85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
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/*
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* Copyright (c) 2022 Jinan Bosai Network Technology Co., LTD Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <math.h>
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#include "ohos_init.h"
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#include "cmsis_os2.h"
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#include "CH2O.h"
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#define TASK_STACK_SIZE 1024*8
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#define TASK_PRIO 25
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static void ExampleTask(void)
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{
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int ret;
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float ppm;
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BoardInit();
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//Sensor calibration
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usleep(1000000);
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MQ2PPMCalibration();
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while (1) {
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printf("=======================================\r\n");
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printf("*************A22_MQ2_example***********\r\n");
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printf("=======================================\r\n");
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//get mq2 ppm
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ret = GetMQ2PPM(&ppm);
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if (ret != 0) {
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printf("ADC Read Fail\n");
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return ;
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}
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printf("ppm:%.3f \n", ppm);
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if (ppm > 20) {
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BeepStatusSet(ON);
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LedSafeStatusSet(OFF);
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LedWarnStatusSet(ON);
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} else {
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BeepStatusSet(OFF);
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LedSafeStatusSet(ON);
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LedWarnStatusSet(OFF);
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}
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usleep(1000000);
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}
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}
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/**
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* @brief Main Entry of the A22_MQ2 Example
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*
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*/
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static void ExampleEntry(void)
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{
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osThreadAttr_t attr;
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attr.name = "ExampleTask";
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attr.attr_bits = 0U;
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attr.cb_mem = NULL;
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attr.cb_size = 0U;
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attr.stack_mem = NULL;
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attr.stack_size = TASK_STACK_SIZE;
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attr.priority = TASK_PRIO;
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if (osThreadNew((osThreadFunc_t)ExampleTask, NULL, &attr) == NULL) {
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printf("Failed to create ExampleTask!\n");
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}
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}
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APP_FEATURE_INIT(ExampleEntry);
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