diff options
| author | Yuval Adam <yuval@y3xz.com> | 2015-03-13 12:24:52 +0200 |
|---|---|---|
| committer | Yuval Adam <yuval@y3xz.com> | 2015-03-13 12:24:52 +0200 |
| commit | 4085ae3ddfbbf10c8ccbd3dccd43452c40a1fe40 (patch) | |
| tree | ac63581949a49511136e7e9e47d265bfb4119b26 /sensorlib/hw_sht21.h | |
| parent | 788db64b8642bf31de6930d18a62177c64163ee0 (diff) | |
Add bootloader, nfclib and sensorlib
Diffstat (limited to 'sensorlib/hw_sht21.h')
| -rw-r--r-- | sensorlib/hw_sht21.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/sensorlib/hw_sht21.h b/sensorlib/hw_sht21.h new file mode 100644 index 0000000..550af75 --- /dev/null +++ b/sensorlib/hw_sht21.h @@ -0,0 +1,76 @@ +//*****************************************************************************
+//
+// hw_sht21.h - Macros used for accessing the Intersil SHT21 humidity sensor
+//
+// Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved.
+// Software License Agreement
+//
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+//
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+//
+// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.
+//
+//*****************************************************************************
+
+#ifndef __SENSORLIB_HW_SHT21_H__
+#define __SENSORLIB_HW_SHT21_H__
+
+//*****************************************************************************
+//
+// The following are defines for the SHT21 Commands and Registers
+//
+//*****************************************************************************
+#define SHT21_CMD_MEAS_T_HOLD 0xE3 // Measure temperatue with I2C bus
+ // hold
+#define SHT21_CMD_MEAS_RH_HOLD 0xE5 // Measure humidity with I2C bus
+ // hold
+#define SHT21_CMD_WRITE_CONFIG 0xE6 // Write the user config register
+#define SHT21_CMD_READ_CONFIG 0xE7 // Read the user config register
+#define SHT21_CMD_MEAS_T 0xF3 // Measure temperature polled
+#define SHT21_CMD_MEAS_RH 0xF5 // Measure humidity polled
+#define SHT21_CMD_SOFT_RESET 0xFE // Perform a device reset
+
+//*****************************************************************************
+//
+// The following are defines for the bit fields in the SHT21_CONFIG register.
+//
+//*****************************************************************************
+#define SHT21_CONFIG_RES_M 0x81 // Resolution config for
+ // temperature and humidity
+#define SHT21_CONFIG_RES_12 0x00 // RH 12 bit, T 14 bit
+#define SHT21_CONFIG_RES_8 0x01 // RH 8 bit, T 12 bit
+#define SHT21_CONFIG_RES_10 0x80 // RH 10 bit, T 13 bit
+#define SHT21_CONFIG_RES_11 0x81 // RH 11 bit, T 11 bit
+#define SHT21_CONFIG_BATT_M 0x40 // Battery status indicator
+#define SHT21_CONFIG_BATT_GOOD 0x00
+#define SHT21_CONFIG_BATT_LOW 0x40
+#define SHT21_CONFIG_HEATER_M 0x04 // On chip heater for test and
+ // diagnostics
+#define SHT21_CONFIG_HEATER_DISABLE \
+ 0x00 // Heater off
+#define SHT21_CONFIG_HEATER_ENABLE \
+ 0x04 // Heater on
+#define SHT21_CONFIG_OTP_RELOAD_M \
+ 0x02 // OTP reload control; soft reset
+ // is preferred
+#define SHT21_CONFIG_OTP_RELOAD_ENABLE \
+ 0x00 // OTP reload enabled
+#define SHT21_CONFIG_OTP_RELOAD_DISABLE \
+ 0x02 // OTP reload disabled
+#define SHT21_CONFIG_BATT_S 6
+#define SHT21_CONFIG_HEATER_S 2
+#define SHT21_CONFIG_OTP_RELOAD_S \
+ 1
+#define SHT21_CONFIG_RES_S 0
+
+#endif // __SENSORLIB_HW_SHT21_H__
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