121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
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#define _DEFAULT_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include "bme680.h"
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#include "i2c.h"
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#include "spi.h"
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#define AMBIENT_TEMP_GUESS 19.0
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#define HEATER_TARGET 300.0
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int main(void) {
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bme680_t bme680;
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uint8_t mode;
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double temperature = AMBIENT_TEMP_GUESS;
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time_t curr_time;
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char date[100];
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#if defined(USE_SPI) && defined(USE_I2C)
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#error "Both USE_SPI and USE_I2C are defined. Please define only one."
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#elif !defined(USE_SPI) && !defined(USE_I2C)
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#error "Neither USE_SPI nor USE_I2C is defined. Please define one."
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#elif defined(USE_SPI)
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bme680.dev.init = spi_init;
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bme680.dev.read = spi_read;
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bme680.dev.write = spi_write;
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bme680.dev.deinit = spi_deinit;
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#elif defined(USE_I2C)
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bme680.dev.init = i2c_init;
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bme680.dev.read = i2c_read;
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bme680.dev.write = i2c_write;
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bme680.dev.deinit = i2c_deinit;
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#endif
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bme680.dev.sleep = usleep;
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mode = BME680_MODE_FLOAT | BME680_ENABLE_GAS;
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#if defined(USE_SPI)
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mode |= BME680_SPI;
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#elif defined(USE_I2C)
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mode |= BME680_I2C;
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#endif
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if (bme680_init(&bme680, mode) != 0) {
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fprintf(stderr, "bme680_init()\n");
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exit(EXIT_FAILURE);
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}
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START:
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if (bme680_reset(&bme680) != 0) {
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fprintf(stderr, "bme680_reset()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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if (bme680_calibrate(&bme680) != 0) {
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fprintf(stderr, "bme680_calibrate()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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bme680.cfg.osrs_t = BME680_OVERSAMPLE_X16;
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bme680.cfg.osrs_p = BME680_OVERSAMPLE_X16;
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bme680.cfg.osrs_h = BME680_OVERSAMPLE_X8;
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bme680.cfg.filter = BME680_IIR_COEFF_127;
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bme680.cfg.res_heat[0] = bme680_calc_target(&bme680, HEATER_TARGET, temperature);
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bme680.cfg.idac_heat[0] = BME680_IDAC(100);
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bme680.cfg.gas_wait[0] = BME680_GAS_WAIT(25, BME680_GAS_WAIT_X4);
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bme680.setpoint = 0;
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if (bme680_configure(&bme680) != 0) {
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fprintf(stderr, "bme680_configure()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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if (bme680_start(&bme680) != 0) {
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fprintf(stderr, "bme680_start()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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if (bme680_poll(&bme680) != 0) {
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fprintf(stderr, "bme680_poll()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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if (bme680_read(&bme680) != 0) {
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fprintf(stderr, "bme680_read()\n");
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bme680_deinit(&bme680);
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exit(EXIT_FAILURE);
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}
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curr_time = time(NULL);
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strftime(date, 100, "%FT%T%z", localtime(&curr_time));
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printf("%s %g %g %g %g %d\n",
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date,
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bme680.fcomp.temp,
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bme680.fcomp.press,
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bme680.fcomp.hum,
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bme680.fcomp.gas_res,
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!!bme680.heat_stab);
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temperature = bme680.fcomp.temp;
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/* 60 secs */
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usleep(1000*1000*60);
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goto START;
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bme680_deinit(&bme680);
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return 0;
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}
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