main4.cpp

00001 /*
00002  * Mbed Application program
00003  *  Nano 33 BLE Sense board runs on mbed-OS6
00004  *  HTS221 -> Capacitive digital sensor for relative humidity and temperature
00005  *      by STMicroelectronics
00006  *
00007  * Copyright (c) 2020,'21 Kenji Arai / JH1PJL
00008  *      http://www7b.biglobe.ne.jp/~kenjia/
00009  *      https://os.mbed.com/users/kenjiArai/
00010  *      Started:    January   22nd, 2020
00011  *      Revised:    February  28th, 2021
00012  */
00013 
00014 //  Pre-selection --------------------------------------------------------------
00015 #include    "select_example.h"
00016 //#define EXAMPLE_4_CHECK_HTS221
00017 #ifdef EXAMPLE_4_CHECK_HTS221
00018 
00019 //  Include --------------------------------------------------------------------
00020 #include    "mbed.h"
00021 #include    "nano33blesense_iodef.h"
00022 #include    "HTS221.h"
00023 
00024 //  Definition -----------------------------------------------------------------
00025 
00026 //  Constructor ----------------------------------------------------------------
00027 DigitalOut      sen_pwr(PIN_VDD_ENV, 1);
00028 DigitalOut      i2c_pullup(PIN_I2C_PULLUP, 1);
00029 I2C             i2c(PIN_SDA1, PIN_SCL1);
00030 HTS221          *hum = NULL;
00031 Timer           t;
00032 
00033 //  RAM ------------------------------------------------------------------------
00034 
00035 //  ROM / Constant data --------------------------------------------------------
00036 
00037 //  Function prototypes --------------------------------------------------------
00038 
00039 //  subroutin (must be at this below line and do NOT change order) -------------
00040 #include    "usb_serial_as_stdio.h"
00041 #include    "check_revision.h"
00042 #include    "common.h"
00043 
00044 //------------------------------------------------------------------------------
00045 //  Control Program
00046 //------------------------------------------------------------------------------
00047 int main()
00048 {
00049     HTS221::HTS221_data_t   hum_data;
00050 
00051     usb_serial_initialize();
00052     print_revision();
00053     i2c_pullup = 1;
00054     sen_pwr = 1;
00055     print_usb("Check LSM9DS1\r\n");
00056     ThisThread::sleep_for(200ms);
00057     //  check I2C line
00058     check_i2c_connected_devices();
00059     hum = new HTS221(PIN_SDA1, PIN_SCL1,HTS221::HTS221_ADDRESS, 400000);
00060     hum->HTS221_GetDeviceID (&hum_data);
00061     uint8_t id = hum_data.deviceID;
00062     if (id == HTS221::WHO_AM_I_VALUE) {
00063         print_usb("HTS221 is ready. ID = 0x%x\r\n", id);
00064     } else {
00065         print_usb("HTS221 is NOT ready. return value = 0x%x\r\n", id);
00066     }
00067     uint32_t n = 0;
00068     while(true) {
00069         t.reset();
00070         t.start();
00071         hum->HTS221_SetOneShot();
00072         do {
00073             thread_sleep_for(2);
00074             hum->HTS221_GetOneShot(&hum_data);
00075         } while(hum_data.one_shot == HTS221::CTRL_REG2_ONE_SHOT_WAITING);
00076         hum->HTS221_GetCalibrationCoefficients (&hum_data);
00077         hum->HTS221_GetTemperature(&hum_data);
00078         hum->HTS221_GetHumidity(&hum_data);
00079         print_usb("Temperature:,%0.1f,[degC],RH:,%0.1f,[%%],",
00080                     hum_data.temperature, hum_data.humidity);
00081         ++n;
00082         uint32_t passed_time = chrono::duration_cast<chrono::milliseconds>(
00083                                t.elapsed_time()).count();
00084         print_usb("processing time:,%2d,[ms],count:,%4d\r\n", passed_time, n);
00085         if (passed_time < 999){
00086             ThisThread::sleep_for(chrono::milliseconds(1000 - passed_time));
00087         }
00088     }
00089 }
00090 
00091 #endif // EXAMPLE_4_CHECK_HTS221