Différences

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

--- start:arduino:esp32:i2c_spi:multiple [2022/11/01 06:58] – gerardadmin
+++ start:arduino:esp32:i2c_spi:multiple [2023/01/27 16:08] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 6: / Ligne 6: @@
 {{ :start:arduino:esp32:i2c_spi:capture_d_ecran_du_2022-11-01_06-45-19.jpg?direct&600 |}}
+En bref, pour utiliser HSPI et VSPI simultanément, il vous suffit de le faire.
+) Tout d’abord, assurez-vous d’inclure la [[https://github.com/espressif/arduino-esp32/archive/refs/heads/master.zip|Bibliothèque SPI arduino-esp32]] dans votre code.
+    #include <SPI.h>
+) Initialiser deux Classe SPI objets avec des noms différents, un sur le bus HSPI et un autre sur le bus VSPI. Par exemple:
+    vspi = new SPIClass(VSPI);
+    hspi = new SPIClass(HSPI);
+) Appeler le beginr() méthode sur ces objets.
+    vspi.begin();
+    hspi.begin();
+Vous pouvez transmettre des broches personnalisées au begin() méthode si nécessaire.
+    vspi.begin(VSPI_CLK, VSPI_MISO, VSPI_MOSI, VSPI_SS);
+    hspi.begin(HSPI_CLK, HSPI_MISO, HSPI_MOSI, HSPI_SS);
+) Enfin, vous devez également définir les broches SS comme sorties. Par exemple:
+    pinMode(VSPI_SS, OUTPUT);
+    pinMode(HSPI_SS, OUTPUT);
+Ensuite, utilisez les commandes habituelles pour interagir avec les appareils SPI, que vous utilisiez une bibliothèque de capteurs ou les méthodes de la bibliothèque SPI.
+Vous pouvez trouver un exemple d’utilisation de plusieurs bus SPI sur la [[https://github.com/espressif/arduino-esp32/archive/refs/heads/master.zip|Bibliothèque SPI arduino-esp32]]. Voir l’exemple ci-dessous :
+<code c exemple_Multiple_SPI_ESP32.ino>
+/* The ESP32 has four SPi buses, however as of right now only two of
+ * them are available to use, HSPI and VSPI. Simply using the SPI API
+ * as illustrated in Arduino examples will use VSPI, leaving HSPI unused.
+ *
+ * However if we simply intialise two instance of the SPI class for both
+ * of these buses both can be used. However when just using these the Arduino
+ * way only will actually be outputting at a time.
+ *
+ * Logic analyser capture is in the same folder as this example as
+ * "multiple_bus_output.png"
+ *
+ * created 30/04/2018 by Alistair Symonds
+ */
+#include <SPI.h>
+// Define ALTERNATE_PINS to use non-standard GPIO pins for SPI bus
+#ifdef ALTERNATE_PINS
+  #define VSPI_MISO   2
+  #define VSPI_MOSI   4
+  #define VSPI_SCLK   0
+  #define VSPI_SS     33
+  #define HSPI_MISO   26
+  #define HSPI_MOSI   27
+  #define HSPI_SCLK   25
+  #define HSPI_SS     32
+#else
+  #define VSPI_MISO   MISO
+  #define VSPI_MOSI   MOSI
+  #define VSPI_SCLK   SCK
+  #define VSPI_SS     SS
+  #define HSPI_MISO   12
+  #define HSPI_MOSI   13
+  #define HSPI_SCLK   14
+  #define HSPI_SS     15
+#endif
+#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
+#define VSPI FSPI
+#endif
+static const int spiClk = 1000000; // 1 MHz
+//uninitalised pointers to SPI objects
+SPIClass * vspi = NULL;
+SPIClass * hspi = NULL;
+void setup() {
+  //initialise two instances of the SPIClass attached to VSPI and HSPI respectively
+  vspi = new SPIClass(VSPI);
+  hspi = new SPIClass(HSPI);
+  //clock miso mosi ss
+#ifndef ALTERNATE_PINS
+  //initialise vspi with default pins
+  //SCLK = 18, MISO = 19, MOSI = 23, SS = 5
+  vspi->begin();
+#else
+  //alternatively route through GPIO pins of your choice
+  vspi->begin(VSPI_SCLK, VSPI_MISO, VSPI_MOSI, VSPI_SS); //SCLK, MISO, MOSI, SS
+#endif
+#ifndef ALTERNATE_PINS
+  //initialise hspi with default pins
+  //SCLK = 14, MISO = 12, MOSI = 13, SS = 15
+  hspi->begin();
+#else
+  //alternatively route through GPIO pins
+  hspi->begin(HSPI_SCLK, HSPI_MISO, HSPI_MOSI, HSPI_SS); //SCLK, MISO, MOSI, SS
+#endif
+  //set up slave select pins as outputs as the Arduino API
+  //doesn't handle automatically pulling SS low
+  pinMode(vspi->pinSS(), OUTPUT); //VSPI SS
+  pinMode(hspi->pinSS(), OUTPUT); //HSPI SS
+}
+// the loop function runs over and over again until power down or reset
+void loop() {
+  //use the SPI buses
+  spiCommand(vspi, 0b01010101); // junk data to illustrate usage
+  spiCommand(hspi, 0b11001100);
+  delay(100);
+}
+void spiCommand(SPIClass *spi, byte data) {
+  //use it as you would the regular arduino SPI API
+  spi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE0));
+  digitalWrite(spi->pinSS(), LOW); //pull SS slow to prep other end for transfer
+  spi->transfer(data);
+  digitalWrite(spi->pinSS(), HIGH); //pull ss high to signify end of data transfer
+  spi->endTransaction();
+}
+</code>