?? bsp_stlm75.c
字號:
/*
*********************************************************************************************************
* MICRIUM BOARD SUPPORT SUPPORT
*
* (c) Copyright 2003-2009; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
* Knowledge of the source code may NOT be used to develop a similar product.
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* MICIUM BOARD SUPPORT PACKAGE
* STLM75 CMOS TEMPERATURE SENSOR DRIVER
*
*
* Filename : bsp_stlm75.c
* Version : V1.00
* Programmer(s) : FT
*********************************************************************************************************
* Note(s) :
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define BSP_STLM75_MODULE
#include <bsp.h>
/*
*********************************************************************************************************
* LOCAL DEFINES
*********************************************************************************************************
*/
#define BSP_STLM75_REG_TEMP DEF_BIT_NONE
#define BSP_STLM75_REG_CONF DEF_BIT_00
#define BSP_STLM75_REG_T_HYST DEF_BIT_01
#define BSP_STLM75_REG_T_OS (DEF_BIT_01 | DEF_BIT_00)
#define BSP_STLM75_REG_CONF_SD DEF_BIT_00
#define BSP_STLM75_REG_CONF_THERMOSTAT_MODE DEF_BIT_01
#define BSP_STLM75_REG_CONF_POL DEF_BIT_02
#define BSP_STLM75_REG_CONF_FT0 DEF_BIT_03
#define BSP_STLM75_REG_CONF_FT1 DEF_BIT_04
#define BSP_STLM75_I2C_ADDR ((CPU_INT08U)0x48)
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL MACRO'S
*********************************************************************************************************
*/
#define BSP_STLM75_TEMP_TO_REG(temp) ((CPU_INT16U)((((CPU_INT16U)(temp) << 8) & DEF_BIT_FIELD(9, 7))))
#define BSP_STLM75_REG_TO_TEMP(reg) ((CPU_INT08S)((((CPU_INT16U)(reg) >> 8) & DEF_BIT_FIELD(9, 0))))
/*
*********************************************************************************************************
* LOCAL DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
static CPU_BOOLEAN BSP_STLM75_WrReg_08 (CPU_INT08U reg,
CPU_INT08U reg_val);
static CPU_BOOLEAN BSP_STLM75_WrReg_16 (CPU_INT08U reg,
CPU_INT16U reg_val);
static CPU_BOOLEAN BSP_STLM75_RdReg_16 (CPU_INT08U reg,
CPU_INT16U *p_reg_val);
/*
*********************************************************************************************************
* LOCAL CONFIGURATION ERRORS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*********************************************************************************************************
** GLOBAL FUNCTIONS
*********************************************************************************************************
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* BSP_STLM75_Init ()
*
* Description : Initialize the the STLM75 Tempeture sensor.
*
* Argument(s) : none.
*
* Return(s) : DEF_OK If the STLM75 Tempeture sensor was initialized
* DEF_FAIL If the STLM75 Tempeture sensor could not be initialized.
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
CPU_BOOLEAN BSP_STLM75_Init (void)
{
CPU_BOOLEAN err;
err = BSP_I2C_Init(BSP_I2C_ID_I2C1,
BSP_I2C_MODE_STANDARD,
BSP_I2C_MODE_STANDARD_MAX_FREQ_HZ);
return (err);
}
/*
*
*********************************************************************************************************
* BSP_STLM75_CfgSet()
*
* Description : Configures the STLM75 Tempeture sensor
*
* Argument(s) : p_stlm75_cfg Pointer to the STLM75 configuration.
*
* Return(s) : DEF_OK If the STLM75 Tempeture Sensor configuration could be returned
* DEF_FAIL If the STLM75 Tempeture sensor configuration could not be returned
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
CPU_BOOLEAN BSP_STLM75_CfgSet (BSP_STLM75_CFG *p_stlm75_cfg)
{
CPU_INT16U reg_val;
CPU_BOOLEAN err;
if (p_stlm75_cfg == (BSP_STLM75_CFG *)0) {
return (DEF_FAIL);
}
/* --------- SET THE CONFIGURATION REGISTER -------- */
reg_val = DEF_BIT_NONE;
if (p_stlm75_cfg->Mode == BSP_STLM75_MODE_INTERRUPT) {
reg_val = BSP_STLM75_REG_CONF_THERMOSTAT_MODE;
}
if (p_stlm75_cfg->IntPol == BSP_STLM75_INT_POL_HIGH) {
DEF_BIT_SET(reg_val, BSP_STLM75_REG_CONF_POL);
}
switch (p_stlm75_cfg->FaultLevel) {
case BSP_STLM75_FAULT_LEVEL_2:
DEF_BIT_SET(reg_val, BSP_STLM75_REG_CONF_FT0);
break;
case BSP_STLM75_FAULT_LEVEL_4:
DEF_BIT_SET(reg_val, BSP_STLM75_REG_CONF_FT1);
break;
case BSP_STLM75_FAULT_LEVEL_6:
DEF_BIT_SET(reg_val, BSP_STLM75_REG_CONF_FT1 | BSP_STLM75_REG_CONF_FT0);
break;
case BSP_STLM75_FAULT_LEVEL_1:
break;
default:
return (DEF_FAIL);
}
err = BSP_STLM75_WrReg_08((CPU_INT08U)BSP_STLM75_REG_CONF,
(CPU_INT08U)reg_val);
if (err == DEF_FAIL) {
return (DEF_FAIL);
}
reg_val = BSP_STLM75_TEMP_TO_REG(p_stlm75_cfg->HystTemp);
err = BSP_STLM75_WrReg_16((CPU_INT08U)BSP_STLM75_REG_T_HYST,
(CPU_INT16U)reg_val);
if (err == DEF_FAIL) {
return (DEF_FAIL);
}
reg_val = BSP_STLM75_TEMP_TO_REG(p_stlm75_cfg->OverLimitTemp);
err = BSP_STLM75_WrReg_16((CPU_INT08U)BSP_STLM75_REG_T_OS,
(CPU_INT16U)reg_val);
return (err);
}
/*
*********************************************************************************************************
* BSP_STLM75_WrReg_08()
*
* Description : Write 8-bit value to STLM75 register.
