70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
#include "bme680.h"
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#include <stdio.h>
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#include <string.h>
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struct bme680_dev gas_sensor;
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uint8_t coeff1[25] = {
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192, 108, 103, 3, 47, 80, 144, 236,
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214, 88, 255, 42, 30, 169, 255, 54,
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30, 0, 0, 199, 239, 69, 248, 30,
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1
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};
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uint8_t coeff2[16] = {
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64, 206, 39, 0, 45, 20, 120,
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156, 24, 102, 142, 171, 226, 18, 16,
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0
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};
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int8_t user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len){
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switch(reg_addr){
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case BME680_CHIP_ID_ADDR:
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data[0] = BME680_CHIP_ID;
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return BME680_OK;
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case BME680_COEFF_ADDR1:
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memcpy(data, coeff1, len);
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return BME680_OK;
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case BME680_COEFF_ADDR2:
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memcpy(data, coeff2, len);
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return BME680_OK;
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}
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return 0;
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}
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int8_t user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len){
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return 0;
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}
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void user_delay_ms(uint32_t period){
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return;
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}
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int main(){
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gas_sensor.dev_id = BME680_I2C_ADDR_PRIMARY;
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gas_sensor.intf = BME680_I2C_INTF;
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gas_sensor.read = user_i2c_read;
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gas_sensor.write = user_i2c_write;
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gas_sensor.delay_ms = user_delay_ms;
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int8_t rslt = BME680_OK;
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rslt = bme680_init(&gas_sensor);
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if(rslt == BME680_OK){
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printf("CHIP OK\n");
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printf("%d\n",gas_sensor.calib.par_t1);
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printf("%d\n",gas_sensor.calib.par_t2);
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}
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uint8_t buff[15] = {128,0, 79,186,144, 122,185,64, 76,59, 128,0,0, 220,120};
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uint32_t adc_pres = (uint32_t) (((uint32_t) buff[2] * 4096) | ((uint32_t) buff[3] * 16) | ((uint32_t) buff[4] / 16));
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uint32_t adc_temp = (uint32_t) (((uint32_t) buff[5] * 4096) | ((uint32_t) buff[6] * 16) | ((uint32_t) buff[7] / 16));
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uint16_t adc_hum = (uint16_t) (((uint32_t) buff[8] * 256) | (uint32_t) buff[9]);
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uint16_t adc_gas_res = (uint16_t) ((uint32_t) buff[13] * 4 | (((uint32_t) buff[14]) / 64));
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uint8_t gas_range = buff[14] & BME680_GAS_RANGE_MSK;
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printf("%d\n",calc_temperature(adc_temp, &gas_sensor));
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printf("%d\n",calc_pressure(adc_pres, &gas_sensor));
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}
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