/*
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* Copyright (c) 2015-2016 Infineon Technologies AG
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*
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* Driver for Infineon DPS310 Digital Barometric Pressure Sensor
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*
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "dps310.h"
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#include "mainex.h"
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#include "lis3dh_driver.h"
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/*bus communication protocol stubs
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* Please wrap around platform specific implementation
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* for low level bus handling (I2C or SPI), that matches
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* prototypes provided by dps310_bus_connection structure
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* in dps310.h
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*/
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void delay_us(uint32_t nTimer);
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/* Should return -1 in case of failure otherwise valid contents*/
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s16 test_read_byte(u8 ReadAddr)
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{
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uint8_t temp=0;
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IIC2_Start();
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IIC2_Send_Byte(0xee); //·¢ËÍдÃüÁî
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IIC2_Wait_Ack();
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IIC2_Send_Byte(ReadAddr); //·¢ËͶÁµØÖ·
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IIC2_Wait_Ack();
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IIC2_Start();
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IIC2_Send_Byte(0xef); //·¢ËͶÁÃüÁ½øÈë½ÓÊÕģʽ
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IIC2_Wait_Ack();
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temp=IIC2_Read_Byte(0);
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IIC2_Stop(); //²úÉúÒ»¸öÍ£Ö¹Ìõ¼þ
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return temp;
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}
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/* Should return -1 or negative value in case of failure otherwise length of
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* read contents in read_buffer
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* and shall place read contents in read_buffer
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*/
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s16 test_read_block(u8 ReadAddr, u8 Len, u8 *read_buffer)
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{
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uint8_t t;
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uint32_t temp=0;
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for(t=0;t<Len;t++)
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{
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*read_buffer=test_read_byte(ReadAddr+t);
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read_buffer++;
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}
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//return temp;
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return Len;
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}
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/* Should return -1 in case of failure otherwise non negative number*/
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s16 test_write_byte(u8 WriteAddr, u8 DataToWrite)
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{
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IIC2_Start();
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IIC2_Send_Byte(0xee); //·¢ËÍдÃüÁî
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IIC2_Wait_Ack();
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IIC2_Send_Byte(WriteAddr); //·¢Ë͵ØÖ·
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IIC2_Wait_Ack();
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IIC2_Send_Byte(DataToWrite); //·¢ËÍ×Ö½Ú
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IIC2_Wait_Ack();
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IIC2_Stop();//²úÉúÒ»¸öÍ£Ö¹Ìõ¼þ
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delay_us(10);
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}
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/* Shall implement delay in milliseconds*/
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void test_wait_ms(u8 delay)
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{
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printf("Waiting for %dms\n",delay);
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}
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struct dps310_state drv_state;
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f64 pressure,temperature;
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int BarInit(void)
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{
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/*Instantiate driver state*/
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/*Instantiate bus connection callback holder*/
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dps310_bus_connection cnn;
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/* Assign/register platform specific bus handlers*/
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cnn.read_byte=&test_read_byte;
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cnn.read_block=&test_read_block;
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cnn.write_byte=&test_write_byte;
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/*If platform doesn't support delay or sleep
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*please assign NULL to this callback i.e cnn.delayms = NULL
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*/
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cnn.delayms = &test_wait_ms;
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/*First call _init
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* this function verifies chip with appropriate id and
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* reads and stores calibration data, configures the sensor
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* to meet default configuration set in dps310.h.
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* This also puts the sensor in background mode
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* making it measure both pressure and temperature continuously
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*/
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int ret = dps310_init(&drv_state,&cnn);
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// printf("init ret val = %d\n",ret);
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/* once sensor is put into background mode
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* pressure and temperature values are available and can be read
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* Here get_processed_data synchrounuously reads 6 bytes of raw data
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* and returns computed double precision pressure and temperature value
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*/
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ret = dps310_get_processed_data(&drv_state,&pressure,&temperature);
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// printf("get_processed_data ret val = %d, pressure = %lf, temp = %lf\n",ret,pressure,temperature);
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/*To change configuration we first need to put sensor in
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*idle mode by calling _standby
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*/
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// ret = dps310_standby(&drv_state);
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// printf("standby ret val = %d\n",ret);
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// /* Now lets call _config to meet different output data rate (ODR)
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// * and oversampling rate (OSR) based on scenario and usecase
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// * For valid combinations please refer to Page 25 of datasheet
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// */
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// ret = dps310_config(&drv_state,
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// OSR_2,
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// TMP_MR_2,
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// OSR_8,
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// PM_MR_64,
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// drv_state.tmp_ext);
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// printf("config ret val = %d\n",ret);
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//
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// /*Resume the sensor in background mode again*/
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// ret = dps310_resume(&drv_state);
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// printf("resume ret val = %d\n",ret);
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return 0;
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}
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float PressToHeight(float press,float temper)
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{
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float temp1,temp2;
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temp1 = 8.51*temper/284;
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temp2 = log10f(101325/press);
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return temp1*temp2;
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}
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float height;
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void GetPressAndTemp(void)
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{ u8 ret;
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/*Instantiate driver state*/
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ret = dps310_get_processed_data(&drv_state,&pressure,&temperature);
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//height=PressToHeight(pressure,temperature);
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printf("get_processed_data ret val = %d, pressure = %lf, temp = %lf\n",ret,pressure,temperature);
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}
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