Add FreeRTOS

2025-07-29 19:13:39 +08:00 · 2024-06-03 18:59:42 +08:00
parent d6007ab75e
commit db774bfd76
16 changed files with 248 additions and 169 deletions
--- a/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp
+++ b/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp
@@ -0,0 +1,74 @@
+#include "MHZ14B.hpp"
+#include "common.hpp"
+
+
+void MH_Z14B_INIT()
+{
+    // 初始化UART
+    uart_init(UART1, BAUD_RATE);
+    gpio_set_function(UART1_TX_PIN, GPIO_FUNC_UART);
+    gpio_set_function(UART1_RX_PIN, GPIO_FUNC_UART);
+    uart_set_hw_flow(UART1, false, false);
+    uart_set_format(UART1, DATA_BITS, STOP_BITS, PARITY);
+}
+
+// CO2
+static uint16_t MH_Z14B(int *MH_Z14B_DATA_IS_OK)
+{
+
+
+    // 0x86 读气体浓度值
+    uint8_t CMD[9] = { 0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 };
+    uart_write_blocking(UART1, CMD, 9);
+    sleep_ms(200);
+
+    // 读取
+    uint8_t CO2_DATA[9] = { 0 };
+    uart_read_blocking(UART1, CO2_DATA, 9);
+
+    // CO2 浓度
+    uint16_t CO2_CONC = (256 * CO2_DATA[2]) + CO2_DATA[3];
+
+    // 校验
+    uint8_t CHECKSUM = (0xFF - (CO2_DATA[1] + CO2_DATA[2] + CO2_DATA[3] + CO2_DATA[4] + CO2_DATA[5] + CO2_DATA[6] + CO2_DATA[7])) + 1;
+
+    if (CO2_DATA[8] == CHECKSUM && CO2_DATA[1] == 0x86) {
+        //printf("CHECKSUM: %X = %X\n", CO2_DATA[8], CHECKSUM);
+        //printf("CO2 Concentration: %d ppm\n", CO2_CONC);
+        *MH_Z14B_DATA_IS_OK = 1;
+    } else {
+        // 校准传感器 零点 （ZERO）
+        uint8_t ZERO[] = { 0XFF, 0X01, 0X87, 0X00, 0X00, 0X00, 0X00, 0X00, 0X78 };
+        uart_write_blocking(UART1, ZERO, 9);
+        sleep_ms(200);
+
+        // 校准传感器 跨度点 （SPAN）
+        uint8_t SPAN[] = { 0XFF, 0X01, 0X88, 0X07, 0XD0, 0X00, 0X00, 0X00, 0XA0 };
+        uart_write_blocking(UART1, SPAN, 9);
+        sleep_ms(200);
+
+        *MH_Z14B_DATA_IS_OK = 0;
+        printf("CO2 concentration reading failed!\n");
+    }
+
+    return CO2_CONC;
+}
+
+void CO2(void *pvParameters)
+{
+    uint16_t CO2_DATA = -1;
+    int MH_Z14B_DATA_IS_OK = 0;
+    MH_Z14B_INIT();
+    _printTaskStackHighWaterMark("MH_Z14B");
+    
+    while(1)
+    {
+        CO2_DATA = MH_Z14B(&MH_Z14B_DATA_IS_OK);
+        if (CO2_DATA != -1 && MH_Z14B_DATA_IS_OK == 1) {
+            printf("CO2 Concentration: %d ppm\n", CO2_DATA);
+        }
+
+        _printTaskStackHighWaterMark("MH_Z14B");
+        vTaskDelay(pdMS_TO_TICKS(3000)); // 非阻塞延时
+    }
+}