kopia lustrzana https://github.com/pimoroni/pimoroni-pico
121 wiersze
4.5 KiB
C++
121 wiersze
4.5 KiB
C++
#include "bme68x.hpp"
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#include "pico/stdlib.h"
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namespace pimoroni {
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bool BME68X::init() {
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int8_t result = 0;
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if(interrupt != PIN_UNUSED) {
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gpio_set_function(interrupt, GPIO_FUNC_SIO);
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gpio_set_dir(interrupt, GPIO_IN);
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gpio_pull_up(interrupt);
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}
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i2c_interface.i2c = i2c;
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i2c_interface.address = address;
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device.intf_ptr = &i2c_interface;
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device.intf = bme68x_intf::BME68X_I2C_INTF;
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device.read = (bme68x_read_fptr_t)&read_bytes;
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device.write = (bme68x_write_fptr_t)&write_bytes;
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device.delay_us = (bme68x_delay_us_fptr_t)&delay_us;
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device.amb_temp = 20;
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result = bme68x_init(&device);
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bme68x_check_rslt("bme68x_init", result);
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if(result != BME68X_OK) return false;
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result = bme68x_get_conf(&conf, &device);
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bme68x_check_rslt("bme68x_get_conf", result);
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if(result != BME68X_OK) return false;
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configure(BME68X_FILTER_OFF, BME68X_ODR_NONE, BME68X_OS_16X, BME68X_OS_1X, BME68X_OS_2X);
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return true;
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}
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bool BME68X::configure(uint8_t filter, uint8_t odr, uint8_t os_humidity, uint8_t os_pressure, uint8_t os_temp) {
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int8_t result = 0;
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conf.filter = filter;
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conf.odr = odr;
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conf.os_hum = os_humidity;
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conf.os_pres = os_pressure;
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conf.os_temp = os_temp;
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bme68x_set_conf(&conf, &device);
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bme68x_check_rslt("bme68x_set_conf", result);
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if(result != BME68X_OK) return false;
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return true;
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}
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bool BME68X::read_forced(bme68x_data *data, uint16_t heater_temp, uint16_t heater_duration) {
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int8_t result = 0;
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uint8_t n_fields;
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uint32_t delay_period;
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heatr_conf.enable = BME68X_ENABLE;
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heatr_conf.heatr_temp = heater_temp;
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heatr_conf.heatr_dur = heater_duration;
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result = bme68x_set_heatr_conf(BME68X_FORCED_MODE, &heatr_conf, &device);
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bme68x_check_rslt("bme68x_set_heatr_conf", result);
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if(result != BME68X_OK) return false;
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result = bme68x_set_op_mode(BME68X_FORCED_MODE, &device);
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bme68x_check_rslt("bme68x_set_op_mode", result);
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if(result != BME68X_OK) return false;
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delay_period = bme68x_get_meas_dur(BME68X_FORCED_MODE, &conf, &device) + (heatr_conf.heatr_dur * 1000);
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// Could probably just call sleep_us here directly, I guess the API uses this internally
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device.delay_us(delay_period, device.intf_ptr);
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result = bme68x_get_data(BME68X_FORCED_MODE, data, &n_fields, &device);
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bme68x_check_rslt("bme68x_get_data", result);
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if(result != BME68X_OK) return false;
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return true;
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}
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/*
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Will read profile_length results with the given temperatures and duration multipliers into the results array.
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Blocks until it has a valid result for each temp/duration, and returns the entire set in the given order.
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*/
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bool BME68X::read_parallel(bme68x_data *results, uint16_t *profile_temps, uint16_t *profile_durations, size_t profile_length) {
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int8_t result;
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bme68x_data data[3]; // Parallel & Sequential mode read 3 simultaneous fields
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uint8_t n_fields;
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uint32_t delay_period;
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heatr_conf.enable = BME68X_ENABLE;
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heatr_conf.heatr_temp_prof = profile_temps;
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heatr_conf.heatr_dur_prof = profile_durations;
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heatr_conf.profile_len = profile_length;
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heatr_conf.shared_heatr_dur = 140 - (bme68x_get_meas_dur(BME68X_PARALLEL_MODE, &conf, &device) / 1000);
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result = bme68x_set_heatr_conf(BME68X_PARALLEL_MODE, &heatr_conf, &device);
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bme68x_check_rslt("bme68x_set_heatr_conf", result);
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if(result != BME68X_OK) return false;
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result = bme68x_set_op_mode(BME68X_PARALLEL_MODE, &device);
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bme68x_check_rslt("bme68x_set_op_mode", result);
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if(result != BME68X_OK) return false;
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while (1) {
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delay_period = bme68x_get_meas_dur(BME68X_PARALLEL_MODE, &conf, &device) + (heatr_conf.shared_heatr_dur * 1000);
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device.delay_us(delay_period, device.intf_ptr);
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result = bme68x_get_data(BME68X_PARALLEL_MODE, data, &n_fields, &device);
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if(result == BME68X_W_NO_NEW_DATA) continue;
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bme68x_check_rslt("bme68x_get_data", result);
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if(result != BME68X_OK) return false;
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for(auto i = 0u; i < n_fields; i++) {
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results[data[i].gas_index] = data[i];
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if(data[i].gas_index == profile_length - 1) return true;
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}
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}
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return true;
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}
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} |