79b546632b
- 增加了 `ui.h` 中资源数组的大小以容纳新的 UI 元素。 - 更新了 `ui_font_chinese_16.c`，添加了更多中文字符以更好地支持本地化。 - 在 `vars.h` 中添加了用于管理火焰状态的新函数，增强了系统的监测能力。
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
#include "MQ-2.h"
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#include "esp_adc/adc_oneshot.h"
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#include "esp_check.h"
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#define MQ2_ADC_UNIT ADC_UNIT_1
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#define MQ2_ADC_CHANNEL ADC_CHANNEL_7
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#define MQ2_SAMPLE_COUNT 8
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static const char *TAG = "MQ2";
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static adc_oneshot_unit_handle_t s_adc_handle = NULL;
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static bool s_inited = false;
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esp_err_t mq2_init(void)
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{
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if (s_inited) {
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return ESP_OK;
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}
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adc_oneshot_unit_init_cfg_t init_cfg = {
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.unit_id = MQ2_ADC_UNIT,
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.ulp_mode = ADC_ULP_MODE_DISABLE,
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};
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ESP_RETURN_ON_ERROR(adc_oneshot_new_unit(&init_cfg, &s_adc_handle), TAG, "adc new unit failed");
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adc_oneshot_chan_cfg_t chan_cfg = {
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.atten = ADC_ATTEN_DB_12,
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.bitwidth = ADC_BITWIDTH_DEFAULT,
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};
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ESP_RETURN_ON_ERROR(adc_oneshot_config_channel(s_adc_handle, MQ2_ADC_CHANNEL, &chan_cfg),
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TAG, "adc channel config failed");
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s_inited = true;
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return ESP_OK;
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}
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esp_err_t mq2_read_raw(int *raw_out)
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{
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ESP_RETURN_ON_FALSE(raw_out != NULL, ESP_ERR_INVALID_ARG, TAG, "raw_out is null");
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ESP_RETURN_ON_FALSE(s_inited, ESP_ERR_INVALID_STATE, TAG, "mq2 not inited");
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int sum = 0;
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for (int i = 0; i < MQ2_SAMPLE_COUNT; ++i) {
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int sample = 0;
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ESP_RETURN_ON_ERROR(adc_oneshot_read(s_adc_handle, MQ2_ADC_CHANNEL, &sample),
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TAG, "adc read failed");
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sum += sample;
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}
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*raw_out = sum / MQ2_SAMPLE_COUNT;
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return ESP_OK;
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}
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esp_err_t mq2_read_percent(float *percent_out)
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{
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ESP_RETURN_ON_FALSE(percent_out != NULL, ESP_ERR_INVALID_ARG, TAG, "percent_out is null");
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int raw = 0;
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ESP_RETURN_ON_ERROR(mq2_read_raw(&raw), TAG, "read raw failed");
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*percent_out = (raw * 100.0f) / 4095.0f;
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return ESP_OK;
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}
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bool mq2_is_alarm(float percent, float threshold_percent)
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{
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return percent >= threshold_percent;
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}
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adc_oneshot_unit_handle_t mq2_get_adc_handle(void)
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{
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return s_adc_handle;
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}
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