vti_ps.h

// *************************************************************************************************
//
//      Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
//
//
//        Redistribution and use in source and binary forms, with or without
//        modification, are permitted provided that the following conditions
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//          notice, this list of conditions and the following disclaimer.
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//          Redistributions in binary form must reproduce the above copyright
//          notice, this list of conditions and the following disclaimer in the
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//          distribution.
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//          its contributors may be used to endorse or promote products derived
//          from this software without specific prior written permission.
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//        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//        "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//        LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
//        A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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//
// *************************************************************************************************

#ifndef VTI_PS_H_
#define VTI_PS_H_

// *************************************************************************************************
// Include section


// *************************************************************************************************
// Prototypes section
extern void ps_init(void);
extern void ps_start(void);
extern void ps_stop(void);
extern uint32_t ps_get_pa(void);
extern uint16_t ps_get_temp(void);

extern void init_pressure_table(void);
extern void update_pressure_table(int16_t href, uint32_t p_meas, uint16_t t_meas);
#ifndef CONFIG_FIXEDPOINT_MATH
extern int16_t conv_pa_to_meter(uint32_t p_meas, uint16_t t_meas);
#else
extern int16_t conv_pa_to_altitude(uint32_t p_meas, uint16_t t_meas);
#endif

// *************************************************************************************************
// Defines section

// Port and pin resource for TWI interface to pressure sensor
// SCL=PJ.3, SDA=PJ.2, DRDY=P2.6
#define PS_TWI_IN            (PJIN)
#define PS_TWI_OUT           (PJOUT)
#define PS_TWI_DIR           (PJDIR)
#define PS_TWI_REN           (PJREN)
#define PS_SCL_PIN           (BIT3)
#define PS_SDA_PIN           (BIT2)

// Port, pin and interrupt resource for interrupt from acceleration sensor, DRDY=P2.6
#define PS_INT_IN            (P2IN)
#define PS_INT_OUT           (P2OUT)
#define PS_INT_DIR           (P2DIR)
#define PS_INT_IE            (P2IE)
#define PS_INT_IES           (P2IES)
#define PS_INT_IFG           (P2IFG)
#define PS_INT_PIN           (BIT6)

// TWI defines
#define PS_TWI_WRITE            (0u)
#define PS_TWI_READ                     (1u)

#define PS_TWI_SEND_START       (0u)
#define PS_TWI_SEND_RESTART     (1u)
#define PS_TWI_SEND_STOP        (2u)
#define PS_TWI_CHECK_ACK        (3u)

#define PS_TWI_8BIT_ACCESS      (0u)
#define PS_TWI_16BIT_ACCESS     (1u)

#define PS_TWI_SCL_HI           { PS_TWI_OUT |=  PS_SCL_PIN; }
#define PS_TWI_SCL_LO           { PS_TWI_OUT &= ~PS_SCL_PIN; }
#define PS_TWI_SDA_HI           { PS_TWI_OUT |=  PS_SDA_PIN; }
#define PS_TWI_SDA_LO           { PS_TWI_OUT &= ~PS_SDA_PIN; }
#define PS_TWI_SDA_IN           { PS_TWI_OUT |=  PS_SDA_PIN; PS_TWI_DIR &= ~PS_SDA_PIN; }
#define PS_TWI_SDA_OUT          { PS_TWI_DIR |=  PS_SDA_PIN; }


// *************************************************************************************************
// Global Variable section


// *************************************************************************************************
// Extern section


#endif /*VTI_PS_H_*/