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/*
* spreadspace avr utils - usb-bmp180 example
*
*
* Copyright (C) 2016 Bernhard Tittelbach <bernhard@tittelbach.org>
* basically this is refactored and enhanced code from:
* https://github.com/sparkfun/BMP180_Breakout_Arduino_Library
* Please buy the sparkfun people Beer when you see them!!!!
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* spreadspace avr utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdio.h>
#include <LUFA/Drivers/Peripheral/SPI.h>
#include "util.h"
#include "usbio.h"
#include "bmp280.h"
#define ALTITUDE_GRAZ 353.0 // Altitude of Graz in Austria
#define PIN_CS_S0 PD1
#define REG_CS_S0 PIND
#define PIN_CS_S1 PD0
#define REG_CS_S1 PIND
#define OP_SETBIT |=
#define OP_CLEARBIT &= ~
#define OP_CHECK &
#define PIN_SW(PORTDDRREG, PIN, OP) PORTDDRREG OP (1 << PIN)
#define PINMODE_OUTPUT(REG, PIN) *(®+1) |= (1 << PIN) //just use DDR instead of PORT
#define PINMODE_INPUT(REG, PIN) *(®+1) &= ~(1 << PIN) //just use DDR instead of PORT
#define PINREG(x) x
#define DDRREG(x) *(&x+1)
#define PORTREG(x) *(&x+2)
#define HIGHv OP_SETBIT
#define LOWv OP_CLEARBIT
#define CS_SENSOR_0(LOWHIGH) (PIN_SW(PORTREG(REG_CS_S0),PIN_CS_S0,LOWHIGH))
#define CS_SENSOR_1(LOWHIGH) (PIN_SW(PORTREG(REG_CS_S1),PIN_CS_S1,LOWHIGH))
#define CS_SENSOR(x,LOWHIGH) CS_SENSOR_##x(LOWHIGH)
/*
=== Our Coefficients ===
T1: 28483, T2: 26628, T3: 50
P1: 37848, P2: -10585, P3: 3024, P4: 9882, P5: -217, P6: -7, P7: 15500, P8: -14600, P9: 6000
=== Adafruit Arduino Reference Coefficients ===
T1: 28483, T2: 26628, T3: 50
P1: 37848, P2: -10585, P3: 3024, P4: 9882, P5: -217, P6: -7, P7: 15500, P8: -14600, P9: 6000
*/
void printCoeffs(bmp280_sensor *sensor)
{
printf("T1: %u, T2: %d, T3: %d\r\n", sensor->dig_T1, sensor->dig_T2, sensor->dig_T3);
printf("P1: %u, P2: %d, P3: %d, P4: %d, P5: %d, P6: %d, P7: %d, P8: %d, P9: %d\r\n",sensor->dig_P1,sensor->dig_P2,sensor->dig_P3,sensor->dig_P4,sensor->dig_P5,sensor->dig_P6,sensor->dig_P7,sensor->dig_P8,sensor->dig_P9);
//printf("H1: %d, H2: %d, H3: %d, H4: %d, H5: %d, H6: %d\r\n",sensor->dig_H1,sensor->dig_H2,sensor->dig_H3,sensor->dig_H4,sensor->dig_H5,sensor->dig_H6);
}
int main(void)
{
MCUSR &= ~(1 << WDRF);
wdt_disable();
cpu_init();
usbio_init();
sei();
bmp280_sensor sensor0;
bmp280_sensor sensor1;
uint8_t sensor0_available = 0;
uint8_t sensor1_available = 0;
//CS Output
PINMODE_OUTPUT(REG_CS_S0,PIN_CS_S0);
PINMODE_OUTPUT(REG_CS_S1,PIN_CS_S1);
//CS High
CS_SENSOR(0,HIGHv);
CS_SENSOR(1,HIGHv);
//LUFA SPI
SPI_Init(BMP280_LUFA_SPIO_OPTIONS);
printf("USB-SPI-BMP280 starting");
bmp280_result tmppres;
float altitude;
for(;;) {
printf("\r\n== Sensor 0 ==\r\n");
if (sensor0_available)
{
printCoeffs(&sensor0);
tmppres = bmp280_readTempAndPressure(&sensor0);
altitude = bmp280_calcAltitude(tmppres.pressure, BMP280_AVERAGE_SEA_LEVEL_PRESSURE);
printf("\r\nPressure: %.2f Pa @ %.2f degC\r\n", tmppres.pressure, tmppres.temperature);
printf("Altitude: %.2fm (guessing)\r\n", altitude);
sensor0_available = bmp280_check_chipid(&sensor0);
} else {
printf(" not available\r\n");
sensor0_available = bmp280_init(&sensor0, &PORTREG(REG_CS_S0), PIN_CS_S0);
}
printf("\r\n== Sensor 1 ==\r\n");
if (sensor1_available)
{
printCoeffs(&sensor1);
tmppres = bmp280_readTempAndPressure(&sensor1);
altitude = bmp280_calcAltitude(tmppres.pressure, BMP280_AVERAGE_SEA_LEVEL_PRESSURE);
printf("\r\nPressure: %.2f Pa @ %.2f degC\r\n", tmppres.pressure, tmppres.temperature);
printf("Altitude: %.2fm (approximate)\r\n", altitude);
sensor1_available = bmp280_check_chipid(&sensor1);
} else {
printf(" not available\r\n");
sensor1_available = bmp280_init(&sensor1, &PORTREG(REG_CS_S1), PIN_CS_S1);
}
usbio_task();
_delay_ms(3000); // Pause for 3 seconds.
}
}
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