85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
#include "MHZ14B.hpp"
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#include "common.hpp"
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#include "HC-12.hpp"
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void MH_Z14B_INIT()
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{
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// 初始化UART
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uart_init(UART1, BAUD_RATE);
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gpio_set_function(UART1_TX_PIN, GPIO_FUNC_UART);
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gpio_set_function(UART1_RX_PIN, GPIO_FUNC_UART);
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uart_set_hw_flow(UART1, false, false);
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uart_set_format(UART1, DATA_BITS, STOP_BITS, PARITY);
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return ;
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}
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// CO2
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static uint16_t MH_Z14B(int *MH_Z14B_DATA_IS_OK)
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{
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// 0x86 读气体浓度值
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uint8_t CMD[9] = { 0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 };
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uart_write_blocking(UART1, CMD, 9);
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sleep_ms(200);
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// 读取
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uint8_t CO2_DATA[9] = { 0 };
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uart_read_blocking(UART1, CO2_DATA, 9);
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// CO2 浓度
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uint16_t CO2_CONC = (256 * CO2_DATA[2]) + CO2_DATA[3];
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// 校验
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uint8_t CHECKSUM = (0xFF - (CO2_DATA[1] + CO2_DATA[2] + CO2_DATA[3] + CO2_DATA[4] + \
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CO2_DATA[5] + CO2_DATA[6] + CO2_DATA[7])) + 1;
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if (CO2_DATA[8] == CHECKSUM && CO2_DATA[1] == 0x86) {
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//printf("CHECKSUM: %X = %X\n", CO2_DATA[8], CHECKSUM);
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//printf("CO2 Concentration: %d ppm\n", CO2_CONC);
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*MH_Z14B_DATA_IS_OK = 1;
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} else {
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// 校准传感器 零点 （ZERO）
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uint8_t ZERO[] = { 0XFF, 0X01, 0X87, 0X00, 0X00, 0X00, 0X00, 0X00, 0X78 };
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uart_write_blocking(UART1, ZERO, 9);
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sleep_ms(200);
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// 校准传感器 跨度点 （SPAN）
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uint8_t SPAN[] = { 0XFF, 0X01, 0X88, 0X07, 0XD0, 0X00, 0X00, 0X00, 0XA0 };
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uart_write_blocking(UART1, SPAN, 9);
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sleep_ms(200);
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*MH_Z14B_DATA_IS_OK = 0;
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printf("CO2 concentration reading failed!\n");
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}
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return CO2_CONC;
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}
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void CO2(void *pvParameters)
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{
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uint16_t CO2_DATA = -1;
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int MH_Z14B_DATA_IS_OK = 0;
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MH_Z14B_INIT();
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_printTaskStackHighWaterMark("CO2");
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while (1) {
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CO2_DATA = MH_Z14B(&MH_Z14B_DATA_IS_OK);
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if (CO2_DATA != -1 && MH_Z14B_DATA_IS_OK == 1) {
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printf("CO2 Concentration: %d ppm\n", CO2_DATA);
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char CO2_DATA_TEMP[BUFER] = { 0 };
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sprintf(CO2_DATA_TEMP, "CO2 Concentration: %d ppm\n", CO2_DATA);
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_HC_12(CO2_DATA_TEMP);
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}
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//_printTaskStackHighWaterMark("CO2");
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watchdog_update(); // 喂狗
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vTaskDelay(pdMS_TO_TICKS(3000)); // 非阻塞延时
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printf("\n");
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}
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return ;
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}
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