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MCP9808.h
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MCP9808.h
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//=========================================================================
// MCP9808.h
//
// An interface for the MCP9808 precision temperature sensor from Microchip.
//
// Author: David Witten, KD0EAG
// Date: May 2, 2020
// License: GPL 3.0
//=========================================================================
#ifndef MCP9808_H
#define MCP9808_H
//-----------------------------------
// MCP9808 Bus Address.
//-----------------------------------
#define MCP9808_LCL_I2CADDR_DEFAULT 0x18 // alt: (selected by chip hardware 0x18 - 0x1F
#define MCP9808_RMT_I2CADDR_DEFAULT 0x19 // alt: (selected by chip hardware 0x18 - 0x1F
// MCP9808 Registers
//-----------------------------------
#define MCP9808_REG_CONFIG 0x01
#define MCP9808_REG_UPPER_TEMP 0x02
#define MCP9808_REG_LOWER_TEMP 0x03
#define MCP9808_REG_CRIT_TEMP 0x04
#define MCP9808_REG_AMBIENT_TEMP 0x05
#define MCP9808_REG_MANUF_ID 0x06
#define MCP9808_REG_DEVICE_ID 0x07
#define MCP9808_REG_RESOLUTION 0x08
// Configuration register values.
//-----------------------------------
#define MCP9808_REG_CONFIG_SHUTDOWN 0x0100
#define MCP9808_REG_CONFIG_CRITLOCKED 0x0080
#define MCP9808_REG_CONFIG_WINLOCKED 0x0040
#define MCP9808_REG_CONFIG_INTCLR 0x0020
#define MCP9808_REG_CONFIG_ALERTSTAT 0x0010
#define MCP9808_REG_CONFIG_ALERTCTRL 0x0008
#define MCP9808_REG_CONFIG_ALERTSEL 0x0004
#define MCP9808_REG_CONFIG_ALERTPOL 0x0002
#define MCP9808_REG_CONFIG_ALERTMODE 0x0001
// Expected return values.
//-----------------------------------
#define MCP9808_MANID_EXPECTED 0x0054
#define MCP9808_DEVREV_EXPECTED 0x0400
#endif //MCP9808_H