ESP32-芯片与系统信息获取

    //Internal RAM
    uint32_t getHeapSize(); //total heap size 全部的片内内存大小
    uint32_t getFreeHeap(); //available heap  可以内存大小
    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 外设需要自己设计
    uint32_t getPsramSize();
    uint32_t getFreePsram();
    uint32_t getMinFreePsram();
    uint32_t getMaxAllocPsram();

    uint8_t getChipRevision();
    uint32_t getCpuFreqMHz(){ return getCpuFrequencyMhz(); }
    inline uint32_t getCycleCount() __attribute__((always_inline));
    const char * getSdkVersion();     
    uint64_t getEfuseMac();

 1 #include <Arduino.h>
 2 
 3 void setup()
 4 {
 5   Serial.begin(9600);
 6   Serial.println("");
 7 }
 8 
 9 uint64_t chipid;  
10 
11 void loop()
12 {
13   chipid=ESP.getEfuseMac();//The chip ID is essentially its MAC address(length: 6 bytes).
14   Serial.printf("ESP32 Chip ID = %04X",(uint16_t)(chipid>>32));//print High 2 bytes
15   Serial.printf("%08X\n",(uint32_t)chipid);//print Low 4bytes. 
16 
17   Serial.printf("total heap size = %u\n",ESP.getHeapSize());
18   Serial.printf("available heap = %u\n",ESP.getFreeHeap());
19   Serial.printf("lowest level of free heap since boot = %u\n",ESP.getMinFreeHeap());
20   Serial.printf("largest block of heap that can be allocated at once = %u\n",ESP.getMaxAllocHeap());
21 
22   Serial.printf("total Psram size = %u\n",ESP.getPsramSize());
23   Serial.printf("available Psram = %u\n",ESP.getFreePsram());
24   Serial.printf("lowest level of free Psram since boot = %u\n",ESP.getMinFreePsram());
25   Serial.printf("largest block of Psram that can be allocated at once = %u\n",ESP.getMinFreePsram());
26 
27   Serial.printf("get Chip Revision = %u\n",ESP.getChipRevision());
28   Serial.printf("getCpuFreqMHz = %u\n",ESP.getCpuFreqMHz());
29   Serial.printf("get Cycle Count = %u\n",ESP.getCycleCount());
30   Serial.printf("get SdkVersion = %s\n",ESP.getSdkVersion());
31   
32   delay(5000);
33 }