Diff: HDC1000.cpp

Revision:

0:927110422689

Child:

1:c8f2c01befe1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HDC1000.cpp	Sun Feb 22 01:04:44 2015 +0000
@@ -0,0 +1,134 @@
+/*
+ * mbed library program
+ *  Low Power, High Accuracy Digital Humidity Sensor with Integrated Temperature Sensor
+ *  HDC1000 Texas Instruments
+ *
+ * Copyright (c) 2015 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Created: Feburary   9th, 2015
+ *      Revised: Feburary  22nd, 2015
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
+ * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "HDC1000.h"
+
+HDC1000::HDC1000 (PinName p_sda, PinName p_scl) : _i2c(p_sda, p_scl)
+{
+    HDC1000_addr = HDC1000ADDR;
+    init();
+}
+
+HDC1000::HDC1000 (PinName p_sda, PinName p_scl, uint8_t addr) : _i2c(p_sda, p_scl)
+{
+    HDC1000_addr = addr;
+    init();
+}
+
+HDC1000::HDC1000 (I2C& p_i2c) : _i2c(p_i2c)
+{
+    HDC1000_addr = HDC1000ADDR;
+    init();
+}
+
+HDC1000::HDC1000 (I2C& p_i2c, uint8_t addr) : _i2c(p_i2c)
+{
+    HDC1000_addr = addr;
+    init();
+}
+
+/////////////// Start conv. and gwt all data //////////////
+void HDC1000::get()
+{
+
+    dt[0] = HDC1000_REG_TEMP;
+    _i2c.write((int)HDC1000_addr, (char *)dt, 1, true);
+    wait_ms(15);
+    _i2c.read((int)HDC1000_addr, (char *)dt, 4, false);
+    temp = dt[0] << 8 | dt[1];
+    humi = dt[2] << 8 | dt[3];
+}
+
+/////////////// Read data from sensor /////////////////////
+float HDC1000::temperature()
+{
+    return (float)temp * 165 / 65536 - 40;
+}
+
+/////////////// Read data from sensor /////////////////////
+float HDC1000::humidity()
+{
+    return (float)humi * 100 / 65536;
+}
+
+/////////////// Initialize ////////////////////////////////
+void HDC1000::init()
+{
+    _i2c.frequency(100000);
+    get_IDs();
+    set_config(BOTH_T_14_H_14);
+}
+
+/////////////// ID ////////////////////////////////////////
+uint16_t HDC1000::read_M_ID()
+{
+    return manufacturer_id_number;
+}
+
+uint16_t HDC1000::read_D_ID()
+{
+    return device_id_number;
+}
+
+uint8_t HDC1000::who_am_i()
+{
+    if (device_id_number == I_AM_HDC1000) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+/////////////// Configration //////////////////////////////
+uint16_t HDC1000::set_config(uint16_t cfg)
+{
+    dt[0] = HDC1000_REG_CONFIG;
+    dt[1] = (uint8_t)(cfg >> 8);
+    dt[2] = (uint8_t)(cfg & 0xff);
+    _i2c.write((int)HDC1000_addr, (char *)dt, 3, false);
+    return read_config();
+}
+
+uint16_t HDC1000::read_config(void)
+{
+    dt[0] = HDC1000_REG_CONFIG;
+    _i2c.write((int)HDC1000_addr, (char *)dt, 1, true);
+    _i2c.read(HDC1000_addr, (char *)dt, 2, false);
+    return (uint16_t)(dt[0] << 8 | dt[1]);
+}
+
+/////////////// I2C Freq. /////////////////////////////////
+void HDC1000::frequency(int hz)
+{
+    _i2c.frequency(hz);
+}
+
+/////////////// Read ID ///////////////////////////////////
+void HDC1000::get_IDs()
+{
+    // Manufacturer ID
+    dt[0] = HDC1000_REG_M_ID;
+    _i2c.write((int)HDC1000_addr, (char *)dt, 1, true);
+    _i2c.read(HDC1000_addr, (char *)dt, 2, false);
+    manufacturer_id_number = dt[0] << 8 | dt[1];
+    // Device ID
+    dt[0] = HDC1000_REG_D_ID;
+    _i2c.write((int)HDC1000_addr, (char *)dt, 1, true);
+    _i2c.read(HDC1000_addr, (char *)dt, 2, false);
+    device_id_number = dt[0] << 8 | dt[1];
+}