Add more methods to access memory properties

cores/esp32/Esp.cpp

@@ -112,16 +112,50 @@ void EspClass::restart(void)
     esp_restart();
 }
 
+uint32_t EspClass::getHeapSize(void)
+{
+    multi_heap_info_t info;
+    heap_caps_get_info(&info, MALLOC_CAP_INTERNAL);
+    return info.total_free_bytes + info.total_allocated_bytes;
+}
+
 uint32_t EspClass::getFreeHeap(void)
 {
     return heap_caps_get_free_size(MALLOC_CAP_INTERNAL);
 }
 
+uint32_t EspClass::getMinFreeHeap(void)
+{
+    return heap_caps_get_minimum_free_size(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getMaxAllocHeap(void)
+{
+    return heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL);
+}
+
+uint32_t EspClass::getPsramSize(void)
+{
+    multi_heap_info_t info;
+    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+    return info.total_free_bytes + info.total_allocated_bytes;
+}
+
 uint32_t EspClass::getFreePsram(void)
 {
     return heap_caps_get_free_size(MALLOC_CAP_SPIRAM);
 }
 
+uint32_t EspClass::getMinFreePsram(void)
+{
+    return heap_caps_get_minimum_free_size(MALLOC_CAP_SPIRAM);
+}
+
+uint32_t EspClass::getMaxAllocPsram(void)
+{
+    return heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM);
+}
+
 uint8_t EspClass::getChipRevision(void)
 {
     esp_chip_info_t chip_info;

cores/esp32/Esp.h

@@ -56,8 +56,19 @@ public:
     EspClass() {}
     ~EspClass() {}
     void restart();
-    uint32_t getFreeHeap();
+
+    //Internal RAM
+    uint32_t getHeapSize(); //total heap size
+    uint32_t getFreeHeap(); //available heap
+    uint32_t getMinFreeHeap(); //lowest level of free heap since boot
+    uint32_t getMaxAllocHeap(); //largest block of heap that can be allocated at once
+
+    //SPI RAM
+    uint32_t getPsramSize();
     uint32_t getFreePsram();
+    uint32_t getMinFreePsram();
+    uint32_t getMaxAllocPsram();
+
     uint8_t getChipRevision();
     uint8_t getCpuFreqMHz(){ return CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ; }
     uint32_t getCycleCount();