Diff: main.cpp

Revision:

0:c8ecd653066c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 16 13:00:07 2021 +0000
@@ -0,0 +1,95 @@
+
+
+/*
+ * Copyright (c) 2021, Sensirion AG
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of Sensirion AG nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "mbed.h"
+#include <stdio.h>  // printf
+
+#include "scd4x_i2c.h"
+#include "sensirion_common.h"
+#include "sensirion_i2c_hal.h"
+
+/**
+ * TO USE CONSOLE OUTPUT (PRINTF) IF NOT PRESENT ON YOUR PLATFORM
+ */
+//#define printf(...)
+
+int main(void) {
+    int16_t error = 0;
+
+    sensirion_i2c_hal_init();
+
+    // Clean up potential SCD40 states
+    scd4x_wake_up();
+    scd4x_stop_periodic_measurement();
+    scd4x_reinit();
+
+    uint16_t serial_0;
+    uint16_t serial_1;
+    uint16_t serial_2;
+    error = scd4x_get_serial_number(&serial_0, &serial_1, &serial_2);
+    if (error) {
+        printf("Error executing scd4x_get_serial_number(): %i\n", error);
+    } else {
+        printf("serial: 0x%04x%04x%04x\n", serial_0, serial_1, serial_2);
+    }
+
+    // Start Measurement
+
+    error = scd4x_start_periodic_measurement();
+    if (error) {
+        printf("Error executing scd4x_start_periodic_measurement(): %i\n",
+               error);
+    }
+
+    printf("Waiting for first measurement... (5 sec)\n");
+
+    for (;;) {
+        // Read Measurement
+        sensirion_i2c_hal_sleep_usec(5000000);
+
+        uint16_t co2;
+        int32_t temperature;
+        int32_t humidity;
+        error = scd4x_read_measurement(&co2, &temperature, &humidity);
+        if (error) {
+            printf("Error executing scd4x_read_measurement(): %i\n", error);
+        } else if (co2 == 0) {
+            printf("Invalid sample detected, skipping.\n");
+        } else {
+            printf("CO2: %u\n", co2);
+            printf("Temperature: %d m°C\n", temperature);
+            printf("Humidity: %d mRH\n", humidity);
+        }
+    }
+
+    return 0;
+}
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