Improve PSRAM support (#2884)

esphome/components/psram/psram.cpp

@@ -0,0 +1,32 @@
+#include "psram.h"
+
+#ifdef USE_ESP32
+
+#include "esphome/core/log.h"
+
+#include <esp_heap_caps.h>
+#include <esp_idf_version.h>
+
+namespace esphome {
+namespace psram {
+
+static const char *const TAG = "psram";
+
+void PsramComponent::dump_config() {
+  // Technically this can be false if the PSRAM is full, but heap_caps_get_total_size() isn't always available, and it's
+  // very unlikely for the PSRAM to be full.
+  bool available = heap_caps_get_free_size(MALLOC_CAP_SPIRAM) > 0;
+
+  ESP_LOGCONFIG(TAG, "PSRAM:");
+  ESP_LOGCONFIG(TAG, "  Available: %s", YESNO(available));
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 1, 0)
+  if (available) {
+    ESP_LOGCONFIG(TAG, "  Size: %d MB", heap_caps_get_total_size(MALLOC_CAP_SPIRAM) / 1024 / 1024);
+  }
+#endif
+}
+
+}  // namespace psram
+}  // namespace esphome
+
+#endif