Arduino board run on Mbed-os6.8.1 (only test purpose not official). Need Mbed Studio(1.3.1) not online compiler. If you compile on the online compiler, you can get a hex file but it does NOT work!!!

Dependencies:   APDS_9960 LPS22HB LSM9DS1 HTS221

1) DAPLink(LPC11U35)の準備
使用したボード →https://akizukidenshi.com/catalog/g/gK-12144/
プログラムは、nRF52840-MDK用に公開されているDAPLinkのコンパイル済のバイナリコードを使わせていただきました。
https://github.com/makerdiary/nrf52840-mdk/tree/master/firmware/daplink
LPC11U35への書込みは、SW1(ISP)を押したままSW2(RESET)を操作するとPCに「CRP DISABLD」という名称でマウントされるので、書込まれているfirmware.binを削除してから、上記のbinファイルをコピーすれば書き込みが行われます。
書込み完了後にSW1を押さずに起動すれば、「DAPLINK」として認識されます。
DETAILS.TXTでDAPLinkの内容を確認できます。

2) 接続

Arduino Nano 33 BLE SenseLPC11U35 Interface CPUコメント
J3:Pin2 (ボード裏のパッド)CN1:Pin3 P0_7SWDIO
J3:Pin3 (ボード裏のパッド)CN1:Pin4 P0_8SWCLK
JP2:Pin14  GNDCN2:Pin1 GNDGND

https://os.mbed.com/media/uploads/kenjiArai/snano_daplink.jpg https://os.mbed.com/media/uploads/kenjiArai/snano33ble_bottom.jpg
3)USBSerial
シリアル出力は、NANO 33 BLE SENSEボードのUSB端子経由で出力されます。

4)Mbed Studio 1.3.1を使って開発のこと!(オンラインコンパイラでは動作しません!)
https://os.mbed.com/media/uploads/kenjiArai/s1_2020-02-13.png https://os.mbed.com/media/uploads/kenjiArai/s2_2020-02-13.png

5)ボードピン配置 https://os.mbed.com/media/uploads/kenjiArai/nano33ble_pin.png

Revision:
1:cce280da16d4
Parent:
0:f1a10797d9f6
--- a/5_Combined_enviromental_sensors/main5.cpp	Fri Feb 07 01:21:16 2020 +0000
+++ b/5_Combined_enviromental_sensors/main5.cpp	Sun Feb 28 07:31:58 2021 +0000
@@ -1,13 +1,13 @@
 /*
  * Mbed Application program
- *  Nano 33 BLE Sense board runs on mbed-OS5
+ *  Nano 33 BLE Sense board runs on mbed-OS6
  *      HTS221 + LSM9DS1 + LPS22HB sensors
  *
- * Copyright (c) 2020 Kenji Arai / JH1PJL
+ * Copyright (c) 2020,'21 Kenji Arai / JH1PJL
  *      http://www7b.biglobe.ne.jp/~kenjia/
  *      https://os.mbed.com/users/kenjiArai/
  *      Started:    January   22nd, 2020
- *      Revised:    Feburary   7th, 2020
+ *      Revised:    February  28th, 2021
  */
 
 //  Pre-selection --------------------------------------------------------------
@@ -18,18 +18,15 @@
 //  Include --------------------------------------------------------------------
 #include    "mbed.h"
 #include    "nano33blesense_iodef.h"
-#include    "USBSerial.h"
 #include    "LPS22HB.h"
 #include    "LSM9DS1.h"
 #include    "HTS221.h"
-#include    "glibr.h"
 
 //  Definition -----------------------------------------------------------------
 
 //  Object ---------------------------------------------------------------------
 DigitalOut      sen_pwr(PIN_VDD_ENV, 1);
 DigitalOut      i2c_pullup(PIN_I2C_PULLUP, 1);
-RawSerial       pc(STDIO_UART_TX, STDIO_UART_RX, 115200);
 DigitalOut      led_y(PIN_YELLOW, 0);
 DigitalOut      led_g(PIN_GREEN, 0);
 DigitalOut      lr(PIN_LR, 1);
@@ -44,13 +41,16 @@
 //  RAM ------------------------------------------------------------------------
 
 //  ROM / Constant data --------------------------------------------------------
-const char *const msg0 = "Run Nano 33 BLE Sense module on Mbed-os5.15.0";
-const char *const msg1 = "Compiled on Mbed Studio:0.8.1";
+const char *const msg0 = "Run Nano 33 BLE Sense module on Mbed-os";
+const char *const msg1 = "Compiled on Mbed Studio:1.3.1";
 const char *const msg2 = "Target is ARDUINO_NANO33BLE with Debug mode";
 
 //  Function prototypes --------------------------------------------------------
-extern void check_i2c_connected_devices(void);
-extern void check_i2c_sensors(void);
+
+//  subroutin (must be at this below line and do NOT change order) -------------
+#include    "usb_serial_as_stdio.h"
+#include    "check_revision.h"
+#include    "common.h"
 
 //------------------------------------------------------------------------------
 //  Control Program
@@ -60,11 +60,13 @@
     HTS221::HTS221_status_t aux;
     HTS221::HTS221_data_t   hum_data;
 
+    usb_serial_initialize();
+    print_revision();
     led_y = 1;
     i2c_pullup = 1;
     sen_pwr = 1;
-    pc.printf("\r\n%s\r\n%s\r\n%s\r\n", msg0, msg1, msg2);
-    thread_sleep_for(200);
+    print_usb("%s\r\n%s\r\n%s\r\n", msg0, msg1, msg2);
+    ThisThread::sleep_for(200ms);
     imu  = new LSM9DS1(PIN_SDA1, PIN_SCL1);
     baro = new LPS22HB(i2c, LPS22HB_G_CHIP_ADDR);
     hum  = new HTS221(PIN_SDA1, PIN_SCL1,HTS221::HTS221_ADDRESS, 400000);
@@ -100,24 +102,25 @@
         imu->readTemp();
         float press = baro->pressure();
         float temp = baro->temperature();
-        uint32_t passed_time = t.read_ms();
+        uint32_t passed_time = chrono::duration_cast<chrono::milliseconds>(
+                               t.elapsed_time()).count();
         lb = 1;
         // Showing
         lr = 0;
         lg = 0;
         lb = 0;
-        pc.printf("Temperature[degC]: HTS221= %+4.1f, ", hum_data.temperature);
-        pc.printf("LPS22HB= %+4.1f, LSM9DS1= %+4.1f, ",
+        print_usb("Temperature[degC]: HTS221=,%+4.1f,", hum_data.temperature);
+        print_usb("LPS22HB=,%+4.1f,LSM9DS1=,%+4.1f,",
                   temp, imu->temperature_c);
-        pc.printf("Humidity[RH %%]: HTS221= %3.1f, ", hum_data.humidity);
-        pc.printf("Pressure[hPa]: LPS22H= %6.2f, ",  press);
+        print_usb("Humidity[RH %%]: HTS221=,%3.1f,", hum_data.humidity);
+        print_usb("Pressure[hPa]: LPS22H=,%6.2f,",  press);
         ++n;
-        pc.printf("processing time: %d [ms], count: %4d\r\n", passed_time, n);
+        print_usb("processing time:,%2d,[ms],count:,%4d\r\n", passed_time, n);
         lr = 1;
         lg = 1;
         lb = 1;
         if (passed_time < 999){
-            thread_sleep_for(1000 - t.read_ms());
+            ThisThread::sleep_for(chrono::milliseconds(1000 - passed_time));
         }
     }
 }