*
* Argument(s) : reg STLM75's register
* BSP_STLM75_REG_TEMP
* BSP_STLM75_REG_CONF
* BSP_STLM75_REG_T_HYST
* BSP_STLM75_REG_T_OS
*
* Return(s) : DEF_OK If the STLM75's register could be written.
* DEF_FAIL If the STLM75's register could not be written.
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
static CPU_BOOLEAN BSP_STLM75_WrReg_08 (CPU_INT08U reg,
CPU_INT08U reg_val)
{
CPU_INT08U i2c_buf[2];
CPU_BOOLEAN err;
i2c_buf[0] = reg;
i2c_buf[1] = reg_val;
err = BSP_I2C_Wr( BSP_I2C_ID_I2C1,
BSP_STLM75_I2C_ADDR,
&i2c_buf[0],
2);
return (err);
}
/*
*********************************************************************************************************
* BSP_STLM75_WrReg_16()
*
* Description : Write 16-bit value to STLM75 register.
*
* Argument(s) : reg STLM75's register
* BSP_STLM75_REG_TEMP
* BSP_STLM75_REG_CONF
* BSP_STLM75_REG_T_HYST
* BSP_STLM75_REG_T_OS
*
* Return(s) : DEF_OK If the STLM75's register could be written.
* DEF_FAIL If the STLM75's register could not be written.
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
static CPU_BOOLEAN BSP_STLM75_WrReg_16 (CPU_INT08U reg,
CPU_INT16U reg_val)
{
CPU_INT08U i2c_buf[3];
CPU_BOOLEAN err;
i2c_buf[0] = reg;
i2c_buf[1] = (reg_val >> 8) & DEF_BIT_FIELD(8, 0);
i2c_buf[2] = (reg_val >> 0) & DEF_BIT_FIELD(8, 0);;
err = BSP_I2C_Wr( BSP_I2C_ID_I2C1,
BSP_STLM75_I2C_ADDR,
&i2c_buf[0],
3);
return (err);
}
/*
*********************************************************************************************************
* BSP_STLM75_RdReg_16()
*
* Description : Read 16-bit register from STLM75 device
*
* Argument(s) : reg STLM75's register
* BSP_STLM75_REG_TEMP
* BSP_STLM75_REG_CONF
* BSP_STLM75_REG_T_HYST
* BSP_STLM75_REG_T_OS
*
* Return(s) : DEF_OK If the STLM75's register could be read.
* DEF_FAIL If the STLM75's register could not be read.
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
static CPU_BOOLEAN BSP_STLM75_RdReg_16 (CPU_INT08U reg,
CPU_INT16U *p_reg_val)
{
CPU_INT08U i2c_buf[3];
CPU_BOOLEAN err;
i2c_buf[0] = reg;
err = BSP_I2C_WrRd( BSP_I2C_ID_I2C1,
BSP_STLM75_I2C_ADDR,
&i2c_buf[0],
3);
if (err == DEF_FAIL) {
return (DEF_FAIL);
}
*p_reg_val = (i2c_buf[2] << 0)
| (i2c_buf[1] << 8);
return (DEF_OK);
}
/*
*********************************************************************************************************
* BSP_STLM75_TempGet()
*
* Description : Read the current temperature from the STLM75
*
* Argument(s) : temp_unit Temperature unit:
* BSP_STLM75_TEMP_UNIT_CELSIUS
* BSP_STLM75_TEMP_UNIT_FAHRENHEIT
* BSP_STLM75_TEMP_UNIT_KELVIN
*
* p_temp_val Pointer to the variable that will store the temperature.
*
* Return(s) : DEF_OK If the temperature could be read.
* DEF_FAIL If the temperature could not be read.
*
* Caller(s) : Application
*
* Note(s) : none.
*********************************************************************************************************
*/
CPU_BOOLEAN BSP_STLM75_TempGet (CPU_INT08U temp_unit,
CPU_INT16S *p_temp_val)
{
CPU_INT16S temp_c;
CPU_INT16U reg_val;
CPU_BOOLEAN err;
err = BSP_STLM75_RdReg_16(BSP_STLM75_REG_TEMP,
®_val);
if (err == DEF_FAIL) {
return (DEF_FAIL);
}
temp_c = BSP_STLM75_REG_TO_TEMP(reg_val);
switch (temp_unit) {
case BSP_STLM75_TEMP_UNIT_CELSIUS:
*p_temp_val = temp_c;
break;
case BSP_STLM75_TEMP_UNIT_FAHRENHEIT:
*p_temp_val = ((temp_c * 9) / 5) + 32;
break;
case BSP_STLM75_TEMP_UNIT_KELVIN:
*p_temp_val = ((temp_c + 273));
break;
default:
return (DEF_FAIL);
}
return (DEF_OK);
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