【lora节点开发板+单通道lora网关组合试用试用体验】EEPROM的读与写

2021-10-26 22:30:53 1035

0 EEPROM (Electrically Erasable Programmable read only memory)是指带电可擦可编程只读存储器。是一种掉电后数据不丢失的存储芯片。 EEPROM 可以在电脑上或专用设备上擦除已有信息，重新编程。一般用在即插即用。直接上代码，代码里也有一些注解 /* EEPROM Write Stores values read from analog input 0 into the EEPROM. These values will stay in the EEPROM when the board is turned off and may be retrieved later by another sketch. / #include // the current address in the EEPROM (i.e. which byte // we're going to write to next) int addr = 0; byte value; void setup() { Serial.begin(115200); EEPROM.begin(512); } void loop() { // need to divide by 4 because analog inputs range from // 0 to 1023 and each byte of the EEPROM can only hold a // value from 0 to 255. int val = 20 / 4; // write the value to the appropriate byte of the EEPROM. // these values will remain there when the board is // turned off. //向地址0写数据 EEPROM.write(addr, val); // advance to the next address. there are 512 bytes in // the EEPROM, so go back to 0 when we hit 512. // save all changes to the flash. addr = addr + 1; Serial.print(addr); Serial.println(); if (addr == 512) { addr = 0; if (EEPROM.commit()) { Serial.println("EEPROM successfully committed"); //从地址0读数据 value = EEPROM.read(addr); Serial.print(addr); Serial.print("t"); Serial.print(value, DEC); Serial.println(); } else { Serial.println("ERROR! EEPROM commit failed"); } } delay(100); } 复制代码* 上图看结果： 0
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