spi_example: fix the example to pass in esp32s2beta

examples/peripherals/spi_slave/receiver/main/app_main.c

@@ -57,6 +57,17 @@ Pins in use. The SPI Master can use the GPIO mux, so feel free to change these i
 #define GPIO_SCLK 15
 #define GPIO_CS 14
 
+#ifdef CONFIG_IDF_TARGET_ESP32
+#define RCV_HOST    HSPI_HOST
+#define DMA_CHAN    2
+
+#elif defined CONFIG_IDF_TARGET_ESP32S2BETA
+#define RCV_HOST    SPI2_HOST
+#define DMA_CHAN    RCV_HOST
+
+#endif
+
+
 
 //Called after a transaction is queued and ready for pickup by master. We use this to set the handshake line high.
 void my_post_setup_cb(spi_slave_transaction_t *trans) {
@@ -78,7 +89,9 @@ void app_main()
     spi_bus_config_t buscfg={
         .mosi_io_num=GPIO_MOSI,
         .miso_io_num=GPIO_MISO,
-        .sclk_io_num=GPIO_SCLK
+        .sclk_io_num=GPIO_SCLK,
+        .quadwp_io_num = -1,
+        .quadhd_io_num = -1,
     };
 
     //Configuration for the SPI slave interface
@@ -106,7 +119,7 @@ void app_main()
     gpio_set_pull_mode(GPIO_CS, GPIO_PULLUP_ONLY);
 
     //Initialize SPI slave interface
-    ret=spi_slave_initialize(HSPI_HOST, &buscfg, &slvcfg, 1);
+    ret=spi_slave_initialize(RCV_HOST, &buscfg, &slvcfg, DMA_CHAN);
     assert(ret==ESP_OK);
 
     WORD_ALIGNED_ATTR char sendbuf[129]="";
@@ -130,7 +143,7 @@ void app_main()
         .post_setup_cb callback that is called as soon as a transaction is ready, to let the master know it is free to transfer
         data.
         */
-        ret=spi_slave_transmit(HSPI_HOST, &t, portMAX_DELAY);
+        ret=spi_slave_transmit(RCV_HOST, &t, portMAX_DELAY);
 
         //spi_slave_transmit does not return until the master has done a transmission, so by here we have sent our data and
         //received data from the master. Print it.