nano33ble: compatibility with ArduinoBLE via HCI_RAW

Author: facchinm

loader/boards/arduino_nano_33_ble_sense.conf

@@ -1,11 +1,22 @@
 CONFIG_BT=y
-CONFIG_BT_SMP=y
-CONFIG_BT_PERIPHERAL=y
-CONFIG_BT_CENTRAL=y
-CONFIG_BT_DIS=y
-CONFIG_BT_DIS_PNP=n
-CONFIG_BT_BAS=y
-CONFIG_BT_HRS=y
+
+CONFIG_BT_HCI_RAW=y
+CONFIG_BT_HCI_RAW_H4=y
+CONFIG_BT_HCI_RAW_H4_ENABLE=y
+CONFIG_BT_BUF_ACL_RX_SIZE=255
+CONFIG_BT_BUF_CMD_TX_SIZE=255
+CONFIG_BT_BUF_EVT_DISCARDABLE_SIZE=255
+CONFIG_BT_MAX_CONN=4
+CONFIG_BT_TINYCRYPT_ECC=n
+CONFIG_BT_CTLR_ADV_EXT=y
+CONFIG_BT_CTLR_ADV_PERIODIC=y
+
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+
+# Workaround: Unable to allocate command buffer when using K_NO_WAIT since
+# Host number of completed commands does not follow normal flow control.
+CONFIG_BT_BUF_CMD_TX_COUNT=10
+
 
 CONFIG_USB_DEVICE_STACK=y
 CONFIG_USB_DEVICE_PRODUCT="Arduino Nano 33 BLE"
@@ -19,4 +30,17 @@ CONFIG_UART_LINE_CTRL=y
 CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT=y
 
 CONFIG_ADC=y
-CONFIG_PWM=y
+CONFIG_PWM=y
+
+CONFIG_LLEXT_STORAGE_WRITABLE=n
+CONFIG_SHELL_STACK_SIZE=1024
+CONFIG_HEAP_MEM_POOL_SIZE=32000
+CONFIG_LLEXT_HEAP_SIZE=96
+CONFIG_MAIN_STACK_SIZE=64768
+
+CONFIG_BT_RX_STACK_SIZE=4096
+CONFIG_BT_HCI_TX_STACK_SIZE=4096
+
+CONFIG_STACK_USAGE=y
+CONFIG_STACK_SENTINEL=n
+CONFIG_STACK_CANARIES=y

loader/llext_exports.c

@@ -1,4 +1,5 @@
 #include <string.h>
+#include <strings.h>
 #include <zephyr/llext/symbol.h>
 #include <zephyr/usb/usb_device.h>
 #include <ctype.h>
@@ -14,6 +15,8 @@ EXPORT_SYMBOL(strrchr);
 EXPORT_SYMBOL(strstr);
 EXPORT_SYMBOL(strncmp);
 EXPORT_SYMBOL(strncpy);
+EXPORT_SYMBOL(strcasecmp);
+EXPORT_SYMBOL(strtoul);
 EXPORT_SYMBOL(strcmp);
 EXPORT_SYMBOL(strlen);
 EXPORT_SYMBOL(strchr);
@@ -56,6 +59,17 @@ FORCE_EXPORT_SYM(net_dhcpv4_add_option_callback);
 FORCE_EXPORT_SYM(net_mgmt_add_event_callback);
 #endif
 
+#if defined(CONFIG_BT)
+FORCE_EXPORT_SYM(bt_enable_raw);
+FORCE_EXPORT_SYM(bt_hci_raw_set_mode);
+FORCE_EXPORT_SYM(bt_send);
+FORCE_EXPORT_SYM(net_buf_get);
+FORCE_EXPORT_SYM(bt_buf_get_tx);
+FORCE_EXPORT_SYM(net_buf_simple_pull);
+FORCE_EXPORT_SYM(net_buf_simple_add_mem);
+FORCE_EXPORT_SYM(net_buf_simple_pull_mem);
+FORCE_EXPORT_SYM(net_buf_unref);
+#endif
 
 #if defined(CONFIG_NET_SOCKETS)
 FORCE_EXPORT_SYM(getaddrinfo);

loader/prj.conf

@@ -14,13 +14,13 @@ CONFIG_MAIN_STACK_SIZE=32768
 CONFIG_ARDUINO_API=n
 
 CONFIG_SHELL=y
-CONFIG_SHELL_STACK_SIZE=32768
+CONFIG_SHELL_STACK_SIZE=2048
 CONFIG_SHELL_CMD_BUFF_SIZE=2048
 CONFIG_SHELL_LOG_LEVEL_DBG=n
 
 CONFIG_LLEXT=y
 CONFIG_LLEXT_LOG_LEVEL_ERR=y
-CONFIG_LLEXT_HEAP_SIZE=64
+CONFIG_LLEXT_HEAP_SIZE=32
 CONFIG_LLEXT_SHELL=y
 CONFIG_LLEXT_STORAGE_WRITABLE=y
 CONFIG_LLEXT_EXPORT_DEVICES=y

variants/llext/linker_script.ld

@@ -53,6 +53,10 @@ SECTIONS {
         KEEP(*(.init_array))
     }
 
+    .fini_array : {
+        KEEP(*(.fini_array))
+    }
+
     .symtab : {
         KEEP(*(.symtab))
     }