diff options
Diffstat (limited to 'src/app')
| -rw-r--r-- | src/app/bme680-bsec/main.cc | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/app/bme680-bsec/main.cc b/src/app/bme680-bsec/main.cc index 2474fa3..c705068 100644 --- a/src/app/bme680-bsec/main.cc +++ b/src/app/bme680-bsec/main.cc @@ -3,6 +3,15 @@ * * SPDX-License-Identifier: BSD-2-Clause */ + +#include "config.h" +#ifdef CONFIG_driver_bme680_bsec_save_state +#define STRINGIFY(x) #x +#define TOSTRING(x) STRINGIFY(x) +#define BSEC_STATE_PATH TOSTRING(CONFIG_driver_bme680_bsec_state_path) +#include <stdio.h> +#endif + #include "arch.h" #include "driver/gpio.h" #include "driver/stdout.h" @@ -20,10 +29,18 @@ const char* accuracy[] = {"(unreliable)", "(calibration required)", "(auto-trim in progress)", ""}; +#ifdef CONFIG_driver_bme680_bsec_save_state +// For (de)serialization of library state across application restarts +uint8_t serialized_state[BSEC_MAX_STATE_BLOB_SIZE]; +uint8_t work_buffer[BSEC_MAX_STATE_BLOB_SIZE]; +#endif + void loop(void) { static bsec_bme_settings_t sensor_settings; + static uint16_t iteration = 0; + struct bme680_field_data data; bsec_input_t bsec_inputs[BSEC_MAX_PHYSICAL_SENSOR]; bsec_output_t bsec_outputs[BSEC_NUMBER_OUTPUTS]; @@ -177,6 +194,32 @@ void loop(void) kout << endl; } } + +#ifdef CONFIG_driver_bme680_bsec_save_state + if (++iteration == 600) { + uint32_t serialized_state_size; + status = bsec_get_state(0, serialized_state, BSEC_MAX_STATE_BLOB_SIZE, work_buffer, BSEC_MAX_STATE_BLOB_SIZE, &serialized_state_size); + if (status < 0) { + kout << "bsec_get_state error: " << status << endl; + return; + } + if (status > 0) { + kout << "bsec_get_state warning: " << status << endl; + } + FILE *f = fopen(BSEC_STATE_PATH, "w"); + if (f == NULL) { + perror("fopen"); + return; + } + if (fwrite(serialized_state, sizeof(uint8_t), serialized_state_size, f) < serialized_state_size) { + perror("fwrite"); + } + if (fclose(f) == EOF) { + perror("fclose"); + } + iteration = 0; + } +#endif } int main(void) @@ -215,6 +258,28 @@ int main(void) } kout << "BSEC init OK" << endl; +#ifdef CONFIG_driver_bme680_bsec_save_state + FILE *f = fopen(BSEC_STATE_PATH, "r"); + if (f != NULL) { + size_t serialized_state_size = fread(serialized_state, BSEC_MAX_STATE_BLOB_SIZE, sizeof(uint8_t), f); + if (serialized_state_size > 0) { + bsec_status = bsec_set_state(serialized_state, BSEC_MAX_STATE_BLOB_SIZE, work_buffer, BSEC_MAX_STATE_BLOB_SIZE); + if (bsec_status < 0) { + kout << "bsec_set_state error: " << bsec_status << endl; + } + if (bsec_status > 0) { + kout << "bsec_set_state warning: " << bsec_status << endl; + } + } + if (fclose(f) == EOF) { + perror("fclose"); + } + } else { + // file doesn't exist. that's harmless. + perror("fopen"); + } +#endif + /* * Output configuration. The BME680 BSEC library supports several virtual * sensors such as raw temperature, compensated temperature, or IAQ. Each |