#include<Wire.h>#include<malloc.h>extern"C"char *sbrk(int i);/* Use linker definition*/externchar _end;externchar _sdata;externchar _estack;externchar _Min_Stack_Size;staticchar *ramstart = &_sdata;staticchar *ramend = &_estack;staticchar *minSP = (char *)(ramend - &_Min_Stack_Size);voiddisplay_mallinfo(void) {char *heapend = (char *)sbrk(0);char *stack_ptr = (char *)__get_MSP();structmallinfo mi =mallinfo();  Serial.print("Total non-mmapped bytes (arena):");  Serial.println(mi.arena);  Serial.print("# of free chunks (ordblks):");  Serial.println(mi.ordblks);  Serial.print("# of free fastbin blocks (smblks):");  Serial.println(mi.smblks);  Serial.print("# of mapped regions (hblks):");  Serial.println(mi.hblks);  Serial.print("Bytes in mapped regions (hblkhd):");  Serial.println(mi.hblkhd);  Serial.print("Max. total allocated space (usmblks):");  Serial.println(mi.usmblks);  Serial.print("Free bytes held in fastbins (fsmblks):");  Serial.println(mi.fsmblks);  Serial.print("Total allocated space (uordblks):");  Serial.println(mi.uordblks);  Serial.print("Total free space (fordblks):");  Serial.println(mi.fordblks);  Serial.print("Topmost releasable block (keepcost):");  Serial.println(mi.keepcost);  Serial.print("RAM Start at:       0x");  Serial.println((unsignedlong)ramstart, HEX);  Serial.print("Data/Bss end at:    0x");  Serial.println((unsignedlong)&_end, HEX);  Serial.print("Heap end at:        0x");  Serial.println((unsignedlong)heapend, HEX);  Serial.print("Stack Ptr end at:   0x");  Serial.println((unsignedlong)stack_ptr, HEX);  Serial.print("RAM End at:         0x");  Serial.println((unsignedlong)ramend, HEX);  Serial.print("Heap RAM Used:");  Serial.println(mi.uordblks);  Serial.print("Program RAM Used:");  Serial.println(&_end - ramstart);  Serial.print("Stack RAM Used:");  Serial.println(ramend - stack_ptr);  Serial.print("Estimated Free RAM:");  Serial.println(((stack_ptr < minSP) ? stack_ptr : minSP) - heapend + mi.fordblks);}voidsetup() {// initialize serial communication at 115200 bits per second:  Serial.begin(115200);delay(1000);}#defineDATA_SIZE WIRE_MAX_TX_BUFF_LENGTHconstuint8_t data[DATA_SIZE] = {0xFF };voidloop() {  Serial.println("============== Before allocating blocks ==============");display_mallinfo();// Instantiate Wire  TwoWire Wire1 =TwoWire();  Wire1.begin();  Wire1.beginTransmission(0x38);  Wire1.write(data, DATA_SIZE);  Serial.println("============== After allocating blocks ==============");display_mallinfo();delay(1000);}