONFIG_SETTINGS_RUNTIME=y CONFIG_BT_DIS_SETTINGS=y CONFIG_BT_DIS_MODEL="GENERIC" CONFIG_BT_DIS_MANUF="" CONFIG_BT_DIS_SERIAL_NUMBER=y CONFIG_BT_DIS_FW_REV=y CONFIG_BT_DIS_HW_REV=y CONFIG_BT_DIS_SW_REV=y CONFIG_BT_DIS_SERIAL_NUMBER_STR="xxxxxxxx" CONFIG_BT_DIS_FW_REV_STR="0" CONFIG_BT_DIS_HW_REV_STR="0" CONFIG_BT_DIS_SW_REV_STR="0" #BT HID CONFIG_NCS_SAMPLES_DEFAULTS=y # CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=3 CONFIG_BT_MAX_CONN=6 # CONFIG_BT_MAX_PAIRED=5 CONFIG_BT_SMP=y CONFIG_BT_L2CAP_TX_BUF_COUNT=5 CONFIG_BT_DEVICE_APPEARANCE=962 CONFIG_BT_HIDS=y CONFIG_BT_HIDS_MAX_CLIENT_COUNT=2 CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y CONFIG_BT_GATT_UUID16_POOL_SIZE=40 CONFIG_BT_GATT_CHRC_POOL_SIZE=20 CONFIG_BT_CONN_CTX=y CONFIG_BT_USER_DATA_LEN_UPDATE=y CONFIG_BT_BUF_ACL_RX_SIZE=251 CONFIG_BT_BUF_ACL_TX_SIZE=251 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 CONFIG_BT_L2CAP_TX_MTU=247 CONFIG_BT_ATT_PREPARE_COUNT=4 CONFIG_BT_CONN_TX_MAX=10 CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y CONFIG_BT_PERIPHERAL_PREF_MIN_INT=6 CONFIG_BT_PERIPHERAL_PREF_MAX_INT=24 CONFIG_BT_PERIPHERAL_PREF_LATENCY=0 CONFIG_BT_PERIPHERAL_PREF_TIMEOUT=400 #ADC CONFIG_ADC=y CONFIG_ADC_ASYNC=y #timer CONFIG_COUNTER=y #52840 specific CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=3 CONFIG_BT_MAX_PAIRED=5 CONFIG_CONSOLE=y CONFIG_UART_CONSOLE=y CONFIG_UART_LINE_CTRL=y CONFIG_USB_DEVICE_STACK=y CONFIG_USB_DEVICE_PRODUCT="console" CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n
And the relevant code:
//std libraries
#include <stddef.h>
#include <errno.h>
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
//zephyr basic libraries
#include <zephyr/types.h>
#include <zephyr/sys/printk.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/logging/log.h>
#include <zephyr/drivers/gpio.h>
//zephyr BLE
#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/hci.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/bluetooth/uuid.h>
#include <zephyr/bluetooth/att.h>
#include <bluetooth/services/nus.h>
#include <zephyr/sys/byteorder.h>
#include "BLE_Central.h"
#include "BLE.h"
#include "BLE_Commands.h"
#include "NTP_Time.h"
#include "NUS.h"
static void device_found(const bt_addr_le_t *addr, int8_t rssi, uint8_t type,struct net_buf_simple *ad)
{
char addr_str[BT_ADDR_LE_STR_LEN];
int err;
if (default_conn) {
return;
}
/* We're only interested in connectable events */
if (type != BT_GAP_ADV_TYPE_ADV_IND &&
type != BT_GAP_ADV_TYPE_ADV_DIRECT_IND) {
return;
}
bt_addr_le_to_str(addr, addr_str, sizeof(addr_str));
printk("Device found: %s (RSSI %d)\n", addr_str, rssi);
}
int Central_Connect_And_Sync()
{
bt_enable(NULL);
settings_load();
int err = bt_le_scan_start(BT_LE_SCAN_PASSIVE, device_found);
if (err)
{
printk("Scanning failed to start (err %d)\n", err);
return;
}
return false;
}
