Diff: hts221.h

Revision:

0:8d05f1ced202

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hts221.h	Fri Jun 17 01:55:11 2016 +0000
@@ -0,0 +1,99 @@
+/* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+#ifndef HTS221_H
+#define HTS221_H
+
+/*lint ++flb "Enter library region" */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#define ADDRESS_WHO_AM_I (0x0FU) //!< WHO_AM_I register identifies the device. Expected value is 0xBC.
+
+#define HTS221_WriteADDE         0xBE
+#define HTS221_ReadADDE          0xBF
+#define HTS221_TempHumi_OUT      0x28
+#define HTS221_CALIB             0x30
+
+#define MaxTemp       120
+#define MinTemp       -40
+#define MaxHumi       100
+#define MinHumi       0
+
+// Humidity and temperature resolution mode, to ocnfigure sample average
+#define TRes_1        000 // Number of temperature samples take 2^1, TRes_2 take 2^2, and so forth.
+#define TRes_2        001 
+#define TRes_3        010
+#define TRes_4        011
+#define TRes_5        100
+#define TRes_6        101
+#define TRes_7        102
+#define TRes_8        103
+
+#define HRes_2        000 // Number of humidity samples take 2^2, HRes_3 take 2^3, and so forth.
+#define HRes_3        001 
+#define HRes_4        010
+#define HRes_5        011
+#define HRes_6        100
+#define HRes_7        101
+#define HRes_8        102
+#define HRes_9        103
+
+// Control register 1
+#define PD_On                    0x80 // Power down mode
+#define PD_Off                   0x00 // Active mode
+
+#define BDU_On                   0x04 // Block data update, this feature prevents the reading of LSB and MSB related to different samples.
+#define BDU_Off                  0x00 
+// Define output data rate
+#define ODR_OneShot              0x00
+#define ODR_1Hz                  0x01
+#define ODR_7Hz                  0x02
+#define ODR_12_5Hz               0x03
+// Control register 2
+#define Boot                     0x80
+#define NoBoot                   0x00
+#define HeaterOn                 0x02
+#define HeaterOff                0x00
+#define New_OS                   0x01 // One shot, a single acquisition of temperature and humidity is started
+#define No_OS                    0x00
+// Control register 3
+#define DRDY_H                   0x00 // Data Ready output signal active high(default)
+#define DRDY_L                   0x80 // Data Ready output signal active low
+#define PP_OD_PP                 0x00 // Push-pull on PIN3(DRDY)(default)
+#define PP_OD_OD                 0x40 // Open Drain on PIN3(DRDY)
+#define DRDY_EN                  0x04 // Data Ready enable
+#define DRDY_NON                 0x00 // Data Ready disable(default)
+
+// Status register
+#define H_DA_On                  0x02 // Humidity data avialable, set to 1 whenever a new humidity sample is available.
+#define H_DA_Off                 0x00
+#define T_DA_On                  0x01 // Temperature data avialable, set to 1 whenever a new humidity sample is available.
+#define T_DA_Off                 0x00
+ 
+bool hts221_init(void);
+
+void hts221_register_write(uint8_t register_address, const uint8_t value);
+
+void hts221_register_read(char register_address, char *destination, uint8_t number_of_bytes);
+
+bool hts221_verify_product_id(void);
+
+void HTS221_Calib(void);
+
+void HTS221_ReadTempHumi( float *pTemp , float *pHumi);
+
+float linear_interpolation(int16_t x0, float y0, int16_t x1, float y1, float mes);
+
+#endif /* HTS221_H */
+