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我試圖從ATMega32微控制器中將uint8_t和uint16_t成員的結構保存到外部EEPROM中。出於這個原因，我寫了一個函數來保存這個結構，另一個函數再次讀取它。 在讀取函數中，地址作爲指針傳入。在函數內部，通過RS232打印值，但是我得到了錯誤的數據以及錯誤的地址（下面的終端輸出）。但我不改變地址（屁股你可以看到），我不知道爲什麼輸出它'600'。 保存單個字節的功能正常工作，我已經單獨測試了它們。在AVR微控制器上使用Structs
這是我嘗試準備結構的主程序，保存並最終再次讀取。在主程序
uint16_t testSaveAddr = 20;
uint16_t testLoadAddr = 20;
dataEntry testData;
dataEntry loadData;
testData.airPressure = 1023;
testData.batteryCharge = 140;
testData.dayOfMonth = 20;
testData.hours24 = 11;
testData.humidityInside = 63;
testData.humidityOutside = 80;
testData.lightVal = 123;
testData.minutes = 30;
testData.month = 11;
testData.rain = 0;
testData.temperatureInside = 240;
testData.temperatureOutside = 130;
testData.windDirection = 4;
testData.windVelocity = 300;
testData.yearS70 = 35;
saveDataSet(EEPROM_1_ADDR,testData,&testSaveAddr);
_delay_ms(200);
readDataSet(EEPROM_1_ADDR,&testLoadAddr,&loadData);
_delay_ms(200);
uint8_t saveDataSet (char address_device, dataEntry dS, uint16_t *firstAvailableAddr)
{
uart_puts("*** SAVING NOW ****\n");
//hum -> timeStamp, LOW -> HIGH
uint16_t addr = *firstAvailableAddr;
char text[20];
sprintf(text,"1.| addr: %d\t data: %d\n",addr,dS.humidityOutside);
uart_puts(text);
save_byte_to_eeprom(address_device, addr++, dS.humidityOutside);
sprintf(text,"1.| addr: %d\t data: %d\n",addr,dS.humidityInside);
uart_puts(text);
save_byte_to_eeprom(address_device, addr++, dS.humidityInside);
save_byte_to_eeprom(address_device, addr++, (dS.temperatureOutside)&0xFF);
save_byte_to_eeprom(address_device, addr++, ((dS.temperatureOutside)>>8)&0xFF);
save_byte_to_eeprom(address_device, addr++, (dS.temperatureInside)&0x0FF);
save_byte_to_eeprom(address_device, addr++, ((dS.temperatureInside)>>8)&0xFF);
save_byte_to_eeprom(address_device, addr++, (dS.airPressure)&0xFF);
save_byte_to_eeprom(address_device, addr++, ((dS.airPressure)>>8)&0xFF);
save_byte_to_eeprom(address_device, addr++, (dS.windVelocity)&0xFF);
save_byte_to_eeprom(address_device, addr++, ((dS.windVelocity)>>8)&0xFF);
save_byte_to_eeprom(address_device, addr++, dS.windDirection);
save_byte_to_eeprom(address_device, addr++, dS.lightVal);
save_byte_to_eeprom(address_device, addr++, dS.rain);
save_byte_to_eeprom(address_device, addr++, dS.batteryCharge);
//timeStamp
save_byte_to_eeprom(address_device, addr++, dS.minutes);
save_byte_to_eeprom(address_device, addr++, dS.hours24);
save_byte_to_eeprom(address_device, addr++, dS.dayOfMonth);
save_byte_to_eeprom(address_device, addr++, dS.month);
save_byte_to_eeprom(address_device, addr++, dS.yearS70);
//update, when dataset is fully stored, in case of an error
*firstAvailableAddr = addr;
return 1;
}
uint8_t readDataSet (char address_device, uint16_t *nextDSaddr, dataEntry dS)
{
uint16_t addr = *nextDSaddr;
char text[20];
uart_puts("**** READING NOW ****");
dS->humidityOutside = read_byte_from_eeprom(address_device,addr);
sprintf(text,"1.| addr: %d\t data: %d\n",addr,dS->humidityOutside);
uart_puts(text);
addr++;
dS->humidityInside = read_byte_from_eeprom(address_device,addr++);
uint8_t tempOutLow = read_byte_from_eeprom(address_device,addr++);
uint8_t tempOutHigh = read_byte_from_eeprom(address_device,addr++);
dS->temperatureOutside = (tempOutHigh<<8)+tempOutLow;
uint8_t tempInLow = read_byte_from_eeprom(address_device,addr++);
uint8_t tempInHigh = read_byte_from_eeprom(address_device,addr++);
dS->temperatureInside = (tempInHigh<<8)+tempInLow;
uint8_t airPressLow = read_byte_from_eeprom(address_device,addr++);
uint8_t airPressHigh = read_byte_from_eeprom(address_device,addr++);
dS->airPressure = (airPressHigh<<8)+airPressLow;
uint8_t windVelLow = read_byte_from_eeprom(address_device,addr++);
uint8_t windVelHigh = read_byte_from_eeprom(address_device,addr++);
dS->airPressure = (windVelHigh<<8)+windVelLow;
dS->windDirection = read_byte_from_eeprom(address_device,addr++);
dS->lightVal = read_byte_from_eeprom(address_device,addr++);
dS->rain = read_byte_from_eeprom(address_device,addr++);
dS->batteryCharge = read_byte_from_eeprom(address_device,addr++);
//timestamp
dS->minutes = read_byte_from_eeprom(address_device,addr++);
dS->hours24 = read_byte_from_eeprom(address_device,addr++);
dS->dayOfMonth = read_byte_from_eeprom(address_device,addr++);
dS->month = read_byte_from_eeprom(address_device,addr++);
dS->yearS70 = read_byte_from_eeprom(address_device,addr++);
*nextDSaddr = addr;
return 1;
}
端子輸出：
*** SAVING NOW ****
1.| addr: 20 data: 80
1.| addr: 21 data: 63
**** READING NOW ******
1.| addr: 600 data: 255