Différences

Ci-dessous, les différences entre deux révisions de la page.

--- start:arduino:i2c:tca9548a [2024/04/15 13:18] – [Câblage et test Arduino] gerardadmin
+++ start:arduino:i2c:tca9548a [2024/04/15 13:23] – [Câblage et test Arduino] gerardadmin
@@ Ligne 143: / Ligne 143: @@
 </code>
+Par exemple, l'exécuter sur la configuration ci-dessus vous donnera :
+{{ :start:arduino:i2c:adafruit_products_untitled.png?direct&400 |}}
+Ensuite, vous devrez ajuster le code dont vous disposez pour sélectionner le bon port multiplexé !
+Assurez-vous avant d'interroger le capteur que vous appelez tcaselect pour obtenir le bon
+<code c prog003.ino>
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_HMC5883_U.h>
+#define TCAADDR 0x70
+/* Assign a unique ID to this sensor at the same time */
+Adafruit_HMC5883_Unified mag1 = Adafruit_HMC5883_Unified(1);
+Adafruit_HMC5883_Unified mag2 = Adafruit_HMC5883_Unified(2);
+void displaySensorDetails(Adafruit_HMC5883_Unified *mag)
+{
+  sensor_t sensor;
+  mag->getSensor(&sensor);
+  Serial.println("------------------------------------");
+  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
+  Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
+  Serial.print  ("Unique ID:    "); Serial.println(sensor.sensor_id);
+  Serial.print  ("Max Value:    "); Serial.print(sensor.max_value); Serial.println(" uT");
+  Serial.print  ("Min Value:    "); Serial.print(sensor.min_value); Serial.println(" uT");
+  Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println(" uT");
+  Serial.println("------------------------------------");
+  Serial.println("");
+  delay(500);
+}
+void tcaselect(uint8_t i) {
+  if (i > 7) return;
+  Wire.beginTransmission(TCAADDR);
+  Wire.write(1 << i);
+  Wire.endTransmission();
+}
+void setup(void)
+{
+  Serial.begin(9600);
+  Serial.println("HMC5883 Magnetometer Test"); Serial.println("");
+  /* Initialise the 1st sensor */
+  tcaselect(2);
+  if(!mag1.begin())
+  {
+    /* There was a problem detecting the HMC5883 ... check your connections */
+    Serial.println("Ooops, no HMC5883 detected ... Check your wiring!");
+    while(1);
+  }
+  /* Initialise the 2nd sensor */
+  tcaselect(6);
+  if(!mag2.begin())
+  {
+    /* There was a problem detecting the HMC5883 ... check your connections */
+    Serial.println("Ooops, no HMC5883 detected ... Check your wiring!");
+    while(1);
+  }
+  /* Display some basic information on this sensor */
+  tcaselect(2);
+  displaySensorDetails(&mag1);
+  tcaselect(6);
+  displaySensorDetails(&mag2);
+}
+void loop(void)
+{
+  /* Get a new sensor event */
+  sensors_event_t event;
+  tcaselect(2);
+  mag1.getEvent(&event);
+  /* Display the results (magnetic vector values are in micro-Tesla (uT)) */
+  Serial.print("Sensor #1 - ");
+  Serial.print("X: "); Serial.print(event.magnetic.x); Serial.print("  ");
+  Serial.print("Y: "); Serial.print(event.magnetic.y); Serial.print("  ");
+  Serial.print("Z: "); Serial.print(event.magnetic.z); Serial.print("  ");Serial.println("uT");
+  tcaselect(6);
+  mag2.getEvent(&event);
+  /* Display the results (magnetic vector values are in micro-Tesla (uT)) */
+  Serial.print("Sensor #2 - ");
+  Serial.print("X: "); Serial.print(event.magnetic.x); Serial.print("  ");
+  Serial.print("Y: "); Serial.print(event.magnetic.y); Serial.print("  ");
+  Serial.print("Z: "); Serial.print(event.magnetic.z); Serial.print("  ");Serial.println("uT");
+  delay(500);
+}
+</code